Trac fails on windows with mod_python

[Gytis Raciukaitis <gytis@…>]

The error reported looks like this:

[Wed Sep 28 11:15:20 2005] [error] [client 192.168.0.151] PythonHandler trac.web.modpython_frontend: Traceback (most recent call last):
[Wed Sep 28 11:15:20 2005] [error] [client 192.168.0.151] PythonHandler trac.web.modpython_frontend:   File "C:\\Python23\\Lib\\site-packages\\mod_python\\apache.py", line 299, in HandlerDispatch\n    result = object(req)
[Wed Sep 28 11:15:20 2005] [error] [client 192.168.0.151] PythonHandler trac.web.modpython_frontend:   File "C:\\Python23\\Lib\\site-packages\\trac\\web\\modpython_frontend.py", line 199, in handler\n    env = get_environment(mpr, project_opts)
[Wed Sep 28 11:15:20 2005] [error] [client 192.168.0.151] PythonHandler trac.web.modpython_frontend:   File "C:\\Python23\\Lib\\site-packages\\trac\\web\\main.py", line 338, in get_environment\n    return _open_environment(env_path, threaded)
[Wed Sep 28 11:15:20 2005] [error] [client 192.168.0.151] PythonHandler trac.web.modpython_frontend:   File "C:\\Python23\\Lib\\site-packages\\trac\\web\\main.py", line 51, in _open_environment\n    env_cache[env_path] = open_environment(env_path)
[Wed Sep 28 11:15:20 2005] [error] [client 192.168.0.151] PythonHandler trac.web.modpython_frontend:   File "C:\\Python23\\lib\\site-packages\\trac\\env.py", line 354, in open_environment\n    env = Environment(env_path)
[Wed Sep 28 11:15:20 2005] [error] [client 192.168.0.151] PythonHandler trac.web.modpython_frontend:   File "C:\\Python23\\lib\\site-packages\\trac\\env.py", line 77, in __init__\n    from trac.loader import load_components
[Wed Sep 28 11:15:20 2005] [error] [client 192.168.0.151] PythonHandler trac.web.modpython_frontend:   File "C:\\Python23\\lib\\site-packages\\trac\\loader.py", line 20, in ?\n    import pkg_resources
[Wed Sep 28 11:15:20 2005] [error] [client 192.168.0.151] PythonHandler trac.web.modpython_frontend:   File "c:\\python23\\lib\\site-packages\\setuptools-0.6a2-py2.3.egg\\pkg_resources.py", line 2146, in ?\n    working_set = WorkingSet()
[Wed Sep 28 11:15:20 2005] [error] [client 192.168.0.151] PythonHandler trac.web.modpython_frontend:   File "c:\\python23\\lib\\site-packages\\setuptools-0.6a2-py2.3.egg\\pkg_resources.py", line 343, in __init__\n    self.add_entry(entry)
[Wed Sep 28 11:15:20 2005] [error] [client 192.168.0.151] PythonHandler trac.web.modpython_frontend:   File "c:\\python23\\lib\\site-packages\\setuptools-0.6a2-py2.3.egg\\pkg_resources.py", line 358, in add_entry\n    for dist in find_distributions(entry, True):
[Wed Sep 28 11:15:20 2005] [error] [client 192.168.0.151] PythonHandler trac.web.modpython_frontend:   File "c:\\python23\\lib\\site-packages\\setuptools-0.6a2-py2.3.egg\\pkg_resources.py", line 1372, in find_on_path\n    for entry in os.listdir(path_item):
[Wed Sep 28 11:15:20 2005] [error] [client 192.168.0.151] PythonHandler trac.web.modpython_frontend: WindowsError: [Errno 123] The filename, directory name, or volume label syntax is incorrect: '\\\\\\\\*.*'

Looking deeper into it i found out that sys.path[0] is the problem, because it is initialized to "/". I fixed the problem locally by removing this element from sys.path in env.py.

[Gytis Raciukaitis <gytis@…>]

Crude fix to the problem

[Gytis Raciukaitis <gytis@…>]

I added crude fix to the problem due to several requests to do so. It may not be a perfect one since i'm not Python guru but it works at least.

[Emmanuel Blot]

(reverting back to the original settings)

[Matthew Good]

This seems like a setuptools bug, not something that is a Trac problem. If it still occurs with the latest setuptools it should be reported there.

