799 lines
27 KiB
Python
799 lines
27 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
|
|
# Copyright 2013 IBM Corp.
|
|
# Copyright 2011 OpenStack Foundation
|
|
# All Rights Reserved.
|
|
#
|
|
# 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.
|
|
|
|
import math
|
|
import re
|
|
import routes
|
|
import time
|
|
|
|
import webob
|
|
|
|
from gceapi import exception
|
|
from gceapi.openstack.common import gettextutils
|
|
from gceapi.openstack.common.gettextutils import _
|
|
from gceapi.openstack.common import jsonutils
|
|
from gceapi.openstack.common import log as logging
|
|
from gceapi import wsgi
|
|
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
SUPPORTED_CONTENT_TYPES = (
|
|
'application/json',
|
|
'application/vnd.openstack.compute+json',
|
|
)
|
|
|
|
_MEDIA_TYPE_MAP = {
|
|
'application/vnd.openstack.compute+json': 'json',
|
|
'application/json': 'json',
|
|
}
|
|
|
|
_SANITIZE_KEYS = ['adminPass', 'admin_pass']
|
|
|
|
_SANITIZE_PATTERNS = [
|
|
re.compile(r'(adminPass\s*[=]\s*[\"\']).*?([\"\'])', re.DOTALL),
|
|
re.compile(r'(admin_pass\s*[=]\s*[\"\']).*?([\"\'])', re.DOTALL),
|
|
re.compile(r'(<adminPass>).*?(</adminPass>)', re.DOTALL),
|
|
re.compile(r'(<admin_pass>).*?(</admin_pass>)', re.DOTALL),
|
|
re.compile(r'([\"\']adminPass[\"\']\s*:\s*[\"\']).*?([\"\'])', re.DOTALL),
|
|
re.compile(r'([\"\']admin_pass[\"\']\s*:\s*[\"\']).*?([\"\'])', re.DOTALL)
|
|
]
|
|
|
|
|
|
class APIMapper(routes.Mapper):
|
|
def routematch(self, url=None, environ=None):
|
|
if url == "":
|
|
result = self._match("", environ)
|
|
return result[0], result[1]
|
|
return routes.Mapper.routematch(self, url, environ)
|
|
|
|
def connect(self, *args, **kargs):
|
|
# NOTE(vish): Default the format part of a route to only accept json
|
|
# and xml so it doesn't eat all characters after a '.'
|
|
# in the url.
|
|
kargs.setdefault('requirements', {})
|
|
if not kargs['requirements'].get('format'):
|
|
kargs['requirements']['format'] = 'json|xml'
|
|
return routes.Mapper.connect(self, *args, **kargs)
|
|
|
|
|
|
class ProjectMapper(APIMapper):
|
|
def resource(self, member_name, collection_name, **kwargs):
|
|
if 'parent_resource' not in kwargs:
|
|
kwargs['path_prefix'] = '{project_id}/'
|
|
else:
|
|
parent_resource = kwargs['parent_resource']
|
|
p_collection = parent_resource['collection_name']
|
|
p_member = parent_resource['member_name']
|
|
kwargs['path_prefix'] = '{project_id}/%s/:%s_id' % (p_collection,
|
|
p_member)
|
|
routes.Mapper.resource(self, member_name,
|
|
collection_name,
|
|
**kwargs)
|
|
|
|
|
|
class Request(webob.Request):
|
|
"""Add some OpenStack API-specific logic to the base webob.Request."""
