详解使用angular的HttpClient搭配rxjs

import { HttpModule } from '@angular/http';
@NgModule({
 import: [ HttpModule ]
 // ...
})
AppModule {}

import { Http } from '@angular/http';
// ...
constructor(
 private http: Http
) {}
ngOnInit() {
 this.http.get(`url`).subscribe((res) => {
// 成功回调
 }, (err) => {
// 失败回调
 });
}
// ...

import { Http, Header } from '@angular/http';
// ...
this.http.delete(`url`, {headers: new Header(), body: { } }).subscribe(...);
// ...

import { HttpClientModule } from '@angular/common/http';
// ...
@NgModule({
 import: [ HttpClientModule ]
})
// ...

import { HttpClient } from '@angular/common/http';
// ...
constructor(
 private http: HttpClient
) {}
// ...
this.http.get('url').subscribe((res) => {
 // 成功回调
}, (err) => {
 // 失败回调
});
// ...

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

@Injectable()
export class MyInterceptor implements HttpInterceptor {
 intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
 return next.handle(req);
 }
}

import {NgModule} from '@angular/core';
import {HTTP_INTERCEPTORS} from '@angular/common/http';

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

public intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
 let authInfo = {token: 'testtoken', admin: 'testadmin'};
 const authReq = req.clone({
  headers: req.headers
  .set('Authorization', authInfo.token || '')
  .set('Admin', authInfo.admin || '')
  .set('Content-Type', 'application/json;charset=UTF-8')
 });
 return next.handle(authReq);
}

someReq().subscribe((res) => {
 if (res.state) {
 // 真正成功
 } else {
 // 还是失败
 }
}, (err) => {
 // 失败
});

return next.handle(authReq).map((event) => {
 if (event instanceof HttpResponse) {
 switch (event.status) {
  case 200:
  if (event.body['state']) {
  let newEvent = event.clone({body: event.body['data']});
  return newEvent;
  } else {
  throw event.body['msg'];
  }
  case 401:
  this.storage.remove('auth_token');
  this.router.navigate(['/login']);
  default:
  throw `【${event.status}】【${event.statusText}】`;
 }
 }
 return event;
});