[franetic]

It seems for me it is not (just?) a problem with the setuptools. After upgrading Trac (like from 092 to 093 or from 093 to 094) to a new version the apache logs the following errors on the first request:

[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend: Traceback (most recent call last):, referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\lib\\site-packages\\mod_python\\apache.py", line 299, in HandlerDispatch\n    result = object(req), referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend: Traceback (most recent call last):, referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\lib\\site-packages\\mod_python\\apache.py", line 299, in HandlerDispatch\n    result = object(req), referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\Lib\\site-packages\\trac\\web\\modpython_frontend.py", line 199, in handler\n    env = get_environment(mpr, project_opts), referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\Lib\\site-packages\\trac\\web\\main.py", line 335, in get_environment\n    return _open_environment(env_path, threaded), referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\Lib\\site-packages\\trac\\web\\main.py", line 51, in _open_environment\n    env_cache[env_path] = open_environment(env_path), referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\Lib\\site-packages\\trac\\env.py", line 374, in open_environment\n    env = Environment(env_path), referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\Lib\\site-packages\\trac\\web\\modpython_frontend.py", line 199, in handler\n    env = get_environment(mpr, project_opts), referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\Lib\\site-packages\\trac\\web\\main.py", line 335, in get_environment\n    return _open_environment(env_path, threaded), referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\Lib\\site-packages\\trac\\web\\main.py", line 51, in _open_environment\n    env_cache[env_path] = open_environment(env_path), referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\Lib\\site-packages\\trac\\env.py", line 374, in open_environment\n    env = Environment(env_path), referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\Lib\\site-packages\\trac\\env.py", line 85, in __init__\n    from trac.loader import load_components, referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend: ImportError: cannot import name load_components, referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\Lib\\site-packages\\trac\\env.py", line 85, in __init__\n    from trac.loader import load_components, referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend: ImportError: cannot import name load_components, referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend: Traceback (most recent call last):, referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\lib\\site-packages\\mod_python\\apache.py", line 299, in HandlerDispatch\n    result = object(req), referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\Lib\\site-packages\\trac\\web\\modpython_frontend.py", line 199, in handler\n    env = get_environment(mpr, project_opts), referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\Lib\\site-packages\\trac\\web\\main.py", line 335, in get_environment\n    return _open_environment(env_path, threaded), referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\Lib\\site-packages\\trac\\web\\main.py", line 51, in _open_environment\n    env_cache[env_path] = open_environment(env_path), referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\Lib\\site-packages\\trac\\env.py", line 374, in open_environment\n    env = Environment(env_path), referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend:   File "C:\\Python\\23\\Lib\\site-packages\\trac\\env.py", line 85, in __init__\n    from trac.loader import load_components, referer: http://pscm
[Mon Apr 03 12:03:39 2006] [error] [client xxx.xxx.xxx.xxx] PythonHandler trac.web.modpython_frontend: ImportError: cannot import name load_components, referer: http://pscm

The last ImportError repeats how many TracProject I have.

The index page falls back to the built-in one, the custom one fails to load probably due this error.

On the index page: name of the TracProject itself is correct, but the descrption is an error.

The first TracProject shows the error:

Error ([Errno 123] Die Syntax f? Dateinamen, Verzeichnisnamen oder die Datentr䧥rbezeichnung ist falsch: '\\\\*.*')

The rest shows:

Error (cannot import name load_components)

Applying the patch mentioned above to the env.py will fix and solve this issue.

So, it would be nice to incorporate this patch in an appropriate way into the source.

I run Trac on Win2k3 with mod_python.

[franetic]

Sorry, it does not fall back to the built-in index page… my bad. But the rest applies.

[Matthew Good]

The patch is a potential workaround, but I don't think it should be released with Trac because this problem needs to be fixed at its source. Either you have an invalid path in the PYTHONPATH environment variable, mod_python is modifying sys.path in an invalid way, or this needs fixed in setuptools. Please check your installation, and report the problem to mod_python or setuptools if necessary.

[anonymous]

Thanks for pointing this out… I've made a little search:

As your function handle(req) in modpython_frontend is called the request object already contains the trouble: req.hlist.directory: "∧\"

The function HandlerDispatch() in Callback class appends this invalid directory to the sys.path.

I had mod_python 3.1.3… upgrading to 3.2 line solves the problem. (tried 3.2.5b, 3.2.8)

[Emmanuel Blot]

We definitely need a SpamFilter that rejects comments with too many URLs…

[ebray]

Speaking of SpamFilter….

[Christian Boos]

The above spam entries had a karma of 1. min_karma should be set to 2 (it's currently set to 0), as legitimate entries with a karma of 1 are very uncommon.

[yvDQWzPHoN]

doors.txt;10;15