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# A Test Program for pipeTestService.py
#
# Install and start the Pipe Test service, then run this test
# either from the same machine, or from another using the "-s" param.
#
# Eg: pipeTestServiceClient.py -s server_name Hi There
# Should work.
from win32pipe import *
from win32file import *
from win32event import *
import pywintypes
import win32api
import winerror
import sys, os, traceback
verbose = 0
#def ReadFromPipe(pipeName):
# Could (Should?) use CallNamedPipe, but this technique allows variable size
# messages (whereas you must supply a buffer size for CallNamedPipe!
# hPipe = CreateFile(pipeName, GENERIC_WRITE, 0, None, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0)
# more = 1
# while more:
# hr = ReadFile(hPipe, 256)
# if hr==0:
# more = 0
# except win32api.error (hr, fn, desc):
# if hr==winerror.ERROR_MORE_DATA:
# data = dat
#
def CallPipe(fn, args):
ret = None
retryCount = 0
while retryCount < 8: # Keep looping until user cancels.
retryCount = retryCount + 1
try:
return fn(*args)
except win32api.error as exc:
if exc.winerror==winerror.ERROR_PIPE_BUSY:
win32api.Sleep(5000)
continue
else:
raise
raise RuntimeError("Could not make a connection to the server")
def testClient(server,msg):
if verbose:
print("Sending", msg)
data = CallPipe(CallNamedPipe, ("\\\\%s\\pipe\\PyPipeTest" % server, msg, 256, NMPWAIT_WAIT_FOREVER))
if verbose:
print("Server sent back '%s'" % data)
print("Sent and received a message!")
def testLargeMessage(server, size = 4096):
if verbose:
print("Sending message of size %d" % (size))
msg = "*" * size
data = CallPipe(CallNamedPipe, ("\\\\%s\\pipe\\PyPipeTest" % server, msg, 512, NMPWAIT_WAIT_FOREVER))
if len(data)-size:
print("Sizes are all wrong - send %d, got back %d" % (size, len(data)))
def stressThread(server, numMessages, wait):
try:
try:
for i in range(numMessages):
r = CallPipe(CallNamedPipe, ("\\\\%s\\pipe\\PyPipeTest" % server, "#" * 512, 1024, NMPWAIT_WAIT_FOREVER))
except:
traceback.print_exc()
print("Failed after %d messages" % i)
finally:
SetEvent(wait)
def stressTestClient(server, numThreads, numMessages):
import _thread
thread_waits = []
for t_num in range(numThreads):
# Note I could just wait on thread handles (after calling DuplicateHandle)
# See the service itself for an example of waiting for the clients...
wait = CreateEvent(None, 0, 0, None)
thread_waits.append(wait)
_thread.start_new_thread(stressThread, (server,numMessages, wait))
# Wait for all threads to finish.
WaitForMultipleObjects(thread_waits, 1, INFINITE)
def main():
import sys, getopt
server = "."
thread_count = 0
msg_count = 500
try:
opts, args = getopt.getopt(sys.argv[1:], 's:t:m:vl')
for o,a in opts:
if o=='-s':
server = a
if o=='-m':
msg_count = int(a)
if o=='-t':
thread_count = int(a)
if o=='-v':
global verbose
verbose = 1
if o=='-l':
testLargeMessage(server)
msg = " ".join(args).encode("mbcs")
except getopt.error as msg:
print(msg)
my_name = os.path.split(sys.argv[0])[1]
print("Usage: %s [-v] [-s server] [-t thread_count=0] [-m msg_count=500] msg ..." % my_name)
print(" -v = verbose")
print(" Specifying a value for -t will stress test using that many threads.")
return
testClient(server, msg)
if thread_count > 0:
print("Spawning %d threads each sending %d messages..." % (thread_count, msg_count))
stressTestClient(server, thread_count, msg_count)
if __name__=='__main__':
main()