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84 lines
3.6 KiB
84 lines
3.6 KiB
6 years ago
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# Implements _both_ a connectable client, and a connectable server.
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#
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# Note that we cheat just a little - the Server in this demo is not created
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# via Normal COM - this means we can avoid registering the server.
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# However, the server _is_ accessed as a COM object - just the creation
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# is cheated on - so this is still working as a fully-fledged server.
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import pythoncom
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import win32com.server.util
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import win32com.server.connect
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from win32com.server.exception import Exception
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from pywin32_testutil import str2bytes
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# This is the IID of the Events interface both Client and Server support.
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IID_IConnectDemoEvents = pythoncom.MakeIID("{A4988850-49C3-11d0-AE5D-52342E000000}")
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# The server which implements
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# Create a connectable class, that has a single public method
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# 'DoIt', which echos to a single sink 'DoneIt'
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class ConnectableServer(win32com.server.connect.ConnectableServer):
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_public_methods_ = ["DoIt"] + win32com.server.connect.ConnectableServer._public_methods_
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_connect_interfaces_ = [IID_IConnectDemoEvents]
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# The single public method that the client can call on us
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# (ie, as a normal COM server, this exposes just this single method.
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def DoIt(self,arg):
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# Simply broadcast a notification.
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self._BroadcastNotify(self.NotifyDoneIt, (arg,))
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def NotifyDoneIt(self, interface, arg):
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interface.Invoke(1000, 0, pythoncom.DISPATCH_METHOD, 1, arg)
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# Here is the client side of the connection world.
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# Define a COM object which implements the methods defined by the
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# IConnectDemoEvents interface.
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class ConnectableClient:
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# This is another cheat - I _know_ the server defines the "DoneIt" event
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# as DISPID==1000 - I also know from the implementation details of COM
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# that the first method in _public_methods_ gets 1000.
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# Normally some explicit DISPID->Method mapping is required.
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_public_methods_ = ["OnDoneIt"]
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def __init__(self):
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self.last_event_arg = None
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# A client must implement QI, and respond to a query for the Event interface.
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# In addition, it must provide a COM object (which server.util.wrap) does.
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def _query_interface_(self, iid):
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import win32com.server.util
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# Note that this seems like a necessary hack. I am responding to IID_IConnectDemoEvents
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# but only creating an IDispatch gateway object.
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if iid==IID_IConnectDemoEvents: return win32com.server.util.wrap(self)
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# And here is our event method which gets called.
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def OnDoneIt(self, arg):
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self.last_event_arg = arg
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def CheckEvent(server, client, val, verbose):
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client.last_event_arg = None
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server.DoIt(val)
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if client.last_event_arg != val:
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raise RuntimeError("Sent %r, but got back %r" % (val, client.last_event_arg))
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if verbose:
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print("Sent and received %r" % val)
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# A simple test script for all this.
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# In the real world, it is likely that the code controlling the server
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# will be in the same class as that getting the notifications.
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def test(verbose=0):
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import win32com.client.dynamic, win32com.client.connect
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import win32com.server.policy
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server = win32com.client.dynamic.Dispatch(win32com.server.util.wrap(ConnectableServer()))
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connection = win32com.client.connect.SimpleConnection()
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client = ConnectableClient()
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connection.Connect(server, client, IID_IConnectDemoEvents)
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CheckEvent(server, client, "Hello", verbose)
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CheckEvent(server, client, str2bytes("Here is a null>\x00<"), verbose)
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CheckEvent(server, client, "Here is a null>\x00<", verbose)
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val = "test-\xe0\xf2" # 2 extended characters.
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CheckEvent(server, client, val, verbose)
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if verbose:
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print("Everything seemed to work!")
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# Aggressive memory leak checking (ie, do nothing!) :-) All should cleanup OK???
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if __name__=='__main__':
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test(1)
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