XmlHttpRequest getAllResponseHeaders（）不返回所有标头

本文介绍了XmlHttpRequest getAllResponseHeaders（）不返回所有标头的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在尝试从ajax请求中获取响应标头，但jQuery的getAllResponseHeaders xhr方法仅显示 Content-Type标头。有人知道为什么吗？

I'm trying to get the response headers from an ajax request but jQuery's getAllResponseHeaders xhr method only displays the "Content-Type" header. Anyone know why?

这是响应标头 Access-Control-Allow-Credentials：true Access-Control-Allow-标头：如果自修改，缓存控制，内容类型，保持活动，X请求使用，授权 Access-Control-Allow-方法：GET，PUT，POST，DELETE，OPTIONS Access-Control-Allow-Origin：* Access-Control-Max-Age：1728000 授权：apikey = apikey1 AuthenticationToken = 62364GJHGJHG 连接：keep-alive 内容长度：240 内容类型：application / json ; charset = utf-8 X-Powered-By：Express

This is the response header Access-Control-Allow-Credentials:true Access-Control-Allow-Headers:If-Modified-Since, Cache-Control, Content-Type, Keep-Alive, X-Requested-With, Authorization Access-Control-Allow-Methods:GET, PUT, POST, DELETE, OPTIONS Access-Control-Allow-Origin:* Access-Control-Max-Age:1728000 Authorization:apikey="apikey1" AuthenticationToken="62364GJHGJHG" Connection:keep-alive Content-Length:240 Content-Type:application/json; charset=utf-8 X-Powered-By:Express

这是成功函数

params.success = function (response, textStatus, jqXHR) { console.log(jqXHR.getAllResponseHeaders()) }

这就是它的记录... 内容类型：application / json; charset = utf-8

This is what it logs... Content-Type: application/json; charset=utf-8

推荐答案

刚刚遇到了这个问题。这是因为您正在执行CORS请求，并且没有公开Location标头。

Just ran into this. It's because you're doing a CORS request and you're not exposing the Location header.

您需要添加 Access-Control-Expose -Headers 到Express中您的飞行前CORS响应：

You need to add a Access-Control-Expose-Headers to your preflight CORS response in Express:

res.header('Access-Control-Expose-Headers', 'Content-Type, Location'); res.send(200);

这将解决问题。