Where is the environment variable

apache-2.2environment-variablesmod-dav-svnmod-wsgitrac

I have an apache2 server with active mod-wsgi, but I can't get the environment variable PYTHON_EGG_CACHE.
Here the important lines out of my virtualhost.conf:

    DAV svn
    SVNParentPath /var/svn
    SVNListParentPath Off

    WSGIProcessGroup sites
    WSGIApplicationGroup %{GLOBAL}
    SetEnv PYTHON_EGG_CACHE /var/trac/eggs

    AuthType Basic
    AuthName "Restricted SVN"
    AuthBasicProvider wsgi
    WSGIAuthUserScript /var/trac/cgi-bin/acctmgr_auth.wsgi
    Require valid-user

And here the acctmgr_auth.wsgi:

import os, sys
os.environ['PYTHON_EGG_CACHE'] = PYTHON_EGG_CACHE

from trac.env import open_environment, Environment

acct_mgr = None

def check_password(environ, user, password):
    global acct_mgr

    # Try loading the env from the global cache, addit it if needed
    environ['PYTHON_EGG_CACHE']
    env = open_environment(environ['trac.env_path'], use_cache=True)

    if acct_mgr is None:
        from acct_mgr.api import AccountManager
        acct_mgr = AccountManager

    if acct_mgr(env).check_password(user, password):
        return True
    else:
        return False

def groups_for_user(environ, user):
    return ['']

The single environ['PYTHON_EGG_CACHE'] is just a test, but I get a

KeyError: 'PYTHON_EGG_CACHE'

.

I also tried following, but I get the same error as above:

        RewriteCond ${lowercase:%{REQUEST_URI}} ^/svn/([^/]+)
        RewriteRule . - [E=trac.svn_path:/var/trac/envs/%1]

What is wrong?

Thanks for any advices.

EDIT: After some resarch I think I found the problem. The mod_dav is configured for the location /svn and it processes the request immediately, so the rewritecond and rewriterule will be ignored.
Is there any possibility to set environment variables with mod_dav?

Best Answer

This is how I did it on my django site, where the path is set in the apache file (as MY_PATH). Notice that I copy it into the os.environ variable.

import os, sys, django.core.handlers.wsgi
_application = django.core.handlers.wsgi.WSGIHandler()

def application(environ, start_response):

    path = environ['MY_PATH']
    if path not in sys.path:
        sys.path.append(path)


    os.environ['MY_PATH'] = environ['MY_PATH']
    from django.conf import settings
    settings.DEBUG = True

    return _application(environ, start_response)

Since I copied the environment variable to the os.environ, I can now use it (for example) in the settings file. Note that I have set all the os.environ variables before including the settings. In the settings I get it like so:

import os
PATH = os.environ['MY_PATH']
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