Telemetry: report uncaught errors

main/index.js

@@ -68,6 +68,13 @@ function init () {
 
     // To keep app startup fast, some code is delayed.
     setTimeout(delayedInit, config.DELAYED_INIT)
+
+    // Report uncaught exceptions
+    process.on('uncaughtException', (err) => {
+      console.error(err)
+      var errJSON = {message: err.message, stack: err.stack}
+      windows.main.dispatch('uncaughtError', 'main', errJSON)
+    })
   })
 
   app.once('ipcReady', function () {

renderer/main.js

@@ -95,9 +95,11 @@ function onState (err, _state) {
   // ...window visibility state.
   document.addEventListener('webkitvisibilitychange', onVisibilityChange)
 
-  sound.play('STARTUP')
+  // Log uncaught JS errors
+  window.addEventListener('error', (err) => telemetry.logUncaughtError('window', err.error), true)
 
   // Done! Ideally we want to get here < 500ms after the user clicks the app
+  sound.play('STARTUP')
   console.timeEnd('init')
 }
 
@@ -327,6 +329,9 @@ function dispatch (action, ...args) {
   if (action === 'setTitle') {
     state.window.title = args[0] /* title */
   }
+  if (action === 'uncaughtError') {
+    telemetry.logUncaughtError(args[0] /* process */, args[1] /* error */)
+  }
 
   // Update the virtual-dom, unless it's just a mouse move event
   if (action !== 'mediaMouseMoved' || showOrHidePlayerControls()) {
@@ -481,6 +486,8 @@ function setupIpc () {
   ipcRenderer.on('wt-audio-metadata', (e, ...args) => torrentAudioMetadata(...args))
   ipcRenderer.on('wt-server-running', (e, ...args) => torrentServerRunning(...args))
 
+  ipcRenderer.on('wt-uncaught-error', (e, err) => telemetry.logUncaughtError('webtorrent', err))
+
   ipcRenderer.send('ipcReady')
 }
 

renderer/webtorrent.js

@@ -63,6 +63,9 @@ function init () {
 
   ipc.send('ipcReadyWebTorrent')
 
+  window.addEventListener('error', (err) =>
+    ipc.send('wt-uncaught-error', {message: err.error.message, stack: err.error.stack}))
+
   setInterval(updateTorrentProgress, 1000)
 }
 

telemetry.js

@@ -47,7 +47,6 @@ function reset () {
 
 function postToServer () {
   // Serialize the telemetry summary
-  return console.log(JSON.stringify(telemetry, null, 2))
   var payload = new Buffer(JSON.stringify(telemetry), 'utf8')
 
   // POST to our server
@@ -111,14 +110,16 @@ function getApproxNumTorrents (state) {
 }
 
 // An uncaught error happened in the main process or one in one of the windows
-function logUncaughtError (err) {
+function logUncaughtError (process, err) {
-  var errString
+  var message, stack
   if (typeof err === 'string') {
-    errString = err
+    message = err
+    stack = ''
   } else {
-    errString = err.message + '\n' + err.stack
+    message = err.message
+    stack = err.stack
   }
-  telemetry.uncaughtErrors.push(errString)
+  telemetry.uncaughtErrors.push({process, message, stack})
 }
 
 // The user pressed play. It either worked, timed out, or showed the