118 lines
3.6 KiB
JavaScript
118 lines
3.6 KiB
JavaScript
const CACHE_NAME = 'notes2-{{ .VERSION }}'
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const CACHED_ASSETS = [
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'/',
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'/offline',
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'/css/{{ .VERSION }}/main.css',
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'/css/{{ .VERSION }}/markdown.css',
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'/css/{{ .VERSION }}/notes2.css',
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'/css/{{ .VERSION }}/theme.css',
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'/images/{{ .VERSION }}/collapsed.svg',
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'/images/{{ .VERSION }}/expanded.svg',
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'/images/{{ .VERSION }}/icon_markdown_hollow.svg',
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'/images/{{ .VERSION }}/icon_markdown.svg',
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'/images/{{ .VERSION }}/icon_refresh.svg',
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'/images/{{ .VERSION }}/icon_save_disabled.svg',
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'/images/{{ .VERSION }}/icon_search.svg',
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'/images/{{ .VERSION }}/leaf.svg',
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'/images/{{ .VERSION }}/logo.svg',
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'/js/{{ .VERSION }}/api.mjs',
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'/js/{{ .VERSION }}/app.mjs',
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'/js/{{ .VERSION }}/checklist.mjs',
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'/js/{{ .VERSION }}/crypto.mjs',
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'/js/{{ .VERSION }}/key.mjs',
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'/js/{{ .VERSION }}/lib/custom_html_element.mjs',
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'/js/{{ .VERSION }}/lib/node_modules/marked/lib/marked.esm.js',
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'/js/{{ .VERSION }}/lib/node_modules/marked-token-position/lib/index.esm.js',
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'/js/{{ .VERSION }}/lib/sjcl.js',
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'/js/{{ .VERSION }}/marked_position.mjs',
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'/js/{{ .VERSION }}/mbus.mjs',
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'/js/{{ .VERSION }}/node.mjs',
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'/js/{{ .VERSION }}/node_store.mjs',
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'/js/{{ .VERSION }}/notes2.mjs',
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'/js/{{ .VERSION }}/sync.mjs',
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'/js/{{ .VERSION }}/tree.mjs',
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]
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async function precache() {
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const cache = await caches.open(CACHE_NAME)
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return cache.addAll(CACHED_ASSETS)
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}
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async function fetchAsset(event) {
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try {
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const cache = await caches.open(CACHE_NAME)
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const match = await cache.match(event.request)
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if (match !== undefined) {
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// -----------------------------------------------
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// This page is precached - return it immediately.
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// -----------------------------------------------
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console.debug('From cache', event.request.url)
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return match
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} else {
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// ---------------------------------------------------------------
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// Not in cache - send it for an online request/browser cache hit.
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// ---------------------------------------------------------------
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console.debug('From network', event.request.url)
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const resp = await fetch(event.request)
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// This will trigger on an HTTP error such as 502.
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if (!resp.ok) {
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console.error('HTTP error', resp.status)
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// When JSON is expected, return that instead of the offline HTML page.
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return await offline(event, `${resp.status} ${resp.statusText}`)
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}
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return resp
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}
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} catch (e) {
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// An error here is something like a DNS problem, not a regular HTTP problem.
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console.error('Network error', e, event.request.url)
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return await offline(event, e)
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}
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}
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async function offline(event, errText) {
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if (event.request.headers.get('X-JSON')) {
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return new Response('{ "OK": false, "Error": "Network is offline"}', { headers: { 'Content-Type': 'application/json' } })
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}
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const cache = await caches.open(CACHE_NAME)
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const offline = await cache.match('/offline')
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let body = await offline.text()
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body = body.replace('||ERROR||', errText)
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return new Response(body, { headers: { 'Content-Type': 'text/html' } })
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}
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async function cleanupCache() {
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const keys = await caches.keys()
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const keysToDelete = keys.map(key => {
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if (key !== CACHE_NAME)
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return caches.delete(key)
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})
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return Promise.all(keysToDelete)
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}
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self.addEventListener('install', event => {
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console.debug('SERVICE WORKER: install')
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self.skipWaiting()
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event.waitUntil(precache())
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})
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self.addEventListener('activate', event => {
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console.debug('SERVICE WORKER: activate')
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self.clients.claim()
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event.waitUntil(cleanupCache())
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})
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self.addEventListener('fetch', event => {
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// console.debug('SERVICE WORKER: fetch', event.request.url)
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if ({{ .DevMode }})
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return event
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event.respondWith(fetchAsset(event))
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})
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