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);
});
【问题讨论】：
标签： javascript jquery ajax response
当 异步 请求返回时，标头将可用，因此您需要在 success callback 中阅读它们：
$.ajax({
type: "GET",
url: 'http://searchlight.cluen.com/E5/Login.aspx?URLKey=uzr7ncj8)',
success: function(data, status, xhr) {
console.log(xhr.getResponseHeader('Location'));
}
});
【讨论】：
complete: function(xhr){ console.log(xhr.getAllResponseHeaders()); }
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();
【讨论】：
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，他们谈到了“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
【讨论】：