122 lines
3.1 KiB
Go
122 lines
3.1 KiB
Go
/*
|
|
This file is part of go-ethereum
|
|
|
|
go-ethereum is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
go-ethereum 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
package rpcws
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"net/http"
|
|
|
|
"code.google.com/p/go.net/websocket"
|
|
"github.com/ethereum/go-ethereum/logger"
|
|
"github.com/ethereum/go-ethereum/rpc"
|
|
"github.com/ethereum/go-ethereum/xeth"
|
|
)
|
|
|
|
var wslogger = logger.NewLogger("RPC-WS")
|
|
var JSON rpc.JsonWrapper
|
|
|
|
type WebSocketServer struct {
|
|
pipe *xeth.XEth
|
|
port int
|
|
doneCh chan bool
|
|
listener net.Listener
|
|
}
|
|
|
|
func NewWebSocketServer(pipe *xeth.XEth, port int) (*WebSocketServer, error) {
|
|
sport := fmt.Sprintf(":%d", port)
|
|
l, err := net.Listen("tcp", sport)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &WebSocketServer{
|
|
pipe,
|
|
port,
|
|
make(chan bool),
|
|
l,
|
|
}, nil
|
|
}
|
|
|
|
func (self *WebSocketServer) handlerLoop() {
|
|
for {
|
|
select {
|
|
case <-self.doneCh:
|
|
wslogger.Infoln("Shutdown RPC-WS server")
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
func (self *WebSocketServer) Stop() {
|
|
close(self.doneCh)
|
|
}
|
|
|
|
func (self *WebSocketServer) Start() {
|
|
wslogger.Infof("Starting RPC-WS server on port %d", self.port)
|
|
go self.handlerLoop()
|
|
|
|
api := rpc.NewEthereumApi(self.pipe)
|
|
h := self.apiHandler(api)
|
|
http.Handle("/ws", h)
|
|
|
|
err := http.Serve(self.listener, nil)
|
|
if err != nil {
|
|
wslogger.Errorln("Error on RPC-WS interface:", err)
|
|
}
|
|
}
|
|
|
|
func (s *WebSocketServer) apiHandler(api *rpc.EthereumApi) http.Handler {
|
|
fn := func(w http.ResponseWriter, req *http.Request) {
|
|
h := sockHandler(api)
|
|
s := websocket.Server{Handler: h}
|
|
s.ServeHTTP(w, req)
|
|
}
|
|
|
|
return http.HandlerFunc(fn)
|
|
}
|
|
|
|
func sockHandler(api *rpc.EthereumApi) websocket.Handler {
|
|
var jsonrpcver string = "2.0"
|
|
fn := func(conn *websocket.Conn) {
|
|
for {
|
|
wslogger.Debugln("Handling connection")
|
|
var reqParsed rpc.RpcRequest
|
|
|
|
// reqParsed, reqerr := JSON.ParseRequestBody(conn.Request())
|
|
if err := websocket.JSON.Receive(conn, &reqParsed); err != nil {
|
|
jsonerr := &rpc.RpcErrorObject{-32700, rpc.ErrorParseRequest}
|
|
JSON.Send(conn, &rpc.RpcErrorResponse{JsonRpc: jsonrpcver, ID: nil, Error: jsonerr})
|
|
continue
|
|
}
|
|
|
|
var response interface{}
|
|
reserr := api.GetRequestReply(&reqParsed, &response)
|
|
if reserr != nil {
|
|
wslogger.Warnln(reserr)
|
|
jsonerr := &rpc.RpcErrorObject{-32603, reserr.Error()}
|
|
JSON.Send(conn, &rpc.RpcErrorResponse{JsonRpc: jsonrpcver, ID: reqParsed.ID, Error: jsonerr})
|
|
continue
|
|
}
|
|
|
|
wslogger.Debugf("Generated response: %T %s", response, response)
|
|
JSON.Send(conn, &rpc.RpcSuccessResponse{JsonRpc: jsonrpcver, ID: reqParsed.ID, Result: response})
|
|
}
|
|
}
|
|
return websocket.Handler(fn)
|
|
}
|