19

所以我试图通过 jQuery get 从标头响应中获取位置。我尝试使用 getResponseHeader('Location') 和 getAllResponseHeaders() 但它们似乎都返回 null。

这是我当前的代码

$(document).ready(function(){
   var geturl;
   geturl = $.ajax({
      type: "GET",
      url: 'http://searchlight.cluen.com/E5/Login.aspx?URLKey=uzr7ncj8)',
   });
   var locationResponse = geturl.getResponseHeader('Location');
   console.log(locationResponse);
});
4

3 回答 3

33

当异步请求返回时，标头将可用，因此您需要在成功回调中读取它们：

$.ajax({
    type: "GET",
    url: 'http://searchlight.cluen.com/E5/Login.aspx?URLKey=uzr7ncj8)',
    success: function(data, status, xhr) {
        console.log(xhr.getResponseHeader('Location'));
    }
});
于 2012-06-27T10:26:06.307 回答
7

对于 jQuery Ajax 中的某些标头，您需要访问 XMLHttpRequest 对象

var xhr;
var _orgAjax = jQuery.ajaxSettings.xhr;
jQuery.ajaxSettings.xhr = function () {
  xhr = _orgAjax();
  return xhr;
};

$.ajax({
    type: "GET",
    url: 'http://example.com/redirect',
    success: function(data) {
        console.log(xhr.responseURL);
    }
});

或使用纯 javascript

var xhr = new XMLHttpRequest();
xhr.open('GET', "http://example.com/redirect", true);

xhr.onreadystatechange = function () {
  if (this.readyState == 4 && this.status == 200) {
    console.log(xhr.responseURL);
  }
};

xhr.send();
于 2017-01-30T05:42:00.737 回答
6

jQuery 将 XMLHttpRequest 对象抽象为所谓的“超集”，它不公开 responseURL 字段。在他们的文档中，他们谈论“jQuery XMLHttpRequest (jqXHR) 对象”

For backward compatibility with XMLHttpRequest, a jqXHR object will expose the following properties and methods:

readyState
responseXML and/or responseText when the underlying request responded with xml and/or text, respectively
status
statusText
abort( [ statusText ] )
getAllResponseHeaders() as a string
getResponseHeader( name )
overrideMimeType( mimeType )
setRequestHeader( name, value ) which departs from the standard by replacing the old value with the new one rather than concatenating the new value to the old one
statusCode( callbacksByStatusCode )
No onreadystatechange mechanism is provided, however, since done, fail, always, and statusCode cover all conceivable requirements.

如您所见，没有办法获取响应 URL，因为 jqXHR API 没有公开它

于 2017-08-17T13:03:41.070 回答