Hiular for Angular,我遇到了获取HTTP状态代码的问题,在HTTP模块中我可以使用 response.status 轻松获取响应代码,但是当我使用HttpClient
时模块我无法获得response.status,它显示无法找到状态。
那么,如何在HttpClient
中使用Angular 4&5
模块获取response.status。请帮忙。
@Injectable()
export class RestProvider {
private apiUrl = 'https://restcountries.eu/rest/v2/al';
constructor(public http: HttpClient) {
console.log('Hello RestProvider Provider');
}
getCountries(): Observable<{}> {
return this.http.get(this.apiUrl).pipe(
map(this.extractData),
catchError(this.handleError)
);
}
private extractData(res: Response) {
let body = res;
return body || { };
}
private handleError (error: Response | any) {
let errMsg: string;
if (error instanceof Response) {
const err = error || '';
errMsg = `${error.status} - ${error.statusText || ''} ${err}`;
} else {
errMsg = error.message ? error.message : error.toString();
}
console.error(errMsg);
return Observable.throw(errMsg);
}
}
export class HomePage {
responseStatus: number;
countries: any;
errorMessage: string;
constructor(public navCtrl: NavController, public navParams: NavParams, public rest: RestProvider) {
}
ionViewDidLoad() {
this.getCountries();
}
getCountries() {
this.rest.getCountries().subscribe(res =>{
this.countries=res;
console("status code--->"+res.status)
},
err=>{
console("status code--->"+err.status)
})
}
}
答案 0 :(得分:0)
要获得完整的回复,您需要为响应添加额外的属性,observe
就像这样 -
getCountries(): Observable<{}> {
return this.http.get(this.apiUrl, {observe: 'response'}).pipe(
map(this.extractData),
catchError(this.handleError)
);
}
有关详细信息,请参阅 -
答案 1 :(得分:0)
http.get方法的标题选项中添加观察:“响应”
getCountries(): Observable<{}> {
return this.http.get(this.apiUrl,{observe : 'response'}).pipe(
map(this.extractData),
catchError(this.handleError)
);
}
并订阅get()方法以获取响应状态,就像您在首页中想要的那样
getCountries() {
this.rest.getCountries().subscribe(
res => { this.countries=res;
console("status code--->"+res.status)
},
err=>{
console("status code--->"+err.status)
})
},
答案 2 :(得分:0)
您可以使用Angular's interceptor在一个地方捕获所有错误并保持服务整洁。创建一个名为“错误拦截器”的新拦截器,并添加拦截方法:
intercept(request, next) {
// Handle response
return next.handle(request).pipe(
catchError(error => {
//handle specific errors
if (error.status === 401) {
this.handle401();
}
//default case: print, log, toast, etc...
return throwError(error.message || error);
})
);
}