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dashboard, p2p, vendor: visualize peers (#19247)

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* dashboard, p2p: visualize peers

* dashboard: change scale to green to red
This commit is contained in:
Kurkó Mihály 2019-03-13 14:53:52 +02:00 committed by Péter Szilágyi
parent 1591b63306
commit 1a29bf0ee2
66 changed files with 48806 additions and 42924 deletions
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1
.gitignore vendored
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@ -42,6 +42,7 @@ profile.cov
/dashboard/assets/node_modules
/dashboard/assets/stats.json
/dashboard/assets/bundle.js
/dashboard/assets/bundle.js.map
/dashboard/assets/package-lock.json
**/yarn-error.log

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dashboard/assets.go
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File diff suppressed because one or more lines are too long

3
dashboard/assets/.eslintignore Normal file
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@ -0,0 +1,3 @@
node_modules/* #ignored by default
flow-typed/*
bundle.js

107
dashboard/assets/.eslintrc
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@ -16,71 +16,66 @@
// React syntax style mostly according to https://github.com/airbnb/javascript/tree/master/react
{
'env': {
'browser': true,
'node': true,
'es6': true,
"env": {
"browser": true,
"node": true,
"es6": true
},
'parser': 'babel-eslint',
'parserOptions': {
'sourceType': 'module',
'ecmaVersion': 6,
'ecmaFeatures': {
'jsx': true,
"parser": "babel-eslint",
"parserOptions": {
"sourceType": "module",
"ecmaVersion": 6,
"ecmaFeatures": {
"jsx": true
}
},
'extends': 'airbnb',
'plugins': [
'flowtype',
'react',
"extends": [
"eslint:recommended",
"airbnb",
"plugin:flowtype/recommended",
"plugin:react/recommended"
],
'rules': {
'no-tabs': 'off',
'indent': ['error', 'tab'],
'react/jsx-indent': ['error', 'tab'],
'react/jsx-indent-props': ['error', 'tab'],
'react/prefer-stateless-function': 'off',
'jsx-quotes': ['error', 'prefer-single'],
'no-plusplus': 'off',
'no-console': ['error', { allow: ['error'] }],
"plugins": [
"flowtype",
"react"
],
"rules": {
"no-tabs": "off",
"indent": ["error", "tab"],
"react/jsx-indent": ["error", "tab"],
"react/jsx-indent-props": ["error", "tab"],
"react/prefer-stateless-function": "off",
"react/destructuring-assignment": ["error", "always", {"ignoreClassFields": true}],
"jsx-quotes": ["error", "prefer-single"],
"no-plusplus": "off",
"no-console": ["error", { "allow": ["error"] }],
// Specifies the maximum length of a line.
'max-len': ['warn', 120, 2, {
'ignoreUrls': true,
'ignoreComments': false,
'ignoreRegExpLiterals': true,
'ignoreStrings': true,
'ignoreTemplateLiterals': true,
"max-len": ["warn", 120, 2, {
"ignoreUrls": true,
"ignoreComments": false,
"ignoreRegExpLiterals": true,
"ignoreStrings": true,
"ignoreTemplateLiterals": true
}],
// Enforces consistent spacing between keys and values in object literal properties.
'key-spacing': ['error', {'align': {
'beforeColon': false,
'afterColon': true,
'on': 'value'
"key-spacing": ["error", {"align": {
"beforeColon": false,
"afterColon": true,
"on": "value"
}}],
// Prohibits padding inside curly braces.
'object-curly-spacing': ['error', 'never'],
'no-use-before-define': 'off', // messageAPI
'default-case': 'off',
'flowtype/boolean-style': ['error', 'boolean'],
'flowtype/define-flow-type': 'warn',
'flowtype/generic-spacing': ['error', 'never'],
'flowtype/no-primitive-constructor-types': 'error',
'flowtype/no-weak-types': 'error',
'flowtype/object-type-delimiter': ['error', 'comma'],
'flowtype/require-valid-file-annotation': 'error',
'flowtype/semi': ['error', 'always'],
'flowtype/space-after-type-colon': ['error', 'always'],
'flowtype/space-before-generic-bracket': ['error', 'never'],
'flowtype/space-before-type-colon': ['error', 'never'],
'flowtype/union-intersection-spacing': ['error', 'always'],
'flowtype/use-flow-type': 'warn',
'flowtype/valid-syntax': 'warn',
"object-curly-spacing": ["error", "never"],
"no-use-before-define": "off", // message types
"default-case": "off"
},
'settings': {
'flowtype': {
'onlyFilesWithFlowAnnotation': true,
"settings": {
"import/resolver": {
"node": {
"paths": ["components"] // import './components/Component' -> import 'Component'
}
},
"flowtype": {
"onlyFilesWithFlowAnnotation": true
}
},
}
}

2
dashboard/assets/.flowconfig
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@ -7,3 +7,5 @@ node_modules/jss/flow-typed
[options]
include_warnings=true
module.system.node.resolve_dirname=node_modules
module.system.node.resolve_dirname=components

33
dashboard/assets/common.jsx
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@ -16,43 +16,46 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
import {faHome, faLink, faGlobeEurope, faTachometerAlt, faList} from '@fortawesome/free-solid-svg-icons';
import {faCreditCard} from '@fortawesome/free-regular-svg-icons';
type ProvidedMenuProp = {|title: string, icon: string|};
const menuSkeletons: Array<{|id: string, menu: ProvidedMenuProp|}> = [
{
id: 'home',
menu: {
title: 'Home',
icon: 'home',
icon: faHome,
},
}, {
id: 'chain',
menu: {
title: 'Chain',
icon: 'link',
icon: faLink,
},
}, {
id: 'txpool',
menu: {
title: 'TxPool',
icon: 'credit-card',
icon: faCreditCard,
},
}, {
id: 'network',
menu: {
title: 'Network',
icon: 'globe',
icon: faGlobeEurope,
},
}, {
id: 'system',
menu: {
title: 'System',
icon: 'tachometer',
icon: faTachometerAlt,
},
}, {
id: 'logs',
menu: {
title: 'Logs',
icon: 'list',
icon: faList,
},
},
];
@ -64,8 +67,26 @@ export const MENU: Map<string, {...MenuProp}> = new Map(menuSkeletons.map(({id,
export const DURATION = 200;
export const chartStrokeWidth = 0.2;
export const styles = {
light: {
color: 'rgba(255, 255, 255, 0.54)',
},
};
// unit contains the units for the bytePlotter.
export const unit = ['', 'Ki', 'Mi', 'Gi', 'Ti', 'Pi', 'Ei', 'Zi', 'Yi'];
// simplifyBytes returns the simplified version of the given value followed by the unit.
export const simplifyBytes = (x: number) => {
let i = 0;
for (; x > 1024 && i < 8; i++) {
x /= 1024;
}
return x.toFixed(2).toString().concat(' ', unit[i], 'B');
};
// hues contains predefined colors for gradient stop colors.
export const hues = ['#00FF00', '#FFFF00', '#FF7F00', '#FF0000'];
export const hueScale = [0, 2048, 102400, 2097152];

4
dashboard/assets/components/ChartRow.jsx
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@ -19,7 +19,7 @@
import React, {Component} from 'react';
import type {ChildrenArray} from 'react';
import Grid from 'material-ui/Grid';
import Grid from '@material-ui/core/Grid';
// styles contains the constant styles of the component.
const styles = {
@ -33,7 +33,7 @@ const styles = {
flex: 1,
padding: 0,
},
}
};
export type Props = {
children: ChildrenArray<React$Element<any>>,

19
dashboard/assets/components/CustomTooltip.jsx
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@ -18,8 +18,8 @@
import React, {Component} from 'react';
import Typography from 'material-ui/Typography';
import {styles} from '../common';
import Typography from '@material-ui/core/Typography';
import {styles, simplifyBytes} from '../common';
// multiplier multiplies a number by another.
export const multiplier = <T>(by: number = 1) => (x: number) => x * by;
@ -37,18 +37,6 @@ export const percentPlotter = <T>(text: string, mapper: (T => T) = multiplier(1)
);
};
// unit contains the units for the bytePlotter.
const unit = ['', 'Ki', 'Mi', 'Gi', 'Ti', 'Pi', 'Ei', 'Zi', 'Yi'];
// simplifyBytes returns the simplified version of the given value followed by the unit.
const simplifyBytes = (x: number) => {
let i = 0;
for (; x > 1024 && i < 8; i++) {
x /= 1024;
}
return x.toFixed(2).toString().concat(' ', unit[i], 'B');
};
// bytePlotter renders a tooltip, which displays the payload as a byte value.
export const bytePlotter = <T>(text: string, mapper: (T => T) = multiplier(1)) => (payload: T) => {
const p = mapper(payload);
@ -70,7 +58,8 @@ export const bytePerSecPlotter = <T>(text: string, mapper: (T => T) = multiplier
}
return (
<Typography type='caption' color='inherit'>
<span style={styles.light}>{text}</span> {simplifyBytes(p)}/s
<span style={styles.light}>{text}</span>
{simplifyBytes(p)}/s
</Typography>
);
};

32
dashboard/assets/components/Dashboard.jsx
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@ -17,14 +17,16 @@
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
import React, {Component} from 'react';
import {hot} from 'react-hot-loader';
import withStyles from 'material-ui/styles/withStyles';
import withStyles from '@material-ui/core/styles/withStyles';
import Header from './Header';
import Body from './Body';
import Header from 'Header';
import Body from 'Body';
import {inserter as logInserter, SAME} from 'Logs';
import {inserter as peerInserter} from 'Network';
import {MENU} from '../common';
import type {Content} from '../types/content';
import {inserter as logInserter} from './Logs';
// deepUpdate updates an object corresponding to the given update data, which has
// the shape of the same structure as the original object. updater also has the same
@ -37,7 +39,6 @@ import {inserter as logInserter} from './Logs';
// of the update.
const deepUpdate = (updater: Object, update: Object, prev: Object): $Shape<Content> => {
if (typeof update === 'undefined') {
// TODO (kurkomisi): originally this was deep copy, investigate it.
return prev;
}
if (typeof updater === 'function') {
@ -88,8 +89,13 @@ const defaultContent: () => Content = () => ({
home: {},
chain: {},
txpool: {},
network: {},
system: {
network: {
peers: {
bundles: {},
},
diff: [],
},
system: {
activeMemory: [],
virtualMemory: [],
networkIngress: [],
@ -103,8 +109,8 @@ const defaultContent: () => Content = () => ({
chunks: [],
endTop: false,
endBottom: true,
topChanged: 0,
bottomChanged: 0,
topChanged: SAME,
bottomChanged: SAME,
},
});
@ -119,7 +125,7 @@ const updaters = {
home: null,
chain: null,
txpool: null,
network: null,
network: peerInserter(200),
system: {
activeMemory: appender(200),
virtualMemory: appender(200),
@ -186,8 +192,8 @@ class Dashboard extends Component<Props, State> {
// reconnect establishes a websocket connection with the server, listens for incoming messages
// and tries to reconnect on connection loss.
reconnect = () => {
// PROD is defined by webpack.
const server = new WebSocket(`${((window.location.protocol === 'https:') ? 'wss://' : 'ws://')}${PROD ? window.location.host : 'localhost:8080'}/api`);
const host = process.env.NODE_ENV === 'production' ? window.location.host : 'localhost:8080';
const server = new WebSocket(`${((window.location.protocol === 'https:') ? 'wss://' : 'ws://')}${host}/api`);
server.onopen = () => {
this.setState({content: defaultContent(), shouldUpdate: {}, server});
};
@ -249,4 +255,4 @@ class Dashboard extends Component<Props, State> {
}
}
export default withStyles(themeStyles)(Dashboard);
export default hot(module)(withStyles(themeStyles)(Dashboard));

76
dashboard/assets/components/Footer.jsx
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@ -18,14 +18,19 @@
import React, {Component} from 'react';
import withStyles from 'material-ui/styles/withStyles';
import Typography from 'material-ui/Typography';
import Grid from 'material-ui/Grid';
import {ResponsiveContainer, AreaChart, Area, Tooltip} from 'recharts';
import withStyles from '@material-ui/core/styles/withStyles';
import Typography from '@material-ui/core/Typography';
import Grid from '@material-ui/core/Grid';
import ResponsiveContainer from 'recharts/es6/component/ResponsiveContainer';
import AreaChart from 'recharts/es6/chart/AreaChart';
import Area from 'recharts/es6/cartesian/Area';
import ReferenceLine from 'recharts/es6/cartesian/ReferenceLine';
import Label from 'recharts/es6/component/Label';
import Tooltip from 'recharts/es6/component/Tooltip';
import ChartRow from './ChartRow';
import CustomTooltip, {bytePlotter, bytePerSecPlotter, percentPlotter, multiplier} from './CustomTooltip';
import {styles as commonStyles} from '../common';
import ChartRow from 'ChartRow';
import CustomTooltip, {bytePlotter, bytePerSecPlotter, percentPlotter, multiplier} from 'CustomTooltip';
import {chartStrokeWidth, styles as commonStyles} from '../common';
import type {General, System} from '../types/content';
const FOOTER_SYNC_ID = 'footerSyncId';
@ -38,6 +43,15 @@ const TRAFFIC = 'traffic';
const TOP = 'Top';
const BOTTOM = 'Bottom';
const cpuLabelTop = 'Process load';
const cpuLabelBottom = 'System load';
const memoryLabelTop = 'Active memory';
const memoryLabelBottom = 'Virtual memory';
const diskLabelTop = 'Disk read';
const diskLabelBottom = 'Disk write';
const trafficLabelTop = 'Download';
const trafficLabelBottom = 'Upload';
// styles contains the constant styles of the component.
const styles = {
footer: {
@ -53,6 +67,10 @@ const styles = {
height: '100%',
width: '99%',
},
link: {
color: 'inherit',
textDecoration: 'none',
},
};
// themeStyles returns the styles generated from the theme for the component.
@ -73,18 +91,23 @@ export type Props = {
shouldUpdate: Object,
};
type State = {};
// Footer renders the footer of the dashboard.
class Footer extends Component<Props> {
shouldComponentUpdate(nextProps) {
class Footer extends Component<Props, State> {
shouldComponentUpdate(nextProps: Readonly<Props>, nextState: Readonly<State>, nextContext: any) {
return typeof nextProps.shouldUpdate.general !== 'undefined' || typeof nextProps.shouldUpdate.system !== 'undefined';
}
// halfHeightChart renders an area chart with half of the height of its parent.
halfHeightChart = (chartProps, tooltip, areaProps) => (
halfHeightChart = (chartProps, tooltip, areaProps, label, position) => (
<ResponsiveContainer width='100%' height='50%'>
<AreaChart {...chartProps} >
<AreaChart {...chartProps}>
{!tooltip || (<Tooltip cursor={false} content={<CustomTooltip tooltip={tooltip} />} />)}
<Area isAnimationActive={false} type='monotone' {...areaProps} />
<Area isAnimationActive={false} strokeWidth={chartStrokeWidth} type='monotone' {...areaProps} />
<ReferenceLine x={0} strokeWidth={0}>
<Label fill={areaProps.fill} value={label} position={position} />
</ReferenceLine>
</AreaChart>
</ResponsiveContainer>
);
@ -111,6 +134,8 @@ class Footer extends Component<Props> {
},
topChart.tooltip,
{dataKey: topKey, stroke: topColor, fill: topColor},
topChart.label,
'insideBottomLeft',
)}
{this.halfHeightChart(
{
@ -120,6 +145,8 @@ class Footer extends Component<Props> {
},
bottomChart.tooltip,
{dataKey: bottomKey, stroke: bottomColor, fill: bottomColor},
bottomChart.label,
'insideTopLeft',
)}
</div>
);
@ -135,37 +162,42 @@ class Footer extends Component<Props> {
{this.doubleChart(
FOOTER_SYNC_ID,
CPU,
{data: system.processCPU, tooltip: percentPlotter('Process load')},
{data: system.systemCPU, tooltip: percentPlotter('System load', multiplier(-1))},
{data: system.processCPU, tooltip: percentPlotter(cpuLabelTop), label: cpuLabelTop},
{data: system.systemCPU, tooltip: percentPlotter(cpuLabelBottom, multiplier(-1)), label: cpuLabelBottom},
)}
{this.doubleChart(
FOOTER_SYNC_ID,
MEMORY,
{data: system.activeMemory, tooltip: bytePlotter('Active memory')},
{data: system.virtualMemory, tooltip: bytePlotter('Virtual memory', multiplier(-1))},
{data: system.activeMemory, tooltip: bytePlotter(memoryLabelTop), label: memoryLabelTop},
{data: system.virtualMemory, tooltip: bytePlotter(memoryLabelBottom, multiplier(-1)), label: memoryLabelBottom},
)}
{this.doubleChart(
FOOTER_SYNC_ID,
DISK,
{data: system.diskRead, tooltip: bytePerSecPlotter('Disk read')},
{data: system.diskWrite, tooltip: bytePerSecPlotter('Disk write', multiplier(-1))},
{data: system.diskRead, tooltip: bytePerSecPlotter(diskLabelTop), label: diskLabelTop},
{data: system.diskWrite, tooltip: bytePerSecPlotter(diskLabelBottom, multiplier(-1)), label: diskLabelBottom},
)}
{this.doubleChart(
FOOTER_SYNC_ID,
TRAFFIC,
{data: system.networkIngress, tooltip: bytePerSecPlotter('Download')},
{data: system.networkEgress, tooltip: bytePerSecPlotter('Upload', multiplier(-1))},
{data: system.networkIngress, tooltip: bytePerSecPlotter(trafficLabelTop), label: trafficLabelTop},
{data: system.networkEgress, tooltip: bytePerSecPlotter(trafficLabelBottom, multiplier(-1)), label: trafficLabelBottom},
)}
</ChartRow>
</Grid>
<Grid item >
<Grid item>
<Typography type='caption' color='inherit'>
<span style={commonStyles.light}>Geth</span> {general.version}
</Typography>
{general.commit && (
<Typography type='caption' color='inherit'>
<span style={commonStyles.light}>{'Commit '}</span>
<a href={`https://github.com/ethereum/go-ethereum/commit/${general.commit}`} target='_blank' style={{color: 'inherit', textDecoration: 'none'}} >
<a
href={`https://github.com/ethereum/go-ethereum/commit/${general.commit}`}
target='_blank'
rel='noopener noreferrer'
style={styles.link}
>
{general.commit.substring(0, 8)}
</a>
</Typography>

18
dashboard/assets/components/Header.jsx
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@ -18,13 +18,13 @@
import React, {Component} from 'react';
import withStyles from 'material-ui/styles/withStyles';
import AppBar from 'material-ui/AppBar';
import Toolbar from 'material-ui/Toolbar';
import IconButton from 'material-ui/IconButton';
import Icon from 'material-ui/Icon';
import MenuIcon from 'material-ui-icons/Menu';
import Typography from 'material-ui/Typography';
import withStyles from '@material-ui/core/styles/withStyles';
import AppBar from '@material-ui/core/AppBar';
import Toolbar from '@material-ui/core/Toolbar';
import IconButton from '@material-ui/core/IconButton';
import {FontAwesomeIcon} from '@fortawesome/react-fontawesome';
import {faBars} from '@fortawesome/free-solid-svg-icons';
import Typography from '@material-ui/core/Typography';
// styles contains the constant styles of the component.
const styles = {
@ -67,9 +67,7 @@ class Header extends Component<Props> {
<AppBar position='static' className={classes.header} style={styles.header}>
<Toolbar className={classes.toolbar} style={styles.toolbar}>
<IconButton onClick={this.props.switchSideBar}>
<Icon>
<MenuIcon />
</Icon>
<FontAwesomeIcon icon={faBars} />
</IconButton>
<Typography type='title' color='inherit' noWrap className={classes.title}>
Go Ethereum Dashboard

17
dashboard/assets/components/Logs.jsx
View File

@ -18,7 +18,8 @@
import React, {Component} from 'react';
import List, {ListItem} from 'material-ui/List';
import List from '@material-ui/core/List';
import ListItem from '@material-ui/core/ListItem';
import escapeHtml from 'escape-html';
import type {Record, Content, LogsMessage, Logs as LogsType} from '../types/content';
@ -104,9 +105,9 @@ const createChunk = (records: Array<Record>) => {
// ADDED, SAME and REMOVED are used to track the change of the log chunk array.
// The scroll position is set using these values.
const ADDED = 1;
const SAME = 0;
const REMOVED = -1;
export const ADDED = 1;
export const SAME = 0;
export const REMOVED = -1;
// inserter is a state updater function for the main component, which inserts the new log chunk into the chunk array.
// limit is the maximum length of the chunk array, used in order to prevent the browser from OOM.
@ -166,7 +167,7 @@ export const inserter = (limit: number) => (update: LogsMessage, prev: LogsType)
// styles contains the constant styles of the component.
const styles = {
logListItem: {
padding: 0,
padding: 0,
lineHeight: 1.231,
},
logChunk: {
@ -251,15 +252,15 @@ class Logs extends Component<Props, State> {
// atBottom checks if the scroll position it at the bottom of the container.
atBottom = () => {
const {container} = this.props;
return container.scrollHeight - container.scrollTop <=
container.clientHeight + container.scrollHeight * requestBand;
return container.scrollHeight - container.scrollTop
<= container.clientHeight + container.scrollHeight * requestBand;
};
// beforeUpdate is called by the parent component, saves the previous scroll position
// and the height of the first log chunk, which can be deleted during the insertion.
beforeUpdate = () => {
let firstHeight = 0;
let chunkList = this.content.children[1];
const chunkList = this.content.children[1];
if (chunkList && chunkList.children[0]) {
firstHeight = chunkList.children[0].clientHeight;
}

38
dashboard/assets/components/Main.jsx
View File

@ -18,11 +18,12 @@
import React, {Component} from 'react';
import withStyles from 'material-ui/styles/withStyles';
import withStyles from '@material-ui/core/styles/withStyles';
import Network from 'Network';
import Logs from 'Logs';
import Footer from 'Footer';
import {MENU} from '../common';
import Logs from './Logs';
import Footer from './Footer';
import type {Content} from '../types/content';
// styles contains the constant styles of the component.
@ -33,7 +34,7 @@ const styles = {
width: '100%',
},
content: {
flex: 1,
flex: 1,
overflow: 'auto',
},
};
@ -54,21 +55,16 @@ export type Props = {
send: string => void,
};
type State = {};
// Main renders the chosen content.
class Main extends Component<Props> {
class Main extends Component<Props, State> {
constructor(props) {
super(props);
this.container = React.createRef();
this.content = React.createRef();
}
getSnapshotBeforeUpdate() {
if (this.content && typeof this.content.beforeUpdate === 'function') {
return this.content.beforeUpdate();
}
return null;
}
componentDidUpdate(prevProps, prevState, snapshot) {
if (this.content && typeof this.content.didUpdate === 'function') {
this.content.didUpdate(prevProps, prevState, snapshot);
@ -81,6 +77,13 @@ class Main extends Component<Props> {
}
};
getSnapshotBeforeUpdate(prevProps: Readonly<P>, prevState: Readonly<S>) {
if (this.content && typeof this.content.beforeUpdate === 'function') {
return this.content.beforeUpdate();
}
return null;
}
render() {
const {
classes, active, content, shouldUpdate,
@ -89,9 +92,20 @@ class Main extends Component<Props> {
let children = null;
switch (active) {
case MENU.get('home').id:
children = <div>Work in progress.</div>;
break;
case MENU.get('chain').id:
children = <div>Work in progress.</div>;
break;
case MENU.get('txpool').id:
children = <div>Work in progress.</div>;
break;
case MENU.get('network').id:
children = <Network
content={this.props.content.network}
container={this.container}
/>;
break;
case MENU.get('system').id:
children = <div>Work in progress.</div>;
break;

