mirror of https://github.com/ethereum/go-ethereum
Péter Szilágyi
9 years ago
parent
900e124bee
commit
df75dbfd68
@ -0,0 +1,111 @@ |
||||
// Copyright 2016 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 rpc |
||||
|
||||
import "encoding/json" |
||||
|
||||
// NewInProcRPCClient creates an in-process buffer stream attachment to a given
|
||||
// RPC server.
|
||||
func NewInProcRPCClient(handler *Server) Client { |
||||
buffer := &inprocBuffer{ |
||||
requests: make(chan []byte, 16), |
||||
responses: make(chan []byte, 16), |
||||
} |
||||
client := &inProcClient{ |
||||
server: handler, |
||||
buffer: buffer, |
||||
} |
||||
go handler.ServeCodec(NewJSONCodec(client.buffer)) |
||||
return client |
||||
} |
||||
|
||||
// inProcClient is an in-process buffer stream attached to an RPC server.
|
||||
type inProcClient struct { |
||||
server *Server |
||||
buffer *inprocBuffer |
||||
} |
||||
|
||||
// Close tears down the request channel of the in-proc client.
|
||||
func (c *inProcClient) Close() { |
||||
c.buffer.Close() |
||||
} |
||||
|
||||
// Send marshals a message into a json format and injects in into the client
|
||||
// request channel.
|
||||
func (c *inProcClient) Send(msg interface{}) error { |
||||
d, err := json.Marshal(msg) |
||||
if err != nil { |
||||
return err |
||||
} |
||||
c.buffer.requests <- d |
||||
return nil |
||||
} |
||||
|
||||
// Recv reads a message from the response channel and tries to parse it into the
|
||||
// given msg interface.
|
||||
func (c *inProcClient) Recv(msg interface{}) error { |
||||
data := <-c.buffer.responses |
||||
return json.Unmarshal(data, &msg) |
||||
} |
||||
|
||||
// Returns the collection of modules the RPC server offers.
|
||||
func (c *inProcClient) SupportedModules() (map[string]string, error) { |
||||
return SupportedModules(c) |
||||
} |
||||
|
||||
// inprocBuffer represents the connection between the RPC server and console
|
||||
type inprocBuffer struct { |
||||
readBuf []byte // store remaining request bytes after a partial read
|
||||
requests chan []byte // list with raw serialized requests
|
||||
responses chan []byte // list with raw serialized responses
|
||||
} |
||||
|
||||
// Read will read the next request in json format.
|
||||
func (b *inprocBuffer) Read(p []byte) (int, error) { |
||||
// last read didn't read entire request, return remaining bytes
|
||||
if len(b.readBuf) > 0 { |
||||
n := copy(p, b.readBuf) |
||||
if n < len(b.readBuf) { |
||||
b.readBuf = b.readBuf[:n] |
||||
} else { |
||||
b.readBuf = b.readBuf[:0] |
||||
} |
||||
return n, nil |
||||
} |
||||
// read next request
|
||||
req := <-b.requests |
||||
n := copy(p, req) |
||||
if n < len(req) { |
||||
// inprocBuffer too small, store remaining chunk for next read
|
||||
b.readBuf = req[n:] |
||||
} |
||||
return n, nil |
||||
} |
||||
|
||||
// Write sends the given buffer to the backend.
|
||||
func (b *inprocBuffer) Write(p []byte) (n int, err error) { |
||||
b.responses <- p |
||||
return len(p), nil |
||||
} |
||||
|
||||
// Close cleans up obtained resources.
|
||||
func (b *inprocBuffer) Close() error { |
||||
close(b.requests) |
||||
close(b.responses) |
||||
|
||||
return nil |
||||
} |
||||
Loading…
Reference in new issue