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-rw-r--r--webui/src/registerServiceWorker.js117
1 files changed, 0 insertions, 117 deletions
diff --git a/webui/src/registerServiceWorker.js b/webui/src/registerServiceWorker.js
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-// In production, we register a service worker to serve assets from local cache.
-
-// This lets the app load faster on subsequent visits in production, and gives
-// it offline capabilities. However, it also means that developers (and users)
-// will only see deployed updates on the "N+1" visit to a page, since previously
-// cached resources are updated in the background.
-
-// To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
-// This link also includes instructions on opting out of this behavior.
-
-const isLocalhost = Boolean(
- window.location.hostname === 'localhost' ||
- // [::1] is the IPv6 localhost address.
- window.location.hostname === '[::1]' ||
- // 127.0.0.1/8 is considered localhost for IPv4.
- window.location.hostname.match(
- /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
- )
-);
-
-export default function register() {
- if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
- // The URL constructor is available in all browsers that support SW.
- const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
- if (publicUrl.origin !== window.location.origin) {
- // Our service worker won't work if PUBLIC_URL is on a different origin
- // from what our page is served on. This might happen if a CDN is used to
- // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
- return;
- }
-
- window.addEventListener('load', () => {
- const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
-
- if (isLocalhost) {
- // This is running on localhost. Lets check if a service worker still exists or not.
- checkValidServiceWorker(swUrl);
-
- // Add some additional logging to localhost, pointing developers to the
- // service worker/PWA documentation.
- navigator.serviceWorker.ready.then(() => {
- console.log(
- 'This web app is being served cache-first by a service ' +
- 'worker. To learn more, visit https://goo.gl/SC7cgQ'
- );
- });
- } else {
- // Is not local host. Just register service worker
- registerValidSW(swUrl);
- }
- });
- }
-}
-
-function registerValidSW(swUrl) {
- navigator.serviceWorker
- .register(swUrl)
- .then(registration => {
- registration.onupdatefound = () => {
- const installingWorker = registration.installing;
- installingWorker.onstatechange = () => {
- if (installingWorker.state === 'installed') {
- if (navigator.serviceWorker.controller) {
- // At this point, the old content will have been purged and
- // the fresh content will have been added to the cache.
- // It's the perfect time to display a "New content is
- // available; please refresh." message in your web app.
- console.log('New content is available; please refresh.');
- } else {
- // At this point, everything has been precached.
- // It's the perfect time to display a
- // "Content is cached for offline use." message.
- console.log('Content is cached for offline use.');
- }
- }
- };
- };
- })
- .catch(error => {
- console.error('Error during service worker registration:', error);
- });
-}
-
-function checkValidServiceWorker(swUrl) {
- // Check if the service worker can be found. If it can't reload the page.
- fetch(swUrl)
- .then(response => {
- // Ensure service worker exists, and that we really are getting a JS file.
- if (
- response.status === 404 ||
- response.headers.get('content-type').indexOf('javascript') === -1
- ) {
- // No service worker found. Probably a different app. Reload the page.
- navigator.serviceWorker.ready.then(registration => {
- registration.unregister().then(() => {
- window.location.reload();
- });
- });
- } else {
- // Service worker found. Proceed as normal.
- registerValidSW(swUrl);
- }
- })
- .catch(() => {
- console.log(
- 'No internet connection found. App is running in offline mode.'
- );
- });
-}
-
-export function unregister() {
- if ('serviceWorker' in navigator) {
- navigator.serviceWorker.ready.then(registration => {
- registration.unregister();
- });
- }
-}