Add jitter and retry logic to google drive userscript lookups

package.json

@@ -2,7 +2,7 @@
   "author": "Calvin Montgomery",
   "name": "CyTube",
   "description": "Online media synchronizer and chat",
-  "version": "3.23.3",
+  "version": "3.23.4",
   "repository": {
     "url": "http://github.com/calzoneman/sync"
   },

player/gdrive-player.coffee

@@ -6,9 +6,15 @@ window.GoogleDrivePlayer = class GoogleDrivePlayer extends VideoJSPlayer
         super(data)
 
     load: (data) ->
+        if not window.hasDriveUserscript and not data.meta.direct
+            window.promptToInstallDriveUserscript()
+        else if window.hasDriveUserscript
             window.maybePromptToUpgradeUserscript()
         if typeof window.getGoogleDriveMetadata is 'function'
-            window.getGoogleDriveMetadata(data.id, (error, metadata) =>
+            setTimeout(=>
+                backoffRetry((cb) ->
+                    window.getGoogleDriveMetadata(data.id, cb)
+                , (error, metadata) =>
                     if error
                         console.error(error)
                         alertBox = window.document.createElement('div')
@@ -18,6 +24,12 @@ window.GoogleDrivePlayer = class GoogleDrivePlayer extends VideoJSPlayer
                     else
                         data.meta.direct = metadata.videoMap
                         super(data)
-            )
+                , {
+                    maxTries: 3
+                    delay: 1000
+                    factor: 1.2
+                    jitter: 500
+                })
+            , Math.random() * 1000)
         else
             super(data)

player/update.coffee

@@ -31,14 +31,6 @@ window.loadMediaPlayer = (data) ->
             window.PLAYER = new VideoJSPlayer(data)
         catch e
             console.error e
-    else if data.type is 'gd'
-        try
-            if data.meta.html5hack or window.hasDriveUserscript
-                window.PLAYER = new GoogleDrivePlayer(data)
-            else
-                window.PLAYER = new GoogleDriveYouTubePlayer(data)
-        catch e
-            console.error e
     else if data.type of TYPE_MAP
         try
             window.PLAYER = TYPE_MAP[data.type](data)

www/js/player.js

@@ -679,10 +679,17 @@
     }
 
     GoogleDrivePlayer.prototype.load = function(data) {
+      if (!window.hasDriveUserscript && !data.meta.direct) {
+        window.promptToInstallDriveUserscript();
+      } else if (window.hasDriveUserscript) {
         window.maybePromptToUpgradeUserscript();
+      }
       if (typeof window.getGoogleDriveMetadata === 'function') {
-        return window.getGoogleDriveMetadata(data.id, (function(_this) {
-          return function(error, metadata) {
+        return setTimeout((function(_this) {
+          return function() {
+            return backoffRetry(function(cb) {
+              return window.getGoogleDriveMetadata(data.id, cb);
+            }, function(error, metadata) {
               var alertBox;
               if (error) {
                 console.error(error);
@@ -694,8 +701,14 @@
                 data.meta.direct = metadata.videoMap;
                 return GoogleDrivePlayer.__super__.load.call(_this, data);
               }
+            }, {
+              maxTries: 3,
+              delay: 1000,
+              factor: 1.2,
+              jitter: 500
+            });
           };
-        })(this));
+        })(this), Math.random() * 1000);
       } else {
         return GoogleDrivePlayer.__super__.load.call(this, data);
       }
@@ -1530,17 +1543,6 @@
         e = error1;
         return console.error(e);
       }
-    } else if (data.type === 'gd') {
-      try {
-        if (data.meta.html5hack || window.hasDriveUserscript) {
-          return window.PLAYER = new GoogleDrivePlayer(data);
-        } else {
-          return window.PLAYER = new GoogleDriveYouTubePlayer(data);
-        }
-      } catch (error1) {
-        e = error1;
-        return console.error(e);
-      }
     } else if (data.type in TYPE_MAP) {
       try {
         return window.PLAYER = TYPE_MAP[data.type](data);

www/js/util.js

@@ -3256,3 +3256,34 @@ function maybePromptToUpgradeUserscript() {
     alertBox.insertBefore(closeButton, alertBox.firstChild)
     document.getElementById('videowrap').appendChild(alertBox);
 }
+
+function backoffRetry(fn, cb, options) {
+    var jitter = options.jitter || 0;
+    var factor = options.factor || 1;
+    var isRetryable = options.isRetryable || function () { return true; };
+    var tries = 0;
+
+    function callback(error, result) {
+        tries++;
+        factor *= factor;
+        if (error) {
+            if (tries >= options.maxTries) {
+                console.log('Max tries exceeded');
+                cb(error, result);
+            } else if (isRetryable(error)) {
+                var offset = Math.random() * jitter;
+                var delay = options.delay * factor + offset;
+                console.log('Retrying on error: ' + error);
+                console.log('Waiting ' + delay + ' ms before retrying');
+
+                setTimeout(function () {
+                    fn(callback);
+                }, delay);
+            }
+        } else {
+            cb(error, result);
+        }
+    }
+
+    fn(callback);
+}