529
dashboard/assets/components/Network.jsx Normal file
View File

@ -0,0 +1,529 @@
// @flow
// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
import React, {Component} from 'react';
import Table from '@material-ui/core/Table';
import TableHead from '@material-ui/core/TableHead';
import TableBody from '@material-ui/core/TableBody';
import TableRow from '@material-ui/core/TableRow';
import TableCell from '@material-ui/core/TableCell';
import Grid from '@material-ui/core/Grid/Grid';
import Typography from '@material-ui/core/Typography';
import {AreaChart, Area, Tooltip, YAxis} from 'recharts';
import {FontAwesomeIcon} from '@fortawesome/react-fontawesome';
import {faCircle as fasCircle} from '@fortawesome/free-solid-svg-icons';
import {faCircle as farCircle} from '@fortawesome/free-regular-svg-icons';
import convert from 'color-convert';
import CustomTooltip, {bytePlotter, multiplier} from 'CustomTooltip';
import type {Network as NetworkType, PeerEvent} from '../types/content';
import {styles as commonStyles, chartStrokeWidth, hues, hueScale} from '../common';
// Peer chart dimensions.
const trafficChartHeight = 18;
const trafficChartWidth = 400;
// setMaxIngress adjusts the peer chart's gradient values based on the given value.
const setMaxIngress = (peer, value) => {
peer.maxIngress = value;
peer.ingressGradient = [];
peer.ingressGradient.push({offset: hueScale[0], color: hues[0]});
let i = 1;
for (; i < hues.length && value > hueScale[i]; i++) {
peer.ingressGradient.push({offset: Math.floor(hueScale[i] * 100 / value), color: hues[i]});
}
i--;
if (i < hues.length - 1) {
// Usually the maximum value gets between two points on the predefined
// color scale (e.g. 123KB is somewhere between 100KB (#FFFF00) and
// 1MB (#FF0000)), and the charts need to be comparable by the colors,
// so we have to calculate the last hue using the maximum value and the
// surrounding hues in order to avoid the uniformity of the top colors
// on the charts. For this reason the two hues are translated into the
// CIELAB color space, and the top color will be their weighted average
// (CIELAB is perceptually uniform, meaning that any point on the line
// between two pure color points is also a pure color, so the weighted
// average will not lose from the saturation).
//
// In case the maximum value is greater than the biggest predefined
// scale value, the top of the chart will have uniform color.
const lastHue = convert.hex.lab(hues[i]);
const proportion = (value - hueScale[i]) * 100 / (hueScale[i + 1] - hueScale[i]);
convert.hex.lab(hues[i + 1]).forEach((val, j) => {
lastHue[j] = (lastHue[j] * proportion + val * (100 - proportion)) / 100;
});
peer.ingressGradient.push({offset: 100, color: `#${convert.lab.hex(lastHue)}`});
}
};
// setMaxEgress adjusts the peer chart's gradient values based on the given value.
// In case of the egress the chart is upside down, so the gradients need to be
// calculated inversely compared to the ingress.
const setMaxEgress = (peer, value) => {
peer.maxEgress = value;
peer.egressGradient = [];
peer.egressGradient.push({offset: 100 - hueScale[0], color: hues[0]});
let i = 1;
for (; i < hues.length && value > hueScale[i]; i++) {
peer.egressGradient.unshift({offset: 100 - Math.floor(hueScale[i] * 100 / value), color: hues[i]});
}
i--;
if (i < hues.length - 1) {
// Calculate the last hue.
const lastHue = convert.hex.lab(hues[i]);
const proportion = (value - hueScale[i]) * 100 / (hueScale[i + 1] - hueScale[i]);
convert.hex.lab(hues[i + 1]).forEach((val, j) => {
lastHue[j] = (lastHue[j] * proportion + val * (100 - proportion)) / 100;
});
peer.egressGradient.unshift({offset: 0, color: `#${convert.lab.hex(lastHue)}`});
}
};
// setIngressChartAttributes searches for the maximum value of the ingress
// samples, and adjusts the peer chart's gradient values accordingly.
const setIngressChartAttributes = (peer) => {
let max = 0;
peer.ingress.forEach(({value}) => {
if (value > max) {
max = value;
}
});
setMaxIngress(peer, max);
};
// setEgressChartAttributes searches for the maximum value of the egress
// samples, and adjusts the peer chart's gradient values accordingly.
const setEgressChartAttributes = (peer) => {
let max = 0;
peer.egress.forEach(({value}) => {
if (value > max) {
max = value;
}
});
setMaxEgress(peer, max);
};
// inserter is a state updater function for the main component, which handles the peers.
export const inserter = (sampleLimit: number) => (update: NetworkType, prev: NetworkType) => {
// The first message contains the metered peer history.
if (update.peers && update.peers.bundles) {
prev.peers = update.peers;
Object.values(prev.peers.bundles).forEach((bundle) => {
if (bundle.knownPeers) {
Object.values(bundle.knownPeers).forEach((peer) => {
if (!peer.maxIngress) {
setIngressChartAttributes(peer);
}
if (!peer.maxEgress) {
setEgressChartAttributes(peer);
}
});
}
});
}
if (Array.isArray(update.diff)) {
update.diff.forEach((event: PeerEvent) => {
if (!event.ip) {
console.error('Peer event without IP', event);
return;
}
switch (event.remove) {
case 'bundle': {
delete prev.peers.bundles[event.ip];
return;
}
case 'known': {
if (!event.id) {
console.error('Remove known peer event without ID', event.ip);
return;
}
const bundle = prev.peers.bundles[event.ip];
if (!bundle || !bundle.knownPeers || !bundle.knownPeers[event.id]) {
console.error('No known peer to remove', event.ip, event.id);
return;
}
delete bundle.knownPeers[event.id];
return;
}
case 'attempt': {
const bundle = prev.peers.bundles[event.ip];
if (!bundle || !Array.isArray(bundle.attempts) || bundle.attempts.length < 1) {
console.error('No unknown peer to remove', event.ip);
return;
}
bundle.attempts.splice(0, 1);
return;
}
}
if (!prev.peers.bundles[event.ip]) {
prev.peers.bundles[event.ip] = {
location: {
country: '',
city: '',
latitude: 0,
longitude: 0,
},
knownPeers: {},
attempts: [],
};
}
const bundle = prev.peers.bundles[event.ip];
if (event.location) {
bundle.location = event.location;
return;
}
if (!event.id) {
if (!bundle.attempts) {
bundle.attempts = [];
}
bundle.attempts.push({
connected: event.connected,
disconnected: event.disconnected,
});
return;
}
if (!bundle.knownPeers) {
bundle.knownPeers = {};
}
if (!bundle.knownPeers[event.id]) {
bundle.knownPeers[event.id] = {
connected: [],
disconnected: [],
ingress: [],
egress: [],
active: false,
};
}
const peer = bundle.knownPeers[event.id];
if (!peer.maxIngress) {
setIngressChartAttributes(peer);
}
if (!peer.maxEgress) {
setEgressChartAttributes(peer);
}
if (event.connected) {
if (!peer.connected) {
console.warn('peer.connected should exist');
peer.connected = [];
}
peer.connected.push(event.connected);
}
if (event.disconnected) {
if (!peer.disconnected) {
console.warn('peer.disconnected should exist');
peer.disconnected = [];
}
peer.disconnected.push(event.disconnected);
}
switch (event.activity) {
case 'active':
peer.active = true;
break;
case 'inactive':
peer.active = false;
break;
}
if (Array.isArray(event.ingress) && Array.isArray(event.egress)) {
if (event.ingress.length !== event.egress.length) {
console.error('Different traffic sample length', event);
return;
}
// Check if there is a new maximum value, and reset the colors in case.
let maxIngress = peer.maxIngress;
event.ingress.forEach(({value}) => {
if (value > maxIngress) {
maxIngress = value;
}
});
if (maxIngress > peer.maxIngress) {
setMaxIngress(peer, maxIngress);
}
// Push the new values.
peer.ingress.splice(peer.ingress.length, 0, ...event.ingress);
const ingressDiff = peer.ingress.length - sampleLimit;
if (ingressDiff > 0) {
// Check if the maximum value is in the beginning.
let i = 0;
while (i < ingressDiff && peer.ingress[i].value < peer.maxIngress) {
i++;
}
// Remove the old values from the beginning.
peer.ingress.splice(0, ingressDiff);
if (i < ingressDiff) {
// Reset the colors if the maximum value leaves the chart.
setIngressChartAttributes(peer);
}
}
// Check if there is a new maximum value, and reset the colors in case.
let maxEgress = peer.maxEgress;
event.egress.forEach(({value}) => {
if (value > maxEgress) {
maxEgress = value;
}
});
if (maxEgress > peer.maxEgress) {
setMaxEgress(peer, maxEgress);
}
// Push the new values.
peer.egress.splice(peer.egress.length, 0, ...event.egress);
const egressDiff = peer.egress.length - sampleLimit;
if (egressDiff > 0) {
// Check if the maximum value is in the beginning.
let i = 0;
while (i < egressDiff && peer.egress[i].value < peer.maxEgress) {
i++;
}
// Remove the old values from the beginning.
peer.egress.splice(0, egressDiff);
if (i < egressDiff) {
// Reset the colors if the maximum value leaves the chart.
setEgressChartAttributes(peer);
}
}
}
});
}
return prev;
};
// styles contains the constant styles of the component.
const styles = {
tableHead: {
height: 'auto',
},
tableRow: {
height: 'auto',
},
tableCell: {
paddingTop: 0,
paddingRight: 5,
paddingBottom: 0,
paddingLeft: 5,
border: 'none',
},
};
export type Props = {
container: Object,
content: NetworkType,
shouldUpdate: Object,
};
type State = {};
// Network renders the network page.
class Network extends Component<Props, State> {
componentDidMount() {
const {container} = this.props;
if (typeof container === 'undefined') {
return;
}
container.scrollTop = 0;
}
formatTime = (t: string) => {
const time = new Date(t);
if (isNaN(time)) {
return '';
}
const month = `0${time.getMonth() + 1}`.slice(-2);
const date = `0${time.getDate()}`.slice(-2);
const hours = `0${time.getHours()}`.slice(-2);
const minutes = `0${time.getMinutes()}`.slice(-2);
const seconds = `0${time.getSeconds()}`.slice(-2);
return `${month}/${date}/${hours}:${minutes}:${seconds}`;
};
copyToClipboard = (id) => (event) => {
event.preventDefault();
navigator.clipboard.writeText(id).then(() => {}, () => {
console.error("Failed to copy node id", id);
});
};
peerTableRow = (ip, id, bundle, peer) => {
const ingressValues = peer.ingress.map(({value}) => ({ingress: value || 0.001}));
const egressValues = peer.egress.map(({value}) => ({egress: -value || -0.001}));
return (
<TableRow key={`known_${ip}_${id}`} style={styles.tableRow}>
<TableCell style={styles.tableCell}>
{peer.active
? <FontAwesomeIcon icon={fasCircle} color='green' />
: <FontAwesomeIcon icon={farCircle} style={commonStyles.light} />
}
</TableCell>
<TableCell style={{fontFamily: 'monospace', cursor: 'copy', ...styles.tableCell, ...commonStyles.light}} onClick={this.copyToClipboard(id)}>
{id.substring(0, 10)}
</TableCell>
<TableCell style={styles.tableCell}>
{bundle.location ? (() => {
const l = bundle.location;
return `${l.country ? l.country : ''}${l.city ? `/${l.city}` : ''}`;
})() : ''}
</TableCell>
<TableCell style={styles.tableCell}>
<AreaChart
width={trafficChartWidth}
height={trafficChartHeight}
data={ingressValues}
margin={{top: 5, right: 5, bottom: 0, left: 5}}
syncId={`peerIngress_${ip}_${id}`}
>
<defs>
<linearGradient id={`ingressGradient_${ip}_${id}`} x1='0' y1='1' x2='0' y2='0'>
{peer.ingressGradient
&& peer.ingressGradient.map(({offset, color}, i) => (
<stop
key={`ingressStop_${ip}_${id}_${i}`}
offset={`${offset}%`}
stopColor={color}
/>
))}
</linearGradient>
</defs>
<Tooltip cursor={false} content={<CustomTooltip tooltip={bytePlotter('Download')} />} />
<YAxis hide scale='sqrt' domain={[0.001, dataMax => Math.max(dataMax, 0)]} />
<Area
dataKey='ingress'
isAnimationActive={false}
type='monotone'
fill={`url(#ingressGradient_${ip}_${id})`}
stroke={peer.ingressGradient[peer.ingressGradient.length - 1].color}
strokeWidth={chartStrokeWidth}
/>
</AreaChart>
<AreaChart
width={trafficChartWidth}
height={trafficChartHeight}
data={egressValues}
margin={{top: 0, right: 5, bottom: 5, left: 5}}
syncId={`peerIngress_${ip}_${id}`}
>
<defs>
<linearGradient id={`egressGradient_${ip}_${id}`} x1='0' y1='1' x2='0' y2='0'>
{peer.egressGradient
&& peer.egressGradient.map(({offset, color}, i) => (
<stop
key={`egressStop_${ip}_${id}_${i}`}
offset={`${offset}%`}
stopColor={color}
/>
))}
</linearGradient>
</defs>
<Tooltip cursor={false} content={<CustomTooltip tooltip={bytePlotter('Upload', multiplier(-1))} />} />
<YAxis hide scale='sqrt' domain={[dataMin => Math.min(dataMin, 0), -0.001]} />
<Area
dataKey='egress'
isAnimationActive={false}
type='monotone'
fill={`url(#egressGradient_${ip}_${id})`}
stroke={peer.egressGradient[0].color}
strokeWidth={chartStrokeWidth}
/>
</AreaChart>
</TableCell>
</TableRow>
);
};
render() {
return (
<Grid container direction='row' justify='space-between'>
<Grid item>
<Table>
<TableHead style={styles.tableHead}>
<TableRow style={styles.tableRow}>
<TableCell style={styles.tableCell} />
<TableCell style={styles.tableCell}>Node ID</TableCell>
<TableCell style={styles.tableCell}>Location</TableCell>
<TableCell style={styles.tableCell}>Traffic</TableCell>
</TableRow>
</TableHead>
<TableBody>
{Object.entries(this.props.content.peers.bundles).map(([ip, bundle]) => {
if (!bundle.knownPeers || Object.keys(bundle.knownPeers).length < 1) {
return null;
}
return Object.entries(bundle.knownPeers).map(([id, peer]) => {
if (peer.active === false) {
return null;
}
return this.peerTableRow(ip, id, bundle, peer);
});
})}
</TableBody>
<TableBody>
{Object.entries(this.props.content.peers.bundles).map(([ip, bundle]) => {
if (!bundle.knownPeers || Object.keys(bundle.knownPeers).length < 1) {
return null;
}
return Object.entries(bundle.knownPeers).map(([id, peer]) => {
if (peer.active === true) {
return null;
}
return this.peerTableRow(ip, id, bundle, peer);
});
})}
</TableBody>
</Table>
</Grid>
<Grid item>
<Typography variant='subtitle1' gutterBottom>
Connection attempts
</Typography>
<Table>
<TableHead style={styles.tableHead}>
<TableRow style={styles.tableRow}>
<TableCell style={styles.tableCell}>IP</TableCell>
<TableCell style={styles.tableCell}>Location</TableCell>
<TableCell style={styles.tableCell}>Nr</TableCell>
</TableRow>
</TableHead>
<TableBody>
{Object.entries(this.props.content.peers.bundles).map(([ip, bundle]) => {
if (!bundle.attempts || bundle.attempts.length < 1) {
return null;
}
return (
<TableRow key={`attempt_${ip}`} style={styles.tableRow}>
<TableCell style={styles.tableCell}>{ip}</TableCell>
<TableCell style={styles.tableCell}>
{bundle.location ? (() => {
const l = bundle.location;
return `${l.country ? l.country : ''}${l.city ? `/${l.city}` : ''}`;
})() : ''}
</TableCell>
<TableCell style={styles.tableCell}>
{Object.values(bundle.attempts).length}
</TableCell>
</TableRow>
);
})}
</TableBody>
</Table>
</Grid>
</Grid>
);
}
}
export default Network;

20
dashboard/assets/components/SideBar.jsx
View File

@ -18,11 +18,14 @@
import React, {Component} from 'react';
import withStyles from 'material-ui/styles/withStyles';
import List, {ListItem, ListItemIcon, ListItemText} from 'material-ui/List';
import Icon from 'material-ui/Icon';
import withStyles from '@material-ui/core/styles/withStyles';
import List from '@material-ui/core/List';
import ListItem from '@material-ui/core/ListItem';
import ListItemIcon from '@material-ui/core/ListItemIcon';
import ListItemText from '@material-ui/core/ListItemText';
import Icon from '@material-ui/core/Icon';
import Transition from 'react-transition-group/Transition';
import {Icon as FontAwesome} from 'react-fa';
import {FontAwesomeIcon} from '@fortawesome/react-fontawesome';
import {MENU, DURATION} from '../common';
@ -48,6 +51,7 @@ const themeStyles = theme => ({
},
icon: {
fontSize: theme.spacing.unit * 3,
overflow: 'unset',
},
});
@ -57,9 +61,11 @@ export type Props = {
changeContent: string => void,
};
type State = {}
// SideBar renders the sidebar of the dashboard.
class SideBar extends Component<Props> {
shouldComponentUpdate(nextProps) {
class SideBar extends Component<Props, State> {
shouldComponentUpdate(nextProps: Readonly<Props>, nextState: Readonly<State>, nextContext: any) {
return nextProps.opened !== this.props.opened;
}
@ -78,7 +84,7 @@ class SideBar extends Component<Props> {
<ListItem button key={menu.id} onClick={this.clickOn(menu.id)} className={classes.listItem}>
<ListItemIcon>
<Icon className={classes.icon}>
<FontAwesome name={menu.icon} />
<FontAwesomeIcon icon={menu.icon} />
</Icon>
</ListItemIcon>
<ListItemText

12
dashboard/assets/fa-only-woff-loader.js
View File

@ -16,10 +16,8 @@
// fa-only-woff-loader removes the .eot, .ttf, .svg dependencies of the FontAwesome library,
// because they produce unused extra blobs.
module.exports = function(content) {
return content
.replace(/src.*url(?!.*url.*(\.eot)).*(\.eot)[^;]*;/,'')
.replace(/url(?!.*url.*(\.eot)).*(\.eot)[^,]*,/,'')
.replace(/url(?!.*url.*(\.ttf)).*(\.ttf)[^,]*,/,'')
.replace(/,[^,]*url(?!.*url.*(\.svg)).*(\.svg)[^;]*;/,';');
};
module.exports = content => content
.replace(/src.*url(?!.*url.*(\.eot)).*(\.eot)[^;]*;/, '')
.replace(/url(?!.*url.*(\.eot)).*(\.eot)[^,]*,/, '')
.replace(/url(?!.*url.*(\.ttf)).*(\.ttf)[^,]*,/, '')
.replace(/,[^,]*url(?!.*url.*(\.svg)).*(\.svg)[^;]*;/, ';');

2
dashboard/assets/index.html
View File

@ -21,6 +21,6 @@
</head>
<body style="height: 100%; margin: 0">
<div id="dashboard" style="height: 100%"></div>
<script src="bundle.js"></script>
<script type="text/javascript" src="bundle.js"></script>
</body>
</html>

7
dashboard/assets/index.jsx
View File

@ -19,12 +19,15 @@
import React from 'react';
import {render} from 'react-dom';
import MuiThemeProvider from 'material-ui/styles/MuiThemeProvider';
import createMuiTheme from 'material-ui/styles/createMuiTheme';
import MuiThemeProvider from '@material-ui/core/styles/MuiThemeProvider';
import createMuiTheme from '@material-ui/core/styles/createMuiTheme';
import Dashboard from './components/Dashboard';
const theme: Object = createMuiTheme({
// typography: {
// useNextVariants: true,
// },
palette: {
type: 'dark',
},

97
dashboard/assets/package.json
View File

@ -1,48 +1,65 @@
{
"private": true,
"dependencies": {
"babel-core": "^6.26.0",
"babel-eslint": "^8.2.1",
"babel-loader": "^7.1.2",
"babel-plugin-transform-class-properties": "^6.24.1",
"babel-plugin-transform-decorators-legacy": "^1.3.4",
"babel-plugin-transform-flow-strip-types": "^6.22.0",
"babel-plugin-transform-runtime": "^6.23.0",
"babel-preset-env": "^1.6.1",
"babel-preset-react": "^6.24.1",
"babel-preset-stage-0": "^6.24.1",
"babel-runtime": "^6.26.0",
"classnames": "^2.2.5",
"css-loader": "^0.28.9",
"@babel/core": "7.3.4",
"@babel/plugin-proposal-class-properties": "7.3.4",
"@babel/plugin-proposal-function-bind": "7.2.0",
"@babel/plugin-transform-flow-strip-types": "7.3.4",
"@babel/preset-env": "7.3.4",
"@babel/preset-react": "^7.0.0",
"@babel/preset-stage-0": "^7.0.0",
"@fortawesome/fontawesome-free-regular": "^5.0.13",
"@fortawesome/fontawesome-svg-core": "^1.2.15",
"@fortawesome/free-regular-svg-icons": "^5.7.2",
"@fortawesome/free-solid-svg-icons": "^5.7.2",
"@fortawesome/react-fontawesome": "^0.1.4",
"@material-ui/core": "3.9.2",
"@material-ui/icons": "3.0.2",
"babel-eslint": "10.0.1",
"babel-loader": "8.0.5",
"classnames": "^2.2.6",
"color-convert": "^2.0.0",
"css-loader": "2.1.1",
"escape-html": "^1.0.3",
"eslint": "^4.16.0",
"eslint-config-airbnb": "^16.1.0",
"eslint-loader": "^2.0.0",
"eslint-plugin-flowtype": "^2.41.0",
"eslint-plugin-import": "^2.8.0",
"eslint-plugin-jsx-a11y": "^6.0.3",
"eslint-plugin-react": "^7.5.1",
"file-loader": "^1.1.6",
"flow-bin": "^0.63.1",
"flow-bin-loader": "^1.0.2",
"flow-typed": "^2.2.3",
"material-ui": "^1.0.0-beta.30",
"material-ui-icons": "^1.0.0-beta.17",
"eslint": "5.15.1",
"eslint-config-airbnb": "^17.0.0",
"eslint-loader": "2.1.2",
"eslint-plugin-flowtype": "3.4.2",
"eslint-plugin-import": "2.16.0",
"eslint-plugin-jsx-a11y": "6.2.1",
"eslint-plugin-node": "8.0.1",
"eslint-plugin-promise": "4.0.1",
"eslint-plugin-react": "7.12.4",
"file-loader": "3.0.1",
"flow-bin": "0.94.0",
"flow-bin-loader": "^1.0.3",
"flow-typed": "^2.5.1",
"js-beautify": "1.9.0",
"path": "^0.12.7",
"react": "^16.2.0",
"react-dom": "^16.2.0",
"react-fa": "^5.0.0",
"react-transition-group": "^2.2.1",
"recharts": "^1.0.0-beta.9",
"style-loader": "^0.19.1",
"react": "16.8.4",
"react-dom": "16.8.4",
"react-hot-loader": "4.8.0",
"react-transition-group": "2.6.0",
"recharts": "1.5.0",
"style-loader": "0.23.1",
"terser-webpack-plugin": "^1.2.3",
"url": "^0.11.0",
"url-loader": "^0.6.2",
"webpack": "^3.10.0",
"webpack-dev-server": "^2.11.1"
"url-loader": "1.1.2",
"webpack": "4.29.6",
"webpack-cli": "3.2.3",
"webpack-dashboard": "3.0.0",
"webpack-dev-server": "3.2.1",
"webpack-merge": "4.2.1"
},
"scripts": {
"build": "NODE_ENV=production webpack",
"stats": "webpack --profile --json > stats.json",
"dev": "webpack-dev-server --port 8081",
"flow": "flow-typed install"
}
"build": "webpack --config webpack.config.prod.js",
"stats": "webpack --config webpack.config.prod.js --profile --json > stats.json",
"dev": "webpack-dev-server --open --config webpack.config.dev.js",
"dash": "webpack-dashboard -- yarn dev",
"install-flow": "flow-typed install",
"flow": "flow status --show-all-errors",
"eslint": "eslint **/*"
},
"sideEffects": false,
"license": "LGPL-3.0-or-later"
}

46
dashboard/assets/types/content.jsx
View File

@ -29,7 +29,6 @@ export type Content = {
export type ChartEntries = Array<ChartEntry>;
export type ChartEntry = {
time: Date,
value: number,
};
@ -51,7 +50,50 @@ export type TxPool = {
};
export type Network = {
/* TODO (kurkomisi) */
peers: Peers,
diff: Array<PeerEvent>
};
export type PeerEvent = {
ip: string,
id: string,
remove: string,
location: GeoLocation,
connected: Date,
disconnected: Date,
ingress: ChartEntries,
egress: ChartEntries,
activity: string,
};
export type Peers = {
bundles: {[string]: PeerBundle},
};
export type PeerBundle = {
location: GeoLocation,
knownPeers: {[string]: KnownPeer},
attempts: Array<UnknownPeer>,
};
export type KnownPeer = {
connected: Array<Date>,
disconnected: Array<Date>,
ingress: Array<ChartEntries>,
egress: Array<ChartEntries>,
active: boolean,
};
export type UnknownPeer = {
connected: Date,
disconnected: Date,
};
export type GeoLocation = {
country: string,
city: string,
latitude: number,
longitude: number,
};
export type System = {

70
dashboard/assets/webpack.config.js → dashboard/assets/webpack.config.common.js
View File

@ -1,4 +1,4 @@
// Copyright 2017 The go-ethereum Authors
// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
@ -14,28 +14,25 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
const webpack = require('webpack');
const path = require('path');
module.exports = {
target: 'web',
entry: {
bundle: './index',
},
output: {
filename: '[name].js',
path: path.resolve(__dirname, ''),
sourceMapFilename: '[file].map',
},
resolve: {
modules: [
'node_modules',
path.resolve(__dirname, 'components'), // import './components/Component' -> import 'Component'
],
extensions: ['.js', '.jsx'],
},
entry: './index',
output: {
path: path.resolve(__dirname, ''),
filename: 'bundle.js',
},
plugins: [
new webpack.optimize.UglifyJsPlugin({
comments: false,
mangle: false,
beautify: true,
}),
new webpack.DefinePlugin({
PROD: process.env.NODE_ENV === 'production',
}),
],
module: {
rules: [
{
@ -45,27 +42,38 @@ module.exports = {
{
loader: 'babel-loader',
options: {
plugins: [ // order: from top to bottom
// 'transform-decorators-legacy', // @withStyles, @withTheme
'transform-class-properties', // static defaultProps
'transform-flow-strip-types',
],
presets: [ // order: from bottom to top
'env',
'react',
'stage-0',
'@babel/env',
'@babel/react',
],
plugins: [ // order: from top to bottom
'@babel/proposal-function-bind', // instead of stage 0
'@babel/proposal-class-properties', // static defaultProps
'@babel/transform-flow-strip-types',
'react-hot-loader/babel',
],
},
},
// 'eslint-loader', // show errors not only in the editor, but also in the console
// 'eslint-loader', // show errors in the console
],
},
{
test: /font-awesome\.css$/,
use: [
'style-loader',
'css-loader',
path.resolve(__dirname, './fa-only-woff-loader.js'),
test: /\.css$/,
oneOf: [
{
test: /font-awesome/,
use: [
'style-loader',
'css-loader',
path.resolve(__dirname, './fa-only-woff-loader.js'),
],
},
{
use: [
'style-loader',
'css-loader',
],
},
],
},
{

35
dashboard/assets/webpack.config.dev.js Normal file
View File

@ -0,0 +1,35 @@
// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
const webpack = require('webpack');
const merge = require('webpack-merge');
const WebpackDashboard = require('webpack-dashboard/plugin');
const common = require('./webpack.config.common.js');
module.exports = merge(common, {
mode: 'development',
plugins: [
new WebpackDashboard(),
new webpack.HotModuleReplacementPlugin(),
],
// devtool: 'eval',
devtool: 'source-map',
devServer: {
port: 8081,
hot: true,
compress: true,
},
});

41
dashboard/assets/webpack.config.prod.js Normal file
View File

@ -0,0 +1,41 @@
// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
const TerserPlugin = require('terser-webpack-plugin');
const merge = require('webpack-merge');
const common = require('./webpack.config.common.js');
module.exports = merge(common, {
mode: 'production',
devtool: 'source-map',
optimization: {
minimize: true,
namedModules: true, // Module names instead of numbers - resolves the large diff problem.
minimizer: [
new TerserPlugin({
cache: true,
parallel: true,
sourceMap: true,
terserOptions: {
output: {
comments: false,
beautify: true,
},
},
}),
],
},
});

