🖥️ Home Server Monitor

Real-time server status tracking

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Checking...

Loading status...

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\n How it works:
\n • Your server pings this app every 15 minutes
\n • If no ping received for 1+ hour, you'll get notified
\n • Subscribe to get push notifications when server is down\n

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\n Server Heartbeat Endpoint:
\n POST /heartbeat\n

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\n\n \n \n \n );\n}\n\nexport default async function(req: Request): Promise {\n const url = new URL(req.url);\n const path = url.pathname;\n\n // Enable CORS\n const corsHeaders = {\n \"Access-Control-Allow-Origin\": \"*\",\n \"Access-Control-Allow-Methods\": \"GET, POST, OPTIONS\",\n \"Access-Control-Allow-Headers\": \"Content-Type\",\n };\n\n if (req.method === \"OPTIONS\") {\n return new Response(null, { headers: corsHeaders });\n }\n\n await initDB();\n\n try {\n // Service Worker\n if (path === \"/sw.js\") {\n const sw = `\nself.addEventListener('push', function(event) {\n console.log('Push notification received:', event);\n \n let data = { title: 'Server Status', body: 'Notification received' };\n \n if (event.data) {\n try {\n data = event.data.json();\n } catch (e) {\n data.body = event.data.text();\n }\n }\n \n const options = {\n body: data.body,\n icon: data.icon || '/icon-192.png',\n badge: data.badge || '/badge-96.png',\n vibrate: [200, 100, 200],\n timestamp: data.timestamp || Date.now(),\n requireInteraction: true,\n actions: [\n { action: 'view', title: 'View Status' },\n { action: 'close', title: 'Close' }\n ]\n };\n \n event.waitUntil(\n self.registration.showNotification(data.title, options)\n );\n});\n\nself.addEventListener('notificationclick', function(event) {\n console.log('Notification clicked:', event.action);\n \n event.notification.close();\n \n if (event.action === 'view' || !event.action) {\n event.waitUntil(\n clients.openWindow('/')\n );\n }\n});\n\nself.addEventListener('install', function(event) {\n console.log('Service Worker installing...');\n self.skipWaiting();\n});\n\nself.addEventListener('activate', function(event) {\n console.log('Service Worker activating...');\n event.waitUntil(clients.claim());\n});\n`;\n return new Response(sw, {\n headers: {\n \"Content-Type\": \"application/javascript\",\n \"Cache-Control\": \"no-cache\",\n },\n });\n }\n\n // PWA Manifest\n if (path === \"/manifest.json\") {\n const manifest = {\n name: \"Home Server Monitor\",\n short_name: \"Server Mon\",\n description: \"Monitor your home server status with real-time notifications\",\n start_url: \"/\",\n display: \"standalone\",\n background_color: \"#1a1a1a\",\n theme_color: \"#1a1a1a\",\n orientation: \"portrait\",\n icons: [\n {\n src: \"https://em-content.zobj.net/thumbs/240/apple/354/desktop-computer_1f5a5-fe0f.png\",\n sizes: \"240x240\",\n type: \"image/png\",\n purpose: \"any maskable\"\n }\n ]\n };\n return new Response(JSON.stringify(manifest, null, 2), {\n headers: {\n \"Content-Type\": \"application/json\",\n \"Cache-Control\": \"public, max-age=3600\"\n }\n });\n }\n\n // Heartbeat endpoint - your server calls this\n if (path === \"/heartbeat\" && req.method === \"POST\") {\n await sqlite.execute({\n sql: \"INSERT INTO heartbeats (timestamp) VALUES (?)