feat: use Redis as simple cache for fetched articles

.vscode/settings.json

@@ -0,0 +1 @@
+{}

package.json

@@ -34,6 +34,7 @@
     "astro": "^5.12.8",
     "astro-iconify": "^1.2.0",
     "fastify": "^5.4.0",
+    "redis": "^5.8.0",
     "ultrahtml": "^1.6.0"
   },
   "devDependencies": {

pnpm-lock.yaml

@@ -38,6 +38,9 @@ importers:
       fastify:
         specifier: ^5.4.0
         version: 5.4.0
+      redis:
+        specifier: ^5.8.0
+        version: 5.8.0
       ultrahtml:
         specifier: ^1.6.0
         version: 1.6.0
@@ -855,6 +858,34 @@ packages:
     resolution: {integrity: sha512-QNqXyfVS2wm9hweSYD2O7F0G06uurj9kZ96TRQE5Y9hU7+tgdZwIkbAKc5Ocy1HxEY2kuDQa6cQ1WRs/O5LFKA==}
     engines: {node: ^12.20.0 || ^14.18.0 || >=16.0.0}
 
+  '@redis/bloom@5.8.0':
+    resolution: {integrity: sha512-kpKZzAAjGiGYn88Bqq6+ozxPg6kGYWRZH9vnOwGcoSCbrW14SZpZVMYMFSio8FH9ZJUdUcmT/RLGlA1W1t0UWQ==}
+    engines: {node: '>= 18'}
+    peerDependencies:
+      '@redis/client': ^5.8.0
+
+  '@redis/client@5.8.0':
+    resolution: {integrity: sha512-ywZjKGoSSAECGYOd9bJpws6d4867SN686obUWT/sRmo1c/Q8V+jWyInvlqwKa0BOvTHHwYeB2WFUEvd6PADeOQ==}
+    engines: {node: '>= 18'}
+
+  '@redis/json@5.8.0':
+    resolution: {integrity: sha512-xPBpwY6aKoRzMSu67MpwrBiSliON9bfHo9Y/pSPBjW8/KoOm1MzGqwJUO20qdjXpFoKJsDWwxIE1LHdBNzcImw==}
+    engines: {node: '>= 18'}
+    peerDependencies:
+      '@redis/client': ^5.8.0
+
+  '@redis/search@5.8.0':
+    resolution: {integrity: sha512-lF9pNv9vySmirm1EzCH6YeRjhvH6lLT7tvebYHEM7WTkEQ/7kZWb4athliKESHpxzTQ36U9UbzuedSywHV6OhQ==}
+    engines: {node: '>= 18'}
+    peerDependencies:
+      '@redis/client': ^5.8.0
+
+  '@redis/time-series@5.8.0':
+    resolution: {integrity: sha512-kPTlW2ACXokjQNXjCD8Pw9mHDoB94AHUlHFahyjxz9lUJUVwiva2Dgfrd2k3JxHhSBqyY2PREIj9YwIUSTSSqQ==}
+    engines: {node: '>= 18'}
+    peerDependencies:
+      '@redis/client': ^5.8.0
+
   '@rollup/pluginutils@5.2.0':
     resolution: {integrity: sha512-qWJ2ZTbmumwiLFomfzTyt5Kng4hwPi9rwCYN4SHb6eaRU1KNO4ccxINHr/VhH4GgPlt1XfSTLX2LBTme8ne4Zw==}
     engines: {node: '>=14.0.0'}
@@ -1431,6 +1462,10 @@ packages:
     resolution: {integrity: sha512-eYm0QWBtUrBWZWG0d386OGAw16Z995PiOVo2B7bjWSbHedGl5e0ZWaq65kOGgUSNesEIDkB9ISbTg/JK9dhCZA==}
     engines: {node: '>=6'}
 
+  cluster-key-slot@1.1.2:
+    resolution: {integrity: sha512-RMr0FhtfXemyinomL4hrWcYJxmX6deFdCxpJzhDttxgO1+bcCnkk+9drydLVDmAMG7NE6aN/fl4F7ucU/90gAA==}
+    engines: {node: '>=0.10.0'}
+
   color-convert@2.0.1:
     resolution: {integrity: sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==}
     engines: {node: '>=7.0.0'}
@@ -2972,6 +3007,10 @@ packages:
     resolution: {integrity: sha512-57frrGM/OCTLqLOAh0mhVA9VBMHd+9U7Zb2THMGdBUoZVOtGbJzjxsYGDJ3A9AYYCP4hn6y1TVbaOfzWtm5GFg==}
     engines: {node: '>= 12.13.0'}
 