5848
dashboard/assets/yarn.lock
View File

File diff suppressed because it is too large Load Diff

215
dashboard/dashboard.go
View File

@ -18,8 +18,10 @@ package dashboard
//go:generate yarn --cwd ./assets install
//go:generate yarn --cwd ./assets build
//go:generate go-bindata -nometadata -o assets.go -prefix assets -nocompress -pkg dashboard assets/index.html assets/bundle.js
//go:generate yarn --cwd ./assets js-beautify -f bundle.js.map -r -w 1
//go:generate go-bindata -nometadata -o assets.go -prefix assets -nocompress -pkg dashboard assets/index.html assets/bundle.js assets/bundle.js.map
//go:generate sh -c "sed 's#var _bundleJs#//nolint:misspell\\\n&#' assets.go > assets.go.tmp && mv assets.go.tmp assets.go"
//go:generate sh -c "sed 's#var _bundleJsMap#//nolint:misspell\\\n&#' assets.go > assets.go.tmp && mv assets.go.tmp assets.go"
//go:generate sh -c "sed 's#var _indexHtml#//nolint:misspell\\\n&#' assets.go > assets.go.tmp && mv assets.go.tmp assets.go"
//go:generate gofmt -w -s assets.go
@ -27,16 +29,13 @@ import (
"fmt"
"net"
"net/http"
"runtime"
"sync"
"sync/atomic"
"time"
"io"
"github.com/elastic/gosigar"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/metrics"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rpc"
@ -45,31 +44,29 @@ import (
)
const (
activeMemorySampleLimit = 200 // Maximum number of active memory data samples
virtualMemorySampleLimit = 200 // Maximum number of virtual memory data samples
networkIngressSampleLimit = 200 // Maximum number of network ingress data samples
networkEgressSampleLimit = 200 // Maximum number of network egress data samples
processCPUSampleLimit = 200 // Maximum number of process cpu data samples
systemCPUSampleLimit = 200 // Maximum number of system cpu data samples
diskReadSampleLimit = 200 // Maximum number of disk read data samples
diskWriteSampleLimit = 200 // Maximum number of disk write data samples
sampleLimit = 200 // Maximum number of data samples
)
var nextID uint32 // Next connection id
// Dashboard contains the dashboard internals.
type Dashboard struct {
config *Config
config *Config // Configuration values for the dashboard
listener net.Listener
conns map[uint32]*client // Currently live websocket connections
history *Message
lock sync.RWMutex // Lock protecting the dashboard's internals
listener net.Listener // Network listener listening for dashboard clients
conns map[uint32]*client // Currently live websocket connections
nextConnID uint32 // Next connection id
logdir string
history *Message // Stored historical data
lock sync.Mutex // Lock protecting the dashboard's internals
sysLock sync.RWMutex // Lock protecting the stored system data
peerLock sync.RWMutex // Lock protecting the stored peer data
logLock sync.RWMutex // Lock protecting the stored log data
geodb *geoDB // geoip database instance for IP to geographical information conversions
logdir string // Directory containing the log files
quit chan chan error // Channel used for graceful exit
wg sync.WaitGroup
wg sync.WaitGroup // Wait group used to close the data collector threads
}
// client represents active websocket connection with a remote browser.
@ -96,14 +93,14 @@ func New(config *Config, commit string, logdir string) *Dashboard {
Version: fmt.Sprintf("v%d.%d.%d%s", params.VersionMajor, params.VersionMinor, params.VersionPatch, versionMeta),
},
System: &SystemMessage{
ActiveMemory: emptyChartEntries(now, activeMemorySampleLimit, config.Refresh),
VirtualMemory: emptyChartEntries(now, virtualMemorySampleLimit, config.Refresh),
NetworkIngress: emptyChartEntries(now, networkIngressSampleLimit, config.Refresh),
NetworkEgress: emptyChartEntries(now, networkEgressSampleLimit, config.Refresh),
ProcessCPU: emptyChartEntries(now, processCPUSampleLimit, config.Refresh),
SystemCPU: emptyChartEntries(now, systemCPUSampleLimit, config.Refresh),
DiskRead: emptyChartEntries(now, diskReadSampleLimit, config.Refresh),
DiskWrite: emptyChartEntries(now, diskWriteSampleLimit, config.Refresh),
ActiveMemory: emptyChartEntries(now, sampleLimit),
VirtualMemory: emptyChartEntries(now, sampleLimit),
NetworkIngress: emptyChartEntries(now, sampleLimit),
NetworkEgress: emptyChartEntries(now, sampleLimit),
ProcessCPU: emptyChartEntries(now, sampleLimit),
SystemCPU: emptyChartEntries(now, sampleLimit),
DiskRead: emptyChartEntries(now, sampleLimit),
DiskWrite: emptyChartEntries(now, sampleLimit),
},
},
logdir: logdir,
@ -111,12 +108,10 @@ func New(config *Config, commit string, logdir string) *Dashboard {
}
// emptyChartEntries returns a ChartEntry array containing limit number of empty samples.
func emptyChartEntries(t time.Time, limit int, refresh time.Duration) ChartEntries {
func emptyChartEntries(t time.Time, limit int) ChartEntries {
ce := make(ChartEntries, limit)
for i := 0; i < limit; i++ {
ce[i] = &ChartEntry{
Time: t.Add(-time.Duration(i) * refresh),
}
ce[i] = new(ChartEntry)
}
return ce
}
@ -132,9 +127,10 @@ func (db *Dashboard) APIs() []rpc.API { return nil }
func (db *Dashboard) Start(server *p2p.Server) error {
log.Info("Starting dashboard")
db.wg.Add(2)
go db.collectData()
db.wg.Add(3)
go db.collectSystemData()
go db.streamLogs()
go db.collectPeerData()
http.HandleFunc("/", db.webHandler)
http.Handle("/api", websocket.Handler(db.apiHandler))
@ -160,7 +156,7 @@ func (db *Dashboard) Stop() error {
}
// Close the collectors.
errc := make(chan error, 1)
for i := 0; i < 2; i++ {
for i := 0; i < 3; i++ {
db.quit <- errc
if err := <-errc; err != nil {
errs = append(errs, err)
@ -206,7 +202,7 @@ func (db *Dashboard) webHandler(w http.ResponseWriter, r *http.Request) {
// apiHandler handles requests for the dashboard.
func (db *Dashboard) apiHandler(conn *websocket.Conn) {
id := atomic.AddUint32(&nextID, 1)
id := atomic.AddUint32(&db.nextConnID, 1)
client := &client{
conn: conn,
msg: make(chan *Message, 128),
@ -233,10 +229,21 @@ func (db *Dashboard) apiHandler(conn *websocket.Conn) {
}
}()
db.lock.Lock()
// Send the past data.
client.msg <- deepcopy.Copy(db.history).(*Message)
db.sysLock.RLock()
db.peerLock.RLock()
db.logLock.RLock()
h := deepcopy.Copy(db.history).(*Message)
db.sysLock.RUnlock()
db.peerLock.RUnlock()
db.logLock.RUnlock()
client.msg <- h
// Start tracking the connection and drop at connection loss.
db.lock.Lock()
db.conns[id] = client
db.lock.Unlock()
defer func() {
@ -259,136 +266,6 @@ func (db *Dashboard) apiHandler(conn *websocket.Conn) {
}
}
// meterCollector returns a function, which retrieves a specific meter.
func meterCollector(name string) func() int64 {
if metric := metrics.DefaultRegistry.Get(name); metric != nil {
m := metric.(metrics.Meter)
return func() int64 {
return m.Count()
}
}
return func() int64 {
return 0
}
}
// collectData collects the required data to plot on the dashboard.
func (db *Dashboard) collectData() {
defer db.wg.Done()
systemCPUUsage := gosigar.Cpu{}
systemCPUUsage.Get()
var (
mem runtime.MemStats
collectNetworkIngress = meterCollector("p2p/InboundTraffic")
collectNetworkEgress = meterCollector("p2p/OutboundTraffic")
collectDiskRead = meterCollector("eth/db/chaindata/disk/read")
collectDiskWrite = meterCollector("eth/db/chaindata/disk/write")
prevNetworkIngress = collectNetworkIngress()
prevNetworkEgress = collectNetworkEgress()
prevProcessCPUTime = getProcessCPUTime()
prevSystemCPUUsage = systemCPUUsage
prevDiskRead = collectDiskRead()
prevDiskWrite = collectDiskWrite()
frequency = float64(db.config.Refresh / time.Second)
numCPU = float64(runtime.NumCPU())
)
for {
select {
case errc := <-db.quit:
errc <- nil
return
case <-time.After(db.config.Refresh):
systemCPUUsage.Get()
var (
curNetworkIngress = collectNetworkIngress()
curNetworkEgress = collectNetworkEgress()
curProcessCPUTime = getProcessCPUTime()
curSystemCPUUsage = systemCPUUsage
curDiskRead = collectDiskRead()
curDiskWrite = collectDiskWrite()
deltaNetworkIngress = float64(curNetworkIngress - prevNetworkIngress)
deltaNetworkEgress = float64(curNetworkEgress - prevNetworkEgress)
deltaProcessCPUTime = curProcessCPUTime - prevProcessCPUTime
deltaSystemCPUUsage = curSystemCPUUsage.Delta(prevSystemCPUUsage)
deltaDiskRead = curDiskRead - prevDiskRead
deltaDiskWrite = curDiskWrite - prevDiskWrite
)
prevNetworkIngress = curNetworkIngress
prevNetworkEgress = curNetworkEgress
prevProcessCPUTime = curProcessCPUTime
prevSystemCPUUsage = curSystemCPUUsage
prevDiskRead = curDiskRead
prevDiskWrite = curDiskWrite
now := time.Now()
runtime.ReadMemStats(&mem)
activeMemory := &ChartEntry{
Time: now,
Value: float64(mem.Alloc) / frequency,
}
virtualMemory := &ChartEntry{
Time: now,
Value: float64(mem.Sys) / frequency,
}
networkIngress := &ChartEntry{
Time: now,
Value: deltaNetworkIngress / frequency,
}
networkEgress := &ChartEntry{
Time: now,
Value: deltaNetworkEgress / frequency,
}
processCPU := &ChartEntry{
Time: now,
Value: deltaProcessCPUTime / frequency / numCPU * 100,
}
systemCPU := &ChartEntry{
Time: now,
Value: float64(deltaSystemCPUUsage.Sys+deltaSystemCPUUsage.User) / frequency / numCPU,
}
diskRead := &ChartEntry{
Time: now,
Value: float64(deltaDiskRead) / frequency,
}
diskWrite := &ChartEntry{
Time: now,
Value: float64(deltaDiskWrite) / frequency,
}
sys := db.history.System
db.lock.Lock()
sys.ActiveMemory = append(sys.ActiveMemory[1:], activeMemory)
sys.VirtualMemory = append(sys.VirtualMemory[1:], virtualMemory)
sys.NetworkIngress = append(sys.NetworkIngress[1:], networkIngress)
sys.NetworkEgress = append(sys.NetworkEgress[1:], networkEgress)
sys.ProcessCPU = append(sys.ProcessCPU[1:], processCPU)
sys.SystemCPU = append(sys.SystemCPU[1:], systemCPU)
sys.DiskRead = append(sys.DiskRead[1:], diskRead)
sys.DiskWrite = append(sys.DiskWrite[1:], diskWrite)
db.lock.Unlock()
db.sendToAll(&Message{
System: &SystemMessage{
ActiveMemory: ChartEntries{activeMemory},
VirtualMemory: ChartEntries{virtualMemory},
NetworkIngress: ChartEntries{networkIngress},
NetworkEgress: ChartEntries{networkEgress},
ProcessCPU: ChartEntries{processCPU},
SystemCPU: ChartEntries{systemCPU},
DiskRead: ChartEntries{diskRead},
DiskWrite: ChartEntries{diskWrite},
},
})
}
}
}
// sendToAll sends the given message to the active dashboards.
func (db *Dashboard) sendToAll(msg *Message) {
db.lock.Lock()

98
dashboard/geoip.go Normal file
View File

@ -0,0 +1,98 @@
// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package dashboard
import (
"net"
"time"
"github.com/apilayer/freegeoip"
)
// geoDBInfo contains all the geographical information we could extract based on an IP
// address.
type geoDBInfo struct {
Country struct {
Names struct {
English string `maxminddb:"en" json:"en,omitempty"`
} `maxminddb:"names" json:"names,omitempty"`
} `maxminddb:"country" json:"country,omitempty"`
City struct {
Names struct {
English string `maxminddb:"en" json:"en,omitempty"`
} `maxminddb:"names" json:"names,omitempty"`
} `maxminddb:"city" json:"city,omitempty"`
Location struct {
Latitude float64 `maxminddb:"latitude" json:"latitude,omitempty"`
Longitude float64 `maxminddb:"longitude" json:"longitude,omitempty"`
} `maxminddb:"location" json:"location,omitempty"`
}
// geoLocation contains geographical information.
type geoLocation struct {
Country string `json:"country,omitempty"`
City string `json:"city,omitempty"`
Latitude float64 `json:"latitude,omitempty"`
Longitude float64 `json:"longitude,omitempty"`
}
// geoDB represents a geoip database that can be queried for IP to geographical
// information conversions.
type geoDB struct {
geodb *freegeoip.DB
}
// Open creates a new geoip database with an up-to-date database from the internet.
func openGeoDB() (*geoDB, error) {
// Initiate a geoip database to cross reference locations
db, err := freegeoip.OpenURL(freegeoip.MaxMindDB, 24*time.Hour, time.Hour)
if err != nil {
return nil, err
}
// Wait until the database is updated to the latest data
select {
case <-db.NotifyOpen():
case err := <-db.NotifyError():
return nil, err
}
// Assemble and return our custom wrapper
return &geoDB{geodb: db}, nil
}
// Close terminates the database background updater.
func (db *geoDB) close() error {
db.geodb.Close()
return nil
}
// Lookup converts an IP address to a geographical location.
func (db *geoDB) lookup(ip net.IP) *geoDBInfo {
result := new(geoDBInfo)
db.geodb.Lookup(ip, result)
return result
}
// Location retrieves the geographical location of the given IP address.
func (db *geoDB) location(ip string) *geoLocation {
location := db.lookup(net.ParseIP(ip))
return &geoLocation{
Country: location.Country.Names.English,
City: location.City.Names.English,
Latitude: location.Location.Latitude,
Longitude: location.Location.Longitude,
}
}

18
dashboard/log.go
View File

@ -94,13 +94,13 @@ func (db *Dashboard) handleLogRequest(r *LogsRequest, c *client) {
// The last file is continuously updated, and its chunks are streamed,
// so in order to avoid log record duplication on the client side, it is
// handled differently. Its actual content is always saved in the history.
db.lock.Lock()
db.logLock.RLock()
if db.history.Logs != nil {
c.msg <- &Message{
Logs: db.history.Logs,
Logs: deepcopy.Copy(db.history.Logs).(*LogsMessage),
}
}
db.lock.Unlock()
db.logLock.RUnlock()
return
case fileNames[idx] == r.Name:
idx++
@ -174,7 +174,7 @@ func (db *Dashboard) streamLogs() {
log.Warn("Problem with file", "name", opened.Name(), "err", err)
return
}
db.lock.Lock()
db.logLock.Lock()
db.history.Logs = &LogsMessage{
Source: &LogFile{
Name: fi.Name(),
@ -182,7 +182,7 @@ func (db *Dashboard) streamLogs() {
},
Chunk: emptyChunk,
}
db.lock.Unlock()
db.logLock.Unlock()
watcher := make(chan notify.EventInfo, 10)
if err := notify.Watch(db.logdir, watcher, notify.Create); err != nil {
@ -240,10 +240,10 @@ loop:
log.Warn("Problem with file", "name", opened.Name(), "err", err)
break loop
}
db.lock.Lock()
db.logLock.Lock()
db.history.Logs.Source.Name = fi.Name()
db.history.Logs.Chunk = emptyChunk
db.lock.Unlock()
db.logLock.Unlock()
case <-ticker.C: // Send log updates to the client.
if opened == nil {
log.Warn("The last log file is not opened")
@ -266,7 +266,7 @@ loop:
var l *LogsMessage
// Update the history.
db.lock.Lock()
db.logLock.Lock()
if bytes.Equal(db.history.Logs.Chunk, emptyChunk) {
db.history.Logs.Chunk = chunk
l = deepcopy.Copy(db.history.Logs).(*LogsMessage)
@ -278,7 +278,7 @@ loop:
db.history.Logs.Chunk = b
l = &LogsMessage{Chunk: chunk}
}
db.lock.Unlock()
db.logLock.Unlock()
db.sendToAll(&Message{Logs: l})
case errc = <-db.quit:

13
dashboard/message.go
View File

@ -18,7 +18,6 @@ package dashboard
import (
"encoding/json"
"time"
)
type Message struct {
@ -34,8 +33,7 @@ type Message struct {
type ChartEntries []*ChartEntry
type ChartEntry struct {
Time time.Time `json:"time,omitempty"`
Value float64 `json:"value,omitempty"`
Value float64 `json:"value"`
}
type GeneralMessage struct {
@ -55,10 +53,14 @@ type TxPoolMessage struct {
/* TODO (kurkomisi) */
}
// NetworkMessage contains information about the peers
// organized based on their IP address and node ID.
type NetworkMessage struct {
/* TODO (kurkomisi) */
Peers *peerContainer `json:"peers,omitempty"` // Peer tree.
Diff []*peerEvent `json:"diff,omitempty"` // Events that change the peer tree.
}
// SystemMessage contains the metered system data samples.
type SystemMessage struct {
ActiveMemory ChartEntries `json:"activeMemory,omitempty"`
VirtualMemory ChartEntries `json:"virtualMemory,omitempty"`
@ -70,7 +72,7 @@ type SystemMessage struct {
DiskWrite ChartEntries `json:"diskWrite,omitempty"`
}
// LogsMessage wraps up a log chunk. If Source isn't present, the chunk is a stream chunk.
// LogsMessage wraps up a log chunk. If 'Source' isn't present, the chunk is a stream chunk.
type LogsMessage struct {
Source *LogFile `json:"source,omitempty"` // Attributes of the log file.
Chunk json.RawMessage `json:"chunk"` // Contains log records.
@ -87,6 +89,7 @@ type Request struct {
Logs *LogsRequest `json:"logs,omitempty"`
}
// LogsRequest contains the attributes of the log file the client wants to receive.
type LogsRequest struct {
Name string `json:"name"` // The request handler searches for log file based on this file name.
Past bool `json:"past"` // Denotes whether the client wants the previous or the next file.

552
dashboard/peers.go Normal file
View File

@ -0,0 +1,552 @@
// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package dashboard
import (
"container/list"
"strings"
"time"
"github.com/ethereum/go-ethereum/metrics"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/p2p"
)
const (
eventBufferLimit = 128 // Maximum number of buffered peer events.
knownPeerLimit = 100 // Maximum number of stored peers, which successfully made the handshake.
attemptLimit = 200 // Maximum number of stored peers, which failed to make the handshake.
// eventLimit is the maximum number of the dashboard's custom peer events,
// that are collected between two metering period and sent to the clients
// as one message.
// TODO (kurkomisi): Limit the number of events.
eventLimit = knownPeerLimit << 2
)
// peerContainer contains information about the node's peers. This data structure
// maintains the metered peer data based on the different behaviours of the peers.
//
// Every peer has an IP address, and the peers that manage to make the handshake
// (known peers) have node IDs too. There can appear more peers with the same IP,
// therefore the peer container data structure is a tree consisting of a map of
// maps, where the first key groups the peers by IP, while the second one groups
// them by the node ID. The known peers can be active if their connection is still
// open, or inactive otherwise. The peers failing before the handshake (unknown
// peers) only have IP addresses, so their connection attempts are stored as part
// of the value of the outer map.
//
// Another criteria is to limit the number of metered peers so that
// they don't fill the memory. The selection order is based on the
// peers activity: the peers that are inactive for the longest time
// are thrown first. For the selection a fifo list is used which is
// linked to the bottom of the peer tree in a way that every activity
// of the peer pushes the peer to the end of the list, so the inactive
// ones come to the front. When a peer has some activity, it is removed
// from and reinserted into the list. When the length of the list reaches
// the limit, the first element is removed from the list, as well as from
// the tree.
//
// The active peers have priority over the inactive ones, therefore
// they have their own list. The separation makes it sure that the
// inactive peers are always removed before the active ones.
//
// The peers that don't manage to make handshake are not inserted into the list,
// only their connection attempts are appended to the array belonging to their IP.
// In order to keep the fifo principle, a super array contains the order of the
// attempts, and when the overall count reaches the limit, the earliest attempt is
// removed from the beginning of its array.
//
// This data structure makes it possible to marshal the peer
// history simply by passing it to the JSON marshaler.
type peerContainer struct {
// Bundles is the outer map using the peer's IP address as key.
Bundles map[string]*peerBundle `json:"bundles,omitempty"`
activeCount int // Number of the still connected peers
// inactivePeers contains the peers with closed connection in chronological order.
inactivePeers *list.List
// attemptOrder is the super array containing the IP addresses, from which
// the peers attempted to connect then failed before/during the handshake.
// Its values are appended in chronological order, which means that the
// oldest attempt is at the beginning of the array. When the first element
// is removed, the first element of the related bundle's attempt array is
// removed too, ensuring that always the latest attempts are stored.
attemptOrder []string
// geodb is the geoip database used to retrieve the peers' geographical location.
geodb *geoDB
}
// newPeerContainer returns a new instance of the peer container.
func newPeerContainer(geodb *geoDB) *peerContainer {
return &peerContainer{
Bundles: make(map[string]*peerBundle),
inactivePeers: list.New(),
attemptOrder: make([]string, 0, attemptLimit),
geodb: geodb,
}
}
// bundle inserts a new peer bundle into the map, if the peer belonging
// to the given IP wasn't metered so far. In this case retrieves the location of
// the IP address from the database and creates a corresponding peer event.
// Returns the bundle belonging to the given IP and the events occurring during
// the initialization.
func (pc *peerContainer) bundle(ip string) (*peerBundle, []*peerEvent) {
var events []*peerEvent
if _, ok := pc.Bundles[ip]; !ok {
location := pc.geodb.location(ip)
events = append(events, &peerEvent{
IP: ip,
Location: location,
})
pc.Bundles[ip] = &peerBundle{
Location: location,
KnownPeers: make(map[string]*knownPeer),
}
}
return pc.Bundles[ip], events
}
// extendKnown handles the events of the successfully connected peers.
// Returns the events occurring during the extension.
func (pc *peerContainer) extendKnown(event *peerEvent) []*peerEvent {
bundle, events := pc.bundle(event.IP)
peer, peerEvents := bundle.knownPeer(event.IP, event.ID)
events = append(events, peerEvents...)
// Append the connect and the disconnect events to
// the corresponding arrays keeping the limit.
switch {
case event.Connected != nil:
peer.Connected = append(peer.Connected, event.Connected)
if first := len(peer.Connected) - sampleLimit; first > 0 {
peer.Connected = peer.Connected[first:]
}
peer.Active = true
events = append(events, &peerEvent{
Activity: Active,
IP: peer.ip,
ID: peer.id,
})
pc.activeCount++
if peer.listElement != nil {
_ = pc.inactivePeers.Remove(peer.listElement)
peer.listElement = nil
}
case event.Disconnected != nil:
peer.Disconnected = append(peer.Disconnected, event.Disconnected)
if first := len(peer.Disconnected) - sampleLimit; first > 0 {
peer.Disconnected = peer.Disconnected[first:]
}
peer.Active = false
events = append(events, &peerEvent{
Activity: Inactive,
IP: peer.ip,
ID: peer.id,
})
pc.activeCount--
if peer.listElement != nil {
// If the peer is already in the list, remove and reinsert it.
_ = pc.inactivePeers.Remove(peer.listElement)
}
// Insert the peer into the list.
peer.listElement = pc.inactivePeers.PushBack(peer)
}
for pc.inactivePeers.Len() > 0 && pc.activeCount+pc.inactivePeers.Len() > knownPeerLimit {
// While the count of the known peers is greater than the limit,
// remove the first element from the inactive peer list and from the map.
if removedPeer, ok := pc.inactivePeers.Remove(pc.inactivePeers.Front()).(*knownPeer); ok {
events = append(events, pc.removeKnown(removedPeer.ip, removedPeer.id)...)
} else {
log.Warn("Failed to parse the removed peer")
}
}
if pc.activeCount > knownPeerLimit {
log.Warn("Number of active peers is greater than the limit")
}
return events
}
// handleAttempt handles the events of the peers failing before/during the handshake.
// Returns the events occurring during the extension.
func (pc *peerContainer) handleAttempt(event *peerEvent) []*peerEvent {
bundle, events := pc.bundle(event.IP)
bundle.Attempts = append(bundle.Attempts, &peerAttempt{
Connected: *event.Connected,
Disconnected: *event.Disconnected,
})
pc.attemptOrder = append(pc.attemptOrder, event.IP)
for len(pc.attemptOrder) > attemptLimit {
// While the length of the connection attempt order array is greater
// than the limit, remove the first element from the involved peer's
// array and also from the super array.
events = append(events, pc.removeAttempt(pc.attemptOrder[0])...)
pc.attemptOrder = pc.attemptOrder[1:]
}
return events
}
// peerBundle contains the peers belonging to a given IP address.
type peerBundle struct {
// Location contains the geographical location based on the bundle's IP address.
Location *geoLocation `json:"location,omitempty"`
// KnownPeers is the inner map of the metered peer
// maintainer data structure using the node ID as key.
KnownPeers map[string]*knownPeer `json:"knownPeers,omitempty"`
// Attempts contains the failed connection attempts of the
// peers belonging to a given IP address in chronological order.
Attempts []*peerAttempt `json:"attempts,omitempty"`
}
// removeKnown removes the known peer belonging to the
// given IP address and node ID from the peer tree.
func (pc *peerContainer) removeKnown(ip, id string) (events []*peerEvent) {
// TODO (kurkomisi): Remove peers that don't have traffic samples anymore.
if bundle, ok := pc.Bundles[ip]; ok {
if _, ok := bundle.KnownPeers[id]; ok {
events = append(events, &peerEvent{
Remove: RemoveKnown,
IP: ip,
ID: id,
})
delete(bundle.KnownPeers, id)
} else {
log.Warn("No peer to remove", "ip", ip, "id", id)
}
if len(bundle.KnownPeers) < 1 && len(bundle.Attempts) < 1 {
events = append(events, &peerEvent{
Remove: RemoveBundle,
IP: ip,
})
delete(pc.Bundles, ip)
}
} else {
log.Warn("No bundle to remove", "ip", ip)
}
return events
}
// removeAttempt removes the peer attempt belonging to the
// given IP address and node ID from the peer tree.
func (pc *peerContainer) removeAttempt(ip string) (events []*peerEvent) {
if bundle, ok := pc.Bundles[ip]; ok {
if len(bundle.Attempts) > 0 {
events = append(events, &peerEvent{
Remove: RemoveAttempt,
IP: ip,
})
bundle.Attempts = bundle.Attempts[1:]
}
if len(bundle.Attempts) < 1 && len(bundle.KnownPeers) < 1 {
events = append(events, &peerEvent{
Remove: RemoveBundle,
IP: ip,
})
delete(pc.Bundles, ip)
}
}
return events
}
// knownPeer inserts a new peer into the map, if the peer belonging
// to the given IP address and node ID wasn't metered so far. Returns the peer
// belonging to the given IP and ID as well as the events occurring during the
// initialization.
func (bundle *peerBundle) knownPeer(ip, id string) (*knownPeer, []*peerEvent) {
var events []*peerEvent
if _, ok := bundle.KnownPeers[id]; !ok {
now := time.Now()
ingress := emptyChartEntries(now, sampleLimit)
egress := emptyChartEntries(now, sampleLimit)
events = append(events, &peerEvent{
IP: ip,
ID: id,
Ingress: append([]*ChartEntry{}, ingress...),
Egress: append([]*ChartEntry{}, egress...),
})
bundle.KnownPeers[id] = &knownPeer{
ip: ip,
id: id,
Ingress: ingress,
Egress: egress,
}
}
return bundle.KnownPeers[id], events
}
// knownPeer contains the metered data of a particular peer.
type knownPeer struct {
// Connected contains the timestamps of the peer's connection events.
Connected []*time.Time `json:"connected,omitempty"`
// Disconnected contains the timestamps of the peer's disconnection events.
Disconnected []*time.Time `json:"disconnected,omitempty"`
// Ingress and Egress contain the peer's traffic samples, which are collected
// periodically from the metrics registry.
//
// A peer can connect multiple times, and we want to visualize the time
// passed between two connections, so after the first connection a 0 value
// is appended to the traffic arrays even if the peer is inactive until the
// peer is removed.
Ingress ChartEntries `json:"ingress,omitempty"`
Egress ChartEntries `json:"egress,omitempty"`
Active bool `json:"active"` // Denotes if the peer is still connected.
listElement *list.Element // Pointer to the peer element in the list.
ip, id string // The IP and the ID by which the peer can be accessed in the tree.
prevIngress float64
prevEgress float64
}
// peerAttempt contains a failed peer connection attempt's attributes.
type peerAttempt struct {
// Connected contains the timestamp of the connection attempt's moment.
Connected time.Time `json:"connected"`
// Disconnected contains the timestamp of the
// moment when the connection attempt failed.
Disconnected time.Time `json:"disconnected"`
}
type RemovedPeerType string
type ActivityType string
const (
RemoveKnown RemovedPeerType = "known"
RemoveAttempt RemovedPeerType = "attempt"
RemoveBundle RemovedPeerType = "bundle"
Active ActivityType = "active"
Inactive ActivityType = "inactive"
)
// peerEvent contains the attributes of a peer event.
type peerEvent struct {
IP string `json:"ip,omitempty"` // IP address of the peer.
ID string `json:"id,omitempty"` // Node ID of the peer.
Remove RemovedPeerType `json:"remove,omitempty"` // Type of the peer that is to be removed.
Location *geoLocation `json:"location,omitempty"` // Geographical location of the peer.
Connected *time.Time `json:"connected,omitempty"` // Timestamp of the connection moment.
Disconnected *time.Time `json:"disconnected,omitempty"` // Timestamp of the disonnection moment.
Ingress ChartEntries `json:"ingress,omitempty"` // Ingress samples.
Egress ChartEntries `json:"egress,omitempty"` // Egress samples.
Activity ActivityType `json:"activity,omitempty"` // Connection status change.
}
// trafficMap is a container for the periodically collected peer traffic.
type trafficMap map[string]map[string]float64
// insert inserts a new value to the traffic map. Overwrites
// the value at the given ip and id if that already exists.
func (m *trafficMap) insert(ip, id string, val float64) {
if _, ok := (*m)[ip]; !ok {
(*m)[ip] = make(map[string]float64)
}
(*m)[ip][id] = val
}
// collectPeerData gathers data about the peers and sends it to the clients.
func (db *Dashboard) collectPeerData() {
defer db.wg.Done()
// Open the geodb database for IP to geographical information conversions.
var err error
db.geodb, err = openGeoDB()
if err != nil {
log.Warn("Failed to open geodb", "err", err)
return
}
defer db.geodb.close()
peerCh := make(chan p2p.MeteredPeerEvent, eventBufferLimit) // Peer event channel.
subPeer := p2p.SubscribeMeteredPeerEvent(peerCh) // Subscribe to peer events.
defer subPeer.Unsubscribe() // Unsubscribe at the end.
ticker := time.NewTicker(db.config.Refresh)
defer ticker.Stop()
type registryFunc func(name string, i interface{})
type collectorFunc func(traffic *trafficMap) registryFunc
// trafficCollector generates a function that can be passed to
// the prefixed peer registry in order to collect the metered
// traffic data from each peer meter.
trafficCollector := func(prefix string) collectorFunc {
// This part makes is possible to collect the
// traffic data into a map from outside.
return func(traffic *trafficMap) registryFunc {
// The function which can be passed to the registry.
return func(name string, i interface{}) {
if m, ok := i.(metrics.Meter); ok {
// The name of the meter has the format: <common traffic prefix><IP>/<ID>
if k := strings.Split(strings.TrimPrefix(name, prefix), "/"); len(k) == 2 {
traffic.insert(k[0], k[1], float64(m.Count()))
} else {
log.Warn("Invalid meter name", "name", name, "prefix", prefix)
}
} else {
log.Warn("Invalid meter type", "name", name)
}
}
}
}
collectIngress := trafficCollector(p2p.MetricsInboundTraffic + "/")
collectEgress := trafficCollector(p2p.MetricsOutboundTraffic + "/")
peers := newPeerContainer(db.geodb)
db.peerLock.Lock()
db.history.Network = &NetworkMessage{
Peers: peers,
}
db.peerLock.Unlock()
// newPeerEvents contains peer events, which trigger operations that
// will be executed on the peer tree after a metering period.
newPeerEvents := make([]*peerEvent, 0, eventLimit)
ingress, egress := new(trafficMap), new(trafficMap)
*ingress, *egress = make(trafficMap), make(trafficMap)
for {
select {
case event := <-peerCh:
now := time.Now()
switch event.Type {
case p2p.PeerConnected:
connected := now.Add(-event.Elapsed)
newPeerEvents = append(newPeerEvents, &peerEvent{
IP: event.IP.String(),
ID: event.ID.String(),
Connected: &connected,
})
case p2p.PeerDisconnected:
ip, id := event.IP.String(), event.ID.String()
newPeerEvents = append(newPeerEvents, &peerEvent{
IP: ip,
ID: id,
Disconnected: &now,
})
// The disconnect event comes with the last metered traffic count,
// because after the disconnection the peer's meter is removed
// from the registry. It can happen, that between two metering
// period the same peer disconnects multiple times, and appending
// all the samples to the traffic arrays would shift the metering,
// so only the last metering is stored, overwriting the previous one.
ingress.insert(ip, id, float64(event.Ingress))
egress.insert(ip, id, float64(event.Egress))
case p2p.PeerHandshakeFailed:
connected := now.Add(-event.Elapsed)
newPeerEvents = append(newPeerEvents, &peerEvent{
IP: event.IP.String(),
Connected: &connected,
Disconnected: &now,
})
default:
log.Error("Unknown metered peer event type", "type", event.Type)
}
case <-ticker.C:
// Collect the traffic samples from the registry.
p2p.PeerIngressRegistry.Each(collectIngress(ingress))
p2p.PeerEgressRegistry.Each(collectEgress(egress))
// Protect 'peers', because it is part of the history.
db.peerLock.Lock()
var diff []*peerEvent
for i := 0; i < len(newPeerEvents); i++ {
if newPeerEvents[i].IP == "" {
log.Warn("Peer event without IP", "event", *newPeerEvents[i])
continue
}
diff = append(diff, newPeerEvents[i])
// There are two main branches of peer events coming from the event
// feed, one belongs to the known peers, one to the unknown peers.
// If the event has node ID, it belongs to a known peer, otherwise
// to an unknown one, which is considered as connection attempt.
//
// The extension can produce additional peer events, such
// as remove, location and initial samples events.
if newPeerEvents[i].ID == "" {
diff = append(diff, peers.handleAttempt(newPeerEvents[i])...)
continue
}
diff = append(diff, peers.extendKnown(newPeerEvents[i])...)
}
// Update the peer tree using the traffic maps.
for ip, bundle := range peers.Bundles {
for id, peer := range bundle.KnownPeers {
// Value is 0 if the traffic map doesn't have the
// entry corresponding to the given IP and ID.
curIngress, curEgress := (*ingress)[ip][id], (*egress)[ip][id]
deltaIngress, deltaEgress := curIngress, curEgress
if deltaIngress >= peer.prevIngress {
deltaIngress -= peer.prevIngress
}
if deltaEgress >= peer.prevEgress {
deltaEgress -= peer.prevEgress
}
peer.prevIngress, peer.prevEgress = curIngress, curEgress
i := &ChartEntry{
Value: deltaIngress,
}
e := &ChartEntry{
Value: deltaEgress,
}
peer.Ingress = append(peer.Ingress, i)
peer.Egress = append(peer.Egress, e)
if first := len(peer.Ingress) - sampleLimit; first > 0 {
peer.Ingress = peer.Ingress[first:]
}
if first := len(peer.Egress) - sampleLimit; first > 0 {
peer.Egress = peer.Egress[first:]
}
// Creating the traffic sample events.
diff = append(diff, &peerEvent{
IP: ip,
ID: id,
Ingress: ChartEntries{i},
Egress: ChartEntries{e},
})
}
}
db.peerLock.Unlock()
if len(diff) > 0 {
db.sendToAll(&Message{Network: &NetworkMessage{
Diff: diff,
}})
}
// Clear the traffic maps, and the event array,
// prepare them for the next metering.
*ingress, *egress = make(trafficMap), make(trafficMap)
newPeerEvents = newPeerEvents[:0]
case err := <-subPeer.Err():
log.Warn("Peer subscription error", "err", err)
return
case errc := <-db.quit:
errc <- nil
return
}
}
}

