Performance improvements

Supported SSL. Closes #71
Added setZeroTimeout. Now downloading files when tab in background and
improved performance
Multiple file parts download in parallel
TLDeserialization.fetchBytes returns typed array

app/js/lib/bin_utils.js

@@ -161,7 +161,8 @@ function convertToArrayBuffer(bytes) {
   if (bytes instanceof ArrayBuffer) {
     return bytes;
   }
-  if (bytes.buffer !== undefined) {
+  if (bytes.buffer !== undefined &&
+      bytes.buffer.byteLength == bytes.length * bytes.BYTES_PER_ELEMENT) {
     return bytes.buffer;
   }
   return bytesToArrayBuffer(bytes);

app/js/lib/mtproto.js

@@ -10,17 +10,27 @@ angular.module('izhukov.mtproto', ['izhukov.utils'])
 .factory('MtpDcConfigurator', function () {
   var dcOptions = Config.Modes.test
     ? [
-      {id: 1, host: '173.240.5.253', port: 80},
-      {id: 2, host: '149.154.167.40', port: 80},
-      {id: 3, host: '174.140.142.5', port: 80}
+      {id: 1, url: 'http://173.240.5.253'},
+      {id: 2, url: 'http://149.154.167.40'},
+      {id: 3, url: 'http://174.140.142.5'}
+    ]
+    : (location.protocol == 'https:'
+    ? [
+      {id: 1, url: 'https://pluto.web.telegram.org'},
+      {id: 2, url: 'https://venus.web.telegram.org'},
+      {id: 3, url: 'https://aurora.web.telegram.org'},
+      {id: 4, url: 'https://vesta.web.telegram.org'},
+      {id: 5, url: 'https://flora.web.telegram.org'}
     ]
     : [
-      {id: 1, host: '173.240.5.1',   port: 80},
-      {id: 2, host: '149.154.167.51', port: 80},
-      {id: 3, host: '174.140.142.6', port: 80},
-      {id: 4, host: '149.154.167.91', port: 80},
-      {id: 5, host: '149.154.171.5',   port: 80}
-    ];
+      {id: 1, url: 'http://173.240.5.1'},
+      {id: 2, url: 'http://149.154.167.51'},
+      {id: 3, url: 'http://174.140.142.6'},
+      {id: 4, url: 'http://149.154.167.91'},
+      {id: 5, url: 'http://149.154.171.5'}
+    ]);
+
+    var sslSubdomains = 'pluto,venus,aurora,vesta,flora';
 
   var chosenServers = {};
 
@@ -31,7 +41,7 @@ angular.module('izhukov.mtproto', ['izhukov.utils'])
       for (i = 0; i < dcOptions.length; i++) {
         dcOption = dcOptions[i];
         if (dcOption.id == dcID) {
-          chosenServer = dcOption.host + ':' + dcOption.port;
+          chosenServer = dcOption.url;
         }
       }
       chosenServers[dcID] = chosenServer;
@@ -197,7 +207,7 @@ angular.module('izhukov.mtproto', ['izhukov.utils'])
     var requestData = xhrSendBuffer ? resultBuffer : resultArray,
         requestPromise;
     try {
-      requestPromise =  $http.post('http://' + MtpDcConfigurator.chooseServer(dcID) + '/apiw1', requestData, {
+      requestPromise =  $http.post(MtpDcConfigurator.chooseServer(dcID) + '/apiw1', requestData, {
         responseType: 'arraybuffer',
         transformRequest: null
       });
@@ -791,7 +801,7 @@ angular.module('izhukov.mtproto', ['izhukov.utils'])
       longPoll: true
     }).then(function () {
       delete self.longPollPending;
-      $timeout(self.checkLongPoll.bind(self), 0);
+      setZeroTimeout(self.checkLongPoll.bind(self));
     }, function () {
       console.log('Long-poll failed');
     });
@@ -948,7 +958,7 @@ angular.module('izhukov.mtproto', ['izhukov.utils'])
 
 
   MtpNetworker.prototype.performSheduledRequest = function() {
-    // console.trace('sheduled', this.dcID, this.iii);
+    // console.log(dT(), 'sheduled', this.dcID, this.iii);
     if (this.offline) {
       console.log(dT(), 'Cancel sheduled');
       return false;
@@ -1126,7 +1136,9 @@ angular.module('izhukov.mtproto', ['izhukov.utils'])
   };
 
