socket.io+node.js跨源请求被阻止

Question

var express = require('express'),
    app = express(), 
    server = require('http').createServer(app),
    io = require('socket.io').listen(server),
    path = require('path');
server.listen(3000);

app.get('/', function(req, res) {
    res.sendfile(__dirname + '/public/index.html');
});

var socket = io.connect('//waleedahmad.kd.io:3000/');

<script type="text/javascript" src="//waleedahmad.kd.io:3000/socket.io/socket.io.js"></script>

我也在应用程序根目录中使用。htaccess文件。（waleedahmad.kd.io/node）。

Header add Access-Control-Allow-Origin "*"
Header add Access-Control-Allow-Headers "origin, x-requested-with, content-type"
Header add Access-Control-Allow-Methods "PUT, GET, POST, DELETE, OPTIONS"

Answer 1

注意：不要使用“Socketio”包装...改用“socket.io”。“Socketio”已经过时了。有些用户似乎使用了错误的软件包。

socket.io v3

文档：https://socket.io/docs/v3/handling-cors/

cors选项：https://www.npmjs.com/package/cors

const io = require('socket.io')(server, {
  cors: {
    origin: '*',
  }
});

socket.io

const io = require('socket.io')(server, { origins: '*:*'});

或

io.set('origins', '*:*');

或

io.origins('*:*') // for latest version