Abstract http into rpc package

New RpcConfig object to pass growing config

cmd/geth/admin.go

@@ -2,8 +2,6 @@ package main
 
 import (
 	"fmt"
-	"net"
-	"net/http"
 	"os"
 	"time"
 
@@ -70,12 +68,20 @@ func (js *jsre) startRPC(call otto.FunctionCall) otto.Value {
 		return otto.FalseValue()
 	}
 
-	l, err := net.Listen("tcp", fmt.Sprintf("%s:%d", addr, port))
+	config := rpc.RpcConfig{
+		ListenAddress: addr,
+		ListenPort:    uint(port),
+		// CorsDomain:    ctx.GlobalString(RPCCORSDomainFlag.Name),
+	}
+
+	xeth := xeth.New(js.ethereum, nil)
+	err = rpc.Start(xeth, config)
+
 	if err != nil {
-		fmt.Printf("Can't listen on %s:%d: %v", addr, port, err)
+		fmt.Printf(err.Error())
 		return otto.FalseValue()
 	}
-	go http.Serve(l, rpc.JSONRPC(xeth.New(js.ethereum, nil)))
+
 	return otto.TrueValue()
 }
 

cmd/utils/flags.go

@@ -2,9 +2,6 @@ package utils
 
 import (
 	"crypto/ecdsa"
-	"fmt"
-	"net"
-	"net/http"
 	"os"
 	"path"
 	"runtime"
@@ -259,12 +256,12 @@ func GetAccountManager(ctx *cli.Context) *accounts.Manager {
 }
 
 func StartRPC(eth *eth.Ethereum, ctx *cli.Context) {
-	addr := ctx.GlobalString(RPCListenAddrFlag.Name)
-	port := ctx.GlobalInt(RPCPortFlag.Name)
-	fmt.Println("Starting RPC on port: ", port)
-	l, err := net.Listen("tcp", fmt.Sprintf("%s:%d", addr, port))
-	if err != nil {
-		Fatalf("Can't listen on %s:%d: %v", addr, port, err)
+	config := rpc.RpcConfig{
+		ListenAddress: ctx.GlobalString(RPCListenAddrFlag.Name),
+		ListenPort:    uint(ctx.GlobalInt(RPCPortFlag.Name)),
+		CorsDomain:    ctx.GlobalString(RPCCORSDomainFlag.Name),
 	}
-	go http.Serve(l, rpc.JSONRPC(xeth.New(eth, nil)))
+
+	xeth := xeth.New(eth, nil)
+	_ = rpc.Start(xeth, config)
 }

rpc/http.go

@@ -2,8 +2,10 @@ package rpc
 
 import (
 	"encoding/json"
+	"fmt"
 	"io"
 	"io/ioutil"
+	"net"
 	"net/http"
 
 	"github.com/ethereum/go-ethereum/logger"
@@ -17,6 +19,16 @@ const (
 	maxSizeReqLength = 1024 * 1024 // 1MB
 )
 
+func Start(pipe *xeth.XEth, config RpcConfig) error {
+	l, err := net.Listen("tcp", fmt.Sprintf("%s:%d", config.ListenAddress, config.ListenPort))
+	if err != nil {
+		rpclogger.Errorf("Can't listen on %s:%d: %v", config.ListenAddress, config.ListenPort, err)
+		return err
+	}
+	go http.Serve(l, JSONRPC(pipe))
+	return nil
+}
+
 // JSONRPC returns a handler that implements the Ethereum JSON-RPC API.
 func JSONRPC(pipe *xeth.XEth) http.Handler {
 	api := NewEthereumApi(pipe)

rpc/messages.go

@@ -21,6 +21,12 @@ import (
 	"fmt"
 )
 
+type RpcConfig struct {
+	ListenAddress string
+	ListenPort    uint
+	CorsDomain    string
+}
+
 type InvalidTypeError struct {
 	method string
 	msg    string