需要帮助克服跨域问题的帮助,使用服务器端上的节点和客户端的JS



我正在端口8081上运行HTTP服务器,并试图使用GetJson jQuery函数获得JSON。但是,我总是在跨域(CORS)问题上运行。我正在考虑使用JSONP,但是不确定如何在我的node.js脚本上实现它。

  headers["Access-Control-Allow-Origin"] = "*";
  headers["Access-Control-Allow-Methods"] = "POST, GET, PUT, DELETE, OPTIONS";
  headers["Access-Control-Allow-Credentials"] = false;
  headers["Access-Control-Allow-Headers"] = "Content-Type,X-Requested-With, X-PINGOTHER";
  headers["Access-Control-Max-Age"] = 86400;
  response.writeHead(200, headers);
  var objToJson = {"response":res };
  response.write(JSON.stringify(objToJson));

这是我的客户端代码。

    jQuery.getJSON('http://localhost:8081', function(data) {
    console.log(data);
    }); 

您可以调整此PHP脚本,逻辑非常简单。学分:https://stackoverflow.com/a/1678243

if (array_key_exists('callback', $_GET)) {
    // JSONP String
    header('Content-Type: text/javascript; charset=utf8');
    header('Access-Control-Allow-Origin: *');
    header('Access-Control-Max-Age: 0');
    header('Access-Control-Allow-Methods: GET');
    $callback = $_GET['callback'];
    echo $callback . '(' . $data . ');';
} else {
    // JSON String
    header('Content-Type: application/json; charset=utf8');
    echo $data;
}

不知道你在做什么错,但是我复制了您的代码,填充了空白,对我有用(在Firefox 16和Chrome 24上)。

这是我的CORS演示:

  • app.js

    var http = require('http');
    http.createServer(function(request, response) {
      var headers = {};
      headers["Access-Control-Allow-Origin"] = "*";
      headers["Access-Control-Allow-Methods"] = "POST, GET, PUT, DELETE, OPTIONS";
      headers["Access-Control-Allow-Credentials"] = false;
      headers["Access-Control-Allow-Headers"] = "Content-Type,X-Requested-With, X-PINGOTHER";
      headers["Access-Control-Max-Age"] = 86400;
      response.writeHead(200, headers);
      var objToJson = {"response": "hello cors" };
      response.write(JSON.stringify(objToJson));
      response.end()
    }).listen(8081)
    
  • index.html

    <!DOCTYPE html>
    <html>
    <head>
    <meta charset=utf-8 />
    <title>CORS demo</title>
    </head>
    <body>
      view results in the console
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.js"></script>
      <script type=text/javascript>
        jQuery.getJSON('http://localhost:8081', function(data) {
          console.log(data);
        });
      </script>
    </body>
    </html>
    

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