   MtpNetworker.prototype.getDecryptedMessage = function (msgKey, encryptedData) {
+    // console.log(dT(), 'get decrypted start');
     return this.getMsgKeyIv(msgKey, false).then(function (keyIv) {
+      // console.log(dT(), 'after msg key iv');
       return CryptoWorker.aesDecrypt(encryptedData, keyIv[0], keyIv[1]);
     });
   };
@@ -1162,7 +1174,7 @@ angular.module('izhukov.mtproto', ['izhukov.utils'])
           responseType: 'arraybuffer',
           transformRequest: null
         });
-        requestPromise =  $http.post('http://' + MtpDcConfigurator.chooseServer(self.dcID) + '/apiw1', requestData, options);
+        requestPromise =  $http.post(MtpDcConfigurator.chooseServer(self.dcID) + '/apiw1', requestData, options);
       } catch (e) {
         requestPromise = $q.reject(e);
       }
@@ -1206,6 +1218,7 @@ angular.module('izhukov.mtproto', ['izhukov.utils'])
         encryptedData = deserializer.fetchRawBytes(responseBuffer.byteLength - deserializer.getOffset(), true, 'encrypted_data');
 
     return this.getDecryptedMessage(msgKey, encryptedData).then(function (dataWithPadding) {
+      // console.log(dT(), 'after decrypt');
       var deserializer = new TLDeserialization(dataWithPadding, {mtproto: true});
 
       var salt = deserializer.fetchIntBytes(64, false, 'salt');
@@ -1216,6 +1229,7 @@ angular.module('izhukov.mtproto', ['izhukov.utils'])
 
       var messageBody = deserializer.fetchRawBytes(false, true, 'message_data');
 
+      // console.log(dT(), 'before hash');
       var hashData = convertToUint8Array(dataWithPadding).subarray(0, deserializer.getOffset());
 
       return CryptoWorker.sha1Hash(hashData).then(function (dataHash) {
@@ -1223,6 +1237,7 @@ angular.module('izhukov.mtproto', ['izhukov.utils'])
           console.warn(msgKey, bytesFromArrayBuffer(dataHash));
           throw new Error('server msgKey mismatch');
         }
+        // console.log(dT(), 'after hash check');
 
         var buffer = bytesToArrayBuffer(messageBody);
         var deserializerOptions = {
@@ -1243,7 +1258,7 @@ angular.module('izhukov.mtproto', ['izhukov.utils'])
               }
               if (this.offset != offset + result.bytes) {
                 console.warn(dT(), 'set offset', this.offset, offset, result.bytes);
-                console.log(dT(), result);
+                // console.log(dT(), result);
                 this.offset = offset + result.bytes;
               }
               // console.log(dT(), 'override message', result);
@@ -1262,6 +1277,7 @@ angular.module('izhukov.mtproto', ['izhukov.utils'])
         var deserializer = new TLDeserialization(buffer, deserializerOptions);
 
         var response = deserializer.fetchObject('', 'INPUT');
+        // console.log(dT(), 'after fetch');
 
         return {
           response: response,
@@ -1294,12 +1310,16 @@ angular.module('izhukov.mtproto', ['izhukov.utils'])
       return false;
     }
 
-    // console.log('shedule req', delay);
+    // console.log(dT(), 'shedule req', delay);
     // console.trace();
 
     $timeout.cancel(this.nextReqPromise);
-
+    if (delay > 0) {
       this.nextReqPromise = $timeout(this.performSheduledRequest.bind(this), delay || 0);
+    } else {
+      setZeroTimeout(this.performSheduledRequest.bind(this))
+    }
+
     this.nextReq = nextReq;
   };
 

app/js/lib/mtproto_wrapper.js

@@ -464,7 +464,7 @@ angular.module('izhukov.mtproto.wrapper', ['izhukov.utils', 'izhukov.mtproto'])
                 fileDownload: true,
                 createNetworker: true
               });
-            }, 6).then(function (result) {
+            }, 2).then(function (result) {
               writeFilePromise.then(function () {
                 if (canceled) {
                   return $q.when();

app/js/lib/ng_utils.js

@@ -33,7 +33,7 @@ angular.module('izhukov.utils', [])
 
