feat: Service Worker to preload/cancel images and other resources

Makefile

@@ -17,6 +17,9 @@ e2e:
 prod:
 	docker compose -f ./docker/docker-compose.prod.yml up --build -V --remove-orphans
 
+prod-down:
+	docker compose -f ./docker/docker-compose.prod.yml down --remove-orphans
+
 prod-scale:
 	docker compose -f ./docker/docker-compose.prod.yml up --build -V --scale immich-server=3 --scale immich-microservices=3 --remove-orphans
 

docker/caddy/Caddyfile

@@ -0,0 +1,24 @@
+{
+    # debug
+    local_certs
+    log {
+		format console
+    }
+    pki {
+		ca local {
+           name "Immich Local CA - TESTING ONLY"
+           intermediate_lifetime 3599d
+		}
+	}
+    grace_period 0
+    shutdown_delay 0
+    skip_install_trust
+    auto_https disable_redirects
+}
+
+{$IMMICH_HOST}:3443 {
+    tls internal {
+        on_demand
+    }
+    reverse_proxy {$IMMICH_INTERNAL_URL}
+}

docker/caddy/certs/README.md

@@ -0,0 +1,15 @@
+## What is in this folder? 
+
+These are Caddy certificates necessary for local development using the service-worker, clipboard access, etc. 
+
+This folder contains certs root and intermediate CAs. Caddy uses this to sign its server certs.
+
+These certificates have a 10yr expiration date. They should NOT be used in production. 
+
+## How to use?
+1. You should import these into your system keychain or truststore. (OS-specific)
+2. Ensure 'immich-dev' resolves to the docker host.
+    *  i.e. add entry in /etc/hosts that points to the host running the immich docker container. 
+
+## Permissions
+Caddy runs as root user. These files must be owned by root with 600 permissions. You make need to temporarily make these 644 so you can copy/import them into your trust store. 

docker/caddy/certs/intermediate.crt

@@ -0,0 +1,12 @@
+-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

docker/caddy/certs/intermediate.key

@@ -0,0 +1,5 @@
+-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEIPO0Ao4ha+T3Op2UljmdroXbvsDrKYMqGvu9762W+mZqoAoGCCqGSM49
+AwEHoUQDQgAEMgM3g9HfpZT5dlhpTHN1Gl1Hk9Qnfih6qe2FEi/HPmTW/fbili+T
++6cqSvj/vf5iJCBsYlihe5LVGiwyHr4nhg==
+-----END EC PRIVATE KEY-----

docker/caddy/certs/root.crt

@@ -0,0 +1,12 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

docker/caddy/certs/root.key

@@ -0,0 +1,5 @@
+-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEIDrpG22VrpagAKo7dPL16RihojPr7MgYcKwZA5jSMrXioAoGCCqGSM49
+AwEHoUQDQgAE3GRpgCVK0nHtazrzT3EgDPYQ0v/TaKWFvfN95+dpKqwvgK1GbDBw
+tgcTeTXZbvmnNvPKEq1Cizsc3rNC6/iXrQ==
+-----END EC PRIVATE KEY-----

docker/docker-compose.dev.yml

@@ -14,6 +14,21 @@
 name: immich-dev
 
 services:
+  immich-caddy:
+    container_name: immich_caddy
+    image: caddy:2.9.1-alpine
+    restart: unless-stopped
+    ports:
+      - "2019:2019"
+      - "3443:3443"
+      - "3443:3443/udp"
+    environment:
+      IMMICH_HOST: immich-dev
+      IMMICH_INTERNAL_URL: http://immich-web:3000
+    volumes:
+      - ./caddy:/etc/caddy
+      - ./caddy/certs:/data/caddy/pki/authorities/local
+    command: ["/bin/sh", "-c", "chown 0:0 /data/caddy/pki/authorities/local/*; chmod 600 /data/caddy/pki/authorities/local/*; caddy run --config /etc/caddy/Caddyfile --adapter caddyfile"]
   immich-server:
     container_name: immich_server
     command: ['/usr/src/app/bin/immich-dev']