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super(Request, self).__init__(*args, **kwargs)
|
|
self._extension_data = {'db_items': {}}
|
|
|
|
def cache_db_items(self, key, items, item_key='id'):
|
|
"""
|
|
Allow API methods to store objects from a DB query to be
|
|
used by API extensions within the same API request.
|
|
|
|
An instance of this class only lives for the lifetime of a
|
|
single API request, so there's no need to implement full
|
|
cache management.
|
|
"""
|
|
db_items = self._extension_data['db_items'].setdefault(key, {})
|
|
for item in items:
|
|
db_items[item[item_key]] = item
|
|
|
|
def get_db_items(self, key):
|
|
"""
|
|
Allow an API extension to get previously stored objects within
|
|
the same API request.
|
|
|
|
Note that the object data will be slightly stale.
|
|
"""
|
|
return self._extension_data['db_items'][key]
|
|
|
|
def get_db_item(self, key, item_key):
|
|
"""
|
|
Allow an API extension to get a previously stored object
|
|
within the same API request.
|
|
|
|
Note that the object data will be slightly stale.
|
|
"""
|
|
return self.get_db_items(key).get(item_key)
|
|
|
|
def cache_db_instances(self, instances):
|
|
self.cache_db_items('instances', instances, 'uuid')
|
|
|
|
def cache_db_instance(self, instance):
|
|
self.cache_db_items('instances', [instance], 'uuid')
|
|
|
|
def get_db_instances(self):
|
|
return self.get_db_items('instances')
|
|
|
|
def get_db_instance(self, instance_uuid):
|
|
return self.get_db_item('instances', instance_uuid)
|
|
|
|
def cache_db_flavors(self, flavors):
|
|
self.cache_db_items('flavors', flavors, 'flavorid')
|
|
|
|
def cache_db_flavor(self, flavor):
|
|
self.cache_db_items('flavors', [flavor], 'flavorid')
|
|
|
|
def get_db_flavors(self):
|
|
return self.get_db_items('flavors')
|
|
|
|
def get_db_flavor(self, flavorid):
|
|
return self.get_db_item('flavors', flavorid)
|
|
|
|
def best_match_content_type(self):
|
|
"""Determine the requested response content-type."""
|
|
if 'nova.best_content_type' not in self.environ:
|
|
# Calculate the best MIME type
|
|
content_type = None
|
|
|
|
# Check URL path suffix
|
|
parts = self.path.rsplit('.', 1)
|
|
if len(parts) > 1:
|
|
possible_type = 'application/' + parts[1]
|
|
if possible_type in SUPPORTED_CONTENT_TYPES:
|
|
content_type = possible_type
|
|
|
|
if not content_type:
|
|
content_type = self.accept.best_match(SUPPORTED_CONTENT_TYPES)
|
|
|
|
self.environ['nova.best_content_type'] = (content_type or
|
|
'application/json')
|
|
|
|
return self.environ['nova.best_content_type']
|
|
|
|
def get_content_type(self):
|
|
"""Determine content type of the request body.
|
|
|
|
Does not do any body introspection, only checks header
|
|
|
|
"""
|
|
if "Content-Type" not in self.headers:
|
|
return None
|
|
|
|
content_type = self.content_type
|
|
|
|
# NOTE(markmc): text/plain is the default for eventlet and
|
|
# other webservers which use mimetools.Message.gettype()
|
|
# whereas twisted defaults to ''.
|
|
if not content_type or content_type == 'text/plain':
|
|
return None
|
|
|
|
if content_type not in SUPPORTED_CONTENT_TYPES:
|
|
raise exception.InvalidContentType(content_type=content_type)
|
|
|
|
return content_type
|
|
|
|
def best_match_language(self):
|
|
"""Determine the best available language for the request.
|
|
|
|
:returns: the best language match or None if the 'Accept-Language'
|
|
header was not available in the request.
|
|
"""
|
|
if not self.accept_language:
|
|
return None
|
|
return self.accept_language.best_match(
|
|
gettextutils.get_available_languages('gceapi'))
|
|
|
|
|
|
class ActionDispatcher(object):
|
|
"""Maps method name to local methods through action name."""
|
|
|
|
def dispatch(self, *args, **kwargs):
|
|
"""Find and call local method."""
