I'm also still stumped by a geos.dll loading problem, which I haven't been able
to resolve.
I repost this now (originally sent last summer, but got no replies) since Ari
Simmons is having some sort of geos.dll loading problem.
Our problems may or may not be related, as his post did not mention Apache WSGI.
Anyone have any ideas?
Regards,
Dan
From: Harasty, Daniel J
Sent: Tuesday, July 16, 2013 11:03 AM
To: 'community@lists.gispython.org'
Subject: trouble with Shapely in Apache under WSGI
I realize that - strictly speaking - this is probably not a bug in Shapely, but
I would appreciate any advice.
I'd like to use Shapely in this environment:
* In a Python script implementing a WSGI application
* Deployed on Windows behind Apache httpd 2.x
Alas, I get this error logged by Apache:
* WindowsError: [Error 126] The specified module could not be found
The traceback reveals a problem loading the "geos_c.dll":
File "C:\\Python\\Python26\\lib\\site-packages\\shapely\\geos.py", line 76, in
<module>
_lgeos = CDLL("geos_c.dll") # DJH
File "C:\\Python\\Python26\\lib\\ctypes\\__init__.py", line 354, in __init__
self._handle = _dlopen(self._name, mode)
This is thrown immediately upon "import shapely.wkb", or any other Shapely
library that imports shapely.geos.
This has the smell of some sort of "path problem", but I have fiddled with
every possible PATH and PYTHONPATH setting both inside and outside of Apache.
I can repeat this in a diminutive app (not only my larger application), which
shows that even loading nothing else, I can trip this error. I'd be willing to
post/share my sample code and fragment from my Apache conf... but you'd have to
already have some familiarity with Apache and Python WSGI on Windows for it to
mean much.
Note that calling similar script (using Shapely) as a CGI (behind Apache) work
fine. So this sounds like a DLL loading problem peculiar to
Windows+Apache+mod_wsgi. (Not a Shapely or geos_c.dll bug, per se.) However,
none of my other Python+WSGI+Window+Apache scripts are having the same problem.
Any advice?
Thanks,
Dan Harasty
dhara...@appcomsci.com<mailto:dhara...@appcomsci.com>
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