javascript - CORS Node.js 服务器

Question

我对 Node.js 完全陌生，只是想运行一些示例代码，但是我不断遇到 CORS 问题。

服务器.js

    var http = require('http');
    var io = require('socket.io');

 server = http.createServer(function(req, res){    
 });
server.listen(8080);
// socket.io
var socket = io.listen(server,  { origins: '*:*' });

// Enables CORS
var enableCORS = function(req, res, next) {
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization, Content-   Length, X-Requested-With');

// intercept OPTIONS method
if ('OPTIONS' == req.method) {
  res.send(200);
}
else {
  next();
}
};


// enable CORS!
socket.use(enableCORS);
//--------------
socket.on('connection', function(client){
  client.on('message', function(msg){
  socket.broadcast(msg);
  })
}); 

客户端代码:

var socket = io.connect('127.0.0.7:8080');
socket.on('message', function(msg){
alert(msg);
console.log(msg);
});

我尝试为 node.js 安装 CORS 模块，但我不断在 Firefox 调试器中收到消息，但我仍然不断收到此消息:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://8080/socket.io/1/?t=1400151675528. This can be fixed by moving the resource to the same domain or enabling CORS.
ReferenceError: socket is not defined client2.html:8
ReferenceError: socket is not defined

Answer 1

仅在目标服务器上设置 CORS header 是不够的。您还需要为为您的客户端 HTML 文件提供服务的 Web 服务器设置适当的 header 。

由于您没有提及如何提供客户端文件，因此我无法为您发布正确的解决方案。但如果您使用 Apache httpd，您可以将以下内容放入配置或 .htaccess 中:

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