如何,我想全局处理http错误(特别是状态401).我知道我可以做那样的事
getCompanies() {
return this.http.get('https://angular2.apispark.net/v1/companies/')
.map(res => res.json())
.catch(res => {
return Observable.throw(res.json());
});
如何在其他组件上获得此错误？
一种方法可以是扩展HTTP对象以拦截错误：
@Injectable()
export class CustomHttp extends Http {
constructor(backend: ConnectionBackend,defaultOptions: RequestOptions) {
super(backend,defaultOptions);
}
request(url: string | Request,options?: RequestOptionsArgs): Observable<Response> {
console.log('request...');
return super.request(url,options).catch(res => {
// do something
});
}
get(url: string,options?: RequestOptionsArgs): Observable<Response> {
console.log('get...');
return super.get(url,options).catch(res => {
// do something
});
}
}
并按如下所述进行注册：
bootstrap(AppComponent,[HTTP_PROVIDERS,new Provider(Http,{
useFactory: (backend: XHRBackend,defaultOptions: RequestOptions) => new CustomHttp(backend,defaultOptions),deps: [XHRBackend,RequestOptions]
})
]);
