import unittest
import time
import threading
from pywin32_testutil import str2bytes# py3k-friendly helper
import win32pipe
import win32file
import win32event
import pywintypes
import winerror
import win32con
class PipeTests(unittest.TestCase):
pipename = "\\\\.\\pipe\\python_test_pipe"
def _serverThread(self, pipe_handle, event, wait_time):
# just do one connection and terminate.
hr = win32pipe.ConnectNamedPipe(pipe_handle)
self.failUnless(hr in (0, winerror.ERROR_PIPE_CONNECTED), "Got error code 0x%x" % (hr,))
hr, got = win32file.ReadFile(pipe_handle, 100)
self.failUnlessEqual(got, str2bytes("foo\0bar"))
time.sleep(wait_time)
win32file.WriteFile(pipe_handle, str2bytes("bar\0foo"))
pipe_handle.Close()
event.set()
def startPipeServer(self, event, wait_time = 0):
openMode = win32pipe.PIPE_ACCESS_DUPLEX
pipeMode = win32pipe.PIPE_TYPE_MESSAGE | win32pipe.PIPE_WAIT
sa = pywintypes.SECURITY_ATTRIBUTES()
sa.SetSecurityDescriptorDacl ( 1, None, 0 )
pipe_handle = win32pipe.CreateNamedPipe(self.pipename,
openMode,
pipeMode,
win32pipe.PIPE_UNLIMITED_INSTANCES,
0,
0,
2000,
sa)
threading.Thread(target=self._serverThread, args=(pipe_handle, event, wait_time)).start()
def testCallNamedPipe(self):
event = threading.Event()
self.startPipeServer(event)
got = win32pipe.CallNamedPipe(self.pipename,str2bytes("foo\0bar"), 1024, win32pipe.NMPWAIT_WAIT_FOREVER)
self.failUnlessEqual(got, str2bytes("bar\0foo"))
event.wait(5)
self.failUnless(event.isSet(), "Pipe server thread didn't terminate")
def testTransactNamedPipeBlocking(self):
event = threading.Event()
self.startPipeServer(event)
open_mode = win32con.GENERIC_READ | win32con.GENERIC_WRITE
hpipe = win32file.CreateFile(self.pipename,
open_mode,
0, # no sharing
None, # default security
win32con.OPEN_EXISTING,
0, # win32con.FILE_FLAG_OVERLAPPED,
None)
# set to message mode.
win32pipe.SetNamedPipeHandleState(
hpipe, win32pipe.PIPE_READMODE_MESSAGE, None, None)
hr, got = win32pipe.TransactNamedPipe(hpipe, str2bytes("foo\0bar"), 1024, None)
self.failUnlessEqual(got, str2bytes("bar\0foo"))
event.wait(5)
self.failUnless(event.isSet(), "Pipe server thread didn't terminate")
def testTransactNamedPipeBlockingBuffer(self):
# Like testTransactNamedPipeBlocking, but a pre-allocated buffer is
# passed (not really that useful, but it exercises the code path)
event = threading.Event()
self.startPipeServer(event)
open_mode = win32con.GENERIC_READ | win32con.GENERIC_WRITE
hpipe = win32file.CreateFile(self.pipename,
open_mode,
0, # no sharing
None, # default security
win32con.OPEN_EXISTING,
0, # win32con.FILE_FLAG_OVERLAPPED,
None)
# set to message mode.
win32pipe.SetNamedPipeHandleState(
hpipe, win32pipe.PIPE_READMODE_MESSAGE, None, None)
buffer = win32file.AllocateReadBuffer(1024)
hr, got = win32pipe.TransactNamedPipe(hpipe, str2bytes("foo\0bar"), buffer, None)
self.failUnlessEqual(got, str2bytes("bar\0foo"))
event.wait(5)
self.failUnless(event.isSet(), "Pipe server thread didn't terminate")
def testTransactNamedPipeAsync(self):
event = threading.Event()
overlapped = pywintypes.OVERLAPPED()
overlapped.hEvent = win32event.CreateEvent(None, 0, 0, None)
self.startPipeServer(event, 0.5)
open_mode = win32con.GENERIC_READ | win32con.GENERIC_WRITE
hpipe = win32file.CreateFile(self.pipename,
open_mode,
0, # no sharing
None, # default security
win32con.OPEN_EXISTING,
win32con.FILE_FLAG_OVERLAPPED,
None)
# set to message mode.
win32pipe.SetNamedPipeHandleState(
hpipe, win32pipe.PIPE_READMODE_MESSAGE, None, None)
buffer = win32file.AllocateReadBuffer(1024)
hr, got = win32pipe.TransactNamedPipe(hpipe, str2bytes("foo\0bar"), buffer, overlapped)
self.failUnlessEqual(hr, winerror.ERROR_IO_PENDING)
nbytes = win32file.GetOverlappedResult(hpipe, overlapped, True)
got = buffer[:nbytes]
self.failUnlessEqual(got, str2bytes("bar\0foo"))
event.wait(5)
self.failUnless(event.isSet(), "Pipe server thread didn't terminate")
if __name__ == '__main__':
unittest.main()
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