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Ignore only-if-cached cache mode on Mozilla Firefox prior to version 60 (#7503)

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This commit is contained in:
Akihiko Odaki 2018-05-16 03:14:30 +09:00 committed by Eugen Rochko
parent ff84c18e3d
commit 918cfd3be6
1 changed files with 10 additions and 5 deletions
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15
app/javascript/mastodon/service_worker/entry.js
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@ -13,6 +13,8 @@ function fetchRoot() {
return fetch('/', { credentials: 'include' });
}
const invalidOnlyIfCached = navigator.userAgent.match(/Firefox\/(\d+)/)[1] < 60;
// Cause a new version of a registered Service Worker to replace an existing one
// that is already installed, and replace the currently active worker on open pages.
self.addEventListener('install', function(event) {
@ -54,19 +56,22 @@ self.addEventListener('fetch', function(event) {
event.respondWith(openSystemCache().then(cache => {
return cache.match(event.request.url).then(cached => {
if (cached === undefined) {
return fetch(event.request).then(fetched => {
if (fetched.ok) {
const put = cache.put(event.request.url, fetched.clone());
const asyncResponse = invalidOnlyIfCached && event.request.cache === 'only-if-cached' ?
fetch(event.request, { cache: 'no-cache' }) : fetch(event.request);
return asyncResponse.then(response => {
if (response.ok) {
const put = cache.put(event.request.url, response.clone());
put.catch(() => freeStorage());
return put.then(() => {
freeStorage();
return fetched;
return response;
});
}
return fetched;
return response;
});
}