add health checking metadata, ios errors

src/router/html.ts

@@ -1,5 +1,6 @@
 import { Elysia } from 'elysia';
 import { m, eta, error } from '@/utils/html'
+import healthStatus from '@/utils/health';
 const app = new Elysia()
 
 app.get('/', async ({ set }) => {
@@ -14,10 +15,15 @@ app.get('/', async ({ set }) => {
 app.get('/save', async ({ query: { url }, set, error }) => {
   if (!url) return error(400, 'No url provided.')
 
+  let websocket = process.env.WEBSOCKET
+  if (healthStatus[process.env.METADATA!] != 'healthy') {
+    websocket = process.env.ALTERNATIVE_WEBSOCKET!
+  }
+
   set.headers['Content-Type'] = 'text/html; charset=utf-8'
   return await m(eta.render('./save', { 
     title: 'Save Video | PreserveTube',
-    websocket: process.env.WEBSOCKET,
+    websocket,
     sitekey: process.env.SITEKEY,
     url
   }))
@@ -26,10 +32,15 @@ app.get('/save', async ({ query: { url }, set, error }) => {
 app.get('/savechannel', async ({ query: { url }, set, error }) => {
   if (!url) return error(400, 'No url provided.')
 
+  let websocket = process.env.WEBSOCKET
+  if (healthStatus[process.env.METADATA!] != 'healthy') {
+    websocket = process.env.ALTERNATIVE_WEBSOCKET!
+  }
+
   set.headers['Content-Type'] = 'text/html; charset=utf-8'
   return await m(eta.render('./savechannel', { 
     title: 'Save Channel | PreserveTube',
-    websocket: process.env.WEBSOCKET,
+    websocket,
     sitekey: process.env.SITEKEY,
     url
   }))

src/templates/save.eta

@@ -21,6 +21,10 @@
   const h3 = document.getElementById("bottom")
   const captcha = document.getElementById("captcha")
 
+  ws.onopen = function () {
+    document.querySelector("footer").innerHTML = `page rendered by <code><%= hostname %></code>, connected via <code>${websocket.split('-')[1].split('.')[0]}</code>`
+  }
+
   ws.onmessage = function (msg) {
     const text = msg.data.split(' - ').slice(1).join(' - ')
 

src/templates/savechannel.eta

@@ -18,6 +18,10 @@
   const h3 = document.getElementById("bottom")
   const captcha = document.getElementById("captcha")
 
+  ws.onopen = function () {
+    document.querySelector("footer").innerHTML = `page rendered by <code><%= hostname %></code>, connected via <code>${websocket.split('-')[1].split('.')[0]}</code>`
+  }
+
   ws.onmessage = function (msg) {
     const text = msg.data.split(' - ').slice(1).join(' - ')
 

src/templates/watch.eta

@@ -218,6 +218,10 @@
   function initVideoLoading() {
     const video = document.getElementById('video-player');
     const loading = document.getElementById('video-loading');
+    let hasTheVideoErrored = false
+    const isIOSOrIPad = /iPad|iPhone|iPod/.test(navigator.userAgent) ||
+      (navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1);
+
     if (!video || !loading) return;
     loading?.classList.remove("hidden");
 
@@ -239,10 +243,17 @@
     video.addEventListener('pointerdown', hide);
 
     video.addEventListener('error', () => {
+      hasTheVideoErrored = true 
       loading.innerHTML = 'Video failed to load.';
+
+      if (isIOSOrIPad) {
+        loading.innerHTML += '<p style="font-size: medium;">It looks like you\'re on an iOS or iPadOS device. Apple devices without a hardware decoder can\'t play the kind of video Preservetube serves.</p>' +
+          '<p style="font-size: medium;">Please try using a different device.</p>'
+      } else {
         loading.innerHTML += '<p style="font-size: medium;">This is not supposed to happen. Please email me at admin@preservetube.com with as much debugging information.</p>' + 
           '<p style="font-size: medium;">Please include your browser console logs. <a style="font-style: italic;" href="https://support.happyfox.com/kb/article/882-accessing-the-browser-console-and-network-logs/">' + 
           'See here on how to access them.</a> Please note you might have to refresh the page for anything to show up.</p>'
+      }
     });
 
     // video already has data (i.e. cached)
@@ -251,7 +262,7 @@
     // add an extra message after 10s
     const FALLBACK_MS = 10000;
     const fallbackTimer = setTimeout(() => {
-      if (!loading.classList.contains('hidden')) {
+      if (!loading.classList.contains('hidden') && !hasTheVideoErrored) {
         loading.innerHTML = 'Taking longer than usual to load...';
         loading.innerHTML += '<p style="font-size: medium;">This might be due one of multiple reasons:</p>'
           + '<ol style="font-size: medium;"><li>This video is large. Depending on your browser, it might try loading the full thing at one time, which will slow things down.</li>'

src/utils/health.ts

@@ -0,0 +1,20 @@
+const healthStatus: Record<string, string> = {}
+
+async function checkHealth() {
+  const metadataServers: string[] = [process.env.METADATA!, process.env.ALTERNATIVE_METADATA!]
+  await Promise.all(metadataServers.map(async (m) => {
+    try {
+      const req = await fetch(m + '/health')
+      healthStatus[m] = req.ok ? 'healthy' : 'unhealthy'
+    } catch (_) {
+      healthStatus[m] = 'unhealthy'
+    }
+  }))
+
+  console.log(`checked health status - ${Object.entries(healthStatus).map(h => `${h[0].split('-')[1].split('.')[0]} ${h[1]}`).join(', ')}`)
+}
+
+checkHealth()
+setInterval(checkHealth, 5 * 60000)
+
+export default healthStatus