|
|
action = kwargs.pop('action', 'default')
|
|
action_method = getattr(self, str(action), self.default)
|
|
return action_method(*args, **kwargs)
|
|
|
|
def default(self, data):
|
|
raise NotImplementedError()
|
|
|
|
|
|
class TextDeserializer(ActionDispatcher):
|
|
"""Default request body deserialization."""
|
|
|
|
def deserialize(self, datastring, action='default'):
|
|
return self.dispatch(datastring, action=action)
|
|
|
|
def default(self, datastring):
|
|
return {}
|
|
|
|
|
|
class DictSerializer(ActionDispatcher):
|
|
"""Default request body serialization."""
|
|
|
|
def serialize(self, data, action='default'):
|
|
return self.dispatch(data, action=action)
|
|
|
|
def default(self, data):
|
|
return ""
|
|
|
|
|
|
class JSONDeserializer(TextDeserializer):
|
|
|
|
def _from_json(self, datastring):
|
|
try:
|
|
return jsonutils.loads(datastring)
|
|
except ValueError:
|
|
msg = _("cannot understand JSON")
|
|
raise exception.MalformedRequestBody(reason=msg)
|
|
|
|
def default(self, datastring):
|
|
return {'body': self._from_json(datastring)}
|
|
|
|
|
|
class JSONDictSerializer(DictSerializer):
|
|
"""Default JSON request body serialization."""
|
|
|
|
def default(self, data):
|
|
return jsonutils.dumps(data)
|
|
|
|
|
|
def serializers(**serializers):
|
|
"""Attaches serializers to a method.
|
|
|
|
This decorator associates a dictionary of serializers with a
|
|
method. Note that the function attributes are directly
|
|
manipulated; the method is not wrapped.
|
|
"""
|
|
|
|
def decorator(func):
|
|
if not hasattr(func, 'wsgi_serializers'):
|
|
func.wsgi_serializers = {}
|
|
func.wsgi_serializers.update(serializers)
|
|
return func
|
|
return decorator
|
|
|
|
|
|
def deserializers(**deserializers):
|
|
"""Attaches deserializers to a method.
|
|
|
|
This decorator associates a dictionary of deserializers with a
|
|
method. Note that the function attributes are directly
|
|
manipulated; the method is not wrapped.
|
|
"""
|
|
|
|
def decorator(func):
|
|
if not hasattr(func, 'wsgi_deserializers'):
|
|
func.wsgi_deserializers = {}
|
|
func.wsgi_deserializers.update(deserializers)
|
|
return func
|
|
return decorator
|
|
|
|
|
|
def response(code):
|
|
"""Attaches response code to a method.
|
|
|
|
This decorator associates a response code with a method. Note
|
|
that the function attributes are directly manipulated; the method
|
|
is not wrapped.
|
|
"""
|
|
|
|
def decorator(func):
|
|
func.wsgi_code = code
|
|
return func
|
|
return decorator
|
|
|
|
|
|
class ResponseObject(object):
|
|
"""Bundles a response object with appropriate serializers.
|
|
|
|
Object that app methods may return in order to bind alternate
|
|
serializers with a response object to be serialized. Its use is
|
|
optional.
|
|
"""
|
|
|
|
def __init__(self, obj, code=None, headers=None, **serializers):
|
|
"""Binds serializers with an object.
|
|
|
|
Takes keyword arguments akin to the @serializer() decorator
|
|
for specifying serializers. Serializers specified will be
|
|
given preference over default serializers or method-specific
|
|
serializers on return.
|
|
"""
|
|
|
|
self.obj = obj
|
|
self.serializers = serializers
|
|
self._default_code = 200
|
|
self._code = code
|
|
self._headers = headers or {}
|
|
self.serializer = None
|
|
self.media_type = None
|
|
|
|
def __getitem__(self, key):
|
|
"""Retrieves a header with the given name."""
|
|
|
|
return self._headers[key.lower()]
|
|
|
|
def __setitem__(self, key, value):
|
|
"""Sets a header with the given name to the given value."""
