[THRIFT-5191] When writing an irregular string, TZlibTransport cannot read cerrectlly the same length of strings

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 0.13.0
• Component/s: Python - Library

Environment

Environment : Ubuntu 18.04.4
version : 0.13.0

• Assignee: Unassigned
• Reporter: Zezeng Wang
• Created: 30/Apr/20 03:29
• Updated: 30/Apr/20 06:25

Description

When writing an irregular string, TZlibTransport cannot read cerrectlly the same length of strings
this may be a bug.

example:
import _import_local_thrift
from thrift.transport import TTransport
from thrift.transport import TZlibTransport

if _name_ == '_main_':
buff = TTransport.TMemoryBuffer()
trans = TTransport.TBufferedTransportFactory().getTransport(buff)
zlib_trans = TZlibTransport.TZlibTransport(trans)
data = 'abcefg'
zlib_trans.write(data.encode('utf-8'))
zlib_trans.flush()
value = buff.getvalue()
buff = TTransport.TMemoryBuffer(value)
trans = TTransport.TBufferedTransportFactory().getTransport(buff)
zlib_trans = TZlibTransport.TZlibTransport(trans)
data_r = zlib_trans.read(len(data))
print("write data:{}".format(data))
print("write data len :{}".format(len(data)))
print("read data:{}".format(data_r))
print("read data len:{}".format(len(data_r)))

test result: FALSE
Irregular string:

write data:abcefg
write data len :7
read data:b'abcd'
read data len:4

regular string: TRUE

write data:abcefgabcefg
write data len :14
read data:b'abcefgabcefg'
read data len:14