socket.io和node.js在本地主機上給出錯誤

Question

我有一個在192.168.1.22上工作的開發服務器，我想在上面運行node.js，但它給出了一些錯誤。 我只想測試一些情況，甚至無法運行它。 在我運行它之后，我將獲取我的onclick按鈕，並從node.js發送該帖子到我的php文件。 並將數據從php返回到node.js，將返回的數據返回到網站。

我的js：

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

server = http.createServer(function(req, res){
    res.writeHead(200, {'Content-Type': 'text/html'});
    res.write('<h1>Sample server created with NodeJS.</h1>');
    res.end();
});
server.listen(8001);

// socket.io 
var socket = io.listen(server); 
socket.on('connection', function(client){ 
  client.send('Hello client'); 
  client.on('message', function(){
     client.send((new Date()).getTime());
  })
}); 

我的html：

  <script type="text/javascript" src="http://cdn.socket.io/stable/socket.io.js"></script>
  <script type="text/javascript">
    var socket = new io.Socket(null, {port: 8001});

    socket.connect();
    socket.on('message', function(message){
        document.getElementById('divTime').innerHTML = message;
    });     
    function GetServerTime() {
        socket.send('');
    }  
  </script>

錯誤：

WebSocket connection to 'ws://192.168.1.22:8001/socket.io/websocket' failed: Connection closed before receiving a handshake response socket.io.js:378
XMLHttpRequest cannot load http://192.168.1.22:8001/socket.io/xhr-polling//1401170092339. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://192.168.1.22:8000' is therefore not allowed access. (index):1
WebSocket connection to 'ws://192.168.1.22:8001/socket.io/websocket' failed: Connection closed before receiving a handshake response socket.io.js:378
XMLHttpRequest cannot load http://192.168.1.22:8001/socket.io/xhr-polling//1401170102339. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://192.168.1.22:8000' is therefore not allowed access. (index):1
WebSocket connection to 'ws://192.168.1.22:8001/socket.io/websocket' failed: Connection closed before receiving a handshake response 

Answer 1

從該錯誤來看，您似乎正在嘗試從另一個端口連接到該服務器：

No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://192.168.1.22:8000' is therefore not allowed access. (index):1

您上面粘貼的服務器代碼（標記為“ my js”）看起來不錯。 一旦安裝了socket.io程序包，就可以在本地運行相同的代碼。 因此，問題可能不在於啟動服務器代碼，而是在於啟動后連接到服務器代碼？ 如果是這樣，您上面的錯誤就指向一個同源策略問題。 如果您從節點應用程序中托管HTML代碼，並且該代碼運行在同一端口上，則不會出現此問題。