146
dashboard/system.go Normal file
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@ -0,0 +1,146 @@
// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package dashboard
import (
"runtime"
"time"
"github.com/elastic/gosigar"
"github.com/ethereum/go-ethereum/metrics"
"github.com/ethereum/go-ethereum/p2p"
)
// meterCollector returns a function, which retrieves the count of a specific meter.
func meterCollector(name string) func() int64 {
if meter := metrics.Get(name); meter != nil {
m := meter.(metrics.Meter)
return func() int64 {
return m.Count()
}
}
return func() int64 {
return 0
}
}
// collectSystemData gathers data about the system and sends it to the clients.
func (db *Dashboard) collectSystemData() {
defer db.wg.Done()
systemCPUUsage := gosigar.Cpu{}
systemCPUUsage.Get()
var (
mem runtime.MemStats
collectNetworkIngress = meterCollector(p2p.MetricsInboundTraffic)
collectNetworkEgress = meterCollector(p2p.MetricsOutboundTraffic)
collectDiskRead = meterCollector("eth/db/chaindata/disk/read")
collectDiskWrite = meterCollector("eth/db/chaindata/disk/write")
prevNetworkIngress = collectNetworkIngress()
prevNetworkEgress = collectNetworkEgress()
prevProcessCPUTime = getProcessCPUTime()
prevSystemCPUUsage = systemCPUUsage
prevDiskRead = collectDiskRead()
prevDiskWrite = collectDiskWrite()
frequency = float64(db.config.Refresh / time.Second)
numCPU = float64(runtime.NumCPU())
)
for {
select {
case errc := <-db.quit:
errc <- nil
return
case <-time.After(db.config.Refresh):
systemCPUUsage.Get()
var (
curNetworkIngress = collectNetworkIngress()
curNetworkEgress = collectNetworkEgress()
curProcessCPUTime = getProcessCPUTime()
curSystemCPUUsage = systemCPUUsage
curDiskRead = collectDiskRead()
curDiskWrite = collectDiskWrite()
deltaNetworkIngress = float64(curNetworkIngress - prevNetworkIngress)
deltaNetworkEgress = float64(curNetworkEgress - prevNetworkEgress)
deltaProcessCPUTime = curProcessCPUTime - prevProcessCPUTime
deltaSystemCPUUsage = curSystemCPUUsage.Delta(prevSystemCPUUsage)
deltaDiskRead = curDiskRead - prevDiskRead
deltaDiskWrite = curDiskWrite - prevDiskWrite
)
prevNetworkIngress = curNetworkIngress
prevNetworkEgress = curNetworkEgress
prevProcessCPUTime = curProcessCPUTime
prevSystemCPUUsage = curSystemCPUUsage
prevDiskRead = curDiskRead
prevDiskWrite = curDiskWrite
runtime.ReadMemStats(&mem)
activeMemory := &ChartEntry{
Value: float64(mem.Alloc) / frequency,
}
virtualMemory := &ChartEntry{
Value: float64(mem.Sys) / frequency,
}
networkIngress := &ChartEntry{
Value: deltaNetworkIngress / frequency,
}
networkEgress := &ChartEntry{
Value: deltaNetworkEgress / frequency,
}
processCPU := &ChartEntry{
Value: deltaProcessCPUTime / frequency / numCPU * 100,
}
systemCPU := &ChartEntry{
Value: float64(deltaSystemCPUUsage.Sys+deltaSystemCPUUsage.User) / frequency / numCPU,
}
diskRead := &ChartEntry{
Value: float64(deltaDiskRead) / frequency,
}
diskWrite := &ChartEntry{
Value: float64(deltaDiskWrite) / frequency,
}
db.sysLock.Lock()
sys := db.history.System
sys.ActiveMemory = append(sys.ActiveMemory[1:], activeMemory)
sys.VirtualMemory = append(sys.VirtualMemory[1:], virtualMemory)
sys.NetworkIngress = append(sys.NetworkIngress[1:], networkIngress)
sys.NetworkEgress = append(sys.NetworkEgress[1:], networkEgress)
sys.ProcessCPU = append(sys.ProcessCPU[1:], processCPU)
sys.SystemCPU = append(sys.SystemCPU[1:], systemCPU)
sys.DiskRead = append(sys.DiskRead[1:], diskRead)
sys.DiskWrite = append(sys.DiskWrite[1:], diskWrite)
db.sysLock.Unlock()
db.sendToAll(&Message{
System: &SystemMessage{
ActiveMemory: ChartEntries{activeMemory},
VirtualMemory: ChartEntries{virtualMemory},
NetworkIngress: ChartEntries{networkIngress},
NetworkEgress: ChartEntries{networkEgress},
ProcessCPU: ChartEntries{processCPU},
SystemCPU: ChartEntries{systemCPU},
DiskRead: ChartEntries{diskRead},
DiskWrite: ChartEntries{diskWrite},
},
})
}
}
}

1
p2p/metrics.go
View File

@ -161,6 +161,7 @@ func (c *meteredConn) Write(b []byte) (n int, err error) {
// the ingress and the egress traffic registries using the peer's IP and node ID,
// also emits connect event.
func (c *meteredConn) handshakeDone(id enode.ID) {
// TODO (kurkomisi): use the node URL instead of the pure node ID. (the String() method of *Node)
if atomic.AddInt32(&meteredPeerCount, 1) >= MeteredPeerLimit {
// Don't register the peer in the traffic registries.
atomic.AddInt32(&meteredPeerCount, -1)

11
vendor/github.com/apilayer/freegeoip/AUTHORS generated vendored Normal file
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@ -0,0 +1,11 @@
# This is the official list of freegeoip authors for copyright purposes.
# This file is distinct from the CONTRIBUTORS file.
#
# Names should be added to this file as
# Name or Organization <email address>
#
# The email address is not required for organizations.
#
# Please keep the list sorted.
Alexandre Fiori <fiorix@gmail.com>

22
vendor/github.com/apilayer/freegeoip/CONTRIBUTORS generated vendored Normal file
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@ -0,0 +1,22 @@
# This is the official list of freegeoip contributors for copyright purposes.
# This file is distinct from the AUTHORS file.
#
# Names should be added to this file as
# Name or Organization <email address>
#
# Please keep the list sorted.
#
# Use the following command to generate the list:
#
# git shortlog -se | awk '{print $2 " " $3 " " $4}'
#
# The email address is not required for organizations.
Alex Goretoy <alex@goretoy.com>
Gleicon Moraes <gleicon@gmail.com>
Leandro Pereira <leandro@hardinfo.org>
Lucas Fontes <lxfontes@gmail.com>
Matthias Nehlsen <matthias.nehlsen@gmail.com>
Melchi <melchi.si@gmail.com>
Nick Muerdter <stuff@nickm.org>
Vladimir Agafonkin <agafonkin@gmail.com>

25
vendor/github.com/apilayer/freegeoip/Dockerfile generated vendored Normal file
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@ -0,0 +1,25 @@
FROM golang:1.9
COPY cmd/freegeoip/public /var/www
ADD . /go/src/github.com/apilayer/freegeoip
RUN \
cd /go/src/github.com/apilayer/freegeoip/cmd/freegeoip && \
go get -d && go install && \
apt-get update && apt-get install -y libcap2-bin && \
setcap cap_net_bind_service=+ep /go/bin/freegeoip && \
apt-get clean && rm -rf /var/lib/apt/lists/* && \
useradd -ms /bin/bash freegeoip
USER freegeoip
ENTRYPOINT ["/go/bin/freegeoip"]
EXPOSE 8080
# CMD instructions:
# Add "-use-x-forwarded-for" if your server is behind a reverse proxy
# Add "-public", "/var/www" to enable the web front-end
# Add "-internal-server", "8888" to enable the pprof+metrics server
#
# Example:
# CMD ["-use-x-forwarded-for", "-public", "/var/www", "-internal-server", "8888"]

55
vendor/github.com/apilayer/freegeoip/HISTORY.md generated vendored Normal file
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@ -0,0 +1,55 @@
# History of freegeoip.net
The freegeoip software is the result of a web server research project that
started in 2009, written in Python and hosted on
[Google App Engine](http://appengine.google.com). It was rapidly adopted by
many developers around the world due to its simplistic and straightforward
HTTP API, causing the free account on GAE to exceed its quota every day
after few hours of operation.
A year later freegeoip 1.0 was released, and the freegeoip.net domain
moved over to its own server infrastructure. The software was rewritten
using the [Cyclone](http://cyclone.io) web framework, backed by
[Twisted](http://twistedmatrix.com) and [PyPy](http://pypy.org) in
production. That's when the first database management tool was created,
a script that would download many pieces of information from the Internet
to create the IP database, an sqlite flat file used by the server.
This version of the Python server shipped with a much better front-end as
well, but still as a server-side rendered template inherited from the GAE
version. It was only circa 2011 that freegeoip got its first standalone
front-end based on jQuery, and is when Twitter bootstrap was first used.
Python played an important role in the early life of freegeoip and
allowed the service to grow and evolve fast. It provided a lot of
flexibility in building and maintaining the IP database using multiple
sources of data. This version of the server lasted until 2013, when
it was once again rewritten from scratch, this time in Go. The database
tool, however, remained intact.
In 2013 the Go version was released as freegeoip 2.0 and this version
had many iterations. The first versions of the server written in Go were
very rustic, practically a verbatim transcription of the Python server.
Took a while until it started looking more like common Go code, and to
have tests.
Another important change that shipped with v2 was a front-end based on
AngularJS, but still mixed with some jQuery. The Google map in the front
page was made optional to put more focus on the HTTP API. The popularity
of freegeoip has increased considerably over the years of 2013 and 2014,
calling for more.
Enter freegeoip 3.0, an evolution of the Go server. The foundation of
freegeoip, which is the IP database and HTTP API, now lives in a Go
package that other developers can leverage. The freegeoip web server is
built on this package making its code cleaner, the server faster,
and requires zero maintenance for the IP database. The server downloads
the file from MaxMind and keep it up to date in background.
This and other changes make it very Docker friendly.
The front-end has been trimmed down to a single index.html file that loads
CSS and JS from CDNs on the internet. The JS part is based on AngularJS
and handles the search request and response of the public site. The
optional map has become a link to Google Maps following the lat/long
of the query results.

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Copyright (c) 2009 The freegeoip authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* The names of authors or contributors may NOT be used to endorse or
promote products derived from this software without specific prior
written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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web: freegeoip -http :${PORT} -use-x-forwarded-for -public /app/cmd/freegeoip/public -quota-backend map -quota-max 10000

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![freegeoip ipstack](https://raw.githubusercontent.com/apilayer/freegeoip/master/freegeo-warning.png)
# freegeoip - Important Announcement
*[The old freegeoip API is now deprecated and will be discontinued on July 1st, 2018]*
Launched more than 6 years ago, the freegeoip.net API has grown into one of the biggest and most widely used APIs for IP to location services worldwide. The API is used by thousands of developers, SMBs and large corporations around the globe and is currently handling more than 2 billion requests per day. After years of operation and the API remaining almost unchanged, today we announce the complete re-launch of freegeoip into a faster, more advanced and more scalable API service called ipstack (https://ipstack.com). All users that wish to continue using our IP to location service will be required to sign up to obtain a free API access key and perform a few simple changes to their integration. While the new API offers the ability to return data in the same structure as the old freegeoip API, the new API structure offers various options of delivering much more advanced data for IP Addresses.
## Required Changes to Legacy Integrations (freegeoip.net/json/xml)
As of March 31 2018 the old freegeoip API is deprecated and a completely re-designed API is now accessible at http://api.ipstack.com. While the new API offers the same capabilities as the old one and also has the option of returning data in the legacy format, the API URL has now changed and all users are required to sign up for a free API Access Key to use the service.
1. Get a free ipstack Account and Access Key
Head over to https://ipstack.com and follow the instructions to create your account and obtain your access token. If you only need basic IP to Geolocation data and do not require more than 10,000 requests per month, you can use the free account. If you'd like more advanced features or more requests than included in the free account you will need to choose one of the paid options. You can find an overview of all available plans at https://ipstack.com/product
2. Integrate the new API URL
The new API comes with a completely new endpoint (api.ipstack.com) and requires you to append your API Access Key to the URL as a GET parameter. For complete integration instructions, please head over to the API Documentation at https://ipstack.com/documentation. While the new API offers a completely reworked response structure with many additional data points, we also offer the option to receive results in the old freegeoip.net format in JSON or XML.
To receive your API results in the old freegeoip format, please simply append &legacy=1 to the new API URL.
JSON Example: http://api.ipstack.com/186.116.207.169?access_key=YOUR_ACCESS_KEY&output=json&legacy=1
XML Example: http://api.ipstack.com/186.116.207.169?access_key=YOUR_ACCESS_KEY&output=xml&legacy=1
## New features with ipstack
While the new ipstack service now runs on a commercial/freemium model, we have worked hard at building a faster, more scalable, and more advanced IP to location API product. You can read more about all the new features by navigating to https://ipstack.com, but here's a list of the most important changes and additions:
- We're still free for basic usage
While we now offer paid / premium options for our more advanced users, our core product and IP to Country/Region/City product is still completely free of charge for up to 10,000 requests per month. If you need more advanced data or more requests, you can choose one of the paid plans listed at https://ipstack.com/product
- Batch Requests
Need to validate more than 1 IP Address in a single API Call? Our new Bulk Lookup Feature (available on our paid plans) allows you to geolocate up to 50 IP Addresses in a single API Call.
- Much more Data
While the old freegeoip API was limited to provide only the most basic IP to location data, our new API provides more than 20 additional data points including Language, Time Zone, Current Time, Currencies, Connection & ASN Information, and much more. To learn more about all the data points available, please head over to the ipstack website.
- Security & Fraud Prevention Tools
Do you want to prevent fraudulent traffic from arriving at your website or from abusing your service? Easily spot malicious / proxy / VPN traffic by using our new Security Module, which outputs a lot of valuable security information about an IP Address.
Next Steps
- Deprecation of the old API
While we want to keep the disruption to our current users as minimal as possible, we are planning to shut the old API down on July 1st, 2018. This should give all users enough time to adapt to changes, and should we still see high volumes of traffic going to the old API by that date, we may decide to extend it further. In any case, we highly recommend you switch to the new API as soon as possible. We will keep you posted here about any changes to the planned shutdown date.
- Any Questions? Please get in touch!
It's very important to ensure a smooth transition to ipstack for all freegeoip API users. If you are a developer that has published a plugin/addon that includes the legacy API, we recommend you get in touch with us and also share this announcement with your users. If you have any questions about the transition or the new API, please get in touch with us at support@ipstack.com
# freegeoip - Deprecated Documentation
[![Deploy](https://www.herokucdn.com/deploy/button.svg)](https://heroku.com/deploy)
This is the source code of the freegeoip software. It contains both the web server that empowers freegeoip.net, and a package for the [Go](http://golang.org) programming language that enables any web server to support IP geolocation with a simple and clean API.
See http://en.wikipedia.org/wiki/Geolocation for details about geolocation.
Developers looking for the Go API can skip to the [Package freegeoip](#packagefreegeoip) section below.
## Running
This section is for people who desire to run the freegeoip web server on their own infrastructure. The easiest and most generic way of doing this is by using Docker. All examples below use Docker.
### Docker
#### Install Docker
Docker has [install instructions for many platforms](https://docs.docker.com/engine/installation/),
including
- [Ubuntu](https://docs.docker.com/engine/installation/linux/docker-ce/ubuntu/)
- [CentOS](https://docs.docker.com/engine/installation/linux/docker-ce/centos/)
- [Mac](https://docs.docker.com/docker-for-mac/install/)
#### Run the API in a container
```bash
docker run --restart=always -p 8080:8080 -d apilayer/freegeoip
```
#### Test
```bash
curl localhost:8080/json/1.2.3.4
# => {"ip":"1.2.3.4","country_code":"US","country_name":"United States", # ...
```
### Other Linux, OS X, FreeBSD, and Windows
There are [pre-compiled binaries](https://github.com/apilayer/freegeoip/releases) available.
### Production configuration
For production workloads you may want to use different configuration for the freegeoip web server, for example:
* Enabling the "internal server" for collecting metrics and profiling/tracing the freegeoip web server on demand
* Monitoring the internal server using [Prometheus](https://prometheus.io), or exporting your metrics to [New Relic](https://newrelic.com)
* Serving the freegeoip API over HTTPS (TLS) using your own certificates, or provisioned automatically using [LetsEncrypt.org](https://letsencrypt.org)
* Configuring [HSTS](https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security) to restrict your browser clients to always use HTTPS
* Configuring the read and write timeouts to avoid stale clients consuming server resources
* Configuring the freegeoip web server to read the client IP (for logs, etc) from the X-Forwarded-For header when running behind a reverse proxy
* Configuring [CORS](https://en.wikipedia.org/wiki/Cross-origin_resource_sharing) to restrict access to your API to specific domains
* Configuring a specific endpoint path prefix other than the default "/" (thus /json, /xml, /csv) to serve the API alongside other APIs on the same host
* Optimizing your round trips by enabling [TCP Fast Open](https://en.wikipedia.org/wiki/TCP_Fast_Open) on your OS and the freegeoip web server
* Setting up usage limits (quotas) for your clients (per client IP) based on requests per time interval; we support various backends such as in-memory map (for single instance), or redis or memcache for distributed deployments
* Serve the default [GeoLite2 City](http://dev.maxmind.com/geoip/geoip2/geolite2/) free database that is downloaded and updated automatically in background on a configurable schedule, or
* Serve the commercial [GeoIP2 City](https://www.maxmind.com/en/geoip2-city) database from MaxMind, either as a local file that you provide and update periodically (so the server can reload it), or configured to be downloaded periodically using your API key
See the [Server Options](#serveroptions) section below for more information on configuring the server.
For automation, check out the [freegeoip chef cookbook](https://supermarket.chef.io/cookbooks/freegeoip) or the (legacy) [Ansible Playbook](./cmd/freegeoip/ansible-playbook) for Ubuntu 14.04 LTS.
<a name="serveroptions">
### Server Options
To see all the available options, use the `-help` option:
```bash
docker run --rm -it apilayer/freegeoip -help
```
If you're using LetsEncrypt.org to provision your TLS certificates, you have to listen for HTTPS on port 443. Following is an example of the server listening on 3 different ports: metrics + pprof (8888), http (80), and https (443):
```bash
docker run -p 8888:8888 -p 80:8080 -p 443:8443 -d apilayer/freegeoip \
-internal-server=:8888 \
-http=:8080 \
-https=:8443 \
-hsts=max-age=31536000 \
-letsencrypt \
-letsencrypt-hosts=myfancydomain.io
```
You can configure the freegeiop web server via command line flags or environment variables. The names of environment variables are the same for command line flags, but prefixed with FREEGEOIP, all upperscase, separated by underscores. If you want to use environment variables instead:
```bash
$ cat prod.env
FREEGEOIP_INTERNAL_SERVER=:8888
FREEGEOIP_HTTP=:8080
FREEGEOIP_HTTPS=:8443
FREEGEOIP_HSTS=max-age=31536000
FREEGEOIP_LETSENCRYPT=true
FREEGEOIP_LETSENCRYPT_HOSTS=myfancydomain.io
$ docker run --env-file=prod.env -p 8888:8888 -p 80:8080 -p 443:8443 -d apilayer/freegeoip
```
By default, HTTP/2 is enabled over HTTPS. You can disable by passing the `-http2=false` flag.
Also, the Docker image of freegeoip does not provide the web page from freegeiop.net, it only provides the API. If you want to serve that page, you can pass the `-public=/var/www` parameter in the command line. You can also tell Docker to mount that directory as a volume on the host machine and have it serve your own page, using Docker's `-v` parameter.
If the freegeoip web server is running behind a reverse proxy or load balancer, you have to run it passing the `-use-x-forwarded-for` parameter and provide the `X-Forwarded-For` HTTP header in all requests. This is for the freegeoip web server be able to log the client IP, and to perform geolocation lookups when an IP is not provided to the API, e.g. `/json/` (uses client IP) vs `/json/1.2.3.4`.
## Database
The current implementation uses the free [GeoLite2 City](http://dev.maxmind.com/geoip/geoip2/geolite2/) database from MaxMind.
In the past we had databases from other providers, and at some point even our own database comprised of data from different sources. This means it might change in the future.
If you have purchased the commercial database from MaxMind, you can point the freegeoip web server or (Go API, for dev) to the URL containing the file, or local file, and the server will use it.
In case of files on disk, you can replace the file with a newer version and the freegeoip web server will reload it automatically in background. If instead of a file you use a URL (the default), we periodically check the URL in background to see if there's a new database version available, then download the reload it automatically.
All responses from the freegeiop API contain the date that the database was downloaded in the X-Database-Date HTTP header.
## API
The freegeoip API is served by endpoints that encode the response in different formats.
Example:
```bash
curl freegeoip.net/json/
```
Returns the geolocation information of your own IP address, the source IP address of the connection.
You can pass a different IP or hostname. For example, to lookup the geolocation of `github.com` the server resolves the name first, then uses the first IP address available, which might be IPv4 or IPv6:
```bash
curl freegeoip.net/json/github.com
```
Same semantics are available for the `/xml/{ip}` and `/csv/{ip}` endpoints.
JSON responses can be encoded as JSONP, by adding the `callback` parameter:
```bash
curl freegeoip.net/json/?callback=foobar
```
The callback parameter is ignored on all other endpoints.
## Metrics and profiling
The freegeoip web server can provide metrics about its usage, and also supports runtime profiling and tracing.
Both are disabled by default, but can be enabled by passing the `-internal-server` parameter in the command line. Metrics are generated for [Prometheus](http://prometheus.io) and can be queried at `/metrics` even with curl.
HTTP pprof is available at `/debug/pprof` and the examples from the [pprof](https://golang.org/pkg/net/http/pprof/) package documentation should work on the freegeiop web server.
<a name="packagefreegeoip">
## Package freegeoip
The freegeoip package for the Go programming language provides two APIs:
- A database API that requires zero maintenance of the IP database;
- A geolocation `http.Handler` that can be used/served by any http server.
tl;dr if all you want is code then see the `example_test.go` file.
Otherwise check out the godoc reference.
[![GoDoc](https://godoc.org/github.com/apilayer/freegeoip?status.svg)](https://godoc.org/github.com/apilayer/freegeoip)
[![Build Status](https://secure.travis-ci.org/apilayer/freegeoip.png)](http://travis-ci.org/apilayer/freegeoip)
[![GoReportCard](https://goreportcard.com/badge/github.com/apilayer/freegeoip)](https://goreportcard.com/report/github.com/apilayer/freegeoip)
### Features
- Zero maintenance
The DB object alone can download an IP database file from the internet and service lookups to your program right away. It will auto-update the file in background and always magically work.
- DevOps friendly
If you do care about the database and have the commercial version of the MaxMind database, you can update the database file with your program running and the DB object will load it in background. You can focus on your stuff.
- Extensible
Besides the database part, the package provides an `http.Handler` object that you can add to your HTTP server to service IP geolocation lookups with the same simplistic API of freegeoip.net. There's also an interface for crafting your own HTTP responses encoded in any format.
### Install
Download the package:
go get -d github.com/apilayer/freegeoip/...
Install the web server:
go install github.com/apilayer/freegeoip/cmd/freegeoip
Test coverage is quite good, and test code may help you find the stuff you need.

