Socket.io与本地客户端。 Origin null和Access-Control-Allow-Origin

Question

I'm trying to test a simple socket.io example with a local client. 我正在尝试使用本地客户端测试一个简单的socket.io示例。 Here is my code: 这是我的代码：

server: 服务器：

var sio = require('socket.io');
var io = sio.listen(8077, {log: false});

io.sockets.on('connection', function (socket) {
    console.log('connection detected');
    socket.on('hello', function(data){
        console.log('hello received: ' + data);
    });
});

client: 客户：

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
  <head>
    <script src="socket.io-client/dist/socket.io.js" type="text/javascript"></script>
  </head>
  <body>
    <script type="text/javascript">
      var socket = io.connect('http://localhost:8077');
      if(socket != undefined){
          socket.emit('hello', 'this is a test');
      }
    </script>
  </body>
</html>

If I put my client in a remote server, it runs perfectly, but if I try to run my client from local, my browser gives me the following error: 如果我将我的客户端放在远程服务器上，它运行完美，但如果我尝试从本地运行我的客户端，我的浏览器会给我以下错误：

XMLHttpRequest cannot load http://localhost:8077/socket.io/1/?t=1343494806858.
Origin null is not allowed by Access-Control-Allow-Origin

I know that there is a http header which solves this problem in a http server, but I don't know if there is a similar option in sockets context. 我知道有一个http头在http服务器中解决了这个问题，但我不知道在套接字上下文中是否有类似的选项。 I need a local client. 我需要一个本地客户。 I don't want to serve the client code from an extra http nodejs server. 我不想从额外的http nodejs服务器提供客户端代码。

Answer 1

Have you tried setting the server origins parameter (it sets the header you mentioned)?: 您是否尝试过设置server origin参数（它设置了您提到的标题）？：

var sio = require('socket.io');
var io = sio.listen(8077, {log: false, origins: '*:*'});

Also now your not accessing that server locally, have you made sure to update the line: 此外，您现在无法在本地访问该服务器，请确保更新该行：

var socket = io.connect('http://localhost:8077');

to include the ip (or domain if you have one) of the remote server: 包括远程服务器的ip（或域名，如果有的话）：

var socket = io.connect('http://XX.XX.XX.XX:8077');

Can you see what line returns the error in the console (you using chrome/ff with firebug?). 你能看到哪一行在控制台中返回错误（你使用chrome / ff和firebug吗？）。 In the if statement the socket variable will probably never by undefined. 在if语句中，socket变量可能永远不会是未定义的。 The the recommended way to use the connection is to wait for it to be ready by attaching a callback to the connect event, eg: 使用连接的推荐方法是通过将回调附加到connect事件来等待它准备就绪，例如：

socket.on('connect', function () {  // <-instead of the if
    socket.emit('hello', 'this is a test');
}

Socket.io与本地客户端。 Origin null和Access-Control-Allow-Origin

问题描述

1 个解决方案

解决方案1
4 2012-07-28 17:31:31

Socket.io与本地客户端。 Origin null和Access-Control-Allow-Origin

问题描述

1 个解决方案

解决方案1 4 2012-07-28 17:31:31

解决方案1
4 2012-07-28 17:31:31