如何使用angular4中的响应头发送“X-CSRF-TOKEN”

我目前正在开发一个Angular4应用程序 . 现在我想实现XSRF保护 . 在Response头cookie中，我收到"XSRF-TOKEN"，我需要在下一个Request头cookie中发送"X-XSRF-TOKEN" . 如official Angular document中所述，Angular正在处理这个问题 . 但就我而言，棱角分明没有处理它 . 所以我创建了以下自定义XsrfInterceptor来附加"X-XSRF-TOKEN"和响应头 .

import { NgModule, Injectable } from '@angular/core';
import { Observable } from "rxjs/Observable";
import { HttpRequest, HttpHandler, HttpEvent, HttpXsrfTokenExtractor, HttpInterceptor } from "@angular/common/http";

@Injectable()
export class XsrfInterceptor implements HttpInterceptor {

    constructor(private tokenExtractor: HttpXsrfTokenExtractor) {
    }

    intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
        const headerName = 'X-XSRF-TOKEN';
        console.log("xsrf intercepter called");
        let requestToForward = req;
        let token = this.tokenExtractor.getToken() as string;
        console.log(token);
        if (token !== null) {
            requestToForward = req.clone({ setHeaders: {headerName: token } });
        }
        return next.handle(requestToForward);
    }
}

在我的主要模块中，我将其包含在提供者中，

providers: [
    LoginService,
    AuthGuardLogin,
    { provide: HTTP_INTERCEPTORS, useClass: XsrfInterceptor,  multi: true }      
],

但不幸的是它没有用 . 我认为我的aopplication不是调用自定义Intercepter的拦截方法（它不是打印console.log（'xsrf intercepter called'）） .

我的http Headers 如下：

let httpHeader = new RequestOptions({
            headers: new Headers({
                'Content-Type': 'application/json',
                'x-auth-token': this.authToken
            })
        })

在回复 Headers 中：

Access-Control-Allow-Credentials:true
Access-Control-Allow-Headers:Access-Control-Allow-Origin, Access-Control-Allow-Headers, Accept, X-XSRF-TOKEN, XSRF-TOKEN, X-Requested-By, Content-Type, Origin, Authorization, X-Requested-With, x-auth-token, OPTIONS
Access-Control-Allow-Methods:POST, GET, PUT, OPTIONS
Access-Control-Allow-Origin:http://localhost:7070
Access-Control-Expose-Headers:x-auth-token, XSRF-TOKEN, X-XSRF-TOKEN
Access-Control-Max-Age:3600
Cache-Control:no-cache, no-store, max-age=0, must-revalidate
Date:Fri, 24 Nov 2017 06:42:20 GMT
Expires:0
Pragma:no-cache
Referrer-Policy:same-origin
Set-Cookie:XSRF-TOKEN=63f66e2a-1ad0-4641-8f36-27c16734a676;path=/mfleet;HttpOnly
Transfer-Encoding:chunked
x-auth-token:8d06b1da-c35b-42ea-ac28-eae51f3dd74d
X-Content-Type-Options:nosniff
X-Frame-Options:DENY
X-XSS-Protection:1; mode=block

下一个请求 Headers ：

Accept:application/json, text/plain, */*
Accept-Encoding:gzip, deflate, br
Accept-Language:en-US,en;q=0.9
Connection:keep-alive
Content-Type:application/json
Cookie:XSRF-TOKEN=63f66e2a-1ad0-4641-8f36-27c16734a676  **//this should be X-XSRF-TOKEN**
Host:localhost:7070
Referer:http://localhost:7070/dist/
User-Agent:Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36
x-auth-token:8d06b1da-c35b-42ea-ac28-eae51f3dd74d

我正在使用以下版本的角度库：

"@angular/animations": "^4.4.5",
    "@angular/cdk": "^2.0.0-beta.8",
    "@angular/common": "^4.0.0",
    "@angular/compiler": "^4.0.0",
    "@angular/core": "^4.0.0",
    "@angular/forms": "^4.0.0",
    "@angular/http": "4.0.0",
    "@angular/material": "^2.0.0-beta.8",
    "@angular/platform-browser": "^4.0.0",
    "@angular/platform-browser-dynamic": "^4.0.0",
    "@angular/router": "^4.0.0",