mastofe

entry.js (2612B)

import { freeStorage } from '../storage/modifier';
import './web_push_notifications';
function openSystemCache() {
  return caches.open('mastodon-system');
}
function openWebCache() {
  return caches.open('mastodon-web');
}
function fetchRoot() {
  return fetch('/web', { credentials: 'include' });
}
// 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) {
  event.waitUntil(Promise.all([openWebCache(), fetchRoot()]).then(([cache, root]) => cache.put('/web', root)));
});
self.addEventListener('activate', function(event) {
  event.waitUntil(self.clients.claim());
});
self.addEventListener('fetch', function(event) {
  const url = new URL(event.request.url);
  if (url.pathname.startsWith('/web')) {
    // we always make /web/login go through
    if (url.pathname.startsWith('/web/login')) {
      return;
    }
    const asyncResponse = fetchRoot();
    const asyncCache = openWebCache();
    event.respondWith(asyncResponse.then(async response => {
      // response was redirected - let's actually do the request from the event
      // and return its response
      if (response.redirected || response.type === 'opaqueredirect') {
        return await fetch(event.request);
      }
      if (response.ok) {
        const cache = await asyncCache;
        await cache.put('/web', response);
        return response.clone();
      }
      throw null;
    }).catch(() => asyncCache.then(cache => cache.match('/web'))));
  } else if (url.pathname === '/auth/sign_out') {
    const asyncResponse = fetch(event.request);
    const asyncCache = openWebCache();
    event.respondWith(asyncResponse.then(async response => {
      if (response.ok || response.type === 'opaqueredirect') {
        await Promise.all([
          asyncCache.then(cache => cache.delete('/web')),
          indexedDB.deleteDatabase('mastodon'),
        ]);
      }
      return response;
    }));
  } else if (process.env.CDN_HOST ? url.host === process.env.CDN_HOST : url.pathname.startsWith('/system/')) {
    event.respondWith(openSystemCache().then(async cache => {
      const cached = await cache.match(event.request.url);
      if (cached === undefined) {
        const fetched = await fetch(event.request);
        if (fetched.ok) {
          try {
            await cache.put(event.request.url, fetched.clone());
          } finally {
            freeStorage();
          }
        }
        return fetched;
      }
      return cached;
    }));
  }
});