Improved CSS reloads in service worker
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d72543b31e
commit
24914cb6ff
@ -250,6 +250,10 @@ export class AnimeNotifier {
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}
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break
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case "reload page":
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location.reload(true)
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break
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}
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}
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@ -1,6 +1,5 @@
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// pack:ignore
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const CACHE = "v-3"
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const RELOADS = new Map<string, Promise<Response>>()
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const ETAGS = new Map<string, string>()
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const CACHEREFRESH = new Map<string, Promise<void>>()
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@ -18,24 +17,55 @@ const EXCLUDECACHE = new Set<string>([
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"/from/",
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// Chrome extension
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"chrome-extension"
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"chrome-extension",
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// Authorization paths /auth/ and /logout are not listed here because they are handled in a special way.
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])
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self.addEventListener("install", (evt: InstallEvent) => {
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class MyCache {
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version: string
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constructor(version: string) {
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this.version = version
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}
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store(request: RequestInfo, response: Response) {
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return caches.open(this.version).then(cache => {
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return cache.put(request, response)
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})
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}
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}
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class MyServiceWorker {
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cache: MyCache
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currentCSP: string
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constructor() {
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this.cache = new MyCache("v-3")
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this.currentCSP = ""
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self.addEventListener("install", (evt: InstallEvent) => evt.waitUntil(this.onInstall(evt)))
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self.addEventListener("activate", (evt: any) => evt.waitUntil(this.onActivate(evt)))
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self.addEventListener("fetch", (evt: FetchEvent) => evt.waitUntil(this.onRequest(evt)))
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self.addEventListener("message", (evt: any) => evt.waitUntil(this.onMessage(evt)))
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self.addEventListener("push", (evt: PushEvent) => evt.waitUntil(this.onPush(evt)))
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self.addEventListener("pushsubscriptionchange", (evt: any) => evt.waitUntil(this.onPushSubscriptionChange(evt)))
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self.addEventListener("notificationclick", (evt: NotificationEvent) => evt.waitUntil(this.onNotificationClick(evt)))
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}
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onInstall(evt: InstallEvent) {
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console.log("service worker install")
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evt.waitUntil(
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(self as any).skipWaiting().then(() => {
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return installCache()
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})
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)
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return (self as any).skipWaiting().then(() => {
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return this.installCache()
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})
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}
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self.addEventListener("activate", (evt: any) => {
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onActivate(evt: any) {
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console.log("service worker activate")
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// Delete old cache
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let cacheWhitelist = [CACHE]
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// Only keep current version of the cache and delete old caches
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let cacheWhitelist = [this.cache.version]
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let deleteOldCache = caches.keys().then(keyList => {
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return Promise.all(keyList.map(key => {
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@ -45,125 +75,49 @@ self.addEventListener("activate", (evt: any) => {
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}))
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})
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// Immediate claim helps us gain control over a new client immediately
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let immediateClaim = (self as any).clients.claim()
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// Immediate claim
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evt.waitUntil(
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Promise.all([
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return Promise.all([
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deleteOldCache,
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immediateClaim
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])
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)
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})
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// controlling service worker
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self.addEventListener("message", (evt: any) => {
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let message = JSON.parse(evt.data)
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let url = message.url
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let refresh = RELOADS.get(url)
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let servedETag = ETAGS.get(url)
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// If the user requests a sub-page we should prefetch the full page, too.
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if(url.includes("/_/")) {
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let fullPage = new Request(url.replace("/_/", "/"))
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fetch(fullPage, {
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credentials: "same-origin"
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})
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.then(response => {
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// Save the new version of the resource in the cache
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let cacheRefresh = caches.open(CACHE).then(cache => {
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return cache.put(fullPage, response)
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})
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CACHEREFRESH.set(fullPage.url, cacheRefresh)
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return cacheRefresh
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})
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}
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if(!refresh || !servedETag) {
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return
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}
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evt.waitUntil(
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refresh.then((response: Response) => {
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// If the fresh copy was used to serve the request instead of the cache,
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// we don"t need to tell the client to do a refresh.
