一個方向是,通過實施API客戶端類。這個API客戶端封裝了原始的Http服務。
的想法是,既然HTTP服務產生可觀你可以很容易地通過增加運營商如map
,flatMap
和catch
運營商由HTTP服務所產生的原始觀測的延長它的行爲。
我想你會發現這個例子是解決你遇到的問題的一個有用的起點。
import { ApiRequestOptions } from './api-request-options.service';
import { Http, Response, RequestOptions, ResponseContentType } from '@angular/http';
import 'rxjs/add/observable/zip';
import 'rxjs/add/operator/map';
import { Observable } from 'rxjs/Rx';
import { Injectable } from '@angular/core';
import { Router } from '@angular/router';
@Injectable()
export class ApiClient {
// PLease note, the API request options service is a helper that we introduced
// to generate absolute URLs based on settings in the client.
// I did not include it here for brevity.
constructor(private router: Router, private http: Http, private requestOptions: ApiRequestOptions) {
}
get<TResponse>(path: string, queryStringParams?: any): Observable<TResponse> {
let self = this;
return Observable.zip(
this.requestOptions.absoluteUrlFor(path, queryStringParams),
this.requestOptions.authorizedRequestOptions()
).flatMap(requestOpts => {
let [url, options] = requestOpts;
return self.http.get(url, options);
}).catch(response => {
if (response.status === 401) {
self.router.navigate(['/login']);
}
return response;
}).map((response: Response) => <TResponse>response.json());
}
post<TResponse>(path: string, body: any): Observable<TResponse> {
let self = this;
return Observable.zip(
this.requestOptions.absoluteUrlFor(path),
this.requestOptions.authorizedRequestOptions()
).flatMap(requestOpts => {
let [url, options] = requestOpts;
return self.http.post(url, body, options);
}).catch(response => {
if (response.status === 401) {
self.router.navigate(['/login']);
}
return response;
}).map((response: Response) => <TResponse>response.json());
}
put<TResponse>(path: string, body: any): Observable<TResponse> {
let self = this;
return Observable.zip(
this.requestOptions.absoluteUrlFor(path),
this.requestOptions.authorizedRequestOptions()
).flatMap(requestOpts => {
let [url, options] = requestOpts;
return self.http.put(url, body, options);
}).catch(response => {
if (response.status === 401) {
self.router.navigate(['/login']);
}
return response;
}).map((response: Response) => {
if (response.status === 200) {
return <TResponse>response.json();
} else {
return null;
}
});
}
delete(path: string): Observable<Response> {
let self = this;
return Observable.zip(
this.requestOptions.absoluteUrlFor(path),
this.requestOptions.authorizedRequestOptions()
).flatMap(requestOpts => {
let [url, options] = requestOpts;
return self.http.delete(url, options);
}).catch(response => {
if (response.status === 401) {
self.router.navigate(['/login']);
}
return response;
});
}
}
見http://stackoverflow.com/questions/36599523/angular-2-route-to-404-page-when-route-param-is-invalid/36609006#36609006 –
@GünterZöchbauer它不」 t回答關於在服務中使用路由器的問題 – Viktor
不知道爲什麼。如果你注入路由器的構造函數(private http:Http,private router:Router){}'你應該可以使用它。另請參閱問題下方的鏈接。 –