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# Copyright (C) 2008 Guillermo Gonzalez <guillo.gonzo@gmail.com>
#
# 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
#
from loggerhead.controllers.error_ui import ErrorUI
class ErrorHandlerApp(object):
"""Class for WSGI error logging middleware."""
msg = " %s.%s: %s \n"
def __init__(self, application, **kwargs):
self.application = application
def __call__(self, environ, start_response):
try:
return self.application(environ, start_response)
except:
# test if exc_info has been set, in the case that
# the error is caused before BranchWSGGIApp middleware
if 'exc_info' in environ.keys() and 'branch' in environ.keys():
# Log and/or report any application errors
return self.handle_error(environ, start_response)
else:
# simply propagate the error, this is logged
# by paste.httpexceptions.TransLogger middleware
raise
def handle_error(self, environ, start_response):
"""Exception hanlder."""
self.log_error(environ)
return errapp(environ, start_response)
def log_error(self, environ):
exc_type, exc_object, exc_tb = environ['exc_info']
logger = environ['branch'].log
logger.exception(self.msg, exc_type.__module__,
exc_type.__name__, exc_object)
def errapp(environ, start_response):
"""Default (and trivial) error handling WSGI application."""
c = ErrorUI(environ['branch'], environ['exc_info'])
return c(environ, start_response)
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