[pywin32-bugs] [ pywin32-Bugs-745304 ] GetObject fails under Win32all-153

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Bugs item #745304, was opened at 2003-05-29 12:53
Message generated for change (Comment added) made by mhammond
You can respond by visiting: 
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Category: com
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: Andrew Asare (aka_kool)
Assigned to: Nobody/Anonymous (nobody)
Summary: GetObject fails under Win32all-153

Initial Comment:
GetObject fails to retrieve an instance of an object when 
a moniker is used.
For example, when working with WMI the following
will fail :-

>>> import win32com.client
>>> o = win32com.client.GetObject("winmgmts:")
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "C:\Python23\lib\site-
packages\win32com\client\__init__.py", line 73, in 
GetObject
    return Moniker(Pathname, clsctx)
  File "C:\Python23\lib\site-
packages\win32com\client\__init__.py", line 88, in 
Moniker
    moniker, i, bindCtx = 
pythoncom.MkParseDisplayName(Pathname)
com_error: (-2147221020, 'Invalid syntax', None, None)


I believe there is a bug in the implementation of 
MkParseDisplayName - possible corruption of passed 
moniker string.

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>Comment By: Mark Hammond (mhammond)
Date: 2003-07-12 23:08

Message:
Logged In: YES 
user_id=14198

Fixed in 154 and 155.

----------------------------------------------------------------------

Comment By: Ryan Groe (ryangroe)
Date: 2003-06-27 11:59

Message:
Logged In: YES 
user_id=773155

In pywin32\com\win32com\src\PythonCOM.cpp, in the 
function pythoncom_MkParseDisplayName, the variable 
displayName appears to get set to a narrow string (char *) 
even though it's declared as a wide string (WCHAR *).  When 
displayName is passed into the function MkParseDisplayName 
(as the second parameter), its type is correct (a wide 
character pointer), but the data it contains is wrong.

Here's a quick and really dirty fix:
1.  add the following somewhere near the top of 
PythonCOM.cpp:
	#include <comdef.h>
2.  change:
	hr = MkParseDisplayName(pBC, displayName, 
&chEaten, &pmk);
to:
	hr = MkParseDisplayName(pBC, (wchar_t *)(_bstr_t)
(char *)displayName, &chEaten, &pmk);


----------------------------------------------------------------------

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