Angular 2+ HttpErrorResponse没有为超时返回正确的状态

问题描述 投票:0回答:2

所以我使用httpClient.get()进行REST调用。我已经设置了API以返回504。

在查看Google devTools时,我可以看到调用已完成且状态为504.但是当我调试代码时,我得到的HttpErrorResponse状态为0。

我还设置了API以返回400响应,当我调试该代码时,响应状态为400.为什么400传播但504不传播?

我们正在使用Angular 6.0.6

angular angular-httpclient
2个回答
0
投票

更好的方法是实现错误处理程序。在我的例子中,我有一个公共类来进行HTTP调用,所有服务(例如:EmployeeService,SupplierService等)将与公共API通信以进行Rest API调用。下面是处理错误的示例代码。如果HTTP状态代码为404,您将看到以下内容。

服务器端错误 - 代码:404消息:http://localhost:5000/apiv1/account的Http失败响应:404 Not Found

这是我的Common Service的样子。

@Injectable({
  providedIn: 'root'
})

export class ApiService {

  getUrlvalue: string;
  constructor(private http: HttpClient) { }


  private formatErrors(error: any) {
    let errorMessage = '';
    if (error.error instanceof ErrorEvent) {
      errorMessage=`Client side Error: ${error.error.message}`;
    } else {
      errorMessage=`Server side Error - Code: ${error.status}\nMessage: ${error.message}`;
    }

    console.log(errorMessage);
    return throwError(error.error);
  }


  get(path: string, params: HttpParams = new HttpParams()): Observable<any> {
    //console.log(`${environment.api_url}${path}`);
    this.getUrlvalue = `${environment.api_url}${path}`;
    console.log('API service get request is making to : ' + this.getUrlvalue);

    return this.http.get(this.getUrlvalue, { params })    //, { params }
      .pipe(  
      catchError(this.formatErrors)
    
      );
  }

  put(path: string, body: Object = {}): Observable<any> {
    console.log(`${environment.api_url}${path}`);
    return this.http.put(
      `${environment.api_url}${path}`,
      JSON.stringify(body), httpHeaderOptions
    ).pipe(catchError(this.formatErrors));
  }

  post(path: string, body: Object = {}): Observable<any> {
    console.log(`${environment.api_url}${path}`);
    return this.http.post(
      `${environment.api_url}${path}`,
      JSON.stringify(body), httpHeaderOptions
    ).pipe(catchError(this.formatErrors));
  }

  delete(path): Observable<any> {
    console.log(`${environment.api_url}${path}`);
    return this.http.delete(
      `${environment.api_url}${path}`
    ).pipe(catchError(this.formatErrors));
  }

}

从其他服务链接AccountService这是如何调用简单的HTTP Get

@Injectable({
  providedIn: 'root'
})
export class AccountService {

  // private http: HttpClient
  constructor(private apiService: ApiService) { }

  getAccounts(): Observable<Deal[]> {

    return this.apiService.get('/account')
      .pipe(
        tap(deals => console.log('fetched Accounts 111111')),
        catchError(this.handleError('getAccounts', []))
      );
  }

0
投票

原来我们的API网关没有正确设置,我们没有返回正确的标头。

'Access-Control-Allow-Methods': 'POST,GET,OPTIONS',
'Access-Control-Allow-Origin': '*', 
'Access-Control-Allow-Headers': 'Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token',
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