|
|
|
|
self._headers[key.lower()] = value
|
|
|
|
def __delitem__(self, key):
|
|
"""Deletes the header with the given name."""
|
|
|
|
del self._headers[key.lower()]
|
|
|
|
def _bind_method_serializers(self, meth_serializers):
|
|
"""Binds method serializers with the response object.
|
|
|
|
Binds the method serializers with the response object.
|
|
Serializers specified to the constructor will take precedence
|
|
over serializers specified to this method.
|
|
|
|
:param meth_serializers: A dictionary with keys mapping to
|
|
response types and values containing
|
|
serializer objects.
|
|
"""
|
|
|
|
# We can't use update because that would be the wrong
|
|
# precedence
|
|
for mtype, serializer in meth_serializers.items():
|
|
self.serializers.setdefault(mtype, serializer)
|
|
|
|
def get_serializer(self, content_type, default_serializers=None):
|
|
"""Returns the serializer for the wrapped object.
|
|
|
|
Returns the serializer for the wrapped object subject to the
|
|
indicated content type. If no serializer matching the content
|
|
type is attached, an appropriate serializer drawn from the
|
|
default serializers will be used. If no appropriate
|
|
serializer is available, raises InvalidContentType.
|
|
"""
|
|
|
|
default_serializers = default_serializers or {}
|
|
|
|
try:
|
|
mtype = _MEDIA_TYPE_MAP.get(content_type, content_type)
|
|
if mtype in self.serializers:
|
|
return mtype, self.serializers[mtype]
|
|
else:
|
|
return mtype, default_serializers[mtype]
|
|
except (KeyError, TypeError):
|
|
raise exception.InvalidContentType(content_type=content_type)
|
|
|
|
def preserialize(self, content_type, default_serializers=None):
|
|
"""Prepares the serializer that will be used to serialize.
|
|
|
|
Determines the serializer that will be used and prepares an
|
|
instance of it for later call. This allows the serializer to
|
|
be accessed by extensions for, e.g., template extension.
|
|
"""
|
|
|
|
mtype, serializer = self.get_serializer(content_type,
|
|
default_serializers)
|
|
self.media_type = mtype
|
|
self.serializer = serializer()
|
|
|
|
def attach(self, **kwargs):
|
|
"""Attach slave templates to serializers."""
|
|
|
|
if self.media_type in kwargs:
|
|
self.serializer.attach(kwargs[self.media_type])
|
|
|
|
def serialize(self, request, content_type, default_serializers=None):
|
|
"""Serializes the wrapped object.
|
|
|
|
Utility method for serializing the wrapped object. Returns a
|
|
webob.Response object.
|
|
"""
|
|
|
|
if self.serializer:
|
|
serializer = self.serializer
|
|
else:
|
|
_mtype, _serializer = self.get_serializer(content_type,
|
|
default_serializers)
|
|
serializer = _serializer()
|
|
|
|
response = webob.Response()
|
|
response.status_int = self.code
|
|
for hdr, value in self._headers.items():
|
|
response.headers[hdr] = str(value)
|
|
response.headers['Content-Type'] = content_type
|
|
if self.obj is not None:
|
|
response.body = serializer.serialize(self.obj)
|
|
|
|
return response
|
|
|
|
@property
|
|
def code(self):
|
|
"""Retrieve the response status."""
|
|
|
|
return self._code or self._default_code
|
|
|
|
@property
|
|
def headers(self):
|
|
"""Retrieve the headers."""
|
|
|
|
return self._headers.copy()
|
|
|
|
|
|
class ResourceExceptionHandler(object):
|
|
"""Context manager to handle Resource exceptions.
|
|
|
|
Used when processing exceptions generated by API implementation
|
|
methods (or their extensions). Converts most exceptions to Fault
|
|
exceptions, with the appropriate logging.
