forked from mirror/go-ethereum
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
84 lines
2.8 KiB
84 lines
2.8 KiB
// 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 rpc
|
|
|
|
import (
|
|
"encoding/json"
|
|
"net"
|
|
)
|
|
|
|
// CreateIPCListener creates an listener, on Unix platforms this is a unix socket, on Windows this is a named pipe
|
|
func CreateIPCListener(endpoint string) (net.Listener, error) {
|
|
return ipcListen(endpoint)
|
|
}
|
|
|
|
// ipcClient represent an IPC RPC client. It will connect to a given endpoint and tries to communicate with a node using
|
|
// JSON serialization.
|
|
type ipcClient struct {
|
|
endpoint string
|
|
conn net.Conn
|
|
out *json.Encoder
|
|
in *json.Decoder
|
|
}
|
|
|
|
// NewIPCClient create a new IPC client that will connect on the given endpoint. Messages are JSON encoded and encoded.
|
|
// On Unix it assumes the endpoint is the full path to a unix socket, and Windows the endpoint is an identifier for a
|
|
// named pipe.
|
|
func NewIPCClient(endpoint string) (Client, error) {
|
|
conn, err := newIPCConnection(endpoint)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &ipcClient{endpoint: endpoint, conn: conn, in: json.NewDecoder(conn), out: json.NewEncoder(conn)}, nil
|
|
}
|
|
|
|
// Send will serialize the given message and send it to the server.
|
|
// When sending the message fails it will try to reconnect once and send the message again.
|
|
func (client *ipcClient) Send(msg interface{}) error {
|
|
if err := client.out.Encode(msg); err == nil {
|
|
return nil
|
|
}
|
|
|
|
// retry once
|
|
client.conn.Close()
|
|
|
|
conn, err := newIPCConnection(client.endpoint)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
client.conn = conn
|
|
client.in = json.NewDecoder(conn)
|
|
client.out = json.NewEncoder(conn)
|
|
|
|
return client.out.Encode(msg)
|
|
}
|
|
|
|
// Recv will read a message from the connection and tries to parse it. It assumes the received message is JSON encoded.
|
|
func (client *ipcClient) Recv(msg interface{}) error {
|
|
return client.in.Decode(&msg)
|
|
}
|
|
|
|
// Close will close the underlying IPC connection
|
|
func (client *ipcClient) Close() {
|
|
client.conn.Close()
|
|
}
|
|
|
|
// SupportedModules will return the collection of offered RPC modules.
|
|
func (client *ipcClient) SupportedModules() (map[string]string, error) {
|
|
return SupportedModules(client)
|
|
}
|
|
|