使用拦截器对angular 6中授权请求的错误处理

import { Injectable } from '@angular/core';
import { HttpInterceptor, HttpRequest, HttpHandler, HttpEvent, HttpResponse, HttpErrorResponse } from '@angular/common/http';
import { Observable, throwError } from 'rxjs';
import { catchError } from 'rxjs/operators';

@Injectable()
export class AuthInterceptor implements HttpInterceptor {
  intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    // 在请求中添加授权信息
    const modifiedRequest = request.clone({
      headers: request.headers.set('Authorization', 'Bearer your_token_here')
    });

    return next.handle(modifiedRequest).pipe(
      catchError((error: HttpErrorResponse) => {
        // 处理授权请求的错误
        if (error.status === 401) {
          // 进行相应的处理，比如跳转到登录页面
        }

        return throwError(error);
      })
    );
  }
}

import { NgModule } from '@angular/core';
import { HttpClientModule, HTTP_INTERCEPTORS } from '@angular/common/http';
import { AuthInterceptor } from './auth.interceptor';

@NgModule({
  imports: [
    HttpClientModule
  ],
  providers: [
    {
      provide: HTTP_INTERCEPTORS,
      useClass: AuthInterceptor,
      multi: true
    }
  ]
})
export class AppModule { }