GET http://localhost:3306/socket.io/?EIO=3&transport=polling&t=NQfLxAy net::ERR_INVALID_HTTP_RESPONSE

如何解决GET http://localhost:3306/socket.io/?EIO=3&transport=polling&t=NQfLxAy net::ERR_INVALID_HTTP_RESPONSE

我正在使用 Node.js 构建一个实时聊天框。所以现在我只想将用户输入的名称显示到控制台中。但它不会那样做。请帮我解决这个问题，我将不胜感激。

index.PHP

    <!-- include jquery and socket IO -->
<script src="js/jquery.js"></script>
<script src="js/socket.io.js"></script>

<!-- create a form to enter username -->
<form onsubmit="return enterName();">
    <input type="text" name="name" id="name" placeholder="Enter name">
    <input type="submit" name="submit">
</form>

<script>
    res.setHeader('Access-Control-Allow-Origin',"localhost:3000");
    //creating io instance
    var socket = io("http://localhost:3000");

    function enterName(){
        //get username
        var name = document.getElementById("name").value;

        //send it to server
        socket.emit("user_connected",name);

        //prevent the form from submiting
        return false;
    }

    //listen from server
    socket.on("user_connected",function (username){
        console.log(username);
    });
</script>

server.js

    //creating express instance
var express = require("express");
var app = express();

//creating http instance
var http = require("http").createServer(app);

//creating socket io instance
var io = require("socket.io")(http);

io.on("connection",function (socket){
    console.log("User connected",socket.id);

    // attach incoming listener for new user
    socket.on("user_connected",function (username) {
        // save in array
        users[username] = socket.id;

        // socket ID will be used to send message to individual person

        // notify all connected clients
        io.emit("user_connected",username);
    });
});

//start the server
http.listen(3000,function(){
    console.log("Server started");
});

问题出在 index.PHP 中。请让我知道您认为问题可能出在哪里，如果可能，您也可以尝试我的 index.PHP 并对其进行编辑并使其工作。太感谢了！ :)

解决方法

http.listen(3000,function(){
    console.log("Server started");
});

和

var socket = io("http://localhost:3306");

似乎使用了不同的端口。