javascript - 套接字 IO 事件发射

Question

我试图让客户端与服务器对话，但无法接收客户端发出的事件。每当客户端连接时，服务器 console.logs connected to localhost:61201 都会建立连接；但是，客户端不定期发出的 clientEvents 没有响应。

服务器.js

const port = 61201;
const ipAddress = "127.0.0.1"

var http = require('http');
var io = require('socket.io');
var server = http.createServer();
server.listen(port, ipAddress);
var socket = io.listen(server);

socket.on('connect', () => {
    console.log('connected to localhost:61201');
    socket.on('clientEvent', function (data) {
        console.log('message from the client:', data);
        socket.emit('serverEvent', "thanks server! for sending '" + data + "'");
    });
});

客户端.js

const port = 61201;
const ipAddress = "127.0.0.1";
const url = 'http://' + ipAddress + ':' + port;

var io = require('socket.io-client');

var socket = io(url);

socket.on('connect', () => {
    socket.on('serverEvent', function (data) {
        console.log('new message from the server:', data);
    });
    setInterval(function () {
        socket.emit('clientEvent', Math.random());
        console.log('message sent from the client');
    }, 3000);
});

Answer 1

您需要使用 connect 事件返回的 socket 对象。试试这个

socket.on('connect', (clientSocket) => {
    console.log('connected to localhost:61201');
    clientSocket.on('clientEvent', function (data) {
        console.log('message from the client:', data);
        clientSocket.emit('serverEvent', "thanks server! for sending '" + data + "'");
    });
});