Merge pull request #1332 from bas-vk/ipcbatch

IPC interface improvements

rpc/codec/codec.go

@@ -12,7 +12,7 @@ type Codec int
 // (de)serialization support for rpc interface
 type ApiCoder interface {
 	// Parse message to request from underlying stream
-	ReadRequest() (*shared.Request, error)
+	ReadRequest() ([]*shared.Request, bool, error)
 	// Parse response message from underlying stream
 	ReadResponse() (interface{}, error)
 	// Encode response to encoded form in underlying stream

rpc/codec/json.go

@@ -2,71 +2,130 @@ package codec
 
 import (
 	"encoding/json"
+	"fmt"
 	"net"
+	"time"
 
 	"github.com/ethereum/go-ethereum/rpc/shared"
 )
 
 const (
-	MAX_RESPONSE_SIZE = 64 * 1024
+	READ_TIMEOUT      = 15 // read timeout in seconds
+	MAX_REQUEST_SIZE  = 1024 * 1024
+	MAX_RESPONSE_SIZE = 1024 * 1024
 )
 
 // Json serialization support
 type JsonCodec struct {
 	c net.Conn
-	d *json.Decoder
-	e *json.Encoder
 }
 
 // Create new JSON coder instance
 func NewJsonCoder(conn net.Conn) ApiCoder {
 	return &JsonCodec{
 		c: conn,
-		d: json.NewDecoder(conn),
-		e: json.NewEncoder(conn),
 	}
 }
 
 // Serialize obj to JSON and write it to conn
-func (self *JsonCodec) ReadRequest() (*shared.Request, error) {
-	req := shared.Request{}
-	err := self.d.Decode(&req)
-	if err == nil {
-		return &req, nil
+func (self *JsonCodec) ReadRequest() (requests []*shared.Request, isBatch bool, err error) {
+	bytesInBuffer := 0
+	buf := make([]byte, MAX_REQUEST_SIZE)
+
+	deadline := time.Now().Add(READ_TIMEOUT * time.Second)
+	if err := self.c.SetDeadline(deadline); err != nil {
+		return nil, false, err
 	}
-	return nil, err
+
+	for {
+		n, err := self.c.Read(buf[bytesInBuffer:])
+		if err != nil {
+			self.c.Close()
+			return nil, false, err
+		}
+
+		bytesInBuffer += n
+
+		singleRequest := shared.Request{}
+		err = json.Unmarshal(buf[:bytesInBuffer], &singleRequest)
+		if err == nil {
+			requests := make([]*shared.Request, 1)
+			requests[0] = &singleRequest
+			return requests, false, nil
+		}
+
+		requests = make([]*shared.Request, 0)
+		err = json.Unmarshal(buf[:bytesInBuffer], &requests)
+		if err == nil {
+			return requests, true, nil
+		}
+	}
+
+	self.c.Close() // timeout
+	return nil, false, fmt.Errorf("Unable to read response")
 }
 
 func (self *JsonCodec) ReadResponse() (interface{}, error) {
-	var err error
+	bytesInBuffer := 0
 	buf := make([]byte, MAX_RESPONSE_SIZE)
-	n, _ := self.c.Read(buf)
 
-	var failure shared.ErrorResponse
-	if err = json.Unmarshal(buf[:n], &failure); err == nil && failure.Error != nil {
-		return failure, nil
+	deadline := time.Now().Add(READ_TIMEOUT * time.Second)
+	if err := self.c.SetDeadline(deadline); err != nil {
+		return nil, err
 	}
 
-	var success shared.SuccessResponse
-	if err = json.Unmarshal(buf[:n], &success); err == nil {
-		return success, nil
+	for {
+		n, err := self.c.Read(buf[bytesInBuffer:])
+		if err != nil {
+			return nil, err
+		}
+		bytesInBuffer += n
+
+		var success shared.SuccessResponse
+		if err = json.Unmarshal(buf[:bytesInBuffer], &success); err == nil {
+			return success, nil
+		}
+
+		var failure shared.ErrorResponse
+		if err = json.Unmarshal(buf[:bytesInBuffer], &failure); err == nil && failure.Error != nil {
+			return failure, nil
+		}
 	}
 
-	return nil, err
+	self.c.Close()
+	return nil, fmt.Errorf("Unable to read response")
 }
 
-// Encode response to encoded form in underlying stream
+// Decode data
 func (self *JsonCodec) Decode(data []byte, msg interface{}) error {
 	return json.Unmarshal(data, msg)
 }
 
+// Encode message
 func (self *JsonCodec) Encode(msg interface{}) ([]byte, error) {
 	return json.Marshal(msg)
 }
 
 // Parse JSON data from conn to obj
 func (self *JsonCodec) WriteResponse(res interface{}) error {
-	return self.e.Encode(&res)
+	data, err := json.Marshal(res)
+	if err != nil {
+		self.c.Close()
+		return err
+	}
+
+	bytesWritten := 0
+
+	for bytesWritten < len(data) {
+		n, err := self.c.Write(data[bytesWritten:])
+		if err != nil {
+			self.c.Close()
+			return err
+		}
+		bytesWritten += n
+	}
+
+	return nil
 }
 
 // Close decoder and encoder

rpc/comms/comms.go

@@ -43,29 +43,49 @@ type EthereumClient interface {
 	SupportedModules() (map[string]string, error)
 }
 
-func handle(conn net.Conn, api shared.EthereumApi, c codec.Codec) {
+func handle(id int, conn net.Conn, api shared.EthereumApi, c codec.Codec) {
 	codec := c.New(conn)
 
 	for {
-		req, err := codec.ReadRequest()
+		requests, isBatch, err := codec.ReadRequest()
 		if err == io.EOF {
 			codec.Close()
 			return
 		} else if err != nil {
-			glog.V(logger.Error).Infof("comms recv err - %v\n", err)
 			codec.Close()
+			glog.V(logger.Debug).Infof("Closed IPC Conn %06d recv err - %v\n", id, err)
 			return
 		}
 
-		var rpcResponse interface{}
-		res, err := api.Execute(req)
+		if isBatch {
+			responses := make([]*interface{}, len(requests))
+			responseCount := 0
+			for _, req := range requests {
+				res, err := api.Execute(req)
+				if req.Id != nil {
+					rpcResponse := shared.NewRpcResponse(req.Id, req.Jsonrpc, res, err)
+					responses[responseCount] = rpcResponse
+					responseCount += 1
+				}
+			}
 
-		rpcResponse = shared.NewRpcResponse(req.Id, req.Jsonrpc, res, err)
-		err = codec.WriteResponse(rpcResponse)
-		if err != nil {
-			glog.V(logger.Error).Infof("comms send err - %v\n", err)
-			codec.Close()
-			return
+			err = codec.WriteResponse(responses[:responseCount])
+			if err != nil {
+				codec.Close()
+				glog.V(logger.Debug).Infof("Closed IPC Conn %06d send err - %v\n", id, err)
+				return
+			}
+		} else {
+			var rpcResponse interface{}
+			res, err := api.Execute(requests[0])
+
+			rpcResponse = shared.NewRpcResponse(requests[0].Id, requests[0].Jsonrpc, res, err)
+			err = codec.WriteResponse(rpcResponse)
+			if err != nil {
+				codec.Close()
+				glog.V(logger.Debug).Infof("Closed IPC Conn %06d send err - %v\n", id, err)
+				return
+			}
 		}
 	}
 }

rpc/comms/ipc.go

@@ -2,6 +2,7 @@ package comms
 
 import (
 	"fmt"
+	"math/rand"
 	"net"
 
 	"encoding/json"
@@ -16,6 +17,7 @@ type IpcConfig struct {
 
 type ipcClient struct {
 	endpoint string
+	c        net.Conn
 	codec    codec.Codec
 	coder    codec.ApiCoder
 }
@@ -94,3 +96,7 @@ func NewIpcClient(cfg IpcConfig, codec codec.Codec) (*ipcClient, error) {
 func StartIpc(cfg IpcConfig, codec codec.Codec, offeredApi shared.EthereumApi) error {
 	return startIpc(cfg, codec, offeredApi)
 }
+
+func newIpcConnId() int {
+	return rand.Int() % 1000000
+}

rpc/comms/ipc_unix.go

@@ -18,7 +18,7 @@ func newIpcClient(cfg IpcConfig, codec codec.Codec) (*ipcClient, error) {
 		return nil, err
 	}
 
-	return &ipcClient{cfg.Endpoint, codec, codec.New(c)}, nil
+	return &ipcClient{cfg.Endpoint, c, codec, codec.New(c)}, nil
 }
 
 func (self *ipcClient) reconnect() error {
@@ -48,7 +48,10 @@ func startIpc(cfg IpcConfig, codec codec.Codec, api shared.EthereumApi) error {
 				continue
 			}
 
-			go handle(conn, api, codec)
+			id := newIpcConnId()
+			glog.V(logger.Debug).Infof("New IPC connection with id %06d started\n", id)
+
+			go handle(id, conn, api, codec)
 		}
 
 		os.Remove(cfg.Endpoint)

rpc/comms/ipc_windows.go

@@ -640,7 +640,7 @@ func newIpcClient(cfg IpcConfig, codec codec.Codec) (*ipcClient, error) {
 		return nil, err
 	}
 
-	return &ipcClient{cfg.Endpoint, codec, codec.New(c)}, nil
+	return &ipcClient{cfg.Endpoint, c, codec, codec.New(c)}, nil
 }
 
 func (self *ipcClient) reconnect() error {
@@ -668,33 +668,13 @@ func startIpc(cfg IpcConfig, codec codec.Codec, api shared.EthereumApi) error {
 				continue
 			}
 
-			go func(conn net.Conn) {
-				codec := codec.New(conn)
+			id := newIpcConnId()
+			glog.V(logger.Debug).Infof("New IPC connection with id %06d started\n", id)
 
-				for {
-					req, err := codec.ReadRequest()
-					if err == io.EOF {
-						codec.Close()
-						return
-					} else if err != nil {
-						glog.V(logger.Error).Infof("IPC recv err - %v\n", err)
-						codec.Close()
-						return
-					}
-
-					var rpcResponse interface{}
-					res, err := api.Execute(req)
-
-					rpcResponse = shared.NewRpcResponse(req.Id, req.Jsonrpc, res, err)
-					err = codec.WriteResponse(rpcResponse)
-					if err != nil {
-						glog.V(logger.Error).Infof("IPC send err - %v\n", err)
-						codec.Close()
-						return
-					}
-				}
-			}(conn)
+			go handle(id, conn, api, codec)
 		}
+
+		os.Remove(cfg.Endpoint)
 	}()
 
 	glog.V(logger.Info).Infof("IPC service started (%s)\n", cfg.Endpoint)