@angular/cli项目构建--interceptor

JWTInterceptor

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

@Injectable()
export class JWTInterceptor implements HttpInterceptor {

  constructor() {
  }
  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    req = req.clone({
      setHeaders: {Authorization: 'Token Token_admin_id'}
    });
    return next.handle(req);
  }
}

ResponseInterceptor

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

@Injectable()
export class ResponseInterceptor implements HttpInterceptor {

  constructor() {
  }

  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {

    return next.handle(req).map(event => {
      if (event instanceof HttpResponse) {
        switch (event.status) {
          case 401:
            // expired jwt go to login
            break;
          case 404:
            // not found
            break;
          case 403:
            // forbidden
            break;
          case 500:
            // service inner error
            break;
          default:
            console.log('data return successfully!');
        }
      }
      return event;
    });
  }
}

引入：

import {HttpClientModule, HTTP_INTERCEPTORS} from '@angular/common/http';

providers: [
    {provide: HTTP_INTERCEPTORS, useClass: JWTInterceptor, multi: true},
    {provide: HTTP_INTERCEPTORS, useClass: ResponseInterceptor, multi: true}],