Serviceworker and cloudinary upload progress

[donv]

Hi!

I have a PWA and when I register a service worker with an event handler for the fetch event, all the Cloudinary upload progress events are missing. Doing a full refresh of the page enables the progress events for the current page, so does not registering an event handler for the fetch event.

My event handler should be pretty standard:

function onFetch(event) {
  event.respondWith(
    fetch(event.request).catch(function() {
      return caches.match(event.request).then(function(response) {
        if (response) { return response; }
        if (event.request.mode === 'navigate' ||
          (event.request.method === 'GET' && event.request.headers.get('accept').includes('text/html'))) {
          return caches.match('/offline.html');
        }
      })
    })
  );
}

self.addEventListener('fetch', onFetch);

Any idea what I am doing wrong? I get the same behaviour in the "Photo Album" Rails example app if I register a service worker..

[donv]

Hi!

I found an answer on StackOverflow: https://stackoverflow.com/a/54448464/658690 Disabling the fetch event handler for post requests did the trick:

function onFetch(event) {
    if (event.request.method === "POST") {
        return;
    }
    ...