plugeth/rpc/endpoints.go
Felix Lange 91b228966e
rpc: remove startup error for invalid modules, log it instead (#20684)
This removes the error added in #20597 in favor of a log message at
error level. Failing to start broke a bunch of people's setups and is
probably not the right thing to do for this check.
2020-02-17 18:33:32 +02:00

126 lines
4.3 KiB
Go

// 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 rpc
import (
"net"
"github.com/ethereum/go-ethereum/log"
)
// checkModuleAvailability check that all names given in modules are actually
// available API services.
func checkModuleAvailability(modules []string, apis []API) (bad, available []string) {
availableSet := make(map[string]struct{})
for _, api := range apis {
if _, ok := availableSet[api.Namespace]; !ok {
availableSet[api.Namespace] = struct{}{}
available = append(available, api.Namespace)
}
}
for _, name := range modules {
if _, ok := availableSet[name]; !ok {
bad = append(bad, name)
}
}
return bad, available
}
// StartHTTPEndpoint starts the HTTP RPC endpoint, configured with cors/vhosts/modules.
func StartHTTPEndpoint(endpoint string, apis []API, modules []string, cors []string, vhosts []string, timeouts HTTPTimeouts) (net.Listener, *Server, error) {
if bad, available := checkModuleAvailability(modules, apis); len(bad) > 0 {
log.Error("Unavailable modules in HTTP API list", "unavailable", bad, "available", available)
}
// Generate the whitelist based on the allowed modules
whitelist := make(map[string]bool)
for _, module := range modules {
whitelist[module] = true
}
// Register all the APIs exposed by the services
handler := NewServer()
for _, api := range apis {
if whitelist[api.Namespace] || (len(whitelist) == 0 && api.Public) {
if err := handler.RegisterName(api.Namespace, api.Service); err != nil {
return nil, nil, err
}
log.Debug("HTTP registered", "namespace", api.Namespace)
}
}
// All APIs registered, start the HTTP listener
var (
listener net.Listener
err error
)
if listener, err = net.Listen("tcp", endpoint); err != nil {
return nil, nil, err
}
go NewHTTPServer(cors, vhosts, timeouts, handler).Serve(listener)
return listener, handler, err
}
// StartWSEndpoint starts a websocket endpoint.
func StartWSEndpoint(endpoint string, apis []API, modules []string, wsOrigins []string, exposeAll bool) (net.Listener, *Server, error) {
if bad, available := checkModuleAvailability(modules, apis); len(bad) > 0 {
log.Error("Unavailable modules in WS API list", "unavailable", bad, "available", available)
}
// Generate the whitelist based on the allowed modules
whitelist := make(map[string]bool)
for _, module := range modules {
whitelist[module] = true
}
// Register all the APIs exposed by the services
handler := NewServer()
for _, api := range apis {
if exposeAll || whitelist[api.Namespace] || (len(whitelist) == 0 && api.Public) {
if err := handler.RegisterName(api.Namespace, api.Service); err != nil {
return nil, nil, err
}
log.Debug("WebSocket registered", "service", api.Service, "namespace", api.Namespace)
}
}
// All APIs registered, start the HTTP listener
var (
listener net.Listener
err error
)
if listener, err = net.Listen("tcp", endpoint); err != nil {
return nil, nil, err
}
go NewWSServer(wsOrigins, handler).Serve(listener)
return listener, handler, err
}
// StartIPCEndpoint starts an IPC endpoint.
func StartIPCEndpoint(ipcEndpoint string, apis []API) (net.Listener, *Server, error) {
// Register all the APIs exposed by the services.
handler := NewServer()
for _, api := range apis {
if err := handler.RegisterName(api.Namespace, api.Service); err != nil {
return nil, nil, err
}
log.Debug("IPC registered", "namespace", api.Namespace)
}
// All APIs registered, start the IPC listener.
listener, err := ipcListen(ipcEndpoint)
if err != nil {
return nil, nil, err
}
go handler.ServeListener(listener)
return listener, handler, nil
}