unc*_*ded 8 javascript sockets node.js cors
我最近开始学习node.js和socket.io.我遵循了一个socket.io的简单教程,在我的计算机上运行时一切正常.但是,我决定将客户端部件上传到服务器进行测试,这就是问题开始的地方.我想在Web主机上运行聊天客户端,并在我的计算机或其他主机上运行服务器.基本上,我计划在端口转发服务器,并让客户端在网页上运行.我打开我的端口向前移动它似乎正在工作,但我每次都在网页上收到错误.
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://24.151.51.34:3000/socket.io/?EIO=3&transport=polling&t=1437399007343-0. (Reason: CORS request failed).
我一直在搞乱代码,希望在开始我自己的项目之前找到解决这个问题的方法,但是我无法找到方法.客户端代码是:
<!doctype html>
<html>
<head>
<title>Socket.IO chat</title>
<style>
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font: 13px Helvetica, Arial; }
form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; }
form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; }
form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; }
#messages { list-style-type: none; margin: 0; padding: 0; }
#messages li { padding: 5px 10px; }
#messages li:nth-child(odd) { background: #eee; }
</style>
</head>
<body>
<ul id="messages"></ul>
<form action="">
<input id="m" autocomplete="off" /><button>Send</button>
</form>
<script src="https://cdn.socket.io/socket.io-1.2.0.js"></script>
<script src="http://code.jquery.com/jquery-1.11.1.js"></script>
<script>
var socket = io('24.151.51.34:3000');
$('form').submit(function(){
socket.emit('chat message', $('#m').val());
$('#m').val('');
return false;
});
socket.on('chat message', function(msg){
$('#messages').append($('<li>').text(msg));
});
</script>
</body>
</html>
对于服务器代码,我尝试添加代码以允许CORS,但实际上不确定该怎么做:
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
io.set('origins', 'http://browsercombat.com:80');
app.use(function(req, res, next) {
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
res.header("Access-Control-Allow-Methods", "POST, GET, PUT, DELETE, OPTIONS");
res.header("Access-Control-Allow-Credentials", "true");
next();
});
app.get('/', function(req, res, next) {
res.sendFile(__dirname + '/index.html');
});
app.post('/', function(req, res, next) {
// Handle the post for this route
});
io.on('connection', function(socket){
socket.on('chat message', function(msg){
io.emit('chat message', msg);
});
});
http.listen(3000, function(){
console.log('listening on *:3000');
});
tna*_*uat 10
除了使用 cors 包外，我还通过向 socketio 创建添加选项来修复它。从版本 3 cors 配置开始，您必须添加这些选项。也适用于套接字版本 2.xx。
const io = socketio(httpServer, {
cors: {
origin: "http://localhost:3000",
methods: ["GET", "POST"],
credentials: true
}
});
这是资源https://socket.io/docs/v3/handling-cors/
奖励：如果您遇到错误请求，请确保客户端和服务器具有相同版本的 socket.io。