socket io io DataOutputStream io FilterOutputStream io io OutputStream wrappedoutputstream filteroutputstream default_buffer_size fbuffer dataoutputstream fdataoutputstream wrappedoutputstream outputstream stream stream default_buffer_size wrappedoutputstream outputstream stream buffersize stream fbuffer buffersize fdataoutputstream dataoutputstream stream write fbuffer fbuffer.length fdataoutputstream.writeint fbuffer.length super.out.write fbuffer fbuffer.length write offset length flush0 fdataoutputstream.writeint length super.out.write offset length flush flush0 super.out.flush close flush0 fdataoutputstream.writeint super.out.flush flush0 length length fdataoutputstream.writeint length super.out.write fbuffer length