node.js - Nodejs : disconnected client from the server by socketio

Question

我尝试使用 socket.io 以实时形式发送数据，以便创建服务器:

const http = require('http').createServer();
const socket = require('socket.io')(http);

socket.on('connection', socket => {

    console.log('connected:', socket.client.id);

    socket.on('start', data => {
        console.log('new message from client:', data);
    });

    socket.on("disconnect", () => console.log("Client disconnected"));
});

http.listen(3000, () => console.log(`server listening on port: ${3000}`))

在客户端部分我创建这个脚本:

const socket = require('socket.io-client')('http://localhost:3000');

socket.on('connect', () => {
    // socket connected
    socket.emit('start', { my: 'data' });
    setInterval(() => {
        socket.disconnect();
    }, 1000);

});

想象一下，客户端连接到服务器并向服务器发送数据之后想要与服务器断开连接，所以我输入以下命令:

setInterval(() => {
    socket.disconnect();
}, 1000);

当执行此命令时，我收到此错误:

D:\Projects\NodeJs\SafaProjects\socket\client>node client.js
D:\Projects\NodeJs\SafaProjects\socket\client\node_modules\socket.io-client\lib\socket.js:136
Socket.prototype.emit = function (ev) {
                                 ^

RangeError: Maximum call stack size exceeded
    at Socket.emit (D:\Projects\NodeJs\SafaProjects\socket\client\node_modules\socket.io-client\lib\socket.js:136:34)
    at Socket.socket.on (D:\Projects\NodeJs\SafaProjects\socket\client\client.js:13:12)     
    at Socket.Emitter.emit (D:\Projects\NodeJs\SafaProjects\socket\client\node_modules\component-emitter\index.js:133:20)
    at Socket.emit (D:\Projects\NodeJs\SafaProjects\socket\client\node_modules\socket.io-client\lib\socket.js:138:10)
    at Socket.socket.on (D:\Projects\NodeJs\SafaProjects\socket\client\client.js:13:12)     
    at Socket.Emitter.emit (D:\Projects\NodeJs\SafaProjects\socket\client\node_modules\component-emitter\index.js:133:20)
    at Socket.emit (D:\Projects\NodeJs\SafaProjects\socket\client\node_modules\socket.io-client\lib\socket.js:138:10)
    at Socket.socket.on (D:\Projects\NodeJs\SafaProjects\socket\client\client.js:13:12)     
    at Socket.Emitter.emit (D:\Projects\NodeJs\SafaProjects\socket\client\node_modules\component-emitter\index.js:133:20)
    at Socket.emit (D:\Projects\NodeJs\SafaProjects\socket\client\node_modules\socket.io-client\lib\socket.js:138:10)

客户端如何才能不出错地与服务器断开连接？

Answer 1

因为你一遍又一遍地调用socket.disconnect()。向 socket.emit() 提供回调函数，在其中调用 socket.disconnect。

服务器

const http = require('http').createServer();
const socket = require('socket.io')(http);

socket.on('connection', socket => {

    console.log('connected:', socket.client.id);

    socket.on('start', data => {
        console.log('new message from client:', data);
        socket.emit ('messageSuccess', data);
    });

    socket.on("disconnect", () => console.log("Client disconnected"));
});

http.listen(3000, () => console.log(`server listening on port: ${3000}`))

客户端

const socket = require('socket.io-client')('http://localhost:3000');

socket.on('connect', () => {
    // socket connected
    socket.emit('start', { my: 'data' };

socket.on ('messageSuccess', function (data) {
 socket.disconnect();
});
});