Revert "Revert "Fixed packet send callback design issue""

This reverts commit ead08d6e5b.

lib/socket.js

@@ -247,6 +247,13 @@ Socket.prototype.setupSendCallback = function () {
       if ('function' == typeof seqFn) {
         debug('executing send callback');
         seqFn(self.transport);
+      } else if (Array.isArray(seqFn)) {
+        debug('executing batch send callback');
+        for (var i in seqFn) {
+          if ('function' == typeof seqFn) {
+            seqFn[i](self.transport);
+          }
+        }
       }
     }
   });
@@ -288,9 +295,8 @@ Socket.prototype.sendPacket = function (type, data, callback) {
     this.writeBuffer.push(packet);
 
     //add send callback to object
-    if (callback) {
-      this.packetsFn.push(callback);
-    }
+    this.packetsFn.push(callback);
+
     this.flush();
   }
 };
@@ -309,6 +315,9 @@ Socket.prototype.flush = function () {
     this.server.emit('flush', this, this.writeBuffer);
     var wbuf = this.writeBuffer;
     this.writeBuffer = [];
+    if (!this.transport.supportsFraming) {
+      this.packetsFn = [this.packetsFn];
+    }
     this.transport.send(wbuf);
     this.emit('drain');
     this.server.emit('drain', this);

lib/transports/flashsocket.js

@@ -36,6 +36,14 @@ FlashSocket.prototype.__proto__ = WebSocket.prototype;
 
 FlashSocket.prototype.name = 'flashsocket';
 
+/**
+ * Advertise framing support.
+ *
+ * @api public
+ */
+
+FlashSocket.prototype.supportsFraming = true;
+
 /**
  * Listens for new configuration changes of the Manager
  * this way we can enable and disable the flash server.

lib/transports/websocket.js

@@ -55,6 +55,14 @@ WebSocket.prototype.name = 'websocket';
 
 WebSocket.prototype.handlesUpgrades = true;
 
+/**
+ * Advertise framing support.
+ *
+ * @api public
+ */
+
+WebSocket.prototype.supportsFraming = true;
+
 /**
  * Processes the incoming data.
  *