If the data contains Multi-Byte character,it may be cut by the tcp packets,then the join function's result will contain some unintelligible text,because it turns the object in the array into string before the concat action.So,we should replace it with the Buffer class's member function concat.

The fix of this problem is in the commit 03af7b5.If the data contains Multi-Byte character,it may be cut by the tcp packets,then the join function's result will contain some unintelligible text,because it turns the object in the array into string before the concat action.

move initialization and finalization into before and after block