in snowball_uploader_26-success.py [0:0]
def buf_fifo(buf):
tmp_buf = io.BytesIO() # added for FIFO operation
tmp_buf.write(buf.read()) # added for FIFO operation
#print ('3. before fifo, recv_buf_size: %s' % len(buf.getvalue()))
#print('3.before fifo, recv_buf_pos : %s' % buf.tell())
buf.seek(0,0)
buf.truncate(0)
tmp_buf.seek(0,0)
buf.write(tmp_buf.read())
return buf