Hi
In M.Hammonds "python programming on win32" chapter 18 there is a pipe
service and a client [1] which use CallNamedPipe. I changed the service to
accept messages bigger than its buffer [2]. Does anybody know how to rewrite
the client with CreateFile method so it can accept bigger that buffer
messages too?
My attempt [3] which mimics
http://msdn.microsoft.com/en-us/library/aa365592(VS.85).aspx fails with
following message:
pywintypes.error: (121, 'WaitNamedPipe', 'The semaphore timeout period has
expired.')
Best regards,
Mani
[1] --------------------------------------------------------------
# PipeServiceClient.py
#
# A client for testing the PipeService.
#
# Usage:
#
# PipeServiceClient.py message
import win32pipe
import sys
import string
if __name__=='__main__':
message = string.join(sys.argv[1:])
pipeName = "\\\\.\\pipe\\PyPipeService"
data = win32pipe.CallNamedPipe(pipeName, message, 512, 0)
print "The service sent back:"
print data
[2]--------------------------------------------------------------
hr, data = win32file.ReadFile(pipeHandle, 256)
if (win32api.GetLastError() == winerror.ERROR_MORE_DATA):
t,t,remains = win32pipe.PeekNamedPipe(pipeHandle,0)
hr,d2 = win32file.ReadFile(pipeHandle, remains)
data = data + d2
[3]--------------------------------------------------------------
import win32pipe
import winerror
import pywintypes
import win32file
import win32security
import cPickle as pickle
from cPickle import HIGHEST_PROTOCOL
if __name__=='__main__':
message = pickle.dumps(range(1000),HIGHEST_PROTOCOL)
pipeName = "\\\\.\\pipe\\pyPipe"
saAttr = win32security.SECURITY_ATTRIBUTES()
saAttr.SetSecurityDescriptorDacl ( 1, None, 0 )
pipeHandle = win32file.CreateFile(pipeName,
win32file.GENERIC_READ | win32file.GENERIC_WRITE,
0,
None,
win32file.OPEN_EXISTING,
win32file.FILE_FLAG_OVERLAPPED|win32file.FILE_ATTRIBUTE_NORMAL,
None)
win32pipe.WaitNamedPipe(pipeName,2000)
win32pipe.SetNamedPipeHandleState(pipeHandle,
win32pipe.PIPE_READMODE_MESSAGE,
None,
None)
win32file.WriteFile(pipeHandle, message)
hr, data = win32file.ReadFile(pipeHandle, 256)
#TODO: read the remains of the message
print 'len(data):',len(data)
print "The service sent back:"
print pickle.loads(data)
_______________________________________________
python-win32 mailing list
[email protected]
http://mail.python.org/mailman/listinfo/python-win32