 })
 
-.service('FileManager', function ($window, $timeout, $q) {
+.service('FileManager', function ($window, $q) {
 
   $window.URL = $window.URL || $window.webkitURL;
   $window.BlobBuilder = $window.BlobBuilder || $window.WebKitBlobBuilder || $window.MozBlobBuilder;
@@ -98,10 +98,10 @@ angular.module('izhukov.utils', [])
     else {
       try {
         var blob = blobConstruct([bytesToArrayBuffer(bytes)]);
+        fileWriter.write(blob);
       } catch (e) {
         deferred.reject(e);
       }
-      fileWriter.write(blob);
     }
 
     return deferred.promise;
@@ -150,7 +150,7 @@ angular.module('izhukov.utils', [])
               return false;
             }
             blobParts.push(blob);
-            $timeout(function () {
+            setZeroTimeout(function () {
               if (fakeFileWriter.onwriteend) {
                 fakeFileWriter.onwriteend();
               }
@@ -493,7 +493,7 @@ angular.module('izhukov.utils', [])
       finalizeTask = function (taskID, result) {
         var deferred = awaiting[taskID];
         if (deferred !== undefined) {
-          console.log(dT(), 'CW done');
+          // console.log(dT(), 'CW done');
           deferred.resolve(result);
           delete awaiting[taskID];
         }
@@ -524,7 +524,7 @@ angular.module('izhukov.utils', [])
   }
 
   function performTaskWorker (task, params, embed) {
-    console.log(dT(), 'CW start', task);
+    // console.log(dT(), 'CW start', task);
     var deferred = $q.defer();
 
     awaiting[taskID] = deferred;
@@ -562,7 +562,6 @@ angular.module('izhukov.utils', [])
     },
     aesEncrypt: function (bytes, keyBytes, ivBytes) {
       if (aesNaClEmbed) {
-        // aesEncryptSync(bytes, keyBytes, ivBytes);
         return performTaskWorker('aes-encrypt', {
           bytes: addPadding(convertToArrayBuffer(bytes)),
           keyBytes: convertToArrayBuffer(keyBytes),
@@ -575,7 +574,6 @@ angular.module('izhukov.utils', [])
     },
     aesDecrypt: function (encryptedBytes, keyBytes, ivBytes) {
       if (aesNaClEmbed) {
-        // aesDecryptSync(encryptedBytes, keyBytes, ivBytes);
         return performTaskWorker('aes-decrypt', {
           encryptedBytes: addPadding(convertToArrayBuffer(encryptedBytes)),
           keyBytes: convertToArrayBuffer(keyBytes),

app/js/lib/polyfill.js

@@ -96,3 +96,36 @@ if (!Function.prototype.bind) {
     return fBound;
   };
 }
+
+/* setZeroTimeout polyfill, from http://dbaron.org/log/20100309-faster-timeouts */
+(function(global) {
+  var timeouts = [];
+  var messageName = 'zero-timeout-message';
+
+  function setZeroTimeout(fn) {
+    timeouts.push(fn);
+    global.postMessage(messageName, '*');
+  }
+
+  function handleMessage(event) {
+    if (event.source == global && event.data == messageName) {
+      event.stopPropagation();
+      if (timeouts.length > 0) {
+        var fn = timeouts.shift();
+        fn();
+      }
+    }
+  }
+
+  global.addEventListener('message', handleMessage, true);
+
+  var originalSetTimeout = global.setTimeout;
+  global.setTimeout = function (callback, delay) {
+    if (!delay || delay <= 5) {
+      return setZeroTimeout(callback);
+    }
+    return originalSetTimeout(callback, delay);
+  };
+
+  global.setZeroTimeout = setZeroTimeout;
+})(this);

app/js/lib/tl_utils.js

@@ -402,10 +402,8 @@ TLDeserialization.prototype.fetchBytes = function (field) {
               (this.byteView[this.offset++] << 16);
   }
 
-  var bytes = [];
-  for (var i = 0; i < len; i++) {
-    bytes.push(this.byteView[this.offset++]);
-  }
+  var bytes = this.byteView.subarray(this.offset, this.offset + len);
+  this.offset += len;
 
   // Padding
   while (this.offset % 4) {