Angular2 observable http get conditional repeat

Question

Angular2 observable http get conditional repeat

I am using angular2 observable pattern to make http requests. I am trying to conditionally retry http get: I want to execute http get until the condition is met:

http.get('url')
.map(res => {
     // if the condition is met I should repeat the http get request
})
.subscribe()

Is there a way to conditionally repeat the http get request?

Thanks, Marco

+3

http angular get observable rxjs

Marco Antelmi 05 jul. 17 at 18:14

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1 answer

AhmedRiyad · Accepted Answer · 2017-07-05T21:50:11+0000

You can use expand . Here's an example:

let request$ = http.get('url');

request$.expand(value => {
  return value !== 0 ? request$ : Rx.Observable.empty()
})
.map(res => {
  //Do mapping here
})
.subscribe()

Angular2 observable http get conditional repeat

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