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if(response.bodyUsed) {
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return
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}
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let eTag = response.headers.get("ETag")
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if(eTag === servedETag) {
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return
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}
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ETAGS.set(url, eTag)
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let message = {
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type: "new content",
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url
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}
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let cacheRefresh = CACHEREFRESH.get(url)
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if(!cacheRefresh) {
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console.log("forcing reload, cache refresh null")
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return evt.source.postMessage(JSON.stringify(message))
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}
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return cacheRefresh.then(() => {
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console.log("forcing reload after cache refresh")
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evt.source.postMessage(JSON.stringify(message))
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})
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})
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)
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})
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self.addEventListener("fetch", async (evt: FetchEvent) => {
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onRequest(evt: FetchEvent) {
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let request = evt.request as Request
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let isAuth = request.url.includes("/auth/") || request.url.includes("/logout")
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let ignoreCache = false
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// console.log("fetch:", request.url)
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// If it's not a GET request, fetch it normally
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if(request.method !== "GET") {
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return evt.respondWith(fetch(request))
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}
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// Clear cache on authentication and fetch it normally
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if(request.url.includes("/auth/") || request.url.includes("/logout")) {
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return caches.delete(this.cache.version).then(() => evt.respondWith(fetch(request)))
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}
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// Exclude certain URLs from being cached
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for(let pattern of EXCLUDECACHE.keys()) {
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if(request.url.includes(pattern)) {
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ignoreCache = true
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break
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return evt.respondWith(fetch(request))
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}
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}
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// Delete existing cache on authentication
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if(isAuth) {
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caches.delete(CACHE)
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}
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// Do not use cache in some cases
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if(request.method !== "GET" || isAuth || ignoreCache) {
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return evt.waitUntil(evt.respondWith(fetch(request)))
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}
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// Forced cache response?
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// If the request included the header "X-CacheOnly", return a cache-only response.
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// This is used in reloads to avoid generating a 2nd request after a cache refresh.
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if(request.headers.get("X-CacheOnly") === "true") {
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// console.log("forced cache response")
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return evt.waitUntil(fromCache(request))
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return this.fromCache(request)
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}
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let servedETag = undefined
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// Start fetching the request
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let refresh = fetch(request).then(response => {
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// console.log(response)
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let clone = response.clone()
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// Save the new version of the resource in the cache
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let cacheRefresh = caches.open(CACHE).then(cache => {
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return cache.put(request, clone)
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})
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let cacheRefresh = this.cache.store(request, clone)
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CACHEREFRESH.set(request.url, cacheRefresh)
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@ -174,44 +128,108 @@ self.addEventListener("fetch", async (evt: FetchEvent) => {
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RELOADS.set(request.url, refresh)
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// Forced reload
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if(request.headers.get("X-Reload") === "true") {
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return evt.waitUntil(evt.respondWith(refresh.then(response => {
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let servedETag = undefined
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let onResponse = response => {
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servedETag = response.headers.get("ETag")
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ETAGS.set(request.url, servedETag)
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return response
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})))
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}
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if(request.headers.get("X-Reload") === "true") {
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return evt.respondWith(refresh.then(onResponse))
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}
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// Try to serve cache first and fall back to network response
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let networkOrCache = fromCache(request).then(response => {
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// console.log("served from cache:", request.url)
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servedETag = response.headers.get("ETag")
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ETAGS.set(request.url, servedETag)
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return response
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}).catch(error => {
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let networkOrCache = this.fromCache(request).then(onResponse).catch(error => {
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// console.log("Cache MISS:", request.url)
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return refresh
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})
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return evt.waitUntil(evt.respondWith(networkOrCache))
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return evt.respondWith(networkOrCache)
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}
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onMessage(evt: any) {
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let message = JSON.parse(evt.data)
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let url = message.url
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let refresh = RELOADS.get(url)
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let servedETag = ETAGS.get(url)
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// If the user requests a sub-page we should prefetch the full page, too.
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if(url.includes("/_/")) {
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let fullPage = new Request(url.replace("/_/", "/"))
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let fullPageRefresh = fetch(fullPage, {
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credentials: "same-origin"
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}).then(response => {
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// Save the new version of the resource in the cache
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let cacheRefresh = caches.open(this.cache.version).then(cache => {
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return cache.put(fullPage, response)
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})
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self.addEventListener("push", (evt: PushEvent) => {
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CACHEREFRESH.set(fullPage.url, cacheRefresh)
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return response
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})
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// Save in map
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RELOADS.set(fullPage.url, fullPageRefresh)
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}
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if(!refresh || !servedETag) {
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return Promise.resolve()
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}
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return refresh.then((response: Response) => {
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// If the fresh copy was used to serve the request instead of the cache,
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// we don"t need to tell the client to do a refresh.