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{
"name": "freegeoip",
"description": "IP geolocation web server",
"website": "https://github.com/apilayer/freegeoip",
"success_url": "/",
"keywords": ["golang", "geoip", "api"]
}

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// Copyright 2009 The freegeoip authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package freegeoip
import (
"compress/gzip"
"crypto/md5"
"encoding/hex"
"errors"
"fmt"
"io"
"io/ioutil"
"math"
"net"
"net/http"
"net/url"
"os"
"path/filepath"
"sync"
"time"
"github.com/howeyc/fsnotify"
"github.com/oschwald/maxminddb-golang"
)
var (
// ErrUnavailable may be returned by DB.Lookup when the database
// points to a URL and is not yet available because it's being
// downloaded in background.
ErrUnavailable = errors.New("no database available")
// Local cached copy of a database downloaded from a URL.
defaultDB = filepath.Join(os.TempDir(), "freegeoip", "db.gz")
// MaxMindDB is the URL of the free MaxMind GeoLite2 database.
MaxMindDB = "http://geolite.maxmind.com/download/geoip/database/GeoLite2-City.mmdb.gz"
)
// DB is the IP geolocation database.
type DB struct {
file string // Database file name.
checksum string // MD5 of the unzipped database file
reader *maxminddb.Reader // Actual db object.
notifyQuit chan struct{} // Stop auto-update and watch goroutines.
notifyOpen chan string // Notify when a db file is open.
notifyError chan error // Notify when an error occurs.
notifyInfo chan string // Notify random actions for logging
closed bool // Mark this db as closed.
lastUpdated time.Time // Last time the db was updated.
mu sync.RWMutex // Protects all the above.
updateInterval time.Duration // Update interval.
maxRetryInterval time.Duration // Max retry interval in case of failure.
}
// Open creates and initializes a DB from a local file.
//
// The database file is monitored by fsnotify and automatically
// reloads when the file is updated or overwritten.
func Open(dsn string) (*DB, error) {
db := &DB{
file: dsn,
notifyQuit: make(chan struct{}),
notifyOpen: make(chan string, 1),
notifyError: make(chan error, 1),
notifyInfo: make(chan string, 1),
}
err := db.openFile()
if err != nil {
db.Close()
return nil, err
}
err = db.watchFile()
if err != nil {
db.Close()
return nil, fmt.Errorf("fsnotify failed for %s: %s", dsn, err)
}
return db, nil
}
// MaxMindUpdateURL generates the URL for MaxMind paid databases.
func MaxMindUpdateURL(hostname, productID, userID, licenseKey string) (string, error) {
limiter := func(r io.Reader) *io.LimitedReader {
return &io.LimitedReader{R: r, N: 1 << 30}
}
baseurl := "https://" + hostname + "/app/"
// Get the file name for the product ID.
u := baseurl + "update_getfilename?product_id=" + productID
resp, err := http.Get(u)
if err != nil {
return "", err
}
defer resp.Body.Close()
md5hash := md5.New()
_, err = io.Copy(md5hash, limiter(resp.Body))
if err != nil {
return "", err
}
sum := md5hash.Sum(nil)
hexdigest1 := hex.EncodeToString(sum[:])
// Get our client IP address.
resp, err = http.Get(baseurl + "update_getipaddr")
if err != nil {
return "", err
}
defer resp.Body.Close()
md5hash = md5.New()
io.WriteString(md5hash, licenseKey)
_, err = io.Copy(md5hash, limiter(resp.Body))
if err != nil {
return "", err
}
sum = md5hash.Sum(nil)
hexdigest2 := hex.EncodeToString(sum[:])
// Generate the URL.
params := url.Values{
"db_md5": {hexdigest1},
"challenge_md5": {hexdigest2},
"user_id": {userID},
"edition_id": {productID},
}
u = baseurl + "update_secure?" + params.Encode()
return u, nil
}
// OpenURL creates and initializes a DB from a URL.
// It automatically downloads and updates the file in background, and
// keeps a local copy on $TMPDIR.
func OpenURL(url string, updateInterval, maxRetryInterval time.Duration) (*DB, error) {
db := &DB{
file: defaultDB,
notifyQuit: make(chan struct{}),
notifyOpen: make(chan string, 1),
notifyError: make(chan error, 1),
notifyInfo: make(chan string, 1),
updateInterval: updateInterval,
maxRetryInterval: maxRetryInterval,
}
db.openFile() // Optional, might fail.
go db.autoUpdate(url)
err := db.watchFile()
if err != nil {
db.Close()
return nil, fmt.Errorf("fsnotify failed for %s: %s", db.file, err)
}
return db, nil
}
func (db *DB) watchFile() error {
watcher, err := fsnotify.NewWatcher()
if err != nil {
return err
}
dbdir, err := db.makeDir()
if err != nil {
return err
}
go db.watchEvents(watcher)
return watcher.Watch(dbdir)
}
func (db *DB) watchEvents(watcher *fsnotify.Watcher) {
for {
select {
case ev := <-watcher.Event:
if ev.Name == db.file && (ev.IsCreate() || ev.IsModify()) {
db.openFile()
}
case <-watcher.Error:
case <-db.notifyQuit:
watcher.Close()
return
}
time.Sleep(time.Second) // Suppress high-rate events.
}
}
func (db *DB) openFile() error {
reader, checksum, err := db.newReader(db.file)
if err != nil {
return err
}
stat, err := os.Stat(db.file)
if err != nil {
return err
}
db.setReader(reader, stat.ModTime(), checksum)
return nil
}
func (db *DB) newReader(dbfile string) (*maxminddb.Reader, string, error) {
f, err := os.Open(dbfile)
if err != nil {
return nil, "", err
}
defer f.Close()
gzf, err := gzip.NewReader(f)
if err != nil {
return nil, "", err
}
defer gzf.Close()
b, err := ioutil.ReadAll(gzf)
if err != nil {
return nil, "", err
}
checksum := fmt.Sprintf("%x", md5.Sum(b))
mmdb, err := maxminddb.FromBytes(b)
return mmdb, checksum, err
}
func (db *DB) setReader(reader *maxminddb.Reader, modtime time.Time, checksum string) {
db.mu.Lock()
defer db.mu.Unlock()
if db.closed {
reader.Close()
return
}
if db.reader != nil {
db.reader.Close()
}
db.reader = reader
db.lastUpdated = modtime.UTC()
db.checksum = checksum
select {
case db.notifyOpen <- db.file:
default:
}
}
func (db *DB) autoUpdate(url string) {
backoff := time.Second
for {
db.sendInfo("starting update")
err := db.runUpdate(url)
if err != nil {
bs := backoff.Seconds()
ms := db.maxRetryInterval.Seconds()
backoff = time.Duration(math.Min(bs*math.E, ms)) * time.Second
db.sendError(fmt.Errorf("download failed (will retry in %s): %s", backoff, err))
} else {
backoff = db.updateInterval
}
db.sendInfo("finished update")
select {
case <-db.notifyQuit:
return
case <-time.After(backoff):
// Sleep till time for the next update attempt.
}
}
}
func (db *DB) runUpdate(url string) error {
yes, err := db.needUpdate(url)
if err != nil {
return err
}
if !yes {
return nil
}
tmpfile, err := db.download(url)
if err != nil {
return err
}
err = db.renameFile(tmpfile)
if err != nil {
// Cleanup the tempfile if renaming failed.
os.RemoveAll(tmpfile)
}
return err
}
func (db *DB) needUpdate(url string) (bool, error) {
stat, err := os.Stat(db.file)
if err != nil {
return true, nil // Local db is missing, must be downloaded.
}
resp, err := http.Head(url)
if err != nil {
return false, err
}
defer resp.Body.Close()
// Check X-Database-MD5 if it exists
headerMd5 := resp.Header.Get("X-Database-MD5")
if len(headerMd5) > 0 && db.checksum != headerMd5 {
return true, nil
}
if stat.Size() != resp.ContentLength {
return true, nil
}
return false, nil
}
func (db *DB) download(url string) (tmpfile string, err error) {
resp, err := http.Get(url)
if err != nil {
return "", err
}
defer resp.Body.Close()
tmpfile = filepath.Join(os.TempDir(),
fmt.Sprintf("_freegeoip.%d.db.gz", time.Now().UnixNano()))
f, err := os.Create(tmpfile)
if err != nil {
return "", err
}
defer f.Close()
_, err = io.Copy(f, resp.Body)
if err != nil {
return "", err
}
return tmpfile, nil
}
func (db *DB) makeDir() (dbdir string, err error) {
dbdir = filepath.Dir(db.file)
_, err = os.Stat(dbdir)
if err != nil {
err = os.MkdirAll(dbdir, 0755)
if err != nil {
return "", err
}
}
return dbdir, nil
}
func (db *DB) renameFile(name string) error {
os.Rename(db.file, db.file+".bak") // Optional, might fail.
_, err := db.makeDir()
if err != nil {
return err
}
return os.Rename(name, db.file)
}
// Date returns the UTC date the database file was last modified.
// If no database file has been opened the behaviour of Date is undefined.
func (db *DB) Date() time.Time {
db.mu.RLock()
defer db.mu.RUnlock()
return db.lastUpdated
}
// NotifyClose returns a channel that is closed when the database is closed.
func (db *DB) NotifyClose() <-chan struct{} {
return db.notifyQuit
}
// NotifyOpen returns a channel that notifies when a new database is
// loaded or reloaded. This can be used to monitor background updates
// when the DB points to a URL.
func (db *DB) NotifyOpen() (filename <-chan string) {
return db.notifyOpen
}
// NotifyError returns a channel that notifies when an error occurs
// while downloading or reloading a DB that points to a URL.
func (db *DB) NotifyError() (errChan <-chan error) {
return db.notifyError
}
// NotifyInfo returns a channel that notifies informational messages
// while downloading or reloading.
func (db *DB) NotifyInfo() <-chan string {
return db.notifyInfo
}
func (db *DB) sendError(err error) {
db.mu.RLock()
defer db.mu.RUnlock()
if db.closed {
return
}
select {
case db.notifyError <- err:
default:
}
}
func (db *DB) sendInfo(message string) {
db.mu.RLock()
defer db.mu.RUnlock()
if db.closed {
return
}
select {
case db.notifyInfo <- message:
default:
}
}
// Lookup performs a database lookup of the given IP address, and stores
// the response into the result value. The result value must be a struct
// with specific fields and tags as described here:
// https://godoc.org/github.com/oschwald/maxminddb-golang#Reader.Lookup
//
// See the DefaultQuery for an example of the result struct.
func (db *DB) Lookup(addr net.IP, result interface{}) error {
db.mu.RLock()
defer db.mu.RUnlock()
if db.reader != nil {
return db.reader.Lookup(addr, result)
}
return ErrUnavailable
}
// DefaultQuery is the default query used for database lookups.
type DefaultQuery struct {
Continent struct {
Names map[string]string `maxminddb:"names"`
} `maxminddb:"continent"`
Country struct {
ISOCode string `maxminddb:"iso_code"`
Names map[string]string `maxminddb:"names"`
} `maxminddb:"country"`
Region []struct {
ISOCode string `maxminddb:"iso_code"`
Names map[string]string `maxminddb:"names"`
} `maxminddb:"subdivisions"`
City struct {
Names map[string]string `maxminddb:"names"`
} `maxminddb:"city"`
Location struct {
Latitude float64 `maxminddb:"latitude"`
Longitude float64 `maxminddb:"longitude"`
MetroCode uint `maxminddb:"metro_code"`
TimeZone string `maxminddb:"time_zone"`
} `maxminddb:"location"`
Postal struct {
Code string `maxminddb:"code"`
} `maxminddb:"postal"`
}
// Close closes the database.
func (db *DB) Close() {
db.mu.Lock()
defer db.mu.Unlock()
if !db.closed {
db.closed = true
close(db.notifyQuit)
close(db.notifyOpen)
close(db.notifyError)
close(db.notifyInfo)
}
if db.reader != nil {
db.reader.Close()
db.reader = nil
}
}

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// Copyright 2009 The freegeoip authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Package freegeoip provides an API for searching the geolocation of IP
// addresses. It uses a database that can be either a local file or a
// remote resource from a URL.
//
// Local databases are monitored by fsnotify and reloaded when the file is
// either updated or overwritten.
//
// Remote databases are automatically downloaded and updated in background
// so you can focus on using the API and not managing the database.
package freegeoip

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# Names should be added to this file as
# Name or Organization <email address>
# The email address is not required for organizations.
# You can update this list using the following command:
#
# $ git shortlog -se | awk '{print $2 " " $3 " " $4}'
# Please keep the list sorted.
Adrien Bustany <adrien@bustany.org>
Caleb Spare <cespare@gmail.com>
Case Nelson <case@teammating.com>
Chris Howey <howeyc@gmail.com> <chris@howey.me>
Christoffer Buchholz <christoffer.buchholz@gmail.com>
Dave Cheney <dave@cheney.net>
Francisco Souza <f@souza.cc>
John C Barstow
Kelvin Fo <vmirage@gmail.com>
Nathan Youngman <git@nathany.com>
Paul Hammond <paul@paulhammond.org>
Pursuit92 <JoshChase@techpursuit.net>
Rob Figueiredo <robfig@gmail.com>
Travis Cline <travis.cline@gmail.com>
Tudor Golubenco <tudor.g@gmail.com>
bronze1man <bronze1man@gmail.com>
debrando <denis.brandolini@gmail.com>
henrikedwards <henrik.edwards@gmail.com>

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# Changelog
## v0.9.0 / 2014-01-17
* IsAttrib() for events that only concern a file's metadata [#79][] (thanks @abustany)
* [Fix] kqueue: fix deadlock [#77][] (thanks @cespare)
* [NOTICE] Development has moved to `code.google.com/p/go.exp/fsnotify` in preparation for inclusion in the Go standard library.
## v0.8.12 / 2013-11-13
* [API] Remove FD_SET and friends from Linux adapter
## v0.8.11 / 2013-11-02
* [Doc] Add Changelog [#72][] (thanks @nathany)
* [Doc] Spotlight and double modify events on OS X [#62][] (reported by @paulhammond)
## v0.8.10 / 2013-10-19
* [Fix] kqueue: remove file watches when parent directory is removed [#71][] (reported by @mdwhatcott)
* [Fix] kqueue: race between Close and readEvents [#70][] (reported by @bernerdschaefer)
* [Doc] specify OS-specific limits in README (thanks @debrando)
## v0.8.9 / 2013-09-08
* [Doc] Contributing (thanks @nathany)
* [Doc] update package path in example code [#63][] (thanks @paulhammond)
* [Doc] GoCI badge in README (Linux only) [#60][]
* [Doc] Cross-platform testing with Vagrant [#59][] (thanks @nathany)
## v0.8.8 / 2013-06-17
* [Fix] Windows: handle `ERROR_MORE_DATA` on Windows [#49][] (thanks @jbowtie)
## v0.8.7 / 2013-06-03
* [API] Make syscall flags internal
* [Fix] inotify: ignore event changes
* [Fix] race in symlink test [#45][] (reported by @srid)
* [Fix] tests on Windows
* lower case error messages
## v0.8.6 / 2013-05-23
* kqueue: Use EVT_ONLY flag on Darwin
* [Doc] Update README with full example
## v0.8.5 / 2013-05-09
* [Fix] inotify: allow monitoring of "broken" symlinks (thanks @tsg)
## v0.8.4 / 2013-04-07
* [Fix] kqueue: watch all file events [#40][] (thanks @ChrisBuchholz)
## v0.8.3 / 2013-03-13
* [Fix] inoitfy/kqueue memory leak [#36][] (reported by @nbkolchin)
* [Fix] kqueue: use fsnFlags for watching a directory [#33][] (reported by @nbkolchin)
## v0.8.2 / 2013-02-07
* [Doc] add Authors
* [Fix] fix data races for map access [#29][] (thanks @fsouza)
## v0.8.1 / 2013-01-09
* [Fix] Windows path separators
* [Doc] BSD License
## v0.8.0 / 2012-11-09
* kqueue: directory watching improvements (thanks @vmirage)
* inotify: add `IN_MOVED_TO` [#25][] (requested by @cpisto)
* [Fix] kqueue: deleting watched directory [#24][] (reported by @jakerr)
## v0.7.4 / 2012-10-09
* [Fix] inotify: fixes from https://codereview.appspot.com/5418045/ (ugorji)
* [Fix] kqueue: preserve watch flags when watching for delete [#21][] (reported by @robfig)
* [Fix] kqueue: watch the directory even if it isn't a new watch (thanks @robfig)
* [Fix] kqueue: modify after recreation of file
## v0.7.3 / 2012-09-27
* [Fix] kqueue: watch with an existing folder inside the watched folder (thanks @vmirage)
* [Fix] kqueue: no longer get duplicate CREATE events
## v0.7.2 / 2012-09-01
* kqueue: events for created directories
## v0.7.1 / 2012-07-14
* [Fix] for renaming files
## v0.7.0 / 2012-07-02
* [Feature] FSNotify flags
* [Fix] inotify: Added file name back to event path
## v0.6.0 / 2012-06-06
* kqueue: watch files after directory created (thanks @tmc)
## v0.5.1 / 2012-05-22
* [Fix] inotify: remove all watches before Close()
## v0.5.0 / 2012-05-03
* [API] kqueue: return errors during watch instead of sending over channel
* kqueue: match symlink behavior on Linux
* inotify: add `DELETE_SELF` (requested by @taralx)
* [Fix] kqueue: handle EINTR (reported by @robfig)
* [Doc] Godoc example [#1][] (thanks @davecheney)
## v0.4.0 / 2012-03-30
* Go 1 released: build with go tool
* [Feature] Windows support using winfsnotify
* Windows does not have attribute change notifications
* Roll attribute notifications into IsModify
## v0.3.0 / 2012-02-19
* kqueue: add files when watch directory
## v0.2.0 / 2011-12-30
* update to latest Go weekly code
## v0.1.0 / 2011-10-19
* kqueue: add watch on file creation to match inotify
* kqueue: create file event
* inotify: ignore `IN_IGNORED` events
* event String()
* linux: common FileEvent functions
* initial commit
[#79]: https://github.com/howeyc/fsnotify/pull/79
[#77]: https://github.com/howeyc/fsnotify/pull/77
[#72]: https://github.com/howeyc/fsnotify/issues/72
[#71]: https://github.com/howeyc/fsnotify/issues/71
[#70]: https://github.com/howeyc/fsnotify/issues/70
[#63]: https://github.com/howeyc/fsnotify/issues/63
[#62]: https://github.com/howeyc/fsnotify/issues/62
[#60]: https://github.com/howeyc/fsnotify/issues/60
[#59]: https://github.com/howeyc/fsnotify/issues/59
[#49]: https://github.com/howeyc/fsnotify/issues/49
[#45]: https://github.com/howeyc/fsnotify/issues/45
[#40]: https://github.com/howeyc/fsnotify/issues/40
[#36]: https://github.com/howeyc/fsnotify/issues/36
[#33]: https://github.com/howeyc/fsnotify/issues/33
[#29]: https://github.com/howeyc/fsnotify/issues/29
[#25]: https://github.com/howeyc/fsnotify/issues/25
[#24]: https://github.com/howeyc/fsnotify/issues/24
[#21]: https://github.com/howeyc/fsnotify/issues/21
[#1]: https://github.com/howeyc/fsnotify/issues/1

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# Contributing
## Moving Notice
There is a fork being actively developed with a new API in preparation for the Go Standard Library:
[github.com/go-fsnotify/fsnotify](https://github.com/go-fsnotify/fsnotify)

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Copyright (c) 2012 The Go Authors. All rights reserved.
Copyright (c) 2012 fsnotify Authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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# File system notifications for Go
[![GoDoc](https://godoc.org/github.com/howeyc/fsnotify?status.png)](http://godoc.org/github.com/howeyc/fsnotify)
Cross platform: Windows, Linux, BSD and OS X.
## Moving Notice
There is a fork being actively developed with a new API in preparation for the Go Standard Library:
[github.com/go-fsnotify/fsnotify](https://github.com/go-fsnotify/fsnotify)
## Example:
```go
package main
import (
"log"
"github.com/howeyc/fsnotify"
)
func main() {
watcher, err := fsnotify.NewWatcher()
if err != nil {
log.Fatal(err)
}
done := make(chan bool)
// Process events
go func() {
for {
select {
case ev := <-watcher.Event:
log.Println("event:", ev)
case err := <-watcher.Error:
log.Println("error:", err)
}
}
}()
err = watcher.Watch("testDir")
if err != nil {
log.Fatal(err)
}
// Hang so program doesn't exit
<-done
/* ... do stuff ... */
watcher.Close()
}
```
For each event:
* Name
* IsCreate()
* IsDelete()
* IsModify()
* IsRename()
## FAQ
**When a file is moved to another directory is it still being watched?**
No (it shouldn't be, unless you are watching where it was moved to).
**When I watch a directory, are all subdirectories watched as well?**
No, you must add watches for any directory you want to watch (a recursive watcher is in the works [#56][]).
**Do I have to watch the Error and Event channels in a separate goroutine?**
As of now, yes. Looking into making this single-thread friendly (see [#7][])
**Why am I receiving multiple events for the same file on OS X?**
Spotlight indexing on OS X can result in multiple events (see [#62][]). A temporary workaround is to add your folder(s) to the *Spotlight Privacy settings* until we have a native FSEvents implementation (see [#54][]).
**How many files can be watched at once?**
There are OS-specific limits as to how many watches can be created:
* Linux: /proc/sys/fs/inotify/max_user_watches contains the limit,
reaching this limit results in a "no space left on device" error.
* BSD / OSX: sysctl variables "kern.maxfiles" and "kern.maxfilesperproc", reaching these limits results in a "too many open files" error.
[#62]: https://github.com/howeyc/fsnotify/issues/62
[#56]: https://github.com/howeyc/fsnotify/issues/56
[#54]: https://github.com/howeyc/fsnotify/issues/54
[#7]: https://github.com/howeyc/fsnotify/issues/7

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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package fsnotify implements file system notification.
package fsnotify
import "fmt"
const (
FSN_CREATE = 1
FSN_MODIFY = 2
FSN_DELETE = 4
FSN_RENAME = 8
FSN_ALL = FSN_MODIFY | FSN_DELETE | FSN_RENAME | FSN_CREATE
)
// Purge events from interal chan to external chan if passes filter
func (w *Watcher) purgeEvents() {
for ev := range w.internalEvent {
sendEvent := false
w.fsnmut.Lock()
fsnFlags := w.fsnFlags[ev.Name]
w.fsnmut.Unlock()
if (fsnFlags&FSN_CREATE == FSN_CREATE) && ev.IsCreate() {
sendEvent = true
}
if (fsnFlags&FSN_MODIFY == FSN_MODIFY) && ev.IsModify() {
sendEvent = true
}
if (fsnFlags&FSN_DELETE == FSN_DELETE) && ev.IsDelete() {
sendEvent = true
}
if (fsnFlags&FSN_RENAME == FSN_RENAME) && ev.IsRename() {
sendEvent = true
}
if sendEvent {
w.Event <- ev
}
// If there's no file, then no more events for user
// BSD must keep watch for internal use (watches DELETEs to keep track
// what files exist for create events)
if ev.IsDelete() {
w.fsnmut.Lock()
delete(w.fsnFlags, ev.Name)
w.fsnmut.Unlock()
}
}
close(w.Event)
}
// Watch a given file path
func (w *Watcher) Watch(path string) error {
return w.WatchFlags(path, FSN_ALL)
}
// Watch a given file path for a particular set of notifications (FSN_MODIFY etc.)
func (w *Watcher) WatchFlags(path string, flags uint32) error {
w.fsnmut.Lock()
w.fsnFlags[path] = flags
w.fsnmut.Unlock()
return w.watch(path)
}
// Remove a watch on a file
func (w *Watcher) RemoveWatch(path string) error {
w.fsnmut.Lock()
delete(w.fsnFlags, path)
w.fsnmut.Unlock()
return w.removeWatch(path)
}
// String formats the event e in the form
// "filename: DELETE|MODIFY|..."
func (e *FileEvent) String() string {
var events string = ""
if e.IsCreate() {
events += "|" + "CREATE"
}
if e.IsDelete() {
events += "|" + "DELETE"
}
if e.IsModify() {
events += "|" + "MODIFY"
}
if e.IsRename() {
events += "|" + "RENAME"
}
if e.IsAttrib() {
events += "|" + "ATTRIB"
}
if len(events) > 0 {
events = events[1:]
}
return fmt.Sprintf("%q: %s", e.Name, events)
}

