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/*
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 rpc
import (
"fmt"
"net"
"net/http"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/xeth"
)
var jsonlogger = logger.NewLogger("JSON")
type JsonRpcServer struct {
quit chan bool
listener net.Listener
pipe *xeth.JSXEth
}
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()
h := apiHandler(&EthereumApi{pipe: s.pipe})
http.Handle("/", h)
err := http.Serve(s.listener, nil)
// TODO Complains on shutdown due to listner already being closed
if err != nil {
jsonlogger.Errorln("Error on JSON-RPC interface:", err)
}
}
func NewJsonRpcServer(pipe *xeth.JSXEth, 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
}
func apiHandler(xeth *EthereumApi) http.Handler {
fn := func(w http.ResponseWriter, req *http.Request) {
jsonlogger.Debugln("Handling request")
reqParsed, reqerr := JSON.ParseRequestBody(req)
if reqerr != nil {
JSON.Send(w, &RpcErrorResponse{JsonRpc: reqParsed.JsonRpc, ID: reqParsed.ID, Error: true, ErrorText: ErrorParseRequest})
return
}
var response interface{}
reserr := JSON.GetRequestReply(xeth, &reqParsed, &response)
if reserr != nil {
jsonlogger.Errorln(reserr)
JSON.Send(w, &RpcErrorResponse{JsonRpc: reqParsed.JsonRpc, ID: reqParsed.ID, Error: true, ErrorText: reserr.Error()})
return
}
jsonlogger.Debugf("Generated response: %T %s", response, response)
JSON.Send(w, &RpcSuccessResponse{JsonRpc: reqParsed.JsonRpc, ID: reqParsed.ID, Error: false, Result: response})
}
return http.HandlerFunc(fn)
}
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