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if(response.bodyUsed) {
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return
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}
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// Get ETag
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let eTag = response.headers.get("ETag")
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// Update ETag
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ETAGS.set(url, eTag)
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// Get CSP
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let oldCSP = this.currentCSP
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let csp = response.headers.get("Content-Security-Policy")
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if(csp != oldCSP) {
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this.currentCSP = csp
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if(oldCSP !== "") {
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return this.forceClientReloadPage(url, evt.source)
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}
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}
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// If the ETag changed, we need to do a reload.
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// If the CSP and therefore the sha-1 hash of the CSS changed, we need to do a reload.
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if(eTag !== servedETag) {
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return this.forceClientReloadContent(url, evt.source)
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}
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// Do nothing
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return Promise.resolve()
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})
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}
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onPush(evt: PushEvent) {
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var payload = evt.data ? evt.data.json() : {}
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evt.waitUntil(
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(self as any).registration.showNotification(payload.title, {
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return (self as any).registration.showNotification(payload.title, {
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body: payload.message,
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icon: payload.icon,
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image: payload.image,
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data: payload.link,
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badge: "https://notify.moe/brand/64"
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})
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)
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badge: "https://notify.moe/brand/64.png"
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})
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}
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self.addEventListener("pushsubscriptionchange", (evt: any) => {
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evt.waitUntil((self as any).registration.pushManager.subscribe(evt.oldSubscription.options)
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onPushSubscriptionChange(evt: any) {
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return (self as any).registration.pushManager.subscribe(evt.oldSubscription.options)
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.then(async subscription => {
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console.log("send subscription to server...")
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@ -242,15 +260,14 @@ self.addEventListener("pushsubscriptionchange", (evt: any) => {
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credentials: "same-origin",
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body: JSON.stringify(pushSubscription)
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})
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}))
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})
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}
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self.addEventListener("notificationclick", (evt: NotificationEvent) => {
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onNotificationClick(evt: NotificationEvent) {
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let notification = evt.notification
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notification.close()
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evt.waitUntil(
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(self as any).clients.matchAll().then(function(clientList) {
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return (self as any).clients.matchAll().then(function(clientList) {
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// If we have a link, use that link to open a new window.
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let url = notification.data
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@ -266,11 +283,40 @@ self.addEventListener("notificationclick", (evt: NotificationEvent) => {
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// Otherwise open a new window
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return (self as any).clients.openWindow("https://notify.moe")
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})
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)
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})
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}
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function installCache() {
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return caches.open(CACHE).then(cache => {
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forceClientReloadContent(url: string, eventSource: any) {
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let message = {
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type: "new content",
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url
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}
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this.postMessageAfterPromise(message, CACHEREFRESH.get(url), eventSource)
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}
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forceClientReloadPage(url: string, eventSource: any) {
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let message = {
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type: "reload page",
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url
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}
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this.postMessageAfterPromise(message, RELOADS.get(url.replace("/_/", "/")), eventSource)
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}
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postMessageAfterPromise(message: any, promise: Promise<any>, eventSource: any) {
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if(!promise) {
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console.log("forcing reload, cache refresh null")
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return eventSource.postMessage(JSON.stringify(message))
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}
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return promise.then(() => {
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console.log("forcing reload after cache refresh")
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eventSource.postMessage(JSON.stringify(message))
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})
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}
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installCache() {
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return caches.open(this.cache.version).then(cache => {
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return cache.addAll([
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"./",
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"./scripts",
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@ -279,8 +325,8 @@ function installCache() {
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})
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}
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function fromCache(request) {
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return caches.open(CACHE).then(cache => {
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fromCache(request) {
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return caches.open(this.cache.version).then(cache => {
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return cache.match(request).then(matching => {
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if(matching) {
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// console.log("Cache HIT:", request.url)
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@ -291,3 +337,6 @@ function fromCache(request) {
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})
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})
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}
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}
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const serviceWorker = new MyServiceWorker()
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