Merge pull request #1710 from bas-vk/useragent

user agent messages were dumped in some cases
(cherry picked from commit a219159)

Author: fjl

rpc/comms/ipc.go

@@ -42,16 +42,12 @@ func (self *ipcClient) Close() {
 	self.coder.Close()
 }
 
-func (self *ipcClient) Send(req interface{}) error {
+func (self *ipcClient) Send(msg interface{}) error {
 	var err error
-	if r, ok := req.(*shared.Request); ok {
-		if err = self.coder.WriteResponse(r); err != nil {
-			if err = self.reconnect(); err == nil {
-				err = self.coder.WriteResponse(r)
-			}
+	if err = self.coder.WriteResponse(msg); err != nil {
+		if err = self.reconnect(); err == nil {
+			err = self.coder.WriteResponse(msg)
 		}
-
-		return err
 	}
 	return err
 }

rpc/comms/ipc_unix.go

@@ -26,6 +26,7 @@ import (
 	"github.com/ethereum/go-ethereum/logger/glog"
 	"github.com/ethereum/go-ethereum/rpc/codec"
 	"github.com/ethereum/go-ethereum/rpc/shared"
+	"github.com/ethereum/go-ethereum/rpc/useragent"
 )
 
 func newIpcClient(cfg IpcConfig, codec codec.Codec) (*ipcClient, error) {
@@ -34,14 +35,34 @@ func newIpcClient(cfg IpcConfig, codec codec.Codec) (*ipcClient, error) {
 		return nil, err
 	}
 
-	return &ipcClient{cfg.Endpoint, c, codec, codec.New(c)}, nil
+	coder := codec.New(c)
+	msg := shared.Request{
+		Id:      0,
+		Method:  useragent.EnableUserAgentMethod,
+		Jsonrpc: shared.JsonRpcVersion,
+		Params:  []byte("[]"),
+	}
+
+	coder.WriteResponse(msg)
+	coder.Recv()
+
+	return &ipcClient{cfg.Endpoint, c, codec, coder}, nil
 }
 
 func (self *ipcClient) reconnect() error {
 	self.coder.Close()
 	c, err := net.DialUnix("unix", nil, &net.UnixAddr{self.endpoint, "unix"})
 	if err == nil {
 		self.coder = self.codec.New(c)
+
+		msg := shared.Request{
+			Id:      0,
+			Method:  useragent.EnableUserAgentMethod,
+			Jsonrpc: shared.JsonRpcVersion,
+			Params:  []byte("[]"),
+		}
+		self.coder.WriteResponse(msg)
+		self.coder.Recv()
 	}
 
 	return err

rpc/comms/ipc_windows.go

@@ -32,6 +32,7 @@ import (
 	"github.com/ethereum/go-ethereum/logger/glog"
 	"github.com/ethereum/go-ethereum/rpc/codec"
 	"github.com/ethereum/go-ethereum/rpc/shared"
+	"github.com/ethereum/go-ethereum/rpc/useragent"
 )
 
 var (
@@ -656,13 +657,33 @@ func newIpcClient(cfg IpcConfig, codec codec.Codec) (*ipcClient, error) {
 		return nil, err
 	}
 
-	return &ipcClient{cfg.Endpoint, c, codec, codec.New(c)}, nil
+	coder := codec.New(c)
+	msg := shared.Request{
+		Id:      0,
+		Method:  useragent.EnableUserAgentMethod,
+		Jsonrpc: shared.JsonRpcVersion,
+		Params:  []byte("[]"),
+	}
+
+	coder.WriteResponse(msg)
+	coder.Recv()
+
+	return &ipcClient{cfg.Endpoint, c, codec, coder}, nil
 }
 
 func (self *ipcClient) reconnect() error {
 	c, err := Dial(self.endpoint)
 	if err == nil {
 		self.coder = self.codec.New(c)
+
+		req := shared.Request{
+			Id:      0,
+			Method:  useragent.EnableUserAgentMethod,
+			Jsonrpc: shared.JsonRpcVersion,
+			Params:  []byte("[]"),
+		}
+		self.coder.WriteResponse(req)
+		self.coder.Recv()
 	}
 	return err
 }

rpc/jeth.go

@@ -40,16 +40,6 @@ type Jeth struct {
 }
 
 func NewJeth(ethApi shared.EthereumApi, re *jsre.JSRE, client comms.EthereumClient, fe xeth.Frontend) *Jeth {
-	// enable the jeth as the user agent
-	req := shared.Request{
-		Id:      0,
-		Method:  useragent.EnableUserAgentMethod,
-		Jsonrpc: shared.JsonRpcVersion,
-		Params:  []byte("[]"),
-	}
-	client.Send(&req)
-	client.Recv()
-
 	return &Jeth{ethApi, re, client, fe}
 }