jQuery-获取AJAX响应标头 [英] jQuery - get AJAX response headers

问题描述

当我们使用jQuery触发ajax请求时，如何访问响应标头?根据某些网站提供的建议，我尝试使用以下代码.但是xhr对象作为null来了.我在此上下文中看到一个xhr对象.但是它没有访问响应头的方法.

How do we get access to the response headers when we fire an ajax request using jQuery? I tried with the below code as per the suggestions given in some sites. But xhr object is coming as null. I see an xhr object in this context. But it doesn't have methods to access response headers.

    function SampleMethod(){
    var savedThis=this;
        this.invokeProcedure=function(procedurePath){
            $.ajax({
                    type: "GET",
                    url: procedurePath,
                    dataType: "json",
                    success: function(data,status,xhr){savedThis.resultSetHandler(data,status,xhr);}
                });
        }

        this.resultSetHandler=function(data,status,xhrObj){
            //Handle the result
        }

        this.errorHandler=function(args){
            //Handle the result
        }

    }

var sampleObj=new SampleMethod();
sampleObj.invokeProcedure('url');

推荐答案

为了与XMLHttpRequest向后兼容，将使用jqXHR对象 公开以下属性和方法: getAllResponseHeaders() 和 getResponseHeader(). 从$ .ajax()文档中: http://api.jquery.com/jQuery.ajax/

For backward compatibility with XMLHttpRequest, a jqXHR object will expose the following properties and methods: getAllResponseHeaders() and getResponseHeader(). From the $.ajax() doc : http://api.jquery.com/jQuery.ajax/

对于jQuery> 1.3

For jQuery > 1.3

success: function(res, status, xhr) { 
  alert(xhr.getResponseHeader("myHeader"));
}

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