\",\n args: [Date.now()],\n });\n \n return new Response(JSON.stringify({ success: true, timestamp: Date.now() }), {\n headers: { ...corsHeaders, \"Content-Type\": \"application/json\" },\n });\n }\n\n // Get last heartbeat status\n if (path === \"/status\" && req.method === \"GET\") {\n const result = await sqlite.execute(\n \"SELECT timestamp FROM heartbeats ORDER BY timestamp DESC LIMIT 1\"\n );\n \n const lastHeartbeat = result.rows[0]?.timestamp as number || null;\n const now = Date.now();\n const isOnline = lastHeartbeat ? (now - lastHeartbeat) < 60 * 60 * 1000 : false;\n const minutesSince = lastHeartbeat ? Math.floor((now - lastHeartbeat) / 60000) : null;\n \n return new Response(JSON.stringify({ \n lastHeartbeat,\n isOnline,\n minutesSince,\n currentTime: now\n }), {\n headers: { ...corsHeaders, \"Content-Type\": \"application/json\" },\n });\n }\n\n // Subscribe to notifications\n if (path === \"/subscribe\" && req.method === \"POST\") {\n const subscription = await req.json();\n \n await sqlite.execute({\n sql: `INSERT OR REPLACE INTO subscriptions (endpoint, p256dh, auth, created_at) \n VALUES (?, ?, ?, ?)`,\n args: [\n subscription.endpoint,\n subscription.keys.p256dh,\n subscription.keys.auth,\n Date.now(),\n ],\n });\n \n return new Response(JSON.stringify({ success: true }), {\n headers: { ...corsHeaders, \"Content-Type\": \"application/json\" },\n });\n }\n\n // Get VAPID public key for push notifications\n if (path === \"/vapid-public-key\" && req.method === \"GET\") {\n const publicKey = Deno.env.get(\"VAPID_PUBLIC_KEY\") || \"\";\n \n return new Response(JSON.stringify({ publicKey }), {\n headers: { ...corsHeaders, \"Content-Type\": \"application/json\" },\n });\n }\n\n // Default: serve UI\n if (path === \"/\") {\n const html = \"\" + renderToString();\n return new Response(html, {\n headers: { \"Content-Type\": \"text/html\" },\n });\n }\n\n return new Response(\"Not Found\", { status: 404, headers: corsHeaders });\n } catch (error) {\n console.error(\"Error:\", error);\n return new Response(JSON.stringify({ error: error.message }), {\n status: 500,\n headers: { ...corsHeaders, \"Content-Type\": \"application/json\" },\n });\n }\n}","halffullheartbeat",[],[101],{"_106":201,"_97":202,"_162":203,"_164":-5,"_165":147,"_166":204,"_168":205,"_108":206,"_102":33,"_171":207,"_173":208,"_175":22,"_176":-5,"_177":209,"_100":210},"ea62b24c-0bab-11f1-9901-42dde27851f2","monitor.ts","ea62b2f6-0bab-11f1-9901-42dde27851f2",4,true,["D",1771296842478],"interval","import { sqlite } from \"https://esm.town/v/std/sqlite@14-main/main.ts\";\nimport webpush from \"npm:web-push@3.6.7\";\n\n// This runs every 15 minutes to check if server is down\nexport default async function() {\n console.log(\"Checking server status...\", new Date().toISOString());\n\n try {\n // Get the last heartbeat\n const result = await sqlite.execute(\n \"SELECT timestamp FROM heartbeats ORDER BY timestamp DESC LIMIT 1\"\n );\n \n const lastHeartbeat = result.rows[0]?.timestamp as number || null;\n \n if (!lastHeartbeat) {\n console.log(\"No heartbeats recorded yet\");\n return;\n }\n\n const now = Date.now();\n const timeSinceLastHeartbeat = now - lastHeartbeat;\n const oneHour = 60 * 60 * 1000;\n \n console.log(`Last heartbeat: ${Math.floor(timeSinceLastHeartbeat / 60000)} minutes ago`);\n\n // If more than 1 hour since last heartbeat, send notifications\n if (timeSinceLastHeartbeat > oneHour) {\n console.log(\"Server is DOWN! Sending notifications...\");\n \n // Get all subscriptions\n const subscriptions = await sqlite.execute(\"SELECT * FROM subscriptions\");\n \n if (subscriptions.rows.length === 0) {\n console.log(\"No subscribers to notify\");\n return;\n }\n\n // Configure web-push with VAPID keys\n const vapidPublicKey = Deno.env.get(\"VAPID_PUBLIC_KEY\");\n const vapidPrivateKey = Deno.env.get(\"VAPID_PRIVATE_KEY\");\n const vapidEmail = Deno.env.get(\"VAPID_EMAIL\") || \"mailto:admin@example.com\";\n\n if (!vapidPublicKey || !vapidPrivateKey) {\n console.error(\"VAPID keys not configured! Please set VAPID_PUBLIC_KEY and VAPID_PRIVATE_KEY environment variables.