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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build freebsd openbsd netbsd dragonfly darwin
package fsnotify
import (
"errors"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"sync"
"syscall"
)
const (
// Flags (from <sys/event.h>)
sys_NOTE_DELETE = 0x0001 /* vnode was removed */
sys_NOTE_WRITE = 0x0002 /* data contents changed */
sys_NOTE_EXTEND = 0x0004 /* size increased */
sys_NOTE_ATTRIB = 0x0008 /* attributes changed */
sys_NOTE_LINK = 0x0010 /* link count changed */
sys_NOTE_RENAME = 0x0020 /* vnode was renamed */
sys_NOTE_REVOKE = 0x0040 /* vnode access was revoked */
// Watch all events
sys_NOTE_ALLEVENTS = sys_NOTE_DELETE | sys_NOTE_WRITE | sys_NOTE_ATTRIB | sys_NOTE_RENAME
// Block for 100 ms on each call to kevent
keventWaitTime = 100e6
)
type FileEvent struct {
mask uint32 // Mask of events
Name string // File name (optional)
create bool // set by fsnotify package if found new file
}
// IsCreate reports whether the FileEvent was triggered by a creation
func (e *FileEvent) IsCreate() bool { return e.create }
// IsDelete reports whether the FileEvent was triggered by a delete
func (e *FileEvent) IsDelete() bool { return (e.mask & sys_NOTE_DELETE) == sys_NOTE_DELETE }
// IsModify reports whether the FileEvent was triggered by a file modification
func (e *FileEvent) IsModify() bool {
return ((e.mask&sys_NOTE_WRITE) == sys_NOTE_WRITE || (e.mask&sys_NOTE_ATTRIB) == sys_NOTE_ATTRIB)
}
// IsRename reports whether the FileEvent was triggered by a change name
func (e *FileEvent) IsRename() bool { return (e.mask & sys_NOTE_RENAME) == sys_NOTE_RENAME }
// IsAttrib reports whether the FileEvent was triggered by a change in the file metadata.
func (e *FileEvent) IsAttrib() bool {
return (e.mask & sys_NOTE_ATTRIB) == sys_NOTE_ATTRIB
}
type Watcher struct {
mu sync.Mutex // Mutex for the Watcher itself.
kq int // File descriptor (as returned by the kqueue() syscall)
watches map[string]int // Map of watched file descriptors (key: path)
wmut sync.Mutex // Protects access to watches.
fsnFlags map[string]uint32 // Map of watched files to flags used for filter
fsnmut sync.Mutex // Protects access to fsnFlags.
enFlags map[string]uint32 // Map of watched files to evfilt note flags used in kqueue
enmut sync.Mutex // Protects access to enFlags.
paths map[int]string // Map of watched paths (key: watch descriptor)
finfo map[int]os.FileInfo // Map of file information (isDir, isReg; key: watch descriptor)
pmut sync.Mutex // Protects access to paths and finfo.
fileExists map[string]bool // Keep track of if we know this file exists (to stop duplicate create events)
femut sync.Mutex // Protects access to fileExists.
externalWatches map[string]bool // Map of watches added by user of the library.
ewmut sync.Mutex // Protects access to externalWatches.
Error chan error // Errors are sent on this channel
internalEvent chan *FileEvent // Events are queued on this channel
Event chan *FileEvent // Events are returned on this channel
done chan bool // Channel for sending a "quit message" to the reader goroutine
isClosed bool // Set to true when Close() is first called
}
// NewWatcher creates and returns a new kevent instance using kqueue(2)
func NewWatcher() (*Watcher, error) {
fd, errno := syscall.Kqueue()
if fd == -1 {
return nil, os.NewSyscallError("kqueue", errno)
}
w := &Watcher{
kq: fd,
watches: make(map[string]int),
fsnFlags: make(map[string]uint32),
enFlags: make(map[string]uint32),
paths: make(map[int]string),
finfo: make(map[int]os.FileInfo),
fileExists: make(map[string]bool),
externalWatches: make(map[string]bool),
internalEvent: make(chan *FileEvent),
Event: make(chan *FileEvent),
Error: make(chan error),
done: make(chan bool, 1),
}
go w.readEvents()
go w.purgeEvents()
return w, nil
}
// Close closes a kevent watcher instance
// It sends a message to the reader goroutine to quit and removes all watches
// associated with the kevent instance
func (w *Watcher) Close() error {
w.mu.Lock()
if w.isClosed {
w.mu.Unlock()
return nil
}
w.isClosed = true
w.mu.Unlock()
// Send "quit" message to the reader goroutine
w.done <- true
w.wmut.Lock()
ws := w.watches
w.wmut.Unlock()
for path := range ws {
w.removeWatch(path)
}
return nil
}
// AddWatch adds path to the watched file set.
// The flags are interpreted as described in kevent(2).
func (w *Watcher) addWatch(path string, flags uint32) error {
w.mu.Lock()
if w.isClosed {
w.mu.Unlock()
return errors.New("kevent instance already closed")
}
w.mu.Unlock()
watchDir := false
w.wmut.Lock()
watchfd, found := w.watches[path]
w.wmut.Unlock()
if !found {
fi, errstat := os.Lstat(path)
if errstat != nil {
return errstat
}
// don't watch socket
if fi.Mode()&os.ModeSocket == os.ModeSocket {
return nil
}
// Follow Symlinks
// Unfortunately, Linux can add bogus symlinks to watch list without
// issue, and Windows can't do symlinks period (AFAIK). To maintain
// consistency, we will act like everything is fine. There will simply
// be no file events for broken symlinks.
// Hence the returns of nil on errors.
if fi.Mode()&os.ModeSymlink == os.ModeSymlink {
path, err := filepath.EvalSymlinks(path)
if err != nil {
return nil
}
fi, errstat = os.Lstat(path)
if errstat != nil {
return nil
}
}
fd, errno := syscall.Open(path, open_FLAGS, 0700)
if fd == -1 {
return errno
}
watchfd = fd
w.wmut.Lock()
w.watches[path] = watchfd
w.wmut.Unlock()
w.pmut.Lock()
w.paths[watchfd] = path
w.finfo[watchfd] = fi
w.pmut.Unlock()
}
// Watch the directory if it has not been watched before.
w.pmut.Lock()
w.enmut.Lock()
if w.finfo[watchfd].IsDir() &&
(flags&sys_NOTE_WRITE) == sys_NOTE_WRITE &&
(!found || (w.enFlags[path]&sys_NOTE_WRITE) != sys_NOTE_WRITE) {
watchDir = true
}
w.enmut.Unlock()
w.pmut.Unlock()
w.enmut.Lock()
w.enFlags[path] = flags
w.enmut.Unlock()
var kbuf [1]syscall.Kevent_t
watchEntry := &kbuf[0]
watchEntry.Fflags = flags
syscall.SetKevent(watchEntry, watchfd, syscall.EVFILT_VNODE, syscall.EV_ADD|syscall.EV_CLEAR)
entryFlags := watchEntry.Flags
success, errno := syscall.Kevent(w.kq, kbuf[:], nil, nil)
if success == -1 {
return errno
} else if (entryFlags & syscall.EV_ERROR) == syscall.EV_ERROR {
return errors.New("kevent add error")
}
if watchDir {
errdir := w.watchDirectoryFiles(path)
if errdir != nil {
return errdir
}
}
return nil
}
// Watch adds path to the watched file set, watching all events.
func (w *Watcher) watch(path string) error {
w.ewmut.Lock()
w.externalWatches[path] = true
w.ewmut.Unlock()
return w.addWatch(path, sys_NOTE_ALLEVENTS)
}
// RemoveWatch removes path from the watched file set.
func (w *Watcher) removeWatch(path string) error {
w.wmut.Lock()
watchfd, ok := w.watches[path]
w.wmut.Unlock()
if !ok {
return errors.New(fmt.Sprintf("can't remove non-existent kevent watch for: %s", path))
}
var kbuf [1]syscall.Kevent_t
watchEntry := &kbuf[0]
syscall.SetKevent(watchEntry, watchfd, syscall.EVFILT_VNODE, syscall.EV_DELETE)
entryFlags := watchEntry.Flags
success, errno := syscall.Kevent(w.kq, kbuf[:], nil, nil)
if success == -1 {
return os.NewSyscallError("kevent_rm_watch", errno)
} else if (entryFlags & syscall.EV_ERROR) == syscall.EV_ERROR {
return errors.New("kevent rm error")
}
syscall.Close(watchfd)
w.wmut.Lock()
delete(w.watches, path)
w.wmut.Unlock()
w.enmut.Lock()
delete(w.enFlags, path)
w.enmut.Unlock()
w.pmut.Lock()
delete(w.paths, watchfd)
fInfo := w.finfo[watchfd]
delete(w.finfo, watchfd)
w.pmut.Unlock()
// Find all watched paths that are in this directory that are not external.
if fInfo.IsDir() {
var pathsToRemove []string
w.pmut.Lock()
for _, wpath := range w.paths {
wdir, _ := filepath.Split(wpath)
if filepath.Clean(wdir) == filepath.Clean(path) {
w.ewmut.Lock()
if !w.externalWatches[wpath] {
pathsToRemove = append(pathsToRemove, wpath)
}
w.ewmut.Unlock()
}
}
w.pmut.Unlock()
for _, p := range pathsToRemove {
// Since these are internal, not much sense in propagating error
// to the user, as that will just confuse them with an error about
// a path they did not explicitly watch themselves.
w.removeWatch(p)
}
}
return nil
}
// readEvents reads from the kqueue file descriptor, converts the
// received events into Event objects and sends them via the Event channel
func (w *Watcher) readEvents() {
var (
eventbuf [10]syscall.Kevent_t // Event buffer
events []syscall.Kevent_t // Received events
twait *syscall.Timespec // Time to block waiting for events
n int // Number of events returned from kevent
errno error // Syscall errno
)
events = eventbuf[0:0]
twait = new(syscall.Timespec)
*twait = syscall.NsecToTimespec(keventWaitTime)
for {
// See if there is a message on the "done" channel
var done bool
select {
case done = <-w.done:
default:
}
// If "done" message is received
if done {
errno := syscall.Close(w.kq)
if errno != nil {
w.Error <- os.NewSyscallError("close", errno)
}
close(w.internalEvent)
close(w.Error)
return
}
// Get new events
if len(events) == 0 {
n, errno = syscall.Kevent(w.kq, nil, eventbuf[:], twait)
// EINTR is okay, basically the syscall was interrupted before
// timeout expired.
if errno != nil && errno != syscall.EINTR {
w.Error <- os.NewSyscallError("kevent", errno)
continue
}
// Received some events
if n > 0 {
events = eventbuf[0:n]
}
}
// Flush the events we received to the events channel
for len(events) > 0 {
fileEvent := new(FileEvent)
watchEvent := &events[0]
fileEvent.mask = uint32(watchEvent.Fflags)
w.pmut.Lock()
fileEvent.Name = w.paths[int(watchEvent.Ident)]
fileInfo := w.finfo[int(watchEvent.Ident)]
w.pmut.Unlock()
if fileInfo != nil && fileInfo.IsDir() && !fileEvent.IsDelete() {
// Double check to make sure the directory exist. This can happen when
// we do a rm -fr on a recursively watched folders and we receive a
// modification event first but the folder has been deleted and later
// receive the delete event
if _, err := os.Lstat(fileEvent.Name); os.IsNotExist(err) {
// mark is as delete event
fileEvent.mask |= sys_NOTE_DELETE
}
}
if fileInfo != nil && fileInfo.IsDir() && fileEvent.IsModify() && !fileEvent.IsDelete() {
w.sendDirectoryChangeEvents(fileEvent.Name)
} else {
// Send the event on the events channel
w.internalEvent <- fileEvent
}
// Move to next event
events = events[1:]
if fileEvent.IsRename() {
w.removeWatch(fileEvent.Name)
w.femut.Lock()
delete(w.fileExists, fileEvent.Name)
w.femut.Unlock()
}
if fileEvent.IsDelete() {
w.removeWatch(fileEvent.Name)
w.femut.Lock()
delete(w.fileExists, fileEvent.Name)
w.femut.Unlock()
// Look for a file that may have overwritten this
// (ie mv f1 f2 will delete f2 then create f2)
fileDir, _ := filepath.Split(fileEvent.Name)
fileDir = filepath.Clean(fileDir)
w.wmut.Lock()
_, found := w.watches[fileDir]
w.wmut.Unlock()
if found {
// make sure the directory exist before we watch for changes. When we
// do a recursive watch and perform rm -fr, the parent directory might
// have gone missing, ignore the missing directory and let the
// upcoming delete event remove the watch form the parent folder
if _, err := os.Lstat(fileDir); !os.IsNotExist(err) {
w.sendDirectoryChangeEvents(fileDir)
}
}
}
}
}
}
func (w *Watcher) watchDirectoryFiles(dirPath string) error {
// Get all files
files, err := ioutil.ReadDir(dirPath)
if err != nil {
return err
}
// Search for new files
for _, fileInfo := range files {
filePath := filepath.Join(dirPath, fileInfo.Name())
// Inherit fsnFlags from parent directory
w.fsnmut.Lock()
if flags, found := w.fsnFlags[dirPath]; found {
w.fsnFlags[filePath] = flags
} else {
w.fsnFlags[filePath] = FSN_ALL
}
w.fsnmut.Unlock()
if fileInfo.IsDir() == false {
// Watch file to mimic linux fsnotify
e := w.addWatch(filePath, sys_NOTE_ALLEVENTS)
if e != nil {
return e
}
} else {
// If the user is currently watching directory
// we want to preserve the flags used
w.enmut.Lock()
currFlags, found := w.enFlags[filePath]
w.enmut.Unlock()
var newFlags uint32 = sys_NOTE_DELETE
if found {
newFlags |= currFlags
}
// Linux gives deletes if not explicitly watching
e := w.addWatch(filePath, newFlags)
if e != nil {
return e
}
}
w.femut.Lock()
w.fileExists[filePath] = true
w.femut.Unlock()
}
return nil
}
// sendDirectoryEvents searches the directory for newly created files
// and sends them over the event channel. This functionality is to have
// the BSD version of fsnotify match linux fsnotify which provides a
// create event for files created in a watched directory.
func (w *Watcher) sendDirectoryChangeEvents(dirPath string) {
// Get all files
files, err := ioutil.ReadDir(dirPath)
if err != nil {
w.Error <- err
}
// Search for new files
for _, fileInfo := range files {
filePath := filepath.Join(dirPath, fileInfo.Name())
w.femut.Lock()
_, doesExist := w.fileExists[filePath]
w.femut.Unlock()
if !doesExist {
// Inherit fsnFlags from parent directory
w.fsnmut.Lock()
if flags, found := w.fsnFlags[dirPath]; found {
w.fsnFlags[filePath] = flags
} else {
w.fsnFlags[filePath] = FSN_ALL
}
w.fsnmut.Unlock()
// Send create event
fileEvent := new(FileEvent)
fileEvent.Name = filePath
fileEvent.create = true
w.internalEvent <- fileEvent
}
w.femut.Lock()
w.fileExists[filePath] = true
w.femut.Unlock()
}
w.watchDirectoryFiles(dirPath)
}

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vendor/github.com/howeyc/fsnotify/fsnotify_linux.go generated vendored Normal file
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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build linux
package fsnotify
import (
"errors"
"fmt"
"os"
"strings"
"sync"
"syscall"
"unsafe"
)
const (
// Options for inotify_init() are not exported
// sys_IN_CLOEXEC uint32 = syscall.IN_CLOEXEC
// sys_IN_NONBLOCK uint32 = syscall.IN_NONBLOCK
// Options for AddWatch
sys_IN_DONT_FOLLOW uint32 = syscall.IN_DONT_FOLLOW
sys_IN_ONESHOT uint32 = syscall.IN_ONESHOT
sys_IN_ONLYDIR uint32 = syscall.IN_ONLYDIR
// The "sys_IN_MASK_ADD" option is not exported, as AddWatch
// adds it automatically, if there is already a watch for the given path
// sys_IN_MASK_ADD uint32 = syscall.IN_MASK_ADD
// Events
sys_IN_ACCESS uint32 = syscall.IN_ACCESS
sys_IN_ALL_EVENTS uint32 = syscall.IN_ALL_EVENTS
sys_IN_ATTRIB uint32 = syscall.IN_ATTRIB
sys_IN_CLOSE uint32 = syscall.IN_CLOSE
sys_IN_CLOSE_NOWRITE uint32 = syscall.IN_CLOSE_NOWRITE
sys_IN_CLOSE_WRITE uint32 = syscall.IN_CLOSE_WRITE
sys_IN_CREATE uint32 = syscall.IN_CREATE
sys_IN_DELETE uint32 = syscall.IN_DELETE
sys_IN_DELETE_SELF uint32 = syscall.IN_DELETE_SELF
sys_IN_MODIFY uint32 = syscall.IN_MODIFY
sys_IN_MOVE uint32 = syscall.IN_MOVE
sys_IN_MOVED_FROM uint32 = syscall.IN_MOVED_FROM
sys_IN_MOVED_TO uint32 = syscall.IN_MOVED_TO
sys_IN_MOVE_SELF uint32 = syscall.IN_MOVE_SELF
sys_IN_OPEN uint32 = syscall.IN_OPEN
sys_AGNOSTIC_EVENTS = sys_IN_MOVED_TO | sys_IN_MOVED_FROM | sys_IN_CREATE | sys_IN_ATTRIB | sys_IN_MODIFY | sys_IN_MOVE_SELF | sys_IN_DELETE | sys_IN_DELETE_SELF
// Special events
sys_IN_ISDIR uint32 = syscall.IN_ISDIR
sys_IN_IGNORED uint32 = syscall.IN_IGNORED
sys_IN_Q_OVERFLOW uint32 = syscall.IN_Q_OVERFLOW
sys_IN_UNMOUNT uint32 = syscall.IN_UNMOUNT
)
type FileEvent struct {
mask uint32 // Mask of events
cookie uint32 // Unique cookie associating related events (for rename(2))
Name string // File name (optional)
}
// IsCreate reports whether the FileEvent was triggered by a creation
func (e *FileEvent) IsCreate() bool {
return (e.mask&sys_IN_CREATE) == sys_IN_CREATE || (e.mask&sys_IN_MOVED_TO) == sys_IN_MOVED_TO
}
// IsDelete reports whether the FileEvent was triggered by a delete
func (e *FileEvent) IsDelete() bool {
return (e.mask&sys_IN_DELETE_SELF) == sys_IN_DELETE_SELF || (e.mask&sys_IN_DELETE) == sys_IN_DELETE
}
// IsModify reports whether the FileEvent was triggered by a file modification or attribute change
func (e *FileEvent) IsModify() bool {
return ((e.mask&sys_IN_MODIFY) == sys_IN_MODIFY || (e.mask&sys_IN_ATTRIB) == sys_IN_ATTRIB)
}
// IsRename reports whether the FileEvent was triggered by a change name
func (e *FileEvent) IsRename() bool {
return ((e.mask&sys_IN_MOVE_SELF) == sys_IN_MOVE_SELF || (e.mask&sys_IN_MOVED_FROM) == sys_IN_MOVED_FROM)
}
// IsAttrib reports whether the FileEvent was triggered by a change in the file metadata.
func (e *FileEvent) IsAttrib() bool {
return (e.mask & sys_IN_ATTRIB) == sys_IN_ATTRIB
}
type watch struct {
wd uint32 // Watch descriptor (as returned by the inotify_add_watch() syscall)
flags uint32 // inotify flags of this watch (see inotify(7) for the list of valid flags)
}
type Watcher struct {
mu sync.Mutex // Map access
fd int // File descriptor (as returned by the inotify_init() syscall)
watches map[string]*watch // Map of inotify watches (key: path)
fsnFlags map[string]uint32 // Map of watched files to flags used for filter
fsnmut sync.Mutex // Protects access to fsnFlags.
paths map[int]string // Map of watched paths (key: watch descriptor)
Error chan error // Errors are sent on this channel
internalEvent chan *FileEvent // Events are queued on this channel
Event chan *FileEvent // Events are returned on this channel
done chan bool // Channel for sending a "quit message" to the reader goroutine
isClosed bool // Set to true when Close() is first called
}
// NewWatcher creates and returns a new inotify instance using inotify_init(2)
func NewWatcher() (*Watcher, error) {
fd, errno := syscall.InotifyInit()
if fd == -1 {
return nil, os.NewSyscallError("inotify_init", errno)
}
w := &Watcher{
fd: fd,
watches: make(map[string]*watch),
fsnFlags: make(map[string]uint32),
paths: make(map[int]string),
internalEvent: make(chan *FileEvent),
Event: make(chan *FileEvent),
Error: make(chan error),
done: make(chan bool, 1),
}
go w.readEvents()
go w.purgeEvents()
return w, nil
}
// Close closes an inotify watcher instance
// It sends a message to the reader goroutine to quit and removes all watches
// associated with the inotify instance
func (w *Watcher) Close() error {
if w.isClosed {
return nil
}
w.isClosed = true
// Remove all watches
for path := range w.watches {
w.RemoveWatch(path)
}
// Send "quit" message to the reader goroutine
w.done <- true
return nil
}
// AddWatch adds path to the watched file set.
// The flags are interpreted as described in inotify_add_watch(2).
func (w *Watcher) addWatch(path string, flags uint32) error {
if w.isClosed {
return errors.New("inotify instance already closed")
}
w.mu.Lock()
watchEntry, found := w.watches[path]
w.mu.Unlock()
if found {
watchEntry.flags |= flags
flags |= syscall.IN_MASK_ADD
}
wd, errno := syscall.InotifyAddWatch(w.fd, path, flags)
if wd == -1 {
return errno
}
w.mu.Lock()
w.watches[path] = &watch{wd: uint32(wd), flags: flags}
w.paths[wd] = path
w.mu.Unlock()
return nil
}
// Watch adds path to the watched file set, watching all events.
func (w *Watcher) watch(path string) error {
return w.addWatch(path, sys_AGNOSTIC_EVENTS)
}
// RemoveWatch removes path from the watched file set.
func (w *Watcher) removeWatch(path string) error {
w.mu.Lock()
defer w.mu.Unlock()
watch, ok := w.watches[path]
if !ok {
return errors.New(fmt.Sprintf("can't remove non-existent inotify watch for: %s", path))
}
success, errno := syscall.InotifyRmWatch(w.fd, watch.wd)
if success == -1 {
return os.NewSyscallError("inotify_rm_watch", errno)
}
delete(w.watches, path)
return nil
}
// readEvents reads from the inotify file descriptor, converts the
// received events into Event objects and sends them via the Event channel
func (w *Watcher) readEvents() {
var (
buf [syscall.SizeofInotifyEvent * 4096]byte // Buffer for a maximum of 4096 raw events
n int // Number of bytes read with read()
errno error // Syscall errno
)
for {
// See if there is a message on the "done" channel
select {
case <-w.done:
syscall.Close(w.fd)
close(w.internalEvent)
close(w.Error)
return
default:
}
n, errno = syscall.Read(w.fd, buf[:])
// If EOF is received
if n == 0 {
syscall.Close(w.fd)
close(w.internalEvent)
close(w.Error)
return
}
if n < 0 {
w.Error <- os.NewSyscallError("read", errno)
continue
}
if n < syscall.SizeofInotifyEvent {
w.Error <- errors.New("inotify: short read in readEvents()")
continue
}
var offset uint32 = 0
// We don't know how many events we just read into the buffer
// While the offset points to at least one whole event...
for offset <= uint32(n-syscall.SizeofInotifyEvent) {
// Point "raw" to the event in the buffer
raw := (*syscall.InotifyEvent)(unsafe.Pointer(&buf[offset]))
event := new(FileEvent)
event.mask = uint32(raw.Mask)
event.cookie = uint32(raw.Cookie)
nameLen := uint32(raw.Len)
// If the event happened to the watched directory or the watched file, the kernel
// doesn't append the filename to the event, but we would like to always fill the
// the "Name" field with a valid filename. We retrieve the path of the watch from
// the "paths" map.
w.mu.Lock()
event.Name = w.paths[int(raw.Wd)]
w.mu.Unlock()
watchedName := event.Name
if nameLen > 0 {
// Point "bytes" at the first byte of the filename
bytes := (*[syscall.PathMax]byte)(unsafe.Pointer(&buf[offset+syscall.SizeofInotifyEvent]))
// The filename is padded with NUL bytes. TrimRight() gets rid of those.
event.Name += "/" + strings.TrimRight(string(bytes[0:nameLen]), "\000")
}
// Send the events that are not ignored on the events channel
if !event.ignoreLinux() {
// Setup FSNotify flags (inherit from directory watch)
w.fsnmut.Lock()
if _, fsnFound := w.fsnFlags[event.Name]; !fsnFound {
if fsnFlags, watchFound := w.fsnFlags[watchedName]; watchFound {
w.fsnFlags[event.Name] = fsnFlags
} else {
w.fsnFlags[event.Name] = FSN_ALL
}
}
w.fsnmut.Unlock()
w.internalEvent <- event
}
// Move to the next event in the buffer
offset += syscall.SizeofInotifyEvent + nameLen
}
}
}
// Certain types of events can be "ignored" and not sent over the Event
// channel. Such as events marked ignore by the kernel, or MODIFY events
// against files that do not exist.
func (e *FileEvent) ignoreLinux() bool {
// Ignore anything the inotify API says to ignore
if e.mask&sys_IN_IGNORED == sys_IN_IGNORED {
return true
}
// If the event is not a DELETE or RENAME, the file must exist.
// Otherwise the event is ignored.
// *Note*: this was put in place because it was seen that a MODIFY
// event was sent after the DELETE. This ignores that MODIFY and
// assumes a DELETE will come or has come if the file doesn't exist.
if !(e.IsDelete() || e.IsRename()) {
_, statErr := os.Lstat(e.Name)
return os.IsNotExist(statErr)
}
return false
}

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vendor/github.com/howeyc/fsnotify/fsnotify_open_bsd.go generated vendored Normal file
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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build freebsd openbsd netbsd dragonfly
package fsnotify
import "syscall"
const open_FLAGS = syscall.O_NONBLOCK | syscall.O_RDONLY

11
vendor/github.com/howeyc/fsnotify/fsnotify_open_darwin.go generated vendored Normal file
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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build darwin
package fsnotify
import "syscall"
const open_FLAGS = syscall.O_EVTONLY