docker/docker-compose.prod.yml

@@ -10,6 +10,20 @@
 name: immich-prod
 
 services:
+  immich-caddy:
+    container_name: immich_caddy
+    image: caddy:2.9.1-alpine
+    restart: unless-stopped
+    ports:
+      - "3443:3443"
+      - "3443:3443/udp"
+    environment:
+      IMMICH_HOST: immich-dev
+      IMMICH_INTERNAL_URL: http://immich-server:2283
+    volumes:
+      - ./caddy:/etc/caddy
+      - ./caddy/certs:/data/caddy/pki/authorities/local
+    command: ["/bin/sh", "-c", "chown 0:0 /data/caddy/pki/authorities/local/*; chmod 600 /data/caddy/pki/authorities/local/*; caddy run --config /etc/caddy/Caddyfile --adapter caddyfile"]
   immich-server:
     container_name: immich_server
     image: immich-server:latest

web/eslint.config.mjs

@@ -64,6 +64,8 @@ export default [
       },
     },
 
+    ignores: ['**/service-worker/**'],
+
     rules: {
       '@typescript-eslint/no-unused-vars': [
         'warn',

web/src/lib/components/asset-viewer/photo-viewer.svelte

@@ -21,6 +21,7 @@
   import FaceEditor from '$lib/components/asset-viewer/face-editor/face-editor.svelte';
   import { photoViewerImgElement } from '$lib/stores/assets-store.svelte';
   import { isFaceEditMode } from '$lib/stores/face-edit.svelte';
+  import { cancelImageUrl, preloadImageUrl } from '$lib/utils/sw-messaging';
 
   interface Props {
     asset: AssetResponseDto;
@@ -71,8 +72,7 @@
   const preload = (useOriginal: boolean, preloadAssets?: AssetResponseDto[]) => {
     for (const preloadAsset of preloadAssets || []) {
       if (preloadAsset.type === AssetTypeEnum.Image) {
-        let img = new Image();
+        preloadImageUrl(getAssetUrl(preloadAsset.id, useOriginal, preloadAsset.thumbhash));
-        img.src = getAssetUrl(preloadAsset.id, useOriginal, preloadAsset.thumbhash);
       }
     }
   };
@@ -150,6 +150,7 @@
     return () => {
       loader?.removeEventListener('load', onload);
       loader?.removeEventListener('error', onerror);
+      cancelImageUrl(imageLoaderUrl);
     };
   });
   let isWebCompatible = $derived(isWebCompatibleImage(asset));

web/src/lib/components/assets/thumbnail/image-thumbnail.svelte

@@ -2,9 +2,10 @@
   import { thumbhash } from '$lib/actions/thumbhash';
   import BrokenAsset from '$lib/components/assets/broken-asset.svelte';
   import Icon from '$lib/components/elements/icon.svelte';
+  import { cancelImageUrl } from '$lib/utils/sw-messaging';
   import { TUNABLES } from '$lib/utils/tunables';
   import { mdiEyeOffOutline } from '@mdi/js';
-  import { onMount } from 'svelte';
+  import { onMount, onDestroy } from 'svelte';
   import { fade } from 'svelte/transition';
 
   interface Props {
@@ -64,6 +65,9 @@
       setLoaded();
     }
   });
+  onDestroy(() => {
+    cancelImageUrl(url);
+  });
 
   let optionalClasses = $derived(
     [

web/src/lib/utils/sw-messaging.ts

@@ -0,0 +1,8 @@
+const broadcast = new BroadcastChannel('immich');
+
+export function cancelImageUrl(url: string) {
+  broadcast.postMessage({ type: 'cancel', url });
+}
+export function preloadImageUrl(url: string) {
+  broadcast.postMessage({ type: 'preload', url });
+}

