#2031: [PATCH] Catwalk can't create "/catwalk-session" when deploying using
mod_wsgi
-----------------------------+----------------------------------------------
Reporter: llucax | Owner: anonymous
Type: defect | Status: new
Priority: normal | Milestone: 1.1
Component: Toolbox.Catwalk | Version: 1.0.4.4
Severity: critical | Keywords: patch
-----------------------------+----------------------------------------------
Hi. I've just upgraded to Ubuntu Intrepid (8.10) which comes with TG
1.0.4.4 from an Ubuntu Hardy (8.04) which came with TG 1.0.2.2 and I think
I've hit a regression.
I've deployed my app using apache's mod_wsgi and I'm "mounting" Catwalk at
my root controller using something like this:
{{{
admin = identity.SecureObject(CatWalk(model),
identity.has_permission('admin'))
}}}
This worked perfectly in 1.0.2.2 (and still works perfectly in 1.0.4.4 if
I use the built-in cherrypy server running start-myproj.py) but now I get
this error:
{{{
[Wed Nov 12 20:44:36 2008] [error] [client 190.226.108.220] mod_wsgi
(pid=6351): Target WSGI script '/var/www/entregas/index.wsgi' cannot be
loaded as Python module.
[Wed Nov 12 20:44:36 2008] [error] [client 190.226.108.220] mod_wsgi
(pid=6351): Exception occurred processing WSGI script
'/var/www/entregas/index.wsgi'.
[Wed Nov 12 20:44:36 2008] [error] [client 190.226.108.220] Traceback
(most recent call last):
[Wed Nov 12 20:44:36 2008] [error] [client 190.226.108.220] File
"/var/www/entregas/index.wsgi", line 25, in <module>
[Wed Nov 12 20:44:36 2008] [error] [client 190.226.108.220] import
sercom.controllers
[Wed Nov 12 20:44:36 2008] [error] [client 190.226.108.220] File
"/var/lib/sercom/sercom/sercom/controllers.py", line 83, in <module>
[Wed Nov 12 20:44:36 2008] [error] [client 190.226.108.220] class
Root(controllers.RootController):
[Wed Nov 12 20:44:36 2008] [error] [client 190.226.108.220] File
"/var/lib/sercom/sercom/sercom/controllers.py", line 251, in Root
[Wed Nov 12 20:44:36 2008] [error] [client 190.226.108.220] admin =
identity.SecureObject(CatWalk(model), identity.has_permission('admin'))
[Wed Nov 12 20:44:36 2008] [error] [client 190.226.108.220] File
"/var/lib/python-
support/python2.5/turbogears/toolbox/catwalk/__init__.py", line 133, in
__init__
[Wed Nov 12 20:44:36 2008] [error] [client 190.226.108.220] "CatWalk
failed to load your model file.\\n" + str(e))
[Wed Nov 12 20:44:36 2008] [error] [client 190.226.108.220] ImportError:
CatWalk failed to load your model file.
[Wed Nov 12 20:44:36 2008] [error] [client 190.226.108.220] [Errno 13]
Permission denied: '/catwalk-session'
}}}
I digged a little and found that this exception was masked by this code
(on catwalk/__init__.py arround line 133 like the traceback says):
{{{
except Exception, e:
raise ImportError, (
"CatWalk failed to load your model file.\n" + str(e))
}}}
So I temporarily remove that try/except block and found the original
exception was thrown in the same file, arround line 600 in the
state_path() method):
{{{
597 catwalk_session_dir =
os.path.join(turbogears.util.get_package_name()
598 or '', 'catwalk-session')
599 catwalk_session_dir = os.path.abspath(catwalk_session_dir)
600 if not os.path.exists(catwalk_session_dir):
601 try:
602 os.mkdir(catwalk_session_dir)
603 except IOError, e:
604 msg = 'Fail to create session directory %s' % e
605 raise cherrypy.HTTPRedirect(turbogears.url('error',
msg=msg))
606 return os.path.join(catwalk_session_dir, 'session.pkl')
}}}
There are several problems here:
1. `turbogears.util.get_package_name()` returns nothing, so
`catwalk_session_dir` is
"/catwalk-session" in line 597. I made
`turbogears.util.get_package_name()` return "myproj"
adding a `package = "myproj"` in the config file, so I could get
`catwalk_session_dir` being
"myproj/catwalk-session". But this doesn't fix the problem.
2. line 599 makes `catwalk_session_dir` be "/myproj/catwalk-session",
because it looks like for
mod_wsgi the current working directory is "/".
3. In line 603, `OSError` should be catched too (permission denied is an
`OSError`).
Since I didn't knew how to fix this properly, I've made a simple change to
be able to specify via config file where the catwalk-session directory
should be:
{{{
--- /tmp/catwalk.__init__.py.orig 2008-11-12 21:08:38.000000000
-0200
+++ /var/lib/python-
support/python2.5/turbogears/toolbox/catwalk/__init__.py 2008-11-12
21:38:05.000000000 -0200
@@ -594,13 +594,15 @@ class CatWalk(turbogears.controllers.Con
Create a session directory if nescesary.
"""
- catwalk_session_dir =
os.path.join(turbogears.util.get_package_name()
- or '', 'catwalk-session')
+ catwalk_session_dir = turbogears.config.get('catwalk.session-
dir', None)
+ if catwalk_session_dir is None:
+ catwalk_session_dir =
os.path.join(turbogears.util.get_package_name()
+ or '', 'catwalk-session')
catwalk_session_dir = os.path.abspath(catwalk_session_dir)
if not os.path.exists(catwalk_session_dir):
try:
os.mkdir(catwalk_session_dir)
- except IOError, e:
+ except (IOError, OSError), e:
msg = 'Fail to create session directory %s' % e
raise cherrypy.HTTPRedirect(turbogears.url('error',
msg=msg))
return os.path.join(catwalk_session_dir, 'session.pkl')
}}}
Then I add:
{{{
catwalk.session-dir = "/path/to/my/catwalk-session"
}}}
And all works as expected.
--
Ticket URL: <http://trac.turbogears.org/ticket/2031>
TurboGears <http://www.turbogears.org/>
TurboGears front-to-back web development
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