错误:http://localhost:3001/socket.io/404(未找到) [英] Error: http://localhost:3001/socket.io/ 404 (Not Found)

问题描述

我正在尝试使用socket.io连接客户端-服务器，但是在测试我的代码时，出现此错误

I am trying to connect client-server using socket.io however at the moment of testing my code I am getting this error http://localhost:3001/socket.io/?EIO=3&transport=polling&t=MgUqscg 404 (Not Found)

我已经尝试了两种不同的方法来实现这一目标.一个返回已指定的错误，第二个返回错误监听EADDRINUSE ::: 3001 有人可以向我解释我做错了什么吗?所有教程看起来都很简单，但是我现在还停留在这一点，我真的想学习如何使用套接字来提高自己的技能.

I already tried two different ways to achieve this. One returns the error already specified the second one returns an error listen EADDRINUSE :::3001 can somebody please explain to me what am I doing wrong? all tutorials seem so easy but I am stuck at this point and I really want to learn how to use sockets to improve my skills.

这是我用于服务器

const express = require('express');
const http = require('http');
const app = express();
// Web socket config option #1
var server   = http.Server(app);
var io       = require('socket.io')(server);

// Web socket config option #2
var io       = require('socket.io').listen(server);
server.listen(PORT)

const PORT = process.env.PORT || 3001;
app.set('port', 3000)

io.on('connection', (socket) =>{
    console.log('a user is connected')
})

app.listen(PORT, function(){
    console.log(' ======= SERVER RUNNING =======');
})

这是我给客户

import * as io from 'socket.io-client';

private socket = io(`http://localhost:3001`)

我只想成功连接客户端-服务器而不会出现错误，并打印以控制台显示成功消息.预先感谢.

I just want to connect client-server successfully without errors and print to console a success message. Thanks in advance.

推荐答案

我通过使用其他端口发送secket.io事件解决了该问题. server.listen(4444)

I solved it by using a different port for sending secket.io events. server.listen(4444)

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