>>>>> "L" == Luke <luke(a)indy.net> writes:
L> none of these failed
Sorry Luke, I've been out sick since just about after our last email
exchange. Are you still having problems?
If you're getting that low-level bug report then there *must* either be
problems importing sys, or something that's causing the functions in
the except clause of run_main() to fail. I still suspect that logger
or multi are not getting instantiated correctly.
Please try this version of the driver script and see if that gives you
any more clues as to what's up. This will print error information to
whatever stderr is for your CGI scripts.
Let me know what you find out.
#! /usr/bin/env python
# Copyright (C) 1998 by the Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# Useful for debugging. When an error occurs, this attaches the file name to
# the exception string and re-raises (using the bogus Python 1.5 semantics)
# this may be unnecessary in Python 1.5.2
## realopen = open
## def open(filename, mode='r', bufsize=-1, realopen=realopen):
## return realopen(filename, mode, bufsize)
## except IOError, e:
## strerror = e.strerror + ': ' + filename
## e.strerror = strerror
## e.args = (e.args, strerror)
## # Python 1.5
## import sys
## raise e, None, sys.exc_info()
## # Python 1.5.1
## import __builtin__
## __builtin__.__dict__['open'] = open
# This standard driver script is used to run CGI programs, wrapped in code
# that catches errors, and displays them as HTML. This guarantees that
# (almost) any problems in the Mailman software doesn't result in a Web server
# error. It is much more helpful to generate and show a traceback, which the
# user could send to the administrator, than to display a server error and
# have to trudge through server logs.
# Note: this isn't 100% perfect! Here are some things that can go wrong that
# are not caught and reported as traceback-containing HTML:
# - This file could contain a syntax error. In that case, you would indeed
# get a Web server error since this file wouldn't even compile, and there's
# no way to catch that.
# - The sys module could be royally screwed. Either we couldn't import it, or
# it didn't have a sys.stderr attribute. Both those would indicate serious
# problems in the Python installation. These won't generate Web server
# errors, but neither will they give meaningful tracebacks.
# - We couldn't import the traceback module, or traceback.print_exc()
# failed. Same diagnosis and effect as with sys being broken.
# I consider all these pretty unlikely. Note that it is also possible that
# the environment variables wouldn't be printed, perhaps because os couldn't
# be imported or there was some problem with os.environ. Again, not likely.
# These will ensure that even if something between now and the
# creation of the real logger below fails, we can still get
# *something* meaningful
logger = sys.stderr
multi = sys.stderr
# insert the relative path to the parent of the Mailman package
# directory, so we can pick up the Utils module
# sys gets imported at module level below
# map stderr to a logger, if possible
from Mailman.Logging.StampedLogger import StampedLogger
from Mailman.Logging.MultiLogger import MultiLogger
logger = StampedLogger('error',
multi = MultiLogger(sys.__stdout__, logger)
# The name of the module to run is passed in argv. What we
# actually do is import the module named by argv that lives in the
# Mailman.Cgi package. That module must have a main() function, which
# we dig out and call.
scriptname = sys.argv
# See the reference manual for why we have to do things this way.
# Note that importing should have no side-effects!
pkg = __import__('Mailman.Cgi', globals(), locals(), [scriptname])
module = getattr(pkg, scriptname)
main = getattr(module, 'main')
# this is a valid way for the function to exit
def print_traceback(logger, multi):
<p><h3>We're sorry, we hit a bug!</h3>
<p>If you would like to help us identify the problem, please
email a copy of this page to the webmaster for this site with
a description of what happened. Thanks!
logger.write('[----- Traceback ------]\n')
# in normal situation, this will get logged to the MultiLogger created
# above, which will write the data to both the real live stdout, and
# the StampedLogger
multi.write('[failed to get a traceback]\n')
logger.write('[----- Environment Variables -----]\n')
for varname, value in os.environ.items():
print '<tr><td>', varname, '</td><td>', value, '</td></tr>'
logger.write('\t%s: %s\n' % (varname, value))
print '<p><hr>[environment variables are not available]'
# this is probably not strictly necessary since the script is exiting
# soon anyway
sys.stderr = sys.__stderr__
# Jeez, we couldn't even import sys, or sys didn't have a stderr
<p><h3>We're sorry, we hit a bug!</h3>
Mailman experienced a very low level failure and could not even generate
a useful traceback. Please report this to the Mailman administrator at