[英]How do I get a set “this” to a variable in a component in angular2 typescript?
[英]How do I set global timeout for GET requests on angular2
我的應用使用angular2 http,現在我必須為所有請求設置超時。 對於單個請求,我正在這樣做:
this.http.get(this.endPoint)
.timeout(10000, new Error('timeout'))
.map( res => res.json());
如何為我的應用程序擁有的所有內容抽象這些?
我通過創建擴展Http類解決了這一問題。 我不確定HttpService是否是最好的名稱,但是它對我有用。
import { Injectable } from '@angular/core';
import 'rxjs/add/operator/map';
import { Observable } from 'rxjs/Observable';
import {Http, XHRBackend, RequestOptions, Request, RequestOptionsArgs, Response} from '@angular/http';
@Injectable()
export class HttpService extends Http{
constructor (backend: XHRBackend, options: RequestOptions) {
super(backend, options);
}
request(url: string|Request, options?: RequestOptionsArgs): Observable<Response> {
return super.request(url, options).timeout(5000, new Error('timeout'));
}
}
我還必須將HttpService聲明為提供程序,並在app.module.ts上為此創建一個工廠
providers: [
{provide: ErrorHandler, useClass: IonicErrorHandler},
{provide: HttpService,useFactory: (backend: XHRBackend, options: RequestOptions) => {
return new HttpService(backend, options);
}, deps: [XHRBackend, RequestOptions] },
{provide: AuthHttp, useFactory: getAuthHttp, deps: [HttpService]},
]
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