[jira] [Created] (THRIFT-5191) TZlibTransport cannot read strings of the same length when writing a string of length less than 3

[Zezeng Wang (Jira)]

Zezeng Wang created THRIFT-5191:
-----------------------------------

             Summary: TZlibTransport cannot read strings of the same length 
when writing a string of length less than 3
                 Key: THRIFT-5191
                 URL: https://issues.apache.org/jira/browse/THRIFT-5191
             Project: Thrift
          Issue Type: Bug
          Components: Python - Library
    Affects Versions: 0.13.0
         Environment: Environment : Ubuntu 18.04.4 
version : 0.13.0
            Reporter: Zezeng Wang


TZlibTransport cannot read strings of the same length when writing a string of 
length less than 3.
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 = 'aaa'
    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:
len <3:

write data:aa
write data len :2
read data:b'a'
read data len:1


len>3:

write data:aaa
write data len :3
read data:b'aaa'
read data len:3







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