diff --git a/rpc/websocket/server.go b/rpc/websocket/server.go new file mode 100644 index 0000000000..f854fe502e --- /dev/null +++ b/rpc/websocket/server.go @@ -0,0 +1,124 @@ +/* + 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 . +*/ +package websocket + +import ( + "fmt" + "net" + "net/http" + + ws "code.google.com/p/go.net/websocket" + "github.com/ethereum/go-ethereum/eth" + "github.com/ethereum/go-ethereum/event/filter" + "github.com/ethereum/go-ethereum/logger" + "github.com/ethereum/go-ethereum/rpc" + "github.com/ethereum/go-ethereum/xeth" +) + +var wslogger = logger.NewLogger("RPC-WS") + +type WebSocketServer struct { + eth *eth.Ethereum + filterManager *filter.FilterManager + port int + doneCh chan bool + listener net.Listener +} + +func NewWebSocketServer(eth *eth.Ethereum, port int) (*WebSocketServer, error) { + sport := fmt.Sprintf(":%d", port) + l, err := net.Listen("tcp", sport) + if err != nil { + return nil, err + } + + filterManager := filter.NewFilterManager(eth.EventMux()) + go filterManager.Start() + + return &WebSocketServer{eth, + filterManager, + 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(xeth.NewJSXEth(self.eth)) + 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(xeth *rpc.EthereumApi) http.Handler { + fn := func(w http.ResponseWriter, req *http.Request) { + h := sockHandler(xeth) + s := ws.Server{Handler: h} + s.ServeHTTP(w, req) + } + + return http.HandlerFunc(fn) +} + +func sockHandler(xeth *rpc.EthereumApi) ws.Handler { + fn := func(conn *ws.Conn) { + for { + // FIX wslogger does not output to console + wslogger.Debugln("Handling request") + var reqParsed rpc.RpcRequest + + if err := ws.JSON.Receive(conn, &reqParsed); err != nil { + wslogger.Debugln(rpc.ErrorParseRequest) + ws.JSON.Send(conn, rpc.RpcErrorResponse{JsonRpc: reqParsed.JsonRpc, ID: reqParsed.ID, Error: true, ErrorText: rpc.ErrorParseRequest}) + continue + } + + var response interface{} + reserr := xeth.GetRequestReply(&reqParsed, &response) + if reserr != nil { + wslogger.Errorln(reserr) + ws.JSON.Send(conn, rpc.RpcErrorResponse{JsonRpc: reqParsed.JsonRpc, ID: reqParsed.ID, Error: true, ErrorText: reserr.Error()}) + continue + } + + wslogger.Debugf("Generated response: %T %s", response, response) + ws.JSON.Send(conn, rpc.RpcSuccessResponse{JsonRpc: reqParsed.JsonRpc, ID: reqParsed.ID, Error: false, Result: response}) + } + } + return fn +}