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Add a way of checking for installed IFilters #75

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
Most systems won't have the Adobe IFilter so we may want to tell a user
this somehow

Original issue reported on code.google.com by charliej...@gmail.com on 1 Nov 2007 at 4:10

GoogleCodeExporter commented 9 years ago 
AFAIK the com infrastructure uses registry entries to find a filter for a given 
file
type, so I guess we can check those entries. I don't know exactly where in the
registry to look, but presumably we can find out with a bit of googling/ 
trawling msdn.

Original comment by paul.x.r...@googlemail.com on 12 Nov 2007 at 6:55

GoogleCodeExporter commented 9 years ago 
Probably useful - http://msdn2.microsoft.com/en-us/library/aa965717(VS.85).aspx

Original comment by bano...@gmail.com on 6 Feb 2008 at 3:48

GoogleCodeExporter commented 9 years ago 
I -think- the way to do it is to look for the registry key:

  HKEY_CLASSES_ROOT/.ext/PersistentHandler

where .ext is the file extension in question (eg .pdf)

Original comment by bano...@gmail.com on 6 Feb 2008 at 4:13

GoogleCodeExporter commented 9 years ago 
Or, if the CLSID for the IFilter is known, check for

  HKEY_CLASSES_ROOT\CLSID\{CLSID of IFilter implementation}

Original comment by bano...@gmail.com on 6 Feb 2008 at 4:16

GoogleCodeExporter commented 9 years ago 
CLSIDs may change or there may be several for each file type, so the
PersistentHandler may be more successful. The other way is to attempt to load an
IFilter for the file type and see if it dies (check get_ifilter_for_file in
win32_ifilter.py). 

Currently the installer checks for whether some filters are available using the
PersistentHandler route (CurStepChanged in win32setup\setup_svc.py).

Original comment by lemurcon...@gmail.com on 6 Feb 2008 at 4:22

GoogleCodeExporter commented 9 years ago

Original comment by charliej...@gmail.com on 19 Aug 2009 at 3:28

GoogleCodeExporter commented 9 years ago

Original comment by charliej...@gmail.com on 28 Aug 2009 at 1:52

GoogleCodeExporter commented 9 years ago 
This has been in the installer for ages, not sure why it was still active.

Original comment by charliej...@gmail.com on 28 Aug 2009 at 2:03