21a14acba4
The Oslo libraries have moved all of their code out of the 'oslo' namespace package into per-library packages. The namespace package was retained during kilo for backwards compatibility, but will be removed by the liberty-2 milestone. This change removes the use of the namespace package, replacing it with the new package names. The patches in the libraries will be put on hold until application patches have landed, or L2, whichever comes first. At that point, new versions of the libraries without namespace packages will be released as a major version update. Please merge this patch, or an equivalent, before L2 to avoid problems with those library releases. Blueprint: remove-namespace-packages https://blueprints.launchpad.net/oslo-incubator/+spec/remove-namespace-packages Change-Id: I975592f3694be42d52685ebf606f6d3012caf1a8
132 lines
4.0 KiB
Python
132 lines
4.0 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
"""A middleware that turns exceptions into parsable string. Inspired by
|
|
Cinder's faultwrapper
|
|
"""
|
|
|
|
import sys
|
|
import traceback
|
|
|
|
from oslo_config import cfg
|
|
import webob
|
|
|
|
from murano.common import wsgi
|
|
from murano.packages import exceptions as pkg_exc
|
|
|
|
cfg.CONF.import_opt('debug', 'murano.openstack.common.log')
|
|
|
|
|
|
class HTTPExceptionDisguise(Exception):
|
|
"""Disguises HTTP exceptions so they can be handled by the webob fault
|
|
application in the wsgi pipeline.
|
|
"""
|
|
|
|
def __init__(self, exception):
|
|
self.exc = exception
|
|
self.tb = sys.exc_info()[2]
|
|
|
|
|
|
class Fault(object):
|
|
|
|
def __init__(self, error):
|
|
self.error = error
|
|
|
|
@webob.dec.wsgify(RequestClass=wsgi.Request)
|
|
def __call__(self, req):
|
|
if req.content_type == 'application/xml':
|
|
serializer = wsgi.XMLDictSerializer()
|
|
else:
|
|
serializer = wsgi.JSONDictSerializer()
|
|
resp = webob.Response(request=req)
|
|
default_webob_exc = webob.exc.HTTPInternalServerError()
|
|
resp.status_code = self.error.get('code', default_webob_exc.code)
|
|
serializer.default(resp, self.error)
|
|
return resp
|
|
|
|
|
|
class FaultWrapper(wsgi.Middleware):
|
|
"""Replace error body with something the client can parse."""
|
|
|
|
@classmethod
|
|
def factory(cls, global_conf, **local_conf):
|
|
def filter(app):
|
|
return cls(app)
|
|
return filter
|
|
|
|
error_map = {
|
|
'ValueError': webob.exc.HTTPBadRequest,
|
|
'LookupError': webob.exc.HTTPNotFound,
|
|
'PackageClassLoadError': webob.exc.HTTPBadRequest,
|
|
'PackageUILoadError': webob.exc.HTTPBadRequest,
|
|
'PackageLoadError': webob.exc.HTTPBadRequest,
|
|
'PackageFormatError': webob.exc.HTTPBadRequest,
|
|
}
|
|
|
|
def _map_exception_to_error(self, class_exception):
|
|
if class_exception == Exception:
|
|
return webob.exc.HTTPInternalServerError
|
|
|
|
if class_exception.__name__ not in self.error_map:
|
|
return self._map_exception_to_error(class_exception.__base__)
|
|
|
|
return self.error_map[class_exception.__name__]
|
|
|
|
def _error(self, ex):
|
|
|
|
trace = None
|
|
webob_exc = None
|
|
if isinstance(ex, HTTPExceptionDisguise):
|
|
# An HTTP exception was disguised so it could make it here
|
|
# let's remove the disguise and set the original HTTP exception
|
|
if cfg.CONF.debug:
|
|
trace = ''.join(traceback.format_tb(ex.tb))
|
|
ex = ex.exc
|
|
webob_exc = ex
|
|
|
|
ex_type = ex.__class__.__name__
|
|
|
|
full_message = unicode(ex)
|
|
if full_message.find('\n') > -1:
|
|
message, msg_trace = full_message.split('\n', 1)
|
|
else:
|
|
msg_trace = traceback.format_exc()
|
|
message = full_message
|
|
|
|
if isinstance(ex, pkg_exc.PackageException):
|
|
message = ex.message
|
|
|
|
if cfg.CONF.debug and not trace:
|
|
trace = msg_trace
|
|
|
|
if not webob_exc:
|
|
webob_exc = self._map_exception_to_error(ex.__class__)
|
|
|
|
error = {
|
|
'code': webob_exc.code,
|
|
'title': webob_exc.title,
|
|
'explanation': webob_exc.explanation,
|
|
'error': {
|
|
'message': message,
|
|
'type': ex_type,
|
|
'traceback': trace,
|
|
}
|
|
}
|
|
|
|
return error
|
|
|
|
def process_request(self, req):
|
|
try:
|
|
return req.get_response(self.application)
|
|
except Exception as exc:
|
|
return req.get_response(Fault(self._error(exc)))
|