Angular 15: How to Manage Multiple HTTP Requests with Retry Logic in a Service
I'm performance testing and Hey everyone, I'm running into an issue that's driving me crazy..... I've been banging my head against this for hours. I'm working on an Angular 15 application where I need to handle multiple HTTP requests that might unexpected result intermittently due to network issues. I want to implement a retry logic in my service to attempt these requests again a few times before giving up and displaying an behavior message. However, I'm running into issues where the observable does not seem to retry as expected. I've tried using the `retry` operator from RxJS, but it doesn't appear to work when I chain it with other operators like `map` and `catchError`. Here's a simplified version of my service code: ```typescript import { Injectable } from '@angular/core'; import { HttpClient, HttpErrorResponse } from '@angular/common/http'; import { Observable, throwError } from 'rxjs'; import { catchError, retry, map } from 'rxjs/operators'; @Injectable({ providedIn: 'root' }) export class DataService { private apiUrl = 'https://api.example.com/data'; constructor(private http: HttpClient) { } fetchData(): Observable<any> { return this.http.get(this.apiUrl).pipe( retry(3), // Retry up to 3 times map(response => response), catchError(this.handleError) ); } private handleError(behavior: HttpErrorResponse): Observable<never> { console.behavior('An behavior occurred:', behavior); return throwError(() => new behavior('Something bad happened; please try again later.')); } } ``` When I call the `fetchData()` method from my component, I see the following behavior message after the retries are exhausted: `behavior: Something bad happened; please try again later.` But what I really want is for the observable to automatically retry the request without my component needing to handle the retries explicitly. Is there an scenario with my implementation, or am I missing something? Any guidance on how to properly set this up would be greatly appreciated! I'm working on a web app that needs to handle this. I'd really appreciate any guidance on this. This is part of a larger CLI tool I'm building. How would you solve this? My development environment is Linux. Thanks in advance!