I omitted a pretty significant point in my first mail in that I didn't
mention a hack/workaround to do the COM registration in HKCU as a
non-privileged login using standard registration code by overlaying HKCR
with HKCU\Software\Classes:
@contextmanager
def diddle_HKCR():
try:
hkey = RegOpenKey(HKEY_CURRENT_USER, r'''Software\Classes''')
RegOverridePredefKey(HKEY_CLASSES_ROOT, hkey)
yield
finally:
RegOverridePredefKey(HKEY_CLASSES_ROOT, None)
if __name__ == "__main__":
from comtypes.server.register import UseCommandLine
with diddle_HKCR():
UseCommandLine(Action)
This technique has worked with any pythoncom stuff I've done (which
admittedly is not all that much and all IDispatch-based)
> I would love to know how _ctypes.pyd is being called to create the
> inproc instance
I read through the ctypes source and see that DllGetClassObject imports
comtypes.server.inprocserver which ends up here:
try:
_debug("DllGetClassObject(clsid=%s, iid=%s)", clsid, iid)
cls = inproc_find_class(clsid)
if not cls:
return CLASS_E_CLASSNOTAVAILABLE
result = ClassFactory(cls).IUnknown_QueryInterface(None,
ctypes.pointer(iid), ppv)
_debug("DllGetClassObject() -> %s", result)
return result
except Exception:
_critical("DllGetClassObject", exc_info=True)
return E_FAIL
Noting that E_FAIL is defined as
E_FAIL = -2147467259 #0x80004005L
it looks like my code is generating an exception somewhere within
ClassFactory(cls).IUnknown_QueryInterface(None,ctypes.pointer(iid), ppv)
I put some side effects into my module code to create a file when the
module is loaded and I see the file being created as a
CLSCTX_INPROC_SERVER.
The LocalServer32 registration is:
C:\Python26\python.exe C:\work\foo\ext\mostl\action.py
However, when I try to create an instance via CLSCTX_LOCAL_SERVER then it
just re-registers the class. On looking through the source-code, it seems
like the option 'embedded' must be passed on the command-line but I do not
see that string anywhere in the registry in the
HKCU\CLID\guid\LocalServer32 value.
Apologies if I am mangling the terms horribly! I feel that I am missing
something really obvious and that if I could figure out how to get to the
debugging output that I could fix it up very quickly.
pjjH
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