151 lines
3.8 KiB
Go
151 lines
3.8 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package comms
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import (
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"io"
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"net"
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"fmt"
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"strings"
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"strconv"
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"github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/logger/glog"
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"github.com/ethereum/go-ethereum/rpc/codec"
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"github.com/ethereum/go-ethereum/rpc/shared"
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)
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const (
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maxHttpSizeReqLength = 1024 * 1024 // 1MB
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)
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var (
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// List with all API's which are offered over the in proc interface by default
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DefaultInProcApis = shared.AllApis
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// List with all API's which are offered over the IPC interface by default
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DefaultIpcApis = shared.AllApis
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// List with API's which are offered over thr HTTP/RPC interface by default
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DefaultHttpRpcApis = strings.Join([]string{
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shared.DbApiName, shared.EthApiName, shared.NetApiName, shared.Web3ApiName,
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}, ",")
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)
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type EthereumClient interface {
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// Close underlying connection
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Close()
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// Send request
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Send(interface{}) error
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// Receive response
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Recv() (interface{}, error)
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// List with modules this client supports
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SupportedModules() (map[string]string, error)
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}
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func handle(id int, conn net.Conn, api shared.EthereumApi, c codec.Codec) {
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codec := c.New(conn)
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defer func() {
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if r := recover(); r != nil {
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glog.Errorf("panic: %v\n", r)
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}
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codec.Close()
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}()
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for {
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requests, isBatch, err := codec.ReadRequest()
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if err == io.EOF {
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return
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} else if err != nil {
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glog.V(logger.Debug).Infof("Closed IPC Conn %06d recv err - %v\n", id, err)
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return
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}
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if isBatch {
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responses := make([]*interface{}, len(requests))
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responseCount := 0
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for _, req := range requests {
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res, err := api.Execute(req)
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if req.Id != nil {
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rpcResponse := shared.NewRpcResponse(req.Id, req.Jsonrpc, res, err)
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responses[responseCount] = rpcResponse
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responseCount += 1
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}
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}
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err = codec.WriteResponse(responses[:responseCount])
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if err != nil {
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glog.V(logger.Debug).Infof("Closed IPC Conn %06d send err - %v\n", id, err)
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return
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}
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} else {
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var rpcResponse interface{}
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res, err := api.Execute(requests[0])
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rpcResponse = shared.NewRpcResponse(requests[0].Id, requests[0].Jsonrpc, res, err)
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err = codec.WriteResponse(rpcResponse)
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if err != nil {
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glog.V(logger.Debug).Infof("Closed IPC Conn %06d send err - %v\n", id, err)
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return
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}
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}
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}
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}
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// Endpoint must be in the form of:
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// ${protocol}:${path}
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// e.g. ipc:/tmp/geth.ipc
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// rpc:localhost:8545
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func ClientFromEndpoint(endpoint string, c codec.Codec) (EthereumClient, error) {
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if strings.HasPrefix(endpoint, "ipc:") {
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cfg := IpcConfig{
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Endpoint: endpoint[4:],
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}
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return NewIpcClient(cfg, codec.JSON)
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}
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if strings.HasPrefix(endpoint, "rpc:") {
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parts := strings.Split(endpoint, ":")
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addr := "http://localhost"
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port := uint(8545)
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if len(parts) >= 3 {
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addr = parts[1] + ":" + parts[2]
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}
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if len(parts) >= 4 {
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p, err := strconv.Atoi(parts[3])
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if err != nil {
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return nil, err
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}
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port = uint(p)
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}
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cfg := HttpConfig{
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ListenAddress: addr,
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ListenPort: port,
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}
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return NewHttpClient(cfg, codec.JSON), nil
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}
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return nil, fmt.Errorf("Invalid endpoint")
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}
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