\");\n return;\n }\n\n webpush.setVapidDetails(vapidEmail, vapidPublicKey, vapidPrivateKey);\n\n // Send notification to each subscriber\n const minutesSince = Math.floor(timeSinceLastHeartbeat / 60000);\n const payload = JSON.stringify({\n title: \"🔴 Home Server Down\",\n body: `Your server hasn't responded in ${minutesSince} minutes`,\n icon: \"/icon.png\",\n badge: \"/badge.png\",\n timestamp: now,\n });\n\n for (const sub of subscriptions.rows) {\n try {\n await webpush.sendNotification(\n {\n endpoint: sub.endpoint as string,\n keys: {\n p256dh: sub.p256dh as string,\n auth: sub.auth as string,\n },\n },\n payload\n );\n console.log(`✓ Notification sent to ${sub.endpoint}`);\n } catch (error) {\n console.error(`Failed to send notification to ${sub.endpoint}:`, error.message);\n \n // If subscription is no longer valid, remove it\n if (error.statusCode === 410) {\n await sqlite.execute({\n sql: \"DELETE FROM subscriptions WHERE endpoint = ?\",\n args: [sub.endpoint],\n });\n console.log(`Removed invalid subscription: ${sub.endpoint}`);\n }\n }\n }\n } else {\n console.log(\"Server is online ✓\");\n }\n } catch (error) {\n console.error(\"Monitor error:\", error);\n }\n}",[],[202],"files",[159,180,190,200],"counts",{"_215":33,"_216":170,"_217":33,"_218":219,"_222":223},"pulls","branches","forks","envVars",{"_220":194,"_221":33},"count","emptyCount","connections",{"_220":33,"_224":33},"unfilledCount","contents",[],{"_106":191,"_165":147,"_162":192,"_97":101,"_173":196,"_171":195,"_102":194,"_164":-5,"_108":228,"_166":103,"_176":197,"_100":229},["D",1771314496347],[101],"upstreamProject","upstreamBranch","emptyEnvVars","isNew","flags",[],"routes/_app.x.$handle.$name.branch.$branch.version.$version.code.$",{"_95":96,"_97":98,"_99":45,"_102":103,"_100":101,"_104":238,"_157":243,"_211":256,"_172":257,"_225":260,"_261":-5,"_262":-5,"_263":-5,"_264":-5,"_265":266,"_218":-5},{"_106":107,"_97":98,"_108":239,"_110":-5,"_111":22,"_112":113,"_114":-5,"_115":-5,"_14":116,"_117":-5,"_118":22,"_119":-5,"_120":-5,"_121":33,"_16":122,"_123":124,"_125":126,"_127":128,"_129":128,"_130":131,"_132":131,"_133":131,"_134":128,"_135":128,"_23":240,"_139":241,"_144":242,"_156":22},["D",1771295494247],{"_95":96,"_137":138},{"_95":96,"_141":138,"_14":116,"_142":143},{"_102":146,"_97":45,"_106":147,"_148":107,"_149":-5,"_150":-5,"_151":-5,"_152":-5,"_153":-5,"_154":98,"_155":96},[244,247,250,253],{"_106":160,"_97":161,"_162":163,"_164":-5,"_165":147,"_166":167,"_168":22,"_108":169,"_102":170,"_171":172,"_173":174,"_175":22,"_176":-5,"_177":245,"_100":246},[],[161],{"_106":181,"_97":182,"_162":183,"_164":-5,"_165":147,"_166":184,"_168":22,"_108":185,"_102":33,"_171":186,"_173":187,"_175":22,"_176":-5,"_177":248,"_100":249},[],[182],{"_106":191,"_97":101,"_162":192,"_164":-5,"_165":147,"_166":103,"_168":22,"_108":193,"_102":194,"_171":195,"_173":196,"_175":22,"_176":197,"_177":251,"_100":252},[],[101],{"_106":201,"_97":202,"_162":203,"_164":-5,"_165":147,"_166":204,"_168":205,"_108":206,"_102":33,"_171":207,"_173":208,"_175":22,"_176":-5,"_177":254,"_100":255},[],[202],[244,247,250,253],{"_106":191,"_97":101,"_162":192,"_164":-5,"_165":147,"_166":103,"_168":22,"_108":258,"_102":194,"_171":195,"_173":196,"_175":22,"_176":197,"_100":259},["D",1771314496347],[101],[],"upstream","pull","ahead","behind","templates",[],"actionData","errors"]