Skip to content

Instantly share code, notes, and snippets.

@wKoza wKoza/rewrite.handler.ts
Last active Oct 1, 2018

What would you like to do?
import {InjectionToken, Injector} from '@angular/core';
import {HttpBackend, HttpEvent, HttpInterceptor, HttpReques, HttpHandler, HttpRequest} from '@angular/common/http';
import { Observable } from 'rxjs';
* `HttpHandler` which applies an `HttpInterceptor` to an `HttpRequest`.
export class MyHttpInterceptorHandler implements HttpHandler {
constructor(private next: HttpHandler, private interceptor: HttpInterceptor) {}
handle(req: HttpRequest<any>): Observable<HttpEvent<any>> {
return this.interceptor.intercept(req,;
export class MyHandlerService implements HttpHandler {
private chain: HttpHandler | null = null;
constructor(private backend: HttpBackend, private injector: Injector, private interceptors: InjectionToken<HttpInterceptor[]>) { }
handle(req: HttpRequest<any>): Observable<HttpEvent<any>> {
if (this.chain === null) {
const interceptors = this.injector.get(this.interceptors, []);
this.chain = interceptors.reduceRight(
(next, interceptor) => new MyHttpInterceptorHandler(next, interceptor), this.backend);
return this.chain.handle(req);
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.