我试图连接到唯一的 api 但不起作用，给我一个错误：
XMLHttpRequest cannot load https://api.sports/socket.io/?api_key=aredasdasdadds&EIO=3&transport=polling&t=LsYSPsv. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8000' is therefore not allowed access. The response had HTTP status code 596.
奇怪的是错误显示不同的 api 网址。
我的代码是：
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<h1>Web socket</h1>
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.0.3/socket.io.js"></script>
<script type="text/javascript">
// Create SocketIO instance, connect
var socket = new io('https://api.sports.com/soccer-/eu/en/matches/summary.json?api_key=aredasdasdadds');
socket.connect();
// Add a connect listener
socket.on('connect',function() {
console.log('Client has connected to the server!');
});
// Add a connect listener
socket.on('message',function(data) {
console.log('Received a message from the server!',data);
});
// Sends a message to the server via sockets
function sendMessageToServer(message) {
socket.send(message);
}
</script>
</body>
</html>
你的服务器是什么？
首先，您必须检查客户端和服务器上的 socket.io 版本是否相同(我看到客户端上的版本是 2.0.3(。
其次，您只需要像这样使用Web的域：
var socket = io.connect('ws://https://api.sports.com:8443/', {transports: ['websocket']});
并设置端口监听，通常为8443为https。
问候！