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vendor/github.com/howeyc/fsnotify/fsnotify_windows.go generated vendored Normal file
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build windows
package fsnotify
import (
"errors"
"fmt"
"os"
"path/filepath"
"runtime"
"sync"
"syscall"
"unsafe"
)
const (
// Options for AddWatch
sys_FS_ONESHOT = 0x80000000
sys_FS_ONLYDIR = 0x1000000
// Events
sys_FS_ACCESS = 0x1
sys_FS_ALL_EVENTS = 0xfff
sys_FS_ATTRIB = 0x4
sys_FS_CLOSE = 0x18
sys_FS_CREATE = 0x100
sys_FS_DELETE = 0x200
sys_FS_DELETE_SELF = 0x400
sys_FS_MODIFY = 0x2
sys_FS_MOVE = 0xc0
sys_FS_MOVED_FROM = 0x40
sys_FS_MOVED_TO = 0x80
sys_FS_MOVE_SELF = 0x800
// Special events
sys_FS_IGNORED = 0x8000
sys_FS_Q_OVERFLOW = 0x4000
)
const (
// TODO(nj): Use syscall.ERROR_MORE_DATA from ztypes_windows in Go 1.3+
sys_ERROR_MORE_DATA syscall.Errno = 234
)
// Event is the type of the notification messages
// received on the watcher's Event channel.
type FileEvent struct {
mask uint32 // Mask of events
cookie uint32 // Unique cookie associating related events (for rename)
Name string // File name (optional)
}
// IsCreate reports whether the FileEvent was triggered by a creation
func (e *FileEvent) IsCreate() bool { return (e.mask & sys_FS_CREATE) == sys_FS_CREATE }
// IsDelete reports whether the FileEvent was triggered by a delete
func (e *FileEvent) IsDelete() bool {
return ((e.mask&sys_FS_DELETE) == sys_FS_DELETE || (e.mask&sys_FS_DELETE_SELF) == sys_FS_DELETE_SELF)
}
// IsModify reports whether the FileEvent was triggered by a file modification or attribute change
func (e *FileEvent) IsModify() bool {
return ((e.mask&sys_FS_MODIFY) == sys_FS_MODIFY || (e.mask&sys_FS_ATTRIB) == sys_FS_ATTRIB)
}
// IsRename reports whether the FileEvent was triggered by a change name
func (e *FileEvent) IsRename() bool {
return ((e.mask&sys_FS_MOVE) == sys_FS_MOVE || (e.mask&sys_FS_MOVE_SELF) == sys_FS_MOVE_SELF || (e.mask&sys_FS_MOVED_FROM) == sys_FS_MOVED_FROM || (e.mask&sys_FS_MOVED_TO) == sys_FS_MOVED_TO)
}
// IsAttrib reports whether the FileEvent was triggered by a change in the file metadata.
func (e *FileEvent) IsAttrib() bool {
return (e.mask & sys_FS_ATTRIB) == sys_FS_ATTRIB
}
const (
opAddWatch = iota
opRemoveWatch
)
const (
provisional uint64 = 1 << (32 + iota)
)
type input struct {
op int
path string
flags uint32
reply chan error
}
type inode struct {
handle syscall.Handle
volume uint32
index uint64
}
type watch struct {
ov syscall.Overlapped
ino *inode // i-number
path string // Directory path
mask uint64 // Directory itself is being watched with these notify flags
names map[string]uint64 // Map of names being watched and their notify flags
rename string // Remembers the old name while renaming a file
buf [4096]byte
}
type indexMap map[uint64]*watch
type watchMap map[uint32]indexMap
// A Watcher waits for and receives event notifications
// for a specific set of files and directories.
type Watcher struct {
mu sync.Mutex // Map access
port syscall.Handle // Handle to completion port
watches watchMap // Map of watches (key: i-number)
fsnFlags map[string]uint32 // Map of watched files to flags used for filter
fsnmut sync.Mutex // Protects access to fsnFlags.
input chan *input // Inputs to the reader are sent on this channel
internalEvent chan *FileEvent // Events are queued on this channel
Event chan *FileEvent // Events are returned on this channel
Error chan error // Errors are sent on this channel
isClosed bool // Set to true when Close() is first called
quit chan chan<- error
cookie uint32
}
// NewWatcher creates and returns a Watcher.
func NewWatcher() (*Watcher, error) {
port, e := syscall.CreateIoCompletionPort(syscall.InvalidHandle, 0, 0, 0)
if e != nil {
return nil, os.NewSyscallError("CreateIoCompletionPort", e)
}
w := &Watcher{
port: port,
watches: make(watchMap),
fsnFlags: make(map[string]uint32),
input: make(chan *input, 1),
Event: make(chan *FileEvent, 50),
internalEvent: make(chan *FileEvent),
Error: make(chan error),
quit: make(chan chan<- error, 1),
}
go w.readEvents()
go w.purgeEvents()
return w, nil
}
// Close closes a Watcher.
// It sends a message to the reader goroutine to quit and removes all watches
// associated with the watcher.
func (w *Watcher) Close() error {
if w.isClosed {
return nil
}
w.isClosed = true
// Send "quit" message to the reader goroutine
ch := make(chan error)
w.quit <- ch
if err := w.wakeupReader(); err != nil {
return err
}
return <-ch
}
// AddWatch adds path to the watched file set.
func (w *Watcher) AddWatch(path string, flags uint32) error {
if w.isClosed {
return errors.New("watcher already closed")
}
in := &input{
op: opAddWatch,
path: filepath.Clean(path),
flags: flags,
reply: make(chan error),
}
w.input <- in
if err := w.wakeupReader(); err != nil {
return err
}
return <-in.reply
}
// Watch adds path to the watched file set, watching all events.
func (w *Watcher) watch(path string) error {
return w.AddWatch(path, sys_FS_ALL_EVENTS)
}
// RemoveWatch removes path from the watched file set.
func (w *Watcher) removeWatch(path string) error {
in := &input{
op: opRemoveWatch,
path: filepath.Clean(path),
reply: make(chan error),
}
w.input <- in
if err := w.wakeupReader(); err != nil {
return err
}
return <-in.reply
}
func (w *Watcher) wakeupReader() error {
e := syscall.PostQueuedCompletionStatus(w.port, 0, 0, nil)
if e != nil {
return os.NewSyscallError("PostQueuedCompletionStatus", e)
}
return nil
}
func getDir(pathname string) (dir string, err error) {
attr, e := syscall.GetFileAttributes(syscall.StringToUTF16Ptr(pathname))
if e != nil {
return "", os.NewSyscallError("GetFileAttributes", e)
}
if attr&syscall.FILE_ATTRIBUTE_DIRECTORY != 0 {
dir = pathname
} else {
dir, _ = filepath.Split(pathname)
dir = filepath.Clean(dir)
}
return
}
func getIno(path string) (ino *inode, err error) {
h, e := syscall.CreateFile(syscall.StringToUTF16Ptr(path),
syscall.FILE_LIST_DIRECTORY,
syscall.FILE_SHARE_READ|syscall.FILE_SHARE_WRITE|syscall.FILE_SHARE_DELETE,
nil, syscall.OPEN_EXISTING,
syscall.FILE_FLAG_BACKUP_SEMANTICS|syscall.FILE_FLAG_OVERLAPPED, 0)
if e != nil {
return nil, os.NewSyscallError("CreateFile", e)
}
var fi syscall.ByHandleFileInformation
if e = syscall.GetFileInformationByHandle(h, &fi); e != nil {
syscall.CloseHandle(h)
return nil, os.NewSyscallError("GetFileInformationByHandle", e)
}
ino = &inode{
handle: h,
volume: fi.VolumeSerialNumber,
index: uint64(fi.FileIndexHigh)<<32 | uint64(fi.FileIndexLow),
}
return ino, nil
}
// Must run within the I/O thread.
func (m watchMap) get(ino *inode) *watch {
if i := m[ino.volume]; i != nil {
return i[ino.index]
}
return nil
}
// Must run within the I/O thread.
func (m watchMap) set(ino *inode, watch *watch) {
i := m[ino.volume]
if i == nil {
i = make(indexMap)
m[ino.volume] = i
}
i[ino.index] = watch
}
// Must run within the I/O thread.
func (w *Watcher) addWatch(pathname string, flags uint64) error {
dir, err := getDir(pathname)
if err != nil {
return err
}
if flags&sys_FS_ONLYDIR != 0 && pathname != dir {
return nil
}
ino, err := getIno(dir)
if err != nil {
return err
}
w.mu.Lock()
watchEntry := w.watches.get(ino)
w.mu.Unlock()
if watchEntry == nil {
if _, e := syscall.CreateIoCompletionPort(ino.handle, w.port, 0, 0); e != nil {
syscall.CloseHandle(ino.handle)
return os.NewSyscallError("CreateIoCompletionPort", e)
}
watchEntry = &watch{
ino: ino,
path: dir,
names: make(map[string]uint64),
}
w.mu.Lock()
w.watches.set(ino, watchEntry)
w.mu.Unlock()
flags |= provisional
} else {
syscall.CloseHandle(ino.handle)
}
if pathname == dir {
watchEntry.mask |= flags
} else {
watchEntry.names[filepath.Base(pathname)] |= flags
}
if err = w.startRead(watchEntry); err != nil {
return err
}
if pathname == dir {
watchEntry.mask &= ^provisional
} else {
watchEntry.names[filepath.Base(pathname)] &= ^provisional
}
return nil
}
// Must run within the I/O thread.
func (w *Watcher) remWatch(pathname string) error {
dir, err := getDir(pathname)
if err != nil {
return err
}
ino, err := getIno(dir)
if err != nil {
return err
}
w.mu.Lock()
watch := w.watches.get(ino)
w.mu.Unlock()
if watch == nil {
return fmt.Errorf("can't remove non-existent watch for: %s", pathname)
}
if pathname == dir {
w.sendEvent(watch.path, watch.mask&sys_FS_IGNORED)
watch.mask = 0
} else {
name := filepath.Base(pathname)
w.sendEvent(watch.path+"\\"+name, watch.names[name]&sys_FS_IGNORED)
delete(watch.names, name)
}
return w.startRead(watch)
}
// Must run within the I/O thread.
func (w *Watcher) deleteWatch(watch *watch) {
for name, mask := range watch.names {
if mask&provisional == 0 {
w.sendEvent(watch.path+"\\"+name, mask&sys_FS_IGNORED)
}
delete(watch.names, name)
}
if watch.mask != 0 {
if watch.mask&provisional == 0 {
w.sendEvent(watch.path, watch.mask&sys_FS_IGNORED)
}
watch.mask = 0
}
}
// Must run within the I/O thread.
func (w *Watcher) startRead(watch *watch) error {
if e := syscall.CancelIo(watch.ino.handle); e != nil {
w.Error <- os.NewSyscallError("CancelIo", e)
w.deleteWatch(watch)
}
mask := toWindowsFlags(watch.mask)
for _, m := range watch.names {
mask |= toWindowsFlags(m)
}
if mask == 0 {
if e := syscall.CloseHandle(watch.ino.handle); e != nil {
w.Error <- os.NewSyscallError("CloseHandle", e)
}
w.mu.Lock()
delete(w.watches[watch.ino.volume], watch.ino.index)
w.mu.Unlock()
return nil
}
e := syscall.ReadDirectoryChanges(watch.ino.handle, &watch.buf[0],
uint32(unsafe.Sizeof(watch.buf)), false, mask, nil, &watch.ov, 0)
if e != nil {
err := os.NewSyscallError("ReadDirectoryChanges", e)
if e == syscall.ERROR_ACCESS_DENIED && watch.mask&provisional == 0 {
// Watched directory was probably removed
if w.sendEvent(watch.path, watch.mask&sys_FS_DELETE_SELF) {
if watch.mask&sys_FS_ONESHOT != 0 {
watch.mask = 0
}
}
err = nil
}
w.deleteWatch(watch)
w.startRead(watch)
return err
}
return nil
}
// readEvents reads from the I/O completion port, converts the
// received events into Event objects and sends them via the Event channel.
// Entry point to the I/O thread.
func (w *Watcher) readEvents() {
var (
n, key uint32
ov *syscall.Overlapped
)
runtime.LockOSThread()
for {
e := syscall.GetQueuedCompletionStatus(w.port, &n, &key, &ov, syscall.INFINITE)
watch := (*watch)(unsafe.Pointer(ov))
if watch == nil {
select {
case ch := <-w.quit:
w.mu.Lock()
var indexes []indexMap
for _, index := range w.watches {
indexes = append(indexes, index)
}
w.mu.Unlock()
for _, index := range indexes {
for _, watch := range index {
w.deleteWatch(watch)
w.startRead(watch)
}
}
var err error
if e := syscall.CloseHandle(w.port); e != nil {
err = os.NewSyscallError("CloseHandle", e)
}
close(w.internalEvent)
close(w.Error)
ch <- err
return
case in := <-w.input:
switch in.op {
case opAddWatch:
in.reply <- w.addWatch(in.path, uint64(in.flags))
case opRemoveWatch:
in.reply <- w.remWatch(in.path)
}
default:
}
continue
}
switch e {
case sys_ERROR_MORE_DATA:
if watch == nil {
w.Error <- errors.New("ERROR_MORE_DATA has unexpectedly null lpOverlapped buffer")
} else {
// The i/o succeeded but the buffer is full.
// In theory we should be building up a full packet.
// In practice we can get away with just carrying on.
n = uint32(unsafe.Sizeof(watch.buf))
}
case syscall.ERROR_ACCESS_DENIED:
// Watched directory was probably removed
w.sendEvent(watch.path, watch.mask&sys_FS_DELETE_SELF)
w.deleteWatch(watch)
w.startRead(watch)
continue
case syscall.ERROR_OPERATION_ABORTED:
// CancelIo was called on this handle
continue
default:
w.Error <- os.NewSyscallError("GetQueuedCompletionPort", e)
continue
case nil:
}
var offset uint32
for {
if n == 0 {
w.internalEvent <- &FileEvent{mask: sys_FS_Q_OVERFLOW}
w.Error <- errors.New("short read in readEvents()")
break
}
// Point "raw" to the event in the buffer
raw := (*syscall.FileNotifyInformation)(unsafe.Pointer(&watch.buf[offset]))
buf := (*[syscall.MAX_PATH]uint16)(unsafe.Pointer(&raw.FileName))
name := syscall.UTF16ToString(buf[:raw.FileNameLength/2])
fullname := watch.path + "\\" + name
var mask uint64
switch raw.Action {
case syscall.FILE_ACTION_REMOVED:
mask = sys_FS_DELETE_SELF
case syscall.FILE_ACTION_MODIFIED:
mask = sys_FS_MODIFY
case syscall.FILE_ACTION_RENAMED_OLD_NAME:
watch.rename = name
case syscall.FILE_ACTION_RENAMED_NEW_NAME:
if watch.names[watch.rename] != 0 {
watch.names[name] |= watch.names[watch.rename]
delete(watch.names, watch.rename)
mask = sys_FS_MOVE_SELF
}
}
sendNameEvent := func() {
if w.sendEvent(fullname, watch.names[name]&mask) {
if watch.names[name]&sys_FS_ONESHOT != 0 {
delete(watch.names, name)
}
}
}
if raw.Action != syscall.FILE_ACTION_RENAMED_NEW_NAME {
sendNameEvent()
}
if raw.Action == syscall.FILE_ACTION_REMOVED {
w.sendEvent(fullname, watch.names[name]&sys_FS_IGNORED)
delete(watch.names, name)
}
if w.sendEvent(fullname, watch.mask&toFSnotifyFlags(raw.Action)) {
if watch.mask&sys_FS_ONESHOT != 0 {
watch.mask = 0
}
}
if raw.Action == syscall.FILE_ACTION_RENAMED_NEW_NAME {
fullname = watch.path + "\\" + watch.rename
sendNameEvent()
}
// Move to the next event in the buffer
if raw.NextEntryOffset == 0 {
break
}
offset += raw.NextEntryOffset
// Error!
if offset >= n {
w.Error <- errors.New("Windows system assumed buffer larger than it is, events have likely been missed.")
break
}
}
if err := w.startRead(watch); err != nil {
w.Error <- err
}
}
}
func (w *Watcher) sendEvent(name string, mask uint64) bool {
if mask == 0 {
return false
}
event := &FileEvent{mask: uint32(mask), Name: name}
if mask&sys_FS_MOVE != 0 {
if mask&sys_FS_MOVED_FROM != 0 {
w.cookie++
}
event.cookie = w.cookie
}
select {
case ch := <-w.quit:
w.quit <- ch
case w.Event <- event:
}
return true
}
func toWindowsFlags(mask uint64) uint32 {
var m uint32
if mask&sys_FS_ACCESS != 0 {
m |= syscall.FILE_NOTIFY_CHANGE_LAST_ACCESS
}
if mask&sys_FS_MODIFY != 0 {
m |= syscall.FILE_NOTIFY_CHANGE_LAST_WRITE
}
if mask&sys_FS_ATTRIB != 0 {
m |= syscall.FILE_NOTIFY_CHANGE_ATTRIBUTES
}
if mask&(sys_FS_MOVE|sys_FS_CREATE|sys_FS_DELETE) != 0 {
m |= syscall.FILE_NOTIFY_CHANGE_FILE_NAME | syscall.FILE_NOTIFY_CHANGE_DIR_NAME
}
return m
}
func toFSnotifyFlags(action uint32) uint64 {
switch action {
case syscall.FILE_ACTION_ADDED:
return sys_FS_CREATE
case syscall.FILE_ACTION_REMOVED:
return sys_FS_DELETE
case syscall.FILE_ACTION_MODIFIED:
return sys_FS_MODIFY
case syscall.FILE_ACTION_RENAMED_OLD_NAME:
return sys_FS_MOVED_FROM
case syscall.FILE_ACTION_RENAMED_NEW_NAME:
return sys_FS_MOVED_TO
}
return 0
}

15
vendor/github.com/oschwald/maxminddb-golang/LICENSE generated vendored Normal file
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@ -0,0 +1,15 @@
ISC License
Copyright (c) 2015, Gregory J. Oschwald <oschwald@gmail.com>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.

38
vendor/github.com/oschwald/maxminddb-golang/README.md generated vendored Normal file
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# MaxMind DB Reader for Go #
[![Build Status](https://travis-ci.org/oschwald/maxminddb-golang.png?branch=master)](https://travis-ci.org/oschwald/maxminddb-golang)
[![Windows Build Status](https://ci.appveyor.com/api/projects/status/4j2f9oep8nnfrmov/branch/master?svg=true)](https://ci.appveyor.com/project/oschwald/maxminddb-golang/branch/master)
[![GoDoc](https://godoc.org/github.com/oschwald/maxminddb-golang?status.png)](https://godoc.org/github.com/oschwald/maxminddb-golang)
This is a Go reader for the MaxMind DB format. Although this can be used to
read [GeoLite2](http://dev.maxmind.com/geoip/geoip2/geolite2/) and
[GeoIP2](https://www.maxmind.com/en/geoip2-databases) databases,
[geoip2](https://github.com/oschwald/geoip2-golang) provides a higher-level
API for doing so.
This is not an official MaxMind API.
## Installation ##
```
go get github.com/oschwald/maxminddb-golang
```
## Usage ##
[See GoDoc](http://godoc.org/github.com/oschwald/maxminddb-golang) for
documentation and examples.
## Examples ##
See [GoDoc](http://godoc.org/github.com/oschwald/maxminddb-golang) or
`example_test.go` for examples.
## Contributing ##
Contributions welcome! Please fork the repository and open a pull request
with your changes.
## License ##
This is free software, licensed under the ISC License.

19
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@ -0,0 +1,19 @@
version: "{build}"
os: Windows Server 2012 R2
clone_folder: c:\gopath\src\github.com\oschwald\maxminddb-golang
environment:
GOPATH: c:\gopath
install:
- echo %PATH%
- echo %GOPATH%
- git submodule update --init --recursive
- go version
- go env
- go get -v -t ./...
build_script:
- go test -v ./...

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package maxminddb
import (
"encoding/binary"
"math"
"math/big"
"reflect"
"sync"
)
type decoder struct {
buffer []byte
}
type dataType int
const (
_Extended dataType = iota
_Pointer
_String
_Float64
_Bytes
_Uint16
_Uint32
_Map
_Int32
_Uint64
_Uint128
_Slice
_Container
_Marker
_Bool
_Float32
)
const (
// This is the value used in libmaxminddb
maximumDataStructureDepth = 512
)
func (d *decoder) decode(offset uint, result reflect.Value, depth int) (uint, error) {
if depth > maximumDataStructureDepth {
return 0, newInvalidDatabaseError("exceeded maximum data structure depth; database is likely corrupt")
}
typeNum, size, newOffset, err := d.decodeCtrlData(offset)
if err != nil {
return 0, err
}
if typeNum != _Pointer && result.Kind() == reflect.Uintptr {
result.Set(reflect.ValueOf(uintptr(offset)))
return d.nextValueOffset(offset, 1)
}
return d.decodeFromType(typeNum, size, newOffset, result, depth+1)
}
func (d *decoder) decodeCtrlData(offset uint) (dataType, uint, uint, error) {
newOffset := offset + 1
if offset >= uint(len(d.buffer)) {
return 0, 0, 0, newOffsetError()
}
ctrlByte := d.buffer[offset]
typeNum := dataType(ctrlByte >> 5)
if typeNum == _Extended {
if newOffset >= uint(len(d.buffer)) {
return 0, 0, 0, newOffsetError()
}
typeNum = dataType(d.buffer[newOffset] + 7)
newOffset++
}
var size uint
size, newOffset, err := d.sizeFromCtrlByte(ctrlByte, newOffset, typeNum)
return typeNum, size, newOffset, err
}
func (d *decoder) sizeFromCtrlByte(ctrlByte byte, offset uint, typeNum dataType) (uint, uint, error) {
size := uint(ctrlByte & 0x1f)
if typeNum == _Extended {
return size, offset, nil
}
var bytesToRead uint
if size < 29 {
return size, offset, nil
}
bytesToRead = size - 28
newOffset := offset + bytesToRead
if newOffset > uint(len(d.buffer)) {
return 0, 0, newOffsetError()
}
if size == 29 {
return 29 + uint(d.buffer[offset]), offset + 1, nil
}
sizeBytes := d.buffer[offset:newOffset]
switch {
case size == 30:
size = 285 + uintFromBytes(0, sizeBytes)
case size > 30:
size = uintFromBytes(0, sizeBytes) + 65821
}
return size, newOffset, nil
}
func (d *decoder) decodeFromType(
dtype dataType,
size uint,
offset uint,
result reflect.Value,
depth int,
) (uint, error) {
result = d.indirect(result)
// For these types, size has a special meaning
switch dtype {
case _Bool:
return d.unmarshalBool(size, offset, result)
case _Map:
return d.unmarshalMap(size, offset, result, depth)
case _Pointer:
return d.unmarshalPointer(size, offset, result, depth)
case _Slice:
return d.unmarshalSlice(size, offset, result, depth)
}
// For the remaining types, size is the byte size
if offset+size > uint(len(d.buffer)) {
return 0, newOffsetError()
}
switch dtype {
case _Bytes:
return d.unmarshalBytes(size, offset, result)
case _Float32:
return d.unmarshalFloat32(size, offset, result)
case _Float64:
return d.unmarshalFloat64(size, offset, result)
case _Int32:
return d.unmarshalInt32(size, offset, result)
case _String:
return d.unmarshalString(size, offset, result)
case _Uint16:
return d.unmarshalUint(size, offset, result, 16)
case _Uint32:
return d.unmarshalUint(size, offset, result, 32)
case _Uint64:
return d.unmarshalUint(size, offset, result, 64)
case _Uint128:
return d.unmarshalUint128(size, offset, result)
default:
return 0, newInvalidDatabaseError("unknown type: %d", dtype)
}
}
func (d *decoder) unmarshalBool(size uint, offset uint, result reflect.Value) (uint, error) {
if size > 1 {
return 0, newInvalidDatabaseError("the MaxMind DB file's data section contains bad data (bool size of %v)", size)
}
value, newOffset, err := d.decodeBool(size, offset)
if err != nil {
return 0, err
}
switch result.Kind() {
case reflect.Bool:
result.SetBool(value)
return newOffset, nil
case reflect.Interface:
if result.NumMethod() == 0 {
result.Set(reflect.ValueOf(value))
return newOffset, nil
}
}
return newOffset, newUnmarshalTypeError(value, result.Type())
}
// indirect follows pointers and create values as necessary. This is
// heavily based on encoding/json as my original version had a subtle
// bug. This method should be considered to be licensed under
// https://golang.org/LICENSE
func (d *decoder) indirect(result reflect.Value) reflect.Value {
for {
// Load value from interface, but only if the result will be
// usefully addressable.
if result.Kind() == reflect.Interface && !result.IsNil() {
e := result.Elem()
if e.Kind() == reflect.Ptr && !e.IsNil() {
result = e
continue
}
}
if result.Kind() != reflect.Ptr {
break
}
if result.IsNil() {
result.Set(reflect.New(result.Type().Elem()))
}
result = result.Elem()
}
return result
}
var sliceType = reflect.TypeOf([]byte{})
func (d *decoder) unmarshalBytes(size uint, offset uint, result reflect.Value) (uint, error) {
value, newOffset, err := d.decodeBytes(size, offset)
if err != nil {
return 0, err
}
switch result.Kind() {
case reflect.Slice:
if result.Type() == sliceType {
result.SetBytes(value)
return newOffset, nil
}
case reflect.Interface:
if result.NumMethod() == 0 {
result.Set(reflect.ValueOf(value))
return newOffset, nil
}
}
return newOffset, newUnmarshalTypeError(value, result.Type())
}
func (d *decoder) unmarshalFloat32(size uint, offset uint, result reflect.Value) (uint, error) {
if size != 4 {
return 0, newInvalidDatabaseError("the MaxMind DB file's data section contains bad data (float32 size of %v)", size)
}
value, newOffset, err := d.decodeFloat32(size, offset)
if err != nil {
return 0, err
}
switch result.Kind() {
case reflect.Float32, reflect.Float64:
result.SetFloat(float64(value))
return newOffset, nil
case reflect.Interface:
if result.NumMethod() == 0 {
result.Set(reflect.ValueOf(value))
return newOffset, nil
}
}
return newOffset, newUnmarshalTypeError(value, result.Type())
}
func (d *decoder) unmarshalFloat64(size uint, offset uint, result reflect.Value) (uint, error) {
if size != 8 {
return 0, newInvalidDatabaseError("the MaxMind DB file's data section contains bad data (float 64 size of %v)", size)
}
value, newOffset, err := d.decodeFloat64(size, offset)
if err != nil {
return 0, err
}
switch result.Kind() {
case reflect.Float32, reflect.Float64:
if result.OverflowFloat(value) {
return 0, newUnmarshalTypeError(value, result.Type())
}
result.SetFloat(value)
return newOffset, nil
case reflect.Interface:
if result.NumMethod() == 0 {
result.Set(reflect.ValueOf(value))
return newOffset, nil
}
}
return newOffset, newUnmarshalTypeError(value, result.Type())
}
func (d *decoder) unmarshalInt32(size uint, offset uint, result reflect.Value) (uint, error) {
if size > 4 {
return 0, newInvalidDatabaseError("the MaxMind DB file's data section contains bad data (int32 size of %v)", size)
}
value, newOffset, err := d.decodeInt(size, offset)
if err != nil {
return 0, err
}
switch result.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
n := int64(value)
if !result.OverflowInt(n) {
result.SetInt(n)
return newOffset, nil
}
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
n := uint64(value)
if !result.OverflowUint(n) {
result.SetUint(n)
return newOffset, nil
}
case reflect.Interface:
if result.NumMethod() == 0 {
result.Set(reflect.ValueOf(value))
return newOffset, nil
}
}
return newOffset, newUnmarshalTypeError(value, result.Type())
}
func (d *decoder) unmarshalMap(
size uint,
offset uint,
result reflect.Value,
depth int,
) (uint, error) {
result = d.indirect(result)
switch result.Kind() {
default:
return 0, newUnmarshalTypeError("map", result.Type())
case reflect.Struct:
return d.decodeStruct(size, offset, result, depth)
case reflect.Map:
return d.decodeMap(size, offset, result, depth)
case reflect.Interface:
if result.NumMethod() == 0 {
rv := reflect.ValueOf(make(map[string]interface{}, size))
newOffset, err := d.decodeMap(size, offset, rv, depth)
result.Set(rv)
return newOffset, err
}
return 0, newUnmarshalTypeError("map", result.Type())
}
}
func (d *decoder) unmarshalPointer(size uint, offset uint, result reflect.Value, depth int) (uint, error) {
pointer, newOffset, err := d.decodePointer(size, offset)
if err != nil {
return 0, err
}
_, err = d.decode(pointer, result, depth)
return newOffset, err
}
func (d *decoder) unmarshalSlice(
size uint,
offset uint,
result reflect.Value,
depth int,
) (uint, error) {
switch result.Kind() {
case reflect.Slice:
return d.decodeSlice(size, offset, result, depth)
case reflect.Interface:
if result.NumMethod() == 0 {
a := []interface{}{}
rv := reflect.ValueOf(&a).Elem()
newOffset, err := d.decodeSlice(size, offset, rv, depth)
result.Set(rv)
return newOffset, err
}
}
return 0, newUnmarshalTypeError("array", result.Type())
}
func (d *decoder) unmarshalString(size uint, offset uint, result reflect.Value) (uint, error) {
value, newOffset, err := d.decodeString(size, offset)
if err != nil {
return 0, err
}
switch result.Kind() {
case reflect.String:
result.SetString(value)
return newOffset, nil
case reflect.Interface:
if result.NumMethod() == 0 {
result.Set(reflect.ValueOf(value))
return newOffset, nil
}
}
return newOffset, newUnmarshalTypeError(value, result.Type())
}
func (d *decoder) unmarshalUint(size uint, offset uint, result reflect.Value, uintType uint) (uint, error) {
if size > uintType/8 {
return 0, newInvalidDatabaseError("the MaxMind DB file's data section contains bad data (uint%v size of %v)", uintType, size)
}
value, newOffset, err := d.decodeUint(size, offset)
if err != nil {
return 0, err
}
switch result.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
n := int64(value)
if !result.OverflowInt(n) {
result.SetInt(n)
return newOffset, nil
}
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
if !result.OverflowUint(value) {
result.SetUint(value)
return newOffset, nil
}
case reflect.Interface:
if result.NumMethod() == 0 {
result.Set(reflect.ValueOf(value))
return newOffset, nil
}
}
return newOffset, newUnmarshalTypeError(value, result.Type())
}
var bigIntType = reflect.TypeOf(big.Int{})
func (d *decoder) unmarshalUint128(size uint, offset uint, result reflect.Value) (uint, error) {
if size > 16 {
return 0, newInvalidDatabaseError("the MaxMind DB file's data section contains bad data (uint128 size of %v)", size)
}
value, newOffset, err := d.decodeUint128(size, offset)
if err != nil {
return 0, err
}
switch result.Kind() {
case reflect.Struct:
if result.Type() == bigIntType {
result.Set(reflect.ValueOf(*value))
return newOffset, nil
}
case reflect.Interface:
if result.NumMethod() == 0 {
result.Set(reflect.ValueOf(value))
return newOffset, nil
}
}
return newOffset, newUnmarshalTypeError(value, result.Type())
}
func (d *decoder) decodeBool(size uint, offset uint) (bool, uint, error) {
return size != 0, offset, nil
}
func (d *decoder) decodeBytes(size uint, offset uint) ([]byte, uint, error) {
newOffset := offset + size
bytes := make([]byte, size)
copy(bytes, d.buffer[offset:newOffset])
return bytes, newOffset, nil
}
func (d *decoder) decodeFloat64(size uint, offset uint) (float64, uint, error) {
newOffset := offset + size
bits := binary.BigEndian.Uint64(d.buffer[offset:newOffset])
return math.Float64frombits(bits), newOffset, nil
}
func (d *decoder) decodeFloat32(size uint, offset uint) (float32, uint, error) {
newOffset := offset + size
bits := binary.BigEndian.Uint32(d.buffer[offset:newOffset])
return math.Float32frombits(bits), newOffset, nil
}
func (d *decoder) decodeInt(size uint, offset uint) (int, uint, error) {
newOffset := offset + size
var val int32
for _, b := range d.buffer[offset:newOffset] {
val = (val << 8) | int32(b)
}
return int(val), newOffset, nil
}
func (d *decoder) decodeMap(
size uint,
offset uint,
result reflect.Value,
depth int,
) (uint, error) {
if result.IsNil() {
result.Set(reflect.MakeMap(result.Type()))
}
for i := uint(0); i < size; i++ {
var key []byte
var err error
key, offset, err = d.decodeKey(offset)
if err != nil {
return 0, err
}
value := reflect.New(result.Type().Elem())
offset, err = d.decode(offset, value, depth)
if err != nil {
return 0, err
}
result.SetMapIndex(reflect.ValueOf(string(key)), value.Elem())
}
return offset, nil
}
func (d *decoder) decodePointer(
size uint,
offset uint,
) (uint, uint, error) {
pointerSize := ((size >> 3) & 0x3) + 1
newOffset := offset + pointerSize
if newOffset > uint(len(d.buffer)) {
return 0, 0, newOffsetError()
}
pointerBytes := d.buffer[offset:newOffset]
var prefix uint
if pointerSize == 4 {
prefix = 0
} else {
prefix = uint(size & 0x7)
}
unpacked := uintFromBytes(prefix, pointerBytes)
var pointerValueOffset uint
switch pointerSize {
case 1:
pointerValueOffset = 0
case 2:
pointerValueOffset = 2048
case 3:
pointerValueOffset = 526336
case 4:
pointerValueOffset = 0
}
pointer := unpacked + pointerValueOffset
return pointer, newOffset, nil
}
func (d *decoder) decodeSlice(
size uint,
offset uint,
result reflect.Value,
depth int,
) (uint, error) {
result.Set(reflect.MakeSlice(result.Type(), int(size), int(size)))
for i := 0; i < int(size); i++ {
var err error
offset, err = d.decode(offset, result.Index(i), depth)
if err != nil {
return 0, err
}
}
return offset, nil
}
func (d *decoder) decodeString(size uint, offset uint) (string, uint, error) {
newOffset := offset + size
return string(d.buffer[offset:newOffset]), newOffset, nil
}
type fieldsType struct {
namedFields map[string]int
anonymousFields []int
}
var (
fieldMap = map[reflect.Type]*fieldsType{}
fieldMapMu sync.RWMutex
)
func (d *decoder) decodeStruct(
size uint,
offset uint,
result reflect.Value,
depth int,
) (uint, error) {
resultType := result.Type()
fieldMapMu.RLock()
fields, ok := fieldMap[resultType]
fieldMapMu.RUnlock()
if !ok {
numFields := resultType.NumField()
namedFields := make(map[string]int, numFields)
var anonymous []int
for i := 0; i < numFields; i++ {
field := resultType.Field(i)
fieldName := field.Name
if tag := field.Tag.Get("maxminddb"); tag != "" {
if tag == "-" {
continue
}
fieldName = tag
}
if field.Anonymous {
anonymous = append(anonymous, i)
continue
}
namedFields[fieldName] = i
}
fieldMapMu.Lock()
fields = &fieldsType{namedFields, anonymous}
fieldMap[resultType] = fields
fieldMapMu.Unlock()
}
// This fills in embedded structs
for _, i := range fields.anonymousFields {
_, err := d.unmarshalMap(size, offset, result.Field(i), depth)
if err != nil {
return 0, err
}
}
// This handles named fields
for i := uint(0); i < size; i++ {
var (
err error
key []byte
)
key, offset, err = d.decodeKey(offset)
if err != nil {
return 0, err
}
// The string() does not create a copy due to this compiler
// optimization: https://github.com/golang/go/issues/3512
j, ok := fields.namedFields[string(key)]
if !ok {
offset, err = d.nextValueOffset(offset, 1)
if err != nil {
return 0, err
}
continue
}
offset, err = d.decode(offset, result.Field(j), depth)
if err != nil {
return 0, err
}
}
return offset, nil
}
func (d *decoder) decodeUint(size uint, offset uint) (uint64, uint, error) {
newOffset := offset + size
bytes := d.buffer[offset:newOffset]
var val uint64
for _, b := range bytes {
val = (val << 8) | uint64(b)
}
return val, newOffset, nil
}
func (d *decoder) decodeUint128(size uint, offset uint) (*big.Int, uint, error) {
newOffset := offset + size
val := new(big.Int)
val.SetBytes(d.buffer[offset:newOffset])
return val, newOffset, nil
}
func uintFromBytes(prefix uint, uintBytes []byte) uint {
val := prefix
for _, b := range uintBytes {
val = (val << 8) | uint(b)
}
return val
}
// decodeKey decodes a map key into []byte slice. We use a []byte so that we
// can take advantage of https://github.com/golang/go/issues/3512 to avoid
// copying the bytes when decoding a struct. Previously, we achieved this by
// using unsafe.
func (d *decoder) decodeKey(offset uint) ([]byte, uint, error) {
typeNum, size, dataOffset, err := d.decodeCtrlData(offset)
if err != nil {
return nil, 0, err
}
if typeNum == _Pointer {
pointer, ptrOffset, err := d.decodePointer(size, dataOffset)
if err != nil {
return nil, 0, err
}
key, _, err := d.decodeKey(pointer)
return key, ptrOffset, err
}
if typeNum != _String {
return nil, 0, newInvalidDatabaseError("unexpected type when decoding string: %v", typeNum)
}
newOffset := dataOffset + size
if newOffset > uint(len(d.buffer)) {
return nil, 0, newOffsetError()
}
return d.buffer[dataOffset:newOffset], newOffset, nil
}
// This function is used to skip ahead to the next value without decoding
// the one at the offset passed in. The size bits have different meanings for
// different data types
func (d *decoder) nextValueOffset(offset uint, numberToSkip uint) (uint, error) {
if numberToSkip == 0 {
return offset, nil
}
typeNum, size, offset, err := d.decodeCtrlData(offset)
if err != nil {
return 0, err
}
switch typeNum {
case _Pointer:
_, offset, err = d.decodePointer(size, offset)
if err != nil {
return 0, err
}
case _Map:
numberToSkip += 2 * size
case _Slice:
numberToSkip += size
case _Bool:
default:
offset += size
}
return d.nextValueOffset(offset, numberToSkip-1)
}

