rpc: migrated the RPC insterface to a new reflection based RPC layer

1 files changed, 0 insertions, 345 deletions

diff --git a/rpc/comms/http.go b/rpc/comms/http.go
deleted file mode 100644
index f4a930d0e..000000000
--- a/rpc/comms/http.go
+++ /dev/null
@@ -1,345 +0,0 @@
-// Copyright 2015 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library 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 Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package comms
-
-import (
-	"encoding/json"
-	"fmt"
-	"net"
-	"net/http"
-	"strings"
-	"sync"
-	"time"
-
-	"bytes"
-	"io"
-	"io/ioutil"
-
-	"github.com/ethereum/go-ethereum/logger"
-	"github.com/ethereum/go-ethereum/logger/glog"
-	"github.com/ethereum/go-ethereum/rpc/codec"
-	"github.com/ethereum/go-ethereum/rpc/shared"
-	"github.com/rs/cors"
-)
-
-const (
-	serverIdleTimeout  = 10 * time.Second // idle keep-alive connections
-	serverReadTimeout  = 15 * time.Second // per-request read timeout
-	serverWriteTimeout = 15 * time.Second // per-request read timeout
-)
-
-var (
-	httpServerMu sync.Mutex
-	httpServer   *stopServer
-)
-
-type HttpConfig struct {
-	ListenAddress string
-	ListenPort    uint
-	CorsDomain    string
-}
-
-// stopServer augments http.Server with idle connection tracking.
-// Idle keep-alive connections are shut down when Close is called.
-type stopServer struct {
-	*http.Server
-	l net.Listener
-	// connection tracking state
-	mu       sync.Mutex
-	shutdown bool // true when Stop has returned
-	idle     map[net.Conn]struct{}
-}
-
-type handler struct {
-	codec codec.Codec
-	api   shared.EthereumApi
-}
-
-// StartHTTP starts listening for RPC requests sent via HTTP.
-func StartHttp(cfg HttpConfig, codec codec.Codec, api shared.EthereumApi) error {
-	httpServerMu.Lock()
-	defer httpServerMu.Unlock()
-
-	addr := fmt.Sprintf("%s:%d", cfg.ListenAddress, cfg.ListenPort)
-	if httpServer != nil {
-		if addr != httpServer.Addr {
-			return fmt.Errorf("RPC service already running on %s ", httpServer.Addr)
-		}
-		return nil // RPC service already running on given host/port
-	}
-	// Set up the request handler, wrapping it with CORS headers if configured.
-	handler := http.Handler(&handler{codec, api})
-	if len(cfg.CorsDomain) > 0 {
-		opts := cors.Options{
-			AllowedMethods: []string{"POST"},
-			AllowedOrigins: strings.Split(cfg.CorsDomain, " "),
-		}
-		handler = cors.New(opts).Handler(handler)
-	}
-	// Start the server.
-	s, err := listenHTTP(addr, handler)
-	if err != nil {
-		glog.V(logger.Error).Infof("Can't listen on %s:%d: %v", cfg.ListenAddress, cfg.ListenPort, err)
-		return err
-	}
-	httpServer = s
-	return nil
-}
-
-func (h *handler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
-	w.Header().Set("Content-Type", "application/json")
-
-	// Limit request size to resist DoS
-	if req.ContentLength > maxHttpSizeReqLength {
-		err := fmt.Errorf("Request too large")
-		response := shared.NewRpcErrorResponse(-1, shared.JsonRpcVersion, -32700, err)
-		sendJSON(w, &response)
-		return
-	}
-
-	defer req.Body.Close()
-	payload, err := ioutil.ReadAll(req.Body)
-	if err != nil {
-		err := fmt.Errorf("Could not read request body")
-		response := shared.NewRpcErrorResponse(-1, shared.JsonRpcVersion, -32700, err)
-		sendJSON(w, &response)
-		return
-	}
-
-	c := h.codec.New(nil)
-	var rpcReq shared.Request
-	if err = c.Decode(payload, &rpcReq); err == nil {
-		reply, err := h.api.Execute(&rpcReq)
-		res := shared.NewRpcResponse(rpcReq.Id, rpcReq.Jsonrpc, reply, err)
-		sendJSON(w, &res)
-		return
-	}
-
-	var reqBatch []shared.Request
-	if err = c.Decode(payload, &reqBatch); err == nil {
-		resBatch := make([]*interface{}, len(reqBatch))
-		resCount := 0
-		for i, rpcReq := range reqBatch {
-			reply, err := h.api.Execute(&rpcReq)
-			if rpcReq.Id != nil { // this leaves nil entries in the response batch for later removal
-				resBatch[i] = shared.NewRpcResponse(rpcReq.Id, rpcReq.Jsonrpc, reply, err)
-				resCount += 1
-			}
-		}
-		// make response omitting nil entries
-		sendJSON(w, resBatch[:resCount])
-		return
-	}
-
-	// invalid request
-	err = fmt.Errorf("Could not decode request")
-	res := shared.NewRpcErrorResponse(-1, shared.JsonRpcVersion, -32600, err)
-	sendJSON(w, res)
-}
-
-func sendJSON(w io.Writer, v interface{}) {
-	if glog.V(logger.Detail) {
-		if payload, err := json.MarshalIndent(v, "", "\t"); err == nil {
-			glog.Infof("Sending payload: %s", payload)
-		}
-	}
-	if err := json.NewEncoder(w).Encode(v); err != nil {
-		glog.V(logger.Error).Infoln("Error sending JSON:", err)
-	}
-}
-
-// Stop closes all active HTTP connections and shuts down the server.
