Angular 新的头不会与拦截器一起添加
我想在Angular 8应用程序中向所有HttpClient添加头。这是我的拦截器:Angular 新的头不会与拦截器一起添加,angular,httpclient,angular-http-interceptors,Angular,Httpclient,Angular Http Interceptors,我想在Angular 8应用程序中向所有HttpClient添加头。这是我的拦截器: import { Injectable } from '@angular/core'; import { HttpEvent, HttpInterceptor, HttpHandler, HttpRequest, HttpHeaders } from '@angular/common/http'; import { Observable } from 'rxjs'; @Injectable() export
import { Injectable } from '@angular/core';
import { HttpEvent, HttpInterceptor, HttpHandler, HttpRequest, HttpHeaders } from '@angular/common/http';
import { Observable } from 'rxjs';
@Injectable()
export class Interceptor implements HttpInterceptor {
constructor(private toaster: ToastrService) {}
intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
alert('Interceptor!');
// Set headers
const headers = req.headers;
// Set this header for security
headers.set('test', 'value');
const authReq = req.clone({ headers });
return next.handle(authReq);
}
}
从'@angular/core'导入{Injectable};
从'@angular/common/http'导入{HttpEvent,HttpInterceptor,HttpHandler,HttpRequest,HttpHeaders};
从“rxjs”导入{Observable};
@可注射()
导出类拦截器实现HttpInterceptor{
构造函数(专用烤面包机:ToastrService){}
截取(req:HttpRequest,next:HttpHandler):可观察{
警报(‘拦截器’);
//设置标题
const headers=req.headers;
//为安全设置此标题
headers.set('test','value');
const authReq=req.clone({headers});
返回next.handle(authReq);
}
}
警报已执行,但测试标题未添加到请求中。来自官方文档: 您不能直接修改上一页中的现有标题 选项对象,因为HttpHeaders类的实例是 不变的 请改用set()方法。它返回当前文件的克隆 应用了新更改的实例 您需要克隆请求并在那里设置头
const newReq = req.clone({ headers: req.headers.set('test', 'value') });
return next.handle(newReq);
从官方文件: 您不能直接修改上一页中的现有标题 选项对象,因为HttpHeaders类的实例是 不变的 请改用set()方法。它返回当前文件的克隆 应用了新更改的实例 您需要克隆请求并在那里设置头
const newReq = req.clone({ headers: req.headers.set('test', 'value') });
return next.handle(newReq);
给你
1) 您可以通过以下方式使用现有的和添加新的,并且可以放置在某个实用程序中,以便对所有拦截请求进行重用
2) 根据您的要求,使用新标题或旧标题覆盖标题
setRequestHeaders(req: HttpRequest<any>): HttpHeaders {
const headerSettings: { [name: string]: string | string[]; } = {};
// GET ALL EXISTING HEADERS
for (const key of req.headers.keys()) {
headerSettings[key] = req.headers.getAll(key);
}
// ADD NEW HEADERS
headerSettings[COMMON_CONSTANTS.HEADERS.AUTHORIZATION] =
: 'Bearer some-random-token';
headerSettings[COMMON_CONSTANTS.HEADERS.CACHE_CONTROL] = 'max-age=0, no-cache, must-revalidate, proxy-revalidate';
return new HttpHeaders(headerSettings);
}
给你
1) 您可以通过以下方式使用现有的和添加新的,并且可以放置在某个实用程序中,以便对所有拦截请求进行重用
2) 根据您的要求,使用新标题或旧标题覆盖标题
setRequestHeaders(req: HttpRequest<any>): HttpHeaders {
const headerSettings: { [name: string]: string | string[]; } = {};
// GET ALL EXISTING HEADERS
for (const key of req.headers.keys()) {
headerSettings[key] = req.headers.getAll(key);
}
// ADD NEW HEADERS
headerSettings[COMMON_CONSTANTS.HEADERS.AUTHORIZATION] =
: 'Bearer some-random-token';
headerSettings[COMMON_CONSTANTS.HEADERS.CACHE_CONTROL] = 'max-age=0, no-cache, must-revalidate, proxy-revalidate';
return new HttpHeaders(headerSettings);
}