web/src/service-worker/index.ts

@@ -0,0 +1,137 @@
+/// <reference types="@sveltejs/kit" />
+/// <reference no-default-lib="true"/>
+/// <reference lib="esnext" />
+/// <reference lib="webworker" />
+
+const sw = globalThis as unknown as ServiceWorkerGlobalScope;
+import { build, files, version } from '$service-worker';
+
+const pendingLoads = new Map<string, AbortController>();
+const useCache = true;
+// Create a unique cache name for this deployment
+const CACHE = `cache-${version}`;
+
+const APP_RESOURCES = [
+  ...build, // the app itself
+  ...files, // everything in `static`
+];
+
+sw.addEventListener('install', (event) => {
+  event.waitUntil(sw.skipWaiting());
+  // Create a new cache and add all files to it
+  event.waitUntil(addFilesToCache());
+});
+
+sw.addEventListener('activate', (event) => {
+  event.waitUntil(sw.clients.claim());
+  // Remove previous cached data from disk
+  event.waitUntil(deleteOldCaches());
+});
+
+sw.addEventListener('fetch', (event) => {
+  // ignore POST requests etc
+  if (event.request.method !== 'GET') return;
+  const url = new URL(event.request.url);
+  if (APP_RESOURCES.includes(url.pathname)) {
+    event.respondWith(appResources(url, event));
+  } else if (/^\/api\/assets\/[a-f0-9-]+\/(original|thumbnail)/.test(url.pathname)) {
+    event.respondWith(immichAsset(url));
+  }
+});
+
+async function deleteOldCaches() {
+  for (const key of await caches.keys()) {
+    if (key !== CACHE) await caches.delete(key);
+  }
+}
+
+async function addFilesToCache() {
+  const cache = await caches.open(CACHE);
+  await cache.addAll(APP_RESOURCES);
+}
+
+async function immichAsset(url: URL) {
+  const cache = await caches.open(CACHE);
+  let response = useCache ? await cache.match(url) : undefined;
+  if (!response) {
+    try {
+      const cancelToken = new AbortController();
+      const request = fetch(url, {
+        signal: cancelToken.signal,
+      });
+      pendingLoads.set(url.toString(), cancelToken);
+      response = await request;
+      if (!(response instanceof Response)) {
+        throw new TypeError('invalid response from fetch');
+      }
+      if (response.status === 200) {
+        cache.put(url, response.clone());
+      }
+    } catch (error) {
+      // eslint-disable-next-line  @typescript-eslint/no-explicit-any
+      if ((error as any).name !== 'AbortError') {
+        throw error;
+      }
+    } finally {
+      pendingLoads.delete(url.toString());
+    }
+  }
+  return response as Response;
+}
+
+async function appResources(url: URL, event: FetchEvent) {
+  const cache = await caches.open(CACHE);
+  // `build`/`files` can always be served from the cache
+  if (APP_RESOURCES.includes(url.pathname)) {
+    const response = await cache.match(url.pathname);
+    if (response) {
+      return response;
+    }
+  }
+  // for everything else, try the network first, but
+  // fall back to the cache if we're offline
+  try {
+    const response = await fetch(event.request);
+    // if we're offline, fetch can return a value that is not a Response
+    // instead of throwing - and we can't pass this non-Response to respondWith
+    if (!(response instanceof Response)) {
+      throw new TypeError('invalid response from fetch');
+    }
+
+    if (response.status === 200) {
+      cache.put(event.request, response.clone());
+    }
+
+    return response;
+  } catch (error) {
+    const response = await cache.match(event.request);
+    if (response) {
+      return response;
+    }
+    // if there's no cache, then just error out
+    // as there is nothing we can do to respond to this request
+    throw error;
+  }
+}
+
+const broadcast = new BroadcastChannel('immich');
+// eslint-disable-next-line  unicorn/prefer-add-event-listener
+broadcast.onmessage = (event) => {
+  if (!event.data) {
+    return;
+  }
+  if (event.data.type === 'cancel') {
+    const urlstring = event.data.url;
+    const url = new URL(urlstring, event.origin);
+
+    const pending = pendingLoads.get(url.toString());
+    if (pending) {
+      pending.abort();
+      pendingLoads.delete(url.toString());
+    }
+  } else if (event.data.type === 'preload') {
+    const urlstring = event.data.url;
+    const url = new URL(urlstring, event.origin);
+    immichAsset(url);
+  }
+};