Question

我正在使用Socket IO v1.4.5并尝试了以下3种不同的方法，但没有任何结果。

client.emit('test', 'hahahaha');
io.sockets.socket(id).emit('test',''hahaha); 
io.sockets.connected[id].emit('test','hahaha');

这是我的服务器端

var socket = require( 'socket.io' );
var express = require( 'express' );
var http = require( 'http' );
var dateFormat = require('date-format');
var app = express();
var server = http.createServer( app );
var io = socket.listen( server );
io.sockets.on( 'connection', function( client ) {
    user[client.id]=client;

//when we receive message 
    client.on('message', function( data ) {
        console.log( 'Message received from' + data.name + ":" + data.message +' avatar' +data.avatar );
        client.emit('test', 'hahahaha');
});

任何帮助都会很棒。谢谢你的帮助.Kind Regard

Answer 1

要向特定客户发送消息，您需要这样做：

socket.broadcast.to(socketid).emit('message', 'for your eyes only');

这是一个很好的小插座作弊表：

 // sending to sender-client only
 socket.emit('message', "this is a test");

 // sending to all clients, include sender
 io.emit('message', "this is a test");

 // sending to all clients except sender
 socket.broadcast.emit('message', "this is a test");

 // sending to all clients in 'game' room(channel) except sender
 socket.broadcast.to('game').emit('message', 'nice game');

 // sending to all clients in 'game' room(channel), include sender
 io.in('game').emit('message', 'cool game');

 // sending to sender client, only if they are in 'game' room(channel)
 socket.to('game').emit('message', 'enjoy the game');

 // sending to all clients in namespace 'myNamespace', include sender
 io.of('myNamespace').emit('message', 'gg');

 // sending to individual socketid
 socket.broadcast.to(socketid).emit('message', 'for your eyes only');

归功于https://stackoverflow.com/a/10099325

最简单的方法，而不是直接发送到套接字，将为2个用户创建一个空间，并在那里自由发送消息。

socket.join('some-unique-room-name'); // Do this for both users you want to chat with each other
socket.broadcast.to('the-unique-room-name').emit('message', 'blah'); // Send a message to the chat room.

否则，您将需要跟踪每个单独的客户端套接字连接，并且当您想要聊天时，您必须查找该套接字连接并使用我上面提到的功能专门发送到该套接字连接。房间可能更容易。

Answer 2

Socket.io版本2.0.3 +

向特定套接字发送消息

    let namespace = null;
    let ns = _io.of(namespace || "/");
    let socket = ns.connected[socketId] // assuming you have  id of the socket
    if (socket) {
        console.log("Socket Connected, sent through socket");
        socket.emit("chatMessage", data);
    } else {
        console.log("Socket not connected, sending through push notification");
    }

Answer 3

只需这样做

io.socket.in('room').emit("send message to everyone", data);

在Socket IO中向特定客户端发送消息

3 个答案: