eager-peach

Keep request running

"Is there a way to keep a request running while the server is still processing it? For instance, suppose I have an endpoint to check if the server is still processing a request. It will return a 204 status code if it is still processing it. Is there a way to repeatedly hit the endpoint until I receive a 200 status code indicating that the processing has finished?"

let res = checkStatus.mutate()

while (res.status === 204) {
  await sleep(2000)
  res = checkStatus,mutate()
}

let res = checkStatus.mutate()

while (res.status === 204) {
  await sleep(2000)
  res = checkStatus,mutate()
}

8 Replies

eager-peachOP•3y ago

The code above works, I just feel like there is a better way to do it...

rising-crimson•3y ago

refetchInterval can accept a function so that you can poll until a certain criterion is met

eager-peachOP•3y ago

But how can I implement this after the mutation that triggers the server-side processing? To illustrate, in the aforementioned code, I was executing it within the onSuccess function of the mutation that triggers the server-side process. With refetchInterval, I need to use useQuery and limit its execution to after the mutation, just to check it's status

extended-salmon•3y ago

Do you have control of the backend? We do something similar to this but the mutation provides a jobId, and then you can query the state of the job from a different endpoint. That way it feels closer to what these endpoints should do. E.g. only calling mutation once to trigger the work, and a separate query to see how it's getting on (with refetchInteval as TkDodo said)

eager-peachOP•3y ago

Yes, I can do that, but can I use refetchInterval on a disabled query? I don't wan't it running automatically; I only want to utilize this query to display a loading status to the user and notify them when it's complete.

extended-salmon•3y ago

Yup, we only enable it when the jobId exists (so default is disabled) and then the refetchInterval only continues to poll while the returned data is e.g. not "success". When it's finished, the query goes back to disabled and polling stops

rising-crimson•3y ago

refetchInterval doesn't run on disabled queries, no, but you can enable it conditionally

eager-peachOP•3y ago

Got it! I think I can work with that, thanks guys! ❤️

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Keep request running

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