|
|
"""
|
|
|
|
def __enter__(self):
|
|
return None
|
|
|
|
def __exit__(self, ex_type, ex_value, ex_traceback):
|
|
if not ex_value:
|
|
return True
|
|
|
|
if isinstance(ex_value, exception.NotAuthorized):
|
|
raise Fault(webob.exc.HTTPForbidden(
|
|
explanation=ex_value.format_message()))
|
|
elif isinstance(ex_value, exception.Invalid):
|
|
raise Fault(exception.ConvertedException(
|
|
code=ex_value.code,
|
|
explanation=ex_value.format_message()))
|
|
|
|
# Under python 2.6, TypeError's exception value is actually a string,
|
|
# so test # here via ex_type instead:
|
|
# http://bugs.python.org/issue7853
|
|
elif issubclass(ex_type, TypeError):
|
|
exc_info = (ex_type, ex_value, ex_traceback)
|
|
LOG.error(_('Exception handling resource: %s') % ex_value,
|
|
exc_info=exc_info)
|
|
raise Fault(webob.exc.HTTPBadRequest())
|
|
elif isinstance(ex_value, Fault):
|
|
LOG.info(_("Fault thrown: %s"), unicode(ex_value))
|
|
raise ex_value
|
|
elif isinstance(ex_value, webob.exc.HTTPException):
|
|
LOG.info(_("HTTP exception thrown: %s"), unicode(ex_value))
|
|
raise Fault(ex_value)
|
|
|
|
# We didn't handle the exception
|
|
return False
|
|
|
|
|
|
def sanitize(msg):
|
|
if not (key in msg for key in _SANITIZE_KEYS):
|
|
return msg
|
|
|
|
for pattern in _SANITIZE_PATTERNS:
|
|
msg = re.sub(pattern, r'\1****\2', msg)
|
|
return msg
|
|
|
|
|
|
class Resource(wsgi.Application):
|
|
"""WSGI app that handles (de)serialization and controller dispatch.
|
|
|
|
WSGI app that reads routing information supplied by RoutesMiddleware
|
|
and calls the requested action method upon its controller. All
|
|
controller action methods must accept a 'req' argument, which is the
|
|
incoming wsgi.Request. If the operation is a PUT or POST, the controller
|
|
method must also accept a 'body' argument (the deserialized request body).
|
|
They may raise a webob.exc exception or return a dict, which will be
|
|
serialized by requested content type.
|
|
|
|
Exceptions derived from webob.exc.HTTPException will be automatically
|
|
wrapped in Fault() to provide API friendly error responses.
|
|
|
|
"""
|
|
|
|
def __init__(self, controller, **deserializers):
|
|
"""
|
|
:param controller: object that implement methods created by routes lib
|
|
"""
|
|
|
|
self.controller = controller
|
|
|
|
default_deserializers = dict(json=JSONDeserializer)
|
|
default_deserializers.update(deserializers)
|
|
|
|
self.default_deserializers = default_deserializers
|
|
self.default_serializers = dict(json=JSONDictSerializer)
|
|
|
|
def get_action_args(self, request_environment):
|
|
"""Parse dictionary created by routes library."""
