ExtJS的4.2.1：无法检索时Ext.ajax.request回调HTTP响应头 [英] ExtJS 4.2.1: Cannot retrieve HTTP Response headers upon Ext.ajax.request callback

问题描述

我想读经Ext.ajax.request未来响应的头。

I'm trying to read the headers of the coming response upon Ext.ajax.request.

这是code：

Ext.Ajax.request({ url: 'http://localhost:3000/v0.1/login' ,
    method: 'POST',
    scope:this,
    jsonData: {"_username":username,"_userpwd":password},
    success: function(responseObject){
        var headers = responseObject.getAllResponseHeaders();
        console.info(headers );
        Ext.destroy(Ext.ComponentQuery.query('#loginWindow'));
        this.application.getController('SiteViewController').showView();
    },
    failure: function(responseObject){
        alert(responseObject.status);
    }
    });

但是，它印在控制台中唯一的标题是：

But the only header that it is printed out in console is:

Object {content-type: "application/json; charset=utf-8"} 

所有其它头被丢失，但他们是present在Chrome检查！

All the other headers are missing, but they are present in the chrome inspector!!!

我在想什么？谢谢

推荐答案

由于你可能做一个跨域请求，你只会有头由服务器明确地暴露出来。同样域的请求揭露所有的标题。

Because you're probably doing a cross-domain request, you will only have headers explicitly exposed by the server. Same domain requests expose all the headers.

在服务器端，您要添加的头访问控制 - 暴露 - 头你要揭露头，由昏迷分开的完整清单。在PHP中是这样的：

On the server side you have to add the header "Access-Control-Expose-Headers" with the exhaustive list of headers you want to expose, separated by a coma. In php it would look like this:

header("Access-Control-Expose-Headers: Content-length, X-My-Own-Header");

标头将通过 responseObject.getAllResponseHeaders（）或类似 responseObject.getResponseHeader（'内涵式'）。

有关跨域请求和头的详细信息： http://www.html5rocks.com / EN /教程/ CORS /

More information about cross-domain requests and headers: http://www.html5rocks.com/en/tutorials/cors/

PS：Ace.Yin有正确的答案，但我没有足够的声誉简评

PS: Ace.Yin had the right answer, but I don't have enough reputation to simply comment.

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