如何在角度2中获得自定义响应标头？ [英] How to get custom response header in angular 2?

问题描述

我是角色2的新手，目前正在使用角度2.2.1，我已成功发布请求并获得成功响应但是当我尝试从响应获取授权标头时我总是得到null我是否能够获得 Content-Type 标头。以下是我到目前为止的解决方案。

I am new to angular 2 and currently working with angular 2.2.1 in which I am successfully able to post request and get success response however when I try to get Authorization header from response I always get null whether I am able to get Content-Type header. Below is my solution so far.

service.ts登录方式：

login(model: LoginModel) {
        let requestUrl = '/someurl';
        let requestPayload = JSON.stringify(model);
        let headers = this.getHeaders(false); // ... Set all required headers       

        let options = new RequestOptions({ headers: headers }); // Create a request option

        return this.http.post(requestUrl, requestPayload, options) // ...using post request
            //.map((res: Response)) // ...and calling .json() on the response to return data
            .subscribe((res: Response) => {
                var payload = res.json();
                var authorization = res.headers.get('Authorization');
                var contentType = res.headers.get('Content-Type');                                
                console.log(payload, contentType, authorization)
            });            
    }

Header Helper

getHeaders(isSecureAPI: boolean) {
        let headers = new Headers({ 'Content-Type': 'application/json', 'Accept': 'application/json' });
        if (isSecureAPI) {
            headers.append('Authorization', 'GetFromSession');
            headers.append('X-UserID', 'GetFromSession');
        }
        return headers;
    }

Fiddler track：

角度控制台输出
< a href =https://i.stack.imgur.com/V68k3.png =noreferrer>

所以任何人都可以指导我可能做错的事情吗？

So anyone can guide me what I am possibly doing wrong?

推荐答案

允许标题，但不在CORS服务器上公开，但添加 headers.add（Access-Control-Expose-Headers，Authorization，X-Custom）; 在服务器上完成了这项工作：）

Header was allowed but not exposed on CORS server however adding headers.add("Access-Control-Expose-Headers", "Authorization, X-Custom"); on server did the job :)

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