+  redis@5.8.0:
+    resolution: {integrity: sha512-re0MHm1KHbiVIUPDGoUM3jldvjH5EM/wGZ3A33gyUYoC/UnVNKNnZHM5hcJVry7L2O2eJU3nflSXTliv10BTKg==}
+    engines: {node: '>= 18'}
+
   reflect.getprototypeof@1.0.10:
     resolution: {integrity: sha512-00o4I+DVrefhv+nX0ulyi3biSHCPDe+yLv5o/p6d/UVlirijB8E16FtfwSAi4g3tcqrQ4lRAqQSoFEZJehYEcw==}
     engines: {node: '>= 0.4'}
@@ -4592,6 +4631,26 @@ snapshots:
 
   '@pkgr/core@0.2.9': {}
 
+  '@redis/bloom@5.8.0(@redis/client@5.8.0)':
+    dependencies:
+      '@redis/client': 5.8.0
+
+  '@redis/client@5.8.0':
+    dependencies:
+      cluster-key-slot: 1.1.2
+
+  '@redis/json@5.8.0(@redis/client@5.8.0)':
+    dependencies:
+      '@redis/client': 5.8.0
+
+  '@redis/search@5.8.0(@redis/client@5.8.0)':
+    dependencies:
+      '@redis/client': 5.8.0
+
+  '@redis/time-series@5.8.0(@redis/client@5.8.0)':
+    dependencies:
+      '@redis/client': 5.8.0
+
   '@rollup/pluginutils@5.2.0(rollup@4.46.2)':
     dependencies:
       '@types/estree': 1.0.8
@@ -5343,6 +5402,8 @@ snapshots:
 
   clsx@2.1.1: {}
 
+  cluster-key-slot@1.1.2: {}
+
   color-convert@2.0.1:
     dependencies:
       color-name: 1.1.4
@@ -7243,6 +7304,14 @@ snapshots:
 
   real-require@0.2.0: {}
 
+  redis@5.8.0:
+    dependencies:
+      '@redis/bloom': 5.8.0(@redis/client@5.8.0)
+      '@redis/client': 5.8.0
+      '@redis/json': 5.8.0(@redis/client@5.8.0)
+      '@redis/search': 5.8.0(@redis/client@5.8.0)
+      '@redis/time-series': 5.8.0(@redis/client@5.8.0)
+
   reflect.getprototypeof@1.0.10:
     dependencies:
       call-bind: 1.0.8

src/pages/index.astro

@@ -1,11 +1,16 @@
 ---
-import { ArticleData, extract } from '@extractus/article-extractor'
+import { createClient } from 'redis'
+import { type ArticleData, extract } from '@extractus/article-extractor'
 import SimpleAddressBar from '../components/SimpleAddressBar.astro'
 import Post from '../components/Post.astro'
 import App from '../layouts/App.astro'
 import Library from '../components/Library.astro'
 import Footer from '../components/Footer.astro'
 
+const client = createClient()
+// TODO: put on a log file
+client.on('error', (err) => console.error('Redis Client Error', err))
+await client.connect()
 export const prerender = false
 
 let url = Astro.url.searchParams.get('url')
@@ -15,12 +20,25 @@ while (url?.startsWith(Astro.url.origin)) {
   url = new URL(url).searchParams.get('url')
 }
 
-if (url)
+if (url) {
+  // try cache
+  article = (await client.json.get(url)) as ArticleData
+  if (article !== null) {
+    console.log('>>> Using cached content', article.url)
+  } else {
     try {
       article = await extract(url)
+      console.log('>>> Using fetched content', article?.url)
+      if (article !== null) {
+        // cache via redis
+        await client.json.set(url, '$', article)
+        console.log('>>> Added to cache', article.url)
+      }
     } catch {
       article = null
     }
+  }
+}
 ---
 
 <App article={article}>