|
|
|
|
# NOTE(Vek): Check for get_action_args() override in the
|
|
# controller
|
|
if hasattr(self.controller, 'get_action_args'):
|
|
return self.controller.get_action_args(request_environment)
|
|
|
|
try:
|
|
args = request_environment['wsgiorg.routing_args'][1].copy()
|
|
except (KeyError, IndexError, AttributeError):
|
|
return {}
|
|
|
|
try:
|
|
del args['controller']
|
|
except KeyError:
|
|
pass
|
|
|
|
try:
|
|
del args['format']
|
|
except KeyError:
|
|
pass
|
|
|
|
return args
|
|
|
|
def get_body(self, request):
|
|
try:
|
|
content_type = request.get_content_type()
|
|
except exception.InvalidContentType:
|
|
LOG.debug(_("Unrecognized Content-Type provided in request"))
|
|
return None, ''
|
|
|
|
if not content_type:
|
|
LOG.debug(_("No Content-Type provided in request"))
|
|
return None, ''
|
|
|
|
if len(request.body) <= 0:
|
|
LOG.debug(_("Empty body provided in request"))
|
|
return None, ''
|
|
|
|
return content_type, request.body
|
|
|
|
def deserialize(self, meth, content_type, body):
|
|
meth_deserializers = getattr(meth, 'wsgi_deserializers', {})
|
|
try:
|
|
mtype = _MEDIA_TYPE_MAP.get(content_type, content_type)
|
|
if mtype in meth_deserializers:
|
|
deserializer = meth_deserializers[mtype]
|
|
else:
|
|
deserializer = self.default_deserializers[mtype]
|
|
except (KeyError, TypeError):
|
|
raise exception.InvalidContentType(content_type=content_type)
|
|
|
|
if (hasattr(deserializer, 'want_controller')
|
|
and deserializer.want_controller):
|
|
return deserializer(self.controller).deserialize(body)
|
|
else:
|
|
return deserializer().deserialize(body)
|
|
|
|
@webob.dec.wsgify(RequestClass=Request)
|
|
def __call__(self, request):
|
|
"""WSGI method that controls (de)serialization and method dispatch."""
|
|
|
|
# Identify the action, its arguments, and the requested
|
|
# content type
|
|
action_args = self.get_action_args(request.environ)
|
|
action = action_args.pop('action', None)
|
|
content_type, body = self.get_body(request)
|
|
accept = request.best_match_content_type()
|
|
|
|
# NOTE(Vek): Splitting the function up this way allows for
|
|
# auditing by external tools that wrap the existing
|
|
# function. If we try to audit __call__(), we can
|
|
# run into troubles due to the @webob.dec.wsgify()
|
|
# decorator.
|
|
return self._process_stack(request, action, action_args,
|
|
content_type, body, accept)
|
|
|
|
def _process_stack(self, request, action, action_args,
|
|
content_type, body, accept):
|
|
"""Implement the processing stack."""
|
|
|
|
# Get the implementing method
|
|
try:
|
|
meth = self.get_method(request, action, content_type, body)
|
|
except (AttributeError, TypeError):
|
|
return Fault(webob.exc.HTTPNotFound())
|
|
except KeyError as ex:
|
|
msg = _("There is no such action: %s") % ex.args[0]
|
|
return Fault(webob.exc.HTTPBadRequest(explanation=msg))
|
|
except exception.MalformedRequestBody:
|
|
msg = _("Malformed request body")
|
|
return Fault(webob.exc.HTTPBadRequest(explanation=msg))
|
|
|
|
if body:
|
|
msg = _("Action: '%(action)s', body: "
|
|
"%(body)s") % {'action': action,
|
|
'body': unicode(body, 'utf-8')}
|
|
LOG.debug(sanitize(msg))
|
|
LOG.debug(_("Calling method %s") % str(meth))
