85 lines
2.8 KiB
Go
85 lines
2.8 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package rpc
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import (
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"encoding/json"
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"net"
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)
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// CreateIPCListener creates an listener, on Unix platforms this is a unix socket, on Windows this is a named pipe
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func CreateIPCListener(endpoint string) (net.Listener, error) {
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return ipcListen(endpoint)
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}
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// ipcClient represent an IPC RPC client. It will connect to a given endpoint and tries to communicate with a node using
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// JSON serialization.
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type ipcClient struct {
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endpoint string
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conn net.Conn
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out *json.Encoder
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in *json.Decoder
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}
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// NewIPCClient create a new IPC client that will connect on the given endpoint. Messages are JSON encoded and encoded.
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// On Unix it assumes the endpoint is the full path to a unix socket, and Windows the endpoint is an identifier for a
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// named pipe.
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func NewIPCClient(endpoint string) (*ipcClient, error) {
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conn, err := newIPCConnection(endpoint)
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if err != nil {
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return nil, err
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}
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return &ipcClient{endpoint: endpoint, conn: conn, in: json.NewDecoder(conn), out: json.NewEncoder(conn)}, nil
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}
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// Send will serialize the given message and send it to the server.
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// When sending the message fails it will try to reconnect once and send the message again.
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func (client *ipcClient) Send(msg interface{}) error {
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if err := client.out.Encode(msg); err == nil {
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return nil
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}
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// retry once
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client.conn.Close()
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conn, err := newIPCConnection(client.endpoint)
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if err != nil {
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return err
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}
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client.conn = conn
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client.in = json.NewDecoder(conn)
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client.out = json.NewEncoder(conn)
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return client.out.Encode(msg)
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}
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// Recv will read a message from the connection and tries to parse it. It assumes the received message is JSON encoded.
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func (client *ipcClient) Recv(msg interface{}) error {
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return client.in.Decode(&msg)
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}
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// Close will close the underlying IPC connection
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func (client *ipcClient) Close() {
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client.conn.Close()
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}
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// SupportedModules will return the collection of offered RPC modules.
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func (client *ipcClient) SupportedModules() (map[string]string, error) {
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return SupportedModules(client)
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}
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