rpc/server.go


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package rpc

import (
    "fmt"
    "net"
    "net/rpc"
    "net/rpc/jsonrpc"

    "github.com/ethereum/go-ethereum/ethpipe"
    "github.com/ethereum/go-ethereum/logger"
)

var jsonlogger = logger.NewLogger("JSON")

type JsonRpcServer struct {
    quit     chan bool
    listener net.Listener
    pipe     *ethpipe.JSPipe
}

func (s *JsonRpcServer) exitHandler() {
out:
    for {
        select {
        case <-s.quit:
            s.listener.Close()
            break out
        }
    }

    jsonlogger.Infoln("Shutdown JSON-RPC server")
}

func (s *JsonRpcServer) Stop() {
    close(s.quit)
}

func (s *JsonRpcServer) Start() {
    jsonlogger.Infoln("Starting JSON-RPC server")
    go s.exitHandler()
    rpc.Register(&EthereumApi{pipe: s.pipe})
    rpc.HandleHTTP()

    for {
        conn, err := s.listener.Accept()
        if err != nil {
            jsonlogger.Infoln("Error starting JSON-RPC:", err)
            break
        }
        jsonlogger.Debugln("Incoming request.")
        go jsonrpc.ServeConn(conn)
    }
}

func NewJsonRpcServer(pipe *ethpipe.JSPipe, port int) (*JsonRpcServer, error) {
    sport := fmt.Sprintf(":%d", port)
    l, err := net.Listen("tcp", sport)
    if err != nil {
        return nil, err
    }

    return &JsonRpcServer{
        listener: l,
        quit:     make(chan bool),
        pipe:     pipe,
    }, nil
}