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我最近開始學習node.js和socket.io。我跟着一個簡單的教程,socket.io有,而且在我的電腦上運行時,它一切正常。但是,我決定將客戶端部分上傳到服務器進行測試,這就是問題出現的地方。我想在Web主機上運行聊天客戶端,然後在我的計算機或其他主機上運行服務器。基本上,我計劃端口轉發服務器,並讓客戶端運行在網頁上。我打開我的端口來端口,它似乎工作,但我每次都在網頁上發生錯誤。CORS用node.js和socket.io阻止
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).
我已經用代碼瞎搞在開始自己的項目之前找到解決這個問題的希望,但我不能想出一個辦法。客戶端代碼是:
<!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>
對於服務器代碼,我嘗試添加代碼,讓CORS,但真的不知道該怎麼做:
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');
});
myip是什麼? – Bergi
啊,忘了提及我是連接到我的ip的端口轉發,我決定用「myip」替換它。 – uncoded
Express和socket.io的CORS代碼示例:http://enable-cors.org/server_expressjs.html和http://stackoverflow.com/questions/24058157/socket-io-node-js-cross-origin-請求攔截。 – jfriend00