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Angular 2 retry on error

An approach could be to extend the HTTP object to intercept errors:. You can compose the handling of 429 errors into the errors observable that' s passed to retryWhen. The errors that are emitted from the errors observable will contain a status property if they are errors that were received your. getCompanies( ) call right after the. retryWhen( ( errors) = > { return errors. scan( ( errorCount, err) = > errorCount + 1, 0). takeWhile( ( errorCount) = > errorCount < 2) ; } ) ;. In this example, this post I will show how to retry http requests using RxJs. My first introduction to RxJs was through Angular' s http implementation. Not only can I delay retries, I can also filter them down to specific error scenarios. I used the scan operator: return this. get( url, options). retryWhen( errors = > errors. scan( ( acc, source, index) = > { if( index) throw source; } ) ).

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  • Video:Retry angular error

    Angular error retry

    catch( ( res) = > this. handleError( res) ) ;. The parameters of scan( ) : acc : an. implement an Observable. Interval to make your http request every 5s. have a look at this thread : Angular2 http at an interval. If the request fails it will be retried and only after all the retry attempts fail the stream throws an error. import { Http } from import { Injectable } from import { Observable } from ' rxjs/ Rx' ; export class. Basic error handling works fine. Sometimes for a 401 exception, I want to get new Auth token and retry the same request with updated Auth token. What I am thinking is to introduce array of error interceptor.

    One of the error. If you want to error the whole observable after 10 attempts, the observable returned by the retryWhen callback. return val; } else if( val > 0 & & val % 2 = = = 0) { errorFixed = true; throw { error : ' error' } ; } else { return val; } } ). A little late to the party but, I recently implemented a similar behaviour. Here is my solution: post< T> ( serviceUrl: string, data: any) : Observable< T> { return Observable. defer( ( ) = > { return super. post< T> ( serviceUrl, data) ; } ).