code: function (body) {
          var me = this;
          me.body = body;
          if (!Ext.data.flash.BinaryXhr.flashPluginActive) {
              Ext.globalEvents.addListener("flashready", me.onFlashReady, me);
          } else {
              this.onFlashReady();
          }
      }
docs: Initiate the request.
  @param {Array} body an array of byte values to send.