我正嘗試使用新的HttpClientModule
來處理從我的.NET Core WebApi從Angular 4.3服務返回的錯誤。Angular 4.3 HttpClient:捕獲webapi錯誤響應正文
我正在做的http請求如下:
postUser(model: IPostUser): Observable<IUser> {
return this.http.post<IUser>(this.originUrl + '/api/registry', model)
.catch((reason: any) => this.handleError(reason));
}
的handleError
方法是:
private handleError(error: HttpErrorResponse | any): ErrorObservable {
// in a real world app, we might use a remote logging infrastructure
let errStatus: string;
let errMsg: string;
if (error instanceof HttpErrorResponse) {
try {
const body: any = error.error || error;
const err: string = body.message || JSON.stringify(body);
errStatus = `${error.status} - ${error.statusText || ''}`;
errMsg = `${err}`;
if (error.status === 0) {
errMsg = 'Si é verificato un errore. Si prega di riprovare più tardi.';
} else if (error.status === HttpStatusCodes.UNAUTHORIZED || error.status === HttpStatusCodes.FORBIDDEN) {
errMsg = 'Non hai effettuato l\'accesso.';
}
} catch (ex) {
errMsg = 'Si é verificato un errore. Si prega di riprovare più tardi.';
}
} else {
errMsg = error.message ? error.message : error.toString();
}
console.error(errStatus + ': ' + errMsg);
this.toastrService.error(errMsg, 'Errore');
return Observable.throw(errMsg);
}
而的WebAPI控制器動作進行以下的安全檢查:
var user = await _userManager.FindByIdAsync(model.Id);
if (user == null)
return NotFound("Utente non trovato.");
if ((await _userManager.FindByNameAsync(model.UserName)) != null)
return BadRequest("Esite già un utente con questo Username.");
else if ((await _userManager.FindByEmailAsync(model.Email)) != null)
return BadRequest("Esite già un utente con questa Email.");
else if ((await _userManager.Users.SingleOrDefaultAsync(u => u.TaxCode == model.TaxCode)) != null)
return BadRequest("Esite già un utente con questo Codice Fiscale.");
因此,根據用戶嘗試發佈到服務器的情況,服務器會拋出一個NotFound o r BadRequest使用包含消息的對象的主體來進行呼叫。
一個壞的調用到的WebAPI行動造成此錯誤:
undefined: You provided 'undefined' where a stream was expected. You can provide an Observable, Promise, Array, or Iterable.
我試圖使用HttpInterceptor捕獲錯誤響應正文:
@Injectable()
export class ErrorInterceptor implements HttpInterceptor {
constructor(private router: Router) { }
intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
return next.handle(req).do((event: HttpEvent<any>) => {
if (event instanceof HttpResponse) {
// do stuff with response if you want
}
}).catch((error: any) => {
if (error instanceof HttpErrorResponse) {
let x = error;
if (error.status === HttpStatusCodes.BAD_REQUEST || error.status === HttpStatusCodes.NOT_FOUND) {
return Observable.throw(error);
}
}
})
}
}
但是,對於攔截器,在調用post
之後錯誤仍然與catch
方法相同在Angular服務中調用上面顯示的TypeError
異常而不是我的自定義錯誤對象。
任何解決方案?如何從服務器捕獲BadRequest/NotFound錯誤響應並正確獲取錯誤響應正文?
謝謝大家提前!