-func StopHttp() {
-	httpServerMu.Lock()
-	defer httpServerMu.Unlock()
-	if httpServer != nil {
-		httpServer.Close()
-		httpServer = nil
-	}
-}
-
-func listenHTTP(addr string, h http.Handler) (*stopServer, error) {
-	l, err := net.Listen("tcp", addr)
-	if err != nil {
-		return nil, err
-	}
-	s := &stopServer{l: l, idle: make(map[net.Conn]struct{})}
-	s.Server = &http.Server{
-		Addr:         addr,
-		Handler:      h,
-		ReadTimeout:  serverReadTimeout,
-		WriteTimeout: serverWriteTimeout,
-		ConnState:    s.connState,
-	}
-	go s.Serve(l)
-	return s, nil
-}
-
-func (s *stopServer) connState(c net.Conn, state http.ConnState) {
-	s.mu.Lock()
-	defer s.mu.Unlock()
-	// Close c immediately if we're past shutdown.
-	if s.shutdown {
-		if state != http.StateClosed {
-			c.Close()
-		}
-		return
-	}
-	if state == http.StateIdle {
-		s.idle[c] = struct{}{}
-	} else {
-		delete(s.idle, c)
-	}
-}
-
-func (s *stopServer) Close() {
-	s.mu.Lock()
-	defer s.mu.Unlock()
-	// Shut down the acceptor. No new connections can be created.
-	s.l.Close()
-	// Drop all idle connections. Non-idle connections will be
-	// closed by connState as soon as they become idle.
-	s.shutdown = true
-	for c := range s.idle {
-		glog.V(logger.Detail).Infof("closing idle connection %v", c.RemoteAddr())
-		c.Close()
-		delete(s.idle, c)
-	}
-}
-
-type httpClient struct {
-	address string
-	port    uint
-	codec   codec.ApiCoder
-	lastRes interface{}
-	lastErr error
-}
-
-// Create a new in process client
-func NewHttpClient(cfg HttpConfig, c codec.Codec) *httpClient {
-	return &httpClient{
-		address: cfg.ListenAddress,
-		port:    cfg.ListenPort,
-		codec:   c.New(nil),
-	}
-}
-
-func (self *httpClient) Close() {
-	// do nothing
-}
-
-func (self *httpClient) Send(req interface{}) error {
-	var body []byte
-	var err error
-
-	self.lastRes = nil
-	self.lastErr = nil
-
-	if body, err = self.codec.Encode(req); err != nil {
-		return err
-	}
-
-	httpReq, err := http.NewRequest("POST", fmt.Sprintf("%s:%d", self.address, self.port), bytes.NewBuffer(body))
-	if err != nil {
-		return err
-	}
-	httpReq.Header.Set("Content-Type", "application/json")
-
-	client := http.Client{}
-	resp, err := client.Do(httpReq)
-	if err != nil {
-		return err
-	}
-
-	defer resp.Body.Close()
-
-	if resp.Status == "200 OK" {
-		reply, _ := ioutil.ReadAll(resp.Body)
-		var rpcSuccessResponse shared.SuccessResponse
-		if err = self.codec.Decode(reply, &rpcSuccessResponse); err == nil {
-			self.lastRes = &rpcSuccessResponse
-			self.lastErr = err
-			return nil
-		} else {
-			var rpcErrorResponse shared.ErrorResponse
-			if err = self.codec.Decode(reply, &rpcErrorResponse); err == nil {
-				self.lastRes = &rpcErrorResponse
-				self.lastErr = err
-				return nil
-			} else {
-				return err
-			}
-		}
-	}
-
-	return fmt.Errorf("Not implemented")
-}
-
-func (self *httpClient) Recv() (interface{}, error) {
-	return self.lastRes, self.lastErr
-}
-
-func (self *httpClient) SupportedModules() (map[string]string, error) {
-	var body []byte
-	var err error
-
-	payload := shared.Request{
-		Id:      1,
-		Jsonrpc: "2.0",
-		Method:  "modules",
-	}
-
-	if body, err = self.codec.Encode(payload); err != nil {
-		return nil, err
-	}
-
-	req, err := http.NewRequest("POST", fmt.Sprintf("%s:%d", self.address, self.port), bytes.NewBuffer(body))
-	if err != nil {
-		return nil, err
-	}
-	req.Header.Set("Content-Type", "application/json")
-
-	client := http.Client{}
-	resp, err := client.Do(req)
-	if err != nil {
-		return nil, err
-	}
-
-	defer resp.Body.Close()
-
-	if resp.Status == "200 OK" {
-		reply, _ := ioutil.ReadAll(resp.Body)
-		var rpcRes shared.SuccessResponse
-		if err = self.codec.Decode(reply, &rpcRes); err != nil {
-			return nil, err
-		}
-
-		result := make(map[string]string)
-		if modules, ok := rpcRes.Result.(map[string]interface{}); ok {
-			for a, v := range modules {
-				result[a] = fmt.Sprintf("%s", v)
-			}
-			return result, nil
-		}
-		err = fmt.Errorf("Unable to parse module response - %v", rpcRes.Result)
-	} else {
-		fmt.Printf("resp.Status = %s\n", resp.Status)
-		fmt.Printf("err = %v\n", err)
-	}
-
-	return nil, err
-}