42
vendor/github.com/oschwald/maxminddb-golang/errors.go generated vendored Normal file
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@ -0,0 +1,42 @@
package maxminddb
import (
"fmt"
"reflect"
)
// InvalidDatabaseError is returned when the database contains invalid data
// and cannot be parsed.
type InvalidDatabaseError struct {
message string
}
func newOffsetError() InvalidDatabaseError {
return InvalidDatabaseError{"unexpected end of database"}
}
func newInvalidDatabaseError(format string, args ...interface{}) InvalidDatabaseError {
return InvalidDatabaseError{fmt.Sprintf(format, args...)}
}
func (e InvalidDatabaseError) Error() string {
return e.message
}
// UnmarshalTypeError is returned when the value in the database cannot be
// assigned to the specified data type.
type UnmarshalTypeError struct {
Value string // stringified copy of the database value that caused the error
Type reflect.Type // type of the value that could not be assign to
}
func newUnmarshalTypeError(value interface{}, rType reflect.Type) UnmarshalTypeError {
return UnmarshalTypeError{
Value: fmt.Sprintf("%v", value),
Type: rType,
}
}
func (e UnmarshalTypeError) Error() string {
return fmt.Sprintf("maxminddb: cannot unmarshal %s into type %s", e.Value, e.Type.String())
}

15
vendor/github.com/oschwald/maxminddb-golang/mmap_unix.go generated vendored Normal file
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@ -0,0 +1,15 @@
// +build !windows,!appengine
package maxminddb
import (
"golang.org/x/sys/unix"
)
func mmap(fd int, length int) (data []byte, err error) {
return unix.Mmap(fd, 0, length, unix.PROT_READ, unix.MAP_SHARED)
}
func munmap(b []byte) (err error) {
return unix.Munmap(b)
}

85
vendor/github.com/oschwald/maxminddb-golang/mmap_windows.go generated vendored Normal file
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@ -0,0 +1,85 @@
// +build windows,!appengine
package maxminddb
// Windows support largely borrowed from mmap-go.
//
// Copyright 2011 Evan Shaw. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
import (
"errors"
"os"
"reflect"
"sync"
"unsafe"
"golang.org/x/sys/windows"
)
type memoryMap []byte
// Windows
var handleLock sync.Mutex
var handleMap = map[uintptr]windows.Handle{}
func mmap(fd int, length int) (data []byte, err error) {
h, errno := windows.CreateFileMapping(windows.Handle(fd), nil,
uint32(windows.PAGE_READONLY), 0, uint32(length), nil)
if h == 0 {
return nil, os.NewSyscallError("CreateFileMapping", errno)
}
addr, errno := windows.MapViewOfFile(h, uint32(windows.FILE_MAP_READ), 0,
0, uintptr(length))
if addr == 0 {
return nil, os.NewSyscallError("MapViewOfFile", errno)
}
handleLock.Lock()
handleMap[addr] = h
handleLock.Unlock()
m := memoryMap{}
dh := m.header()
dh.Data = addr
dh.Len = length
dh.Cap = dh.Len
return m, nil
}
func (m *memoryMap) header() *reflect.SliceHeader {
return (*reflect.SliceHeader)(unsafe.Pointer(m))
}
func flush(addr, len uintptr) error {
errno := windows.FlushViewOfFile(addr, len)
return os.NewSyscallError("FlushViewOfFile", errno)
}
func munmap(b []byte) (err error) {
m := memoryMap(b)
dh := m.header()
addr := dh.Data
length := uintptr(dh.Len)
flush(addr, length)
err = windows.UnmapViewOfFile(addr)
if err != nil {
return err
}
handleLock.Lock()
defer handleLock.Unlock()
handle, ok := handleMap[addr]
if !ok {
// should be impossible; we would've errored above
return errors.New("unknown base address")
}
delete(handleMap, addr)
e := windows.CloseHandle(windows.Handle(handle))
return os.NewSyscallError("CloseHandle", e)
}

259
vendor/github.com/oschwald/maxminddb-golang/reader.go generated vendored Normal file
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@ -0,0 +1,259 @@
package maxminddb
import (
"bytes"
"errors"
"fmt"
"net"
"reflect"
)
const (
// NotFound is returned by LookupOffset when a matched root record offset
// cannot be found.
NotFound = ^uintptr(0)
dataSectionSeparatorSize = 16
)
var metadataStartMarker = []byte("\xAB\xCD\xEFMaxMind.com")
// Reader holds the data corresponding to the MaxMind DB file. Its only public
// field is Metadata, which contains the metadata from the MaxMind DB file.
type Reader struct {
hasMappedFile bool
buffer []byte
decoder decoder
Metadata Metadata
ipv4Start uint
}
// Metadata holds the metadata decoded from the MaxMind DB file. In particular
// in has the format version, the build time as Unix epoch time, the database
// type and description, the IP version supported, and a slice of the natural
// languages included.
type Metadata struct {
BinaryFormatMajorVersion uint `maxminddb:"binary_format_major_version"`
BinaryFormatMinorVersion uint `maxminddb:"binary_format_minor_version"`
BuildEpoch uint `maxminddb:"build_epoch"`
DatabaseType string `maxminddb:"database_type"`
Description map[string]string `maxminddb:"description"`
IPVersion uint `maxminddb:"ip_version"`
Languages []string `maxminddb:"languages"`
NodeCount uint `maxminddb:"node_count"`
RecordSize uint `maxminddb:"record_size"`
}
// FromBytes takes a byte slice corresponding to a MaxMind DB file and returns
// a Reader structure or an error.
func FromBytes(buffer []byte) (*Reader, error) {
metadataStart := bytes.LastIndex(buffer, metadataStartMarker)
if metadataStart == -1 {
return nil, newInvalidDatabaseError("error opening database: invalid MaxMind DB file")
}
metadataStart += len(metadataStartMarker)
metadataDecoder := decoder{buffer[metadataStart:]}
var metadata Metadata
rvMetdata := reflect.ValueOf(&metadata)
_, err := metadataDecoder.decode(0, rvMetdata, 0)
if err != nil {
return nil, err
}
searchTreeSize := metadata.NodeCount * metadata.RecordSize / 4
dataSectionStart := searchTreeSize + dataSectionSeparatorSize
dataSectionEnd := uint(metadataStart - len(metadataStartMarker))
if dataSectionStart > dataSectionEnd {
return nil, newInvalidDatabaseError("the MaxMind DB contains invalid metadata")
}
d := decoder{
buffer[searchTreeSize+dataSectionSeparatorSize : metadataStart-len(metadataStartMarker)],
}
reader := &Reader{
buffer: buffer,
decoder: d,
Metadata: metadata,
ipv4Start: 0,
}
reader.ipv4Start, err = reader.startNode()
return reader, err
}
func (r *Reader) startNode() (uint, error) {
if r.Metadata.IPVersion != 6 {
return 0, nil
}
nodeCount := r.Metadata.NodeCount
node := uint(0)
var err error
for i := 0; i < 96 && node < nodeCount; i++ {
node, err = r.readNode(node, 0)
if err != nil {
return 0, err
}
}
return node, err
}
// Lookup takes an IP address as a net.IP structure and a pointer to the
// result value to Decode into.
func (r *Reader) Lookup(ipAddress net.IP, result interface{}) error {
if r.buffer == nil {
return errors.New("cannot call Lookup on a closed database")
}
pointer, err := r.lookupPointer(ipAddress)
if pointer == 0 || err != nil {
return err
}
return r.retrieveData(pointer, result)
}
// LookupOffset maps an argument net.IP to a corresponding record offset in the
// database. NotFound is returned if no such record is found, and a record may
// otherwise be extracted by passing the returned offset to Decode. LookupOffset
// is an advanced API, which exists to provide clients with a means to cache
// previously-decoded records.
func (r *Reader) LookupOffset(ipAddress net.IP) (uintptr, error) {
if r.buffer == nil {
return 0, errors.New("cannot call LookupOffset on a closed database")
}
pointer, err := r.lookupPointer(ipAddress)
if pointer == 0 || err != nil {
return NotFound, err
}
return r.resolveDataPointer(pointer)
}
// Decode the record at |offset| into |result|. The result value pointed to
// must be a data value that corresponds to a record in the database. This may
// include a struct representation of the data, a map capable of holding the
// data or an empty interface{} value.
//
// If result is a pointer to a struct, the struct need not include a field
// for every value that may be in the database. If a field is not present in
// the structure, the decoder will not decode that field, reducing the time
// required to decode the record.
//
// As a special case, a struct field of type uintptr will be used to capture
// the offset of the value. Decode may later be used to extract the stored
// value from the offset. MaxMind DBs are highly normalized: for example in
// the City database, all records of the same country will reference a
// single representative record for that country. This uintptr behavior allows
// clients to leverage this normalization in their own sub-record caching.
func (r *Reader) Decode(offset uintptr, result interface{}) error {
if r.buffer == nil {
return errors.New("cannot call Decode on a closed database")
}
return r.decode(offset, result)
}
func (r *Reader) decode(offset uintptr, result interface{}) error {
rv := reflect.ValueOf(result)
if rv.Kind() != reflect.Ptr || rv.IsNil() {
return errors.New("result param must be a pointer")
}
_, err := r.decoder.decode(uint(offset), reflect.ValueOf(result), 0)
return err
}
func (r *Reader) lookupPointer(ipAddress net.IP) (uint, error) {
if ipAddress == nil {
return 0, errors.New("ipAddress passed to Lookup cannot be nil")
}
ipV4Address := ipAddress.To4()
if ipV4Address != nil {
ipAddress = ipV4Address
}
if len(ipAddress) == 16 && r.Metadata.IPVersion == 4 {
return 0, fmt.Errorf("error looking up '%s': you attempted to look up an IPv6 address in an IPv4-only database", ipAddress.String())
}
return r.findAddressInTree(ipAddress)
}
func (r *Reader) findAddressInTree(ipAddress net.IP) (uint, error) {
bitCount := uint(len(ipAddress) * 8)
var node uint
if bitCount == 32 {
node = r.ipv4Start
}
nodeCount := r.Metadata.NodeCount
for i := uint(0); i < bitCount && node < nodeCount; i++ {
bit := uint(1) & (uint(ipAddress[i>>3]) >> (7 - (i % 8)))
var err error
node, err = r.readNode(node, bit)
if err != nil {
return 0, err
}
}
if node == nodeCount {
// Record is empty
return 0, nil
} else if node > nodeCount {
return node, nil
}
return 0, newInvalidDatabaseError("invalid node in search tree")
}
func (r *Reader) readNode(nodeNumber uint, index uint) (uint, error) {
RecordSize := r.Metadata.RecordSize
baseOffset := nodeNumber * RecordSize / 4
var nodeBytes []byte
var prefix uint
switch RecordSize {
case 24:
offset := baseOffset + index*3
nodeBytes = r.buffer[offset : offset+3]
case 28:
prefix = uint(r.buffer[baseOffset+3])
if index != 0 {
prefix &= 0x0F
} else {
prefix = (0xF0 & prefix) >> 4
}
offset := baseOffset + index*4
nodeBytes = r.buffer[offset : offset+3]
case 32:
offset := baseOffset + index*4
nodeBytes = r.buffer[offset : offset+4]
default:
return 0, newInvalidDatabaseError("unknown record size: %d", RecordSize)
}
return uintFromBytes(prefix, nodeBytes), nil
}
func (r *Reader) retrieveData(pointer uint, result interface{}) error {
offset, err := r.resolveDataPointer(pointer)
if err != nil {
return err
}
return r.decode(offset, result)
}
func (r *Reader) resolveDataPointer(pointer uint) (uintptr, error) {
var resolved = uintptr(pointer - r.Metadata.NodeCount - dataSectionSeparatorSize)
if resolved > uintptr(len(r.buffer)) {
return 0, newInvalidDatabaseError("the MaxMind DB file's search tree is corrupt")
}
return resolved, nil
}

28
vendor/github.com/oschwald/maxminddb-golang/reader_appengine.go generated vendored Normal file
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@ -0,0 +1,28 @@
// +build appengine
package maxminddb
import "io/ioutil"
// Open takes a string path to a MaxMind DB file and returns a Reader
// structure or an error. The database file is opened using a memory map,
// except on Google App Engine where mmap is not supported; there the database
// is loaded into memory. Use the Close method on the Reader object to return
// the resources to the system.
func Open(file string) (*Reader, error) {
bytes, err := ioutil.ReadFile(file)
if err != nil {
return nil, err
}
return FromBytes(bytes)
}
// Close unmaps the database file from virtual memory and returns the
// resources to the system. If called on a Reader opened using FromBytes
// or Open on Google App Engine, this method sets the underlying buffer
// to nil, returning the resources to the system.
func (r *Reader) Close() error {
r.buffer = nil
return nil
}

63
vendor/github.com/oschwald/maxminddb-golang/reader_other.go generated vendored Normal file
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@ -0,0 +1,63 @@
// +build !appengine
package maxminddb
import (
"os"
"runtime"
)
// Open takes a string path to a MaxMind DB file and returns a Reader
// structure or an error. The database file is opened using a memory map,
// except on Google App Engine where mmap is not supported; there the database
// is loaded into memory. Use the Close method on the Reader object to return
// the resources to the system.
func Open(file string) (*Reader, error) {
mapFile, err := os.Open(file)
if err != nil {
return nil, err
}
defer func() {
if rerr := mapFile.Close(); rerr != nil {
err = rerr
}
}()
stats, err := mapFile.Stat()
if err != nil {
return nil, err
}
fileSize := int(stats.Size())
mmap, err := mmap(int(mapFile.Fd()), fileSize)
if err != nil {
return nil, err
}
reader, err := FromBytes(mmap)
if err != nil {
if err2 := munmap(mmap); err2 != nil {
// failing to unmap the file is probably the more severe error
return nil, err2
}
return nil, err
}
reader.hasMappedFile = true
runtime.SetFinalizer(reader, (*Reader).Close)
return reader, err
}
// Close unmaps the database file from virtual memory and returns the
// resources to the system. If called on a Reader opened using FromBytes
// or Open on Google App Engine, this method does nothing.
func (r *Reader) Close() error {
var err error
if r.hasMappedFile {
runtime.SetFinalizer(r, nil)
r.hasMappedFile = false
err = munmap(r.buffer)
}
r.buffer = nil
return err
}

108
vendor/github.com/oschwald/maxminddb-golang/traverse.go generated vendored Normal file
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package maxminddb
import "net"
// Internal structure used to keep track of nodes we still need to visit.
type netNode struct {
ip net.IP
bit uint
pointer uint
}
// Networks represents a set of subnets that we are iterating over.
type Networks struct {
reader *Reader
nodes []netNode // Nodes we still have to visit.
lastNode netNode
err error
}
// Networks returns an iterator that can be used to traverse all networks in
// the database.
//
// Please note that a MaxMind DB may map IPv4 networks into several locations
// in in an IPv6 database. This iterator will iterate over all of these
// locations separately.
func (r *Reader) Networks() *Networks {
s := 4
if r.Metadata.IPVersion == 6 {
s = 16
}
return &Networks{
reader: r,
nodes: []netNode{
{
ip: make(net.IP, s),
},
},
}
}
// Next prepares the next network for reading with the Network method. It
// returns true if there is another network to be processed and false if there
// are no more networks or if there is an error.
func (n *Networks) Next() bool {
for len(n.nodes) > 0 {
node := n.nodes[len(n.nodes)-1]
n.nodes = n.nodes[:len(n.nodes)-1]
for {
if node.pointer < n.reader.Metadata.NodeCount {
ipRight := make(net.IP, len(node.ip))
copy(ipRight, node.ip)
if len(ipRight) <= int(node.bit>>3) {
n.err = newInvalidDatabaseError(
"invalid search tree at %v/%v", ipRight, node.bit)
return false
}
ipRight[node.bit>>3] |= 1 << (7 - (node.bit % 8))
rightPointer, err := n.reader.readNode(node.pointer, 1)
if err != nil {
n.err = err
return false
}
node.bit++
n.nodes = append(n.nodes, netNode{
pointer: rightPointer,
ip: ipRight,
bit: node.bit,
})
node.pointer, err = n.reader.readNode(node.pointer, 0)
if err != nil {
n.err = err
return false
}
} else if node.pointer > n.reader.Metadata.NodeCount {
n.lastNode = node
return true
} else {
break
}
}
}
return false
}
// Network returns the current network or an error if there is a problem
// decoding the data for the network. It takes a pointer to a result value to
// decode the network's data into.
func (n *Networks) Network(result interface{}) (*net.IPNet, error) {
if err := n.reader.retrieveData(n.lastNode.pointer, result); err != nil {
return nil, err
}
return &net.IPNet{
IP: n.lastNode.ip,
Mask: net.CIDRMask(int(n.lastNode.bit), len(n.lastNode.ip)*8),
}, nil
}
// Err returns an error, if any, that was encountered during iteration.
func (n *Networks) Err() error {
return n.err
}

185
vendor/github.com/oschwald/maxminddb-golang/verifier.go generated vendored Normal file
View File

@ -0,0 +1,185 @@
package maxminddb
import "reflect"
type verifier struct {
reader *Reader
}
// Verify checks that the database is valid. It validates the search tree,
// the data section, and the metadata section. This verifier is stricter than
// the specification and may return errors on databases that are readable.
func (r *Reader) Verify() error {
v := verifier{r}
if err := v.verifyMetadata(); err != nil {
return err
}
return v.verifyDatabase()
}
func (v *verifier) verifyMetadata() error {
metadata := v.reader.Metadata
if metadata.BinaryFormatMajorVersion != 2 {
return testError(
"binary_format_major_version",
2,
metadata.BinaryFormatMajorVersion,
)
}
if metadata.BinaryFormatMinorVersion != 0 {
return testError(
"binary_format_minor_version",
0,
metadata.BinaryFormatMinorVersion,
)
}
if metadata.DatabaseType == "" {
return testError(
"database_type",
"non-empty string",
metadata.DatabaseType,
)
}
if len(metadata.Description) == 0 {
return testError(
"description",
"non-empty slice",
metadata.Description,
)
}
if metadata.IPVersion != 4 && metadata.IPVersion != 6 {
return testError(
"ip_version",
"4 or 6",
metadata.IPVersion,
)
}
if metadata.RecordSize != 24 &&
metadata.RecordSize != 28 &&
metadata.RecordSize != 32 {
return testError(
"record_size",
"24, 28, or 32",
metadata.RecordSize,
)
}
if metadata.NodeCount == 0 {
return testError(
"node_count",
"positive integer",
metadata.NodeCount,
)
}
return nil
}
func (v *verifier) verifyDatabase() error {
offsets, err := v.verifySearchTree()
if err != nil {
return err
}
if err := v.verifyDataSectionSeparator(); err != nil {
return err
}
return v.verifyDataSection(offsets)
}
func (v *verifier) verifySearchTree() (map[uint]bool, error) {
offsets := make(map[uint]bool)
it := v.reader.Networks()
for it.Next() {
offset, err := v.reader.resolveDataPointer(it.lastNode.pointer)
if err != nil {
return nil, err
}
offsets[uint(offset)] = true
}
if err := it.Err(); err != nil {
return nil, err
}
return offsets, nil
}
func (v *verifier) verifyDataSectionSeparator() error {
separatorStart := v.reader.Metadata.NodeCount * v.reader.Metadata.RecordSize / 4
separator := v.reader.buffer[separatorStart : separatorStart+dataSectionSeparatorSize]
for _, b := range separator {
if b != 0 {
return newInvalidDatabaseError("unexpected byte in data separator: %v", separator)
}
}
return nil
}
func (v *verifier) verifyDataSection(offsets map[uint]bool) error {
pointerCount := len(offsets)
decoder := v.reader.decoder
var offset uint
bufferLen := uint(len(decoder.buffer))
for offset < bufferLen {
var data interface{}
rv := reflect.ValueOf(&data)
newOffset, err := decoder.decode(offset, rv, 0)
if err != nil {
return newInvalidDatabaseError("received decoding error (%v) at offset of %v", err, offset)
}
if newOffset <= offset {
return newInvalidDatabaseError("data section offset unexpectedly went from %v to %v", offset, newOffset)
}
pointer := offset
if _, ok := offsets[pointer]; ok {
delete(offsets, pointer)
} else {
return newInvalidDatabaseError("found data (%v) at %v that the search tree does not point to", data, pointer)
}
offset = newOffset
}
if offset != bufferLen {
return newInvalidDatabaseError(
"unexpected data at the end of the data section (last offset: %v, end: %v)",
offset,
bufferLen,
)
}
if len(offsets) != 0 {
return newInvalidDatabaseError(
"found %v pointers (of %v) in the search tree that we did not see in the data section",
len(offsets),
pointerCount,
)
}
return nil
}
func testError(
field string,
expected interface{},
actual interface{},
) error {
return newInvalidDatabaseError(
"%v - Expected: %v Actual: %v",
field,
expected,
actual,
)
}

23
vendor/vendor.json vendored
View File

@ -20,6 +20,11 @@
"revision": "371fbbdaa8987b715bdd21d6adc4c9b20155f748",
"revisionTime": "2016-08-11T21:22:31Z"
},
{
"path": "git",
"revision": "github.com:apilayer/freegeoip.git",
"version": "github.com:apilayer/freegeoip.git"
},
{
"checksumSHA1": "z+M6FYl9EKsoZZMLcT0Ktwfk8pI=",
"path": "github.com/Azure/azure-pipeline-go/pipeline",
@ -50,6 +55,12 @@
"revision": "e24eb225f15679bbe54f91bfa7da3b00e59b9768",
"revisionTime": "2019-02-18T06:46:05Z"
},
{
"checksumSHA1": "hp2pna9yEn9hemIjc7asalxL2Qs=",
"path": "github.com/apilayer/freegeoip",
"revision": "3f942d1392f6439bda0f67b3c650ce468ebdba8e",
"revisionTime": "2018-07-02T11:14:01Z"
},
{
"checksumSHA1": "USkefO0g1U9mr+8hagv3fpSkrxg=",
"path": "github.com/aristanetworks/goarista/monotime",
@ -188,6 +199,12 @@
"revision": "0a025b7e63adc15a622f29b0b2c4c3848243bbf6",
"revisionTime": "2016-08-13T22:13:03Z"
},
{
"checksumSHA1": "ZxzYc1JwJ3U6kZbw/KGuPko5lSY=",
"path": "github.com/howeyc/fsnotify",
"revision": "f0c08ee9c60704c1879025f2ae0ff3e000082c13",
"revisionTime": "2015-10-03T19:46:02Z"
},
{
"checksumSHA1": "f55gR+6YClh0i/FOhdy66SOUiwY=",
"path": "github.com/huin/goupnp",
@ -352,6 +369,12 @@
"revision": "bd9c3193394760d98b2fa6ebb2291f0cd1d06a7d",
"revisionTime": "2018-06-06T20:41:48Z"
},
{
"checksumSHA1": "a1WxG0wMDGFnjojQghwu1i1SDhk=",
"path": "github.com/oschwald/maxminddb-golang",
"revision": "277d39ecb83edd90f26a1fb450ab7e710faa203f",
"revisionTime": "2018-08-19T23:01:43Z"
},
{
"checksumSHA1": "Se195FlZ160eaEk/uVx4KdTPSxU=",
"path": "github.com/pborman/uuid",