|
|
|
|
# Now, deserialize the request body...
|
|
try:
|
|
if content_type:
|
|
contents = self.deserialize(meth, content_type, body)
|
|
else:
|
|
contents = {}
|
|
except exception.InvalidContentType:
|
|
msg = _("Unsupported Content-Type")
|
|
return Fault(webob.exc.HTTPBadRequest(explanation=msg))
|
|
except exception.MalformedRequestBody:
|
|
msg = _("Malformed request body")
|
|
return Fault(webob.exc.HTTPBadRequest(explanation=msg))
|
|
|
|
# Update the action args
|
|
action_args.update(contents)
|
|
|
|
response = None
|
|
try:
|
|
with ResourceExceptionHandler():
|
|
action_result = self.dispatch(meth, request, action_args)
|
|
except Fault as ex:
|
|
response = ex
|
|
|
|
if not response:
|
|
# No exceptions; convert action_result into a
|
|
# ResponseObject
|
|
resp_obj = None
|
|
if type(action_result) is dict or action_result is None:
|
|
resp_obj = ResponseObject(action_result)
|
|
elif isinstance(action_result, ResponseObject):
|
|
resp_obj = action_result
|
|
else:
|
|
response = action_result
|
|
|
|
# Run post-processing extensions
|
|
if resp_obj:
|
|
# Do a preserialize to set up the response object
|
|
serializers = getattr(meth, 'wsgi_serializers', {})
|
|
resp_obj._bind_method_serializers(serializers)
|
|
if hasattr(meth, 'wsgi_code'):
|
|
resp_obj._default_code = meth.wsgi_code
|
|
resp_obj.preserialize(accept, self.default_serializers)
|
|
response = resp_obj.serialize(request, accept,
|
|
self.default_serializers)
|
|
return response
|
|
|
|
def get_method(self, request, action, content_type, body):
|
|
"""Look up the action-specific method and its extensions."""
|
|
|
|
# Look up the method
|
|
if self.controller:
|
|
return getattr(self.controller, action)
|
|
else:
|
|
return getattr(self, action)
|
|
|
|
def dispatch(self, method, request, action_args):
|
|
"""Dispatch a call to the action-specific method."""
|
|
|
|
return method(req=request, **action_args)
|
|
|
|
|
|
class Fault(webob.exc.HTTPException):
|
|
"""Wrap webob.exc.HTTPException to provide API friendly response."""
|
|
|
|
_fault_names = {
|
|
400: "badRequest",
|
|
401: "unauthorized",
|
|
403: "forbidden",
|
|
404: "itemNotFound",
|
|
405: "badMethod",
|
|
409: "conflictingRequest",
|
|
413: "overLimit",
|
|
415: "badMediaType",
|
|
429: "overLimit",
|
|
501: "notImplemented",
|
|
503: "serviceUnavailable"}
|
|
|
|
def __init__(self, exception):
|
|
"""Create a Fault for the given webob.exc.exception."""
|
|
self.wrapped_exc = exception
|
|
for key, value in self.wrapped_exc.headers.items():
|
|
self.wrapped_exc.headers[key] = str(value)
|
|
self.status_int = exception.status_int
|
|
|
|
@webob.dec.wsgify(RequestClass=Request)
|
|
def __call__(self, req):
|
|
"""Generate a WSGI response based on the exception passed to ctor."""
|
|
|
|
user_locale = req.best_match_language()
|
|
# Replace the body with fault details.
|
|
code = self.wrapped_exc.status_int
|
|
fault_name = self._fault_names.get(code, "computeFault")
|
|
explanation = self.wrapped_exc.explanation
|
|
LOG.debug(_("Returning %(code)s to user: %(explanation)s"),
|
|
{'code': code, 'explanation': explanation})
|
|
|
|
explanation = gettextutils.translate(explanation, user_locale)
|
|
fault_data = {
|
|
fault_name: {
|
|
'code': code,
|
|
'message': explanation}}
|
|
if code == 413 or code == 429:
|
|
retry = self.wrapped_exc.headers.get('Retry-After', None)
|
|
if retry:
|
|
fault_data[fault_name]['retryAfter'] = retry
|
|
|
|
# 'code' is an attribute on the fault tag itself
|
|
metadata = {'attributes': {fault_name: 'code'}}
|
|
|
|
content_type = req.best_match_content_type()
|
|
serializer = {
|
|
'application/json': JSONDictSerializer(),
|
|
}[content_type]
|
|
|
|
self.wrapped_exc.body = serializer.serialize(fault_data)
|
|
self.wrapped_exc.content_type = content_type
|
|
|
|
return self.wrapped_exc
|
|
|
|
def __str__(self):
|
|
return self.wrapped_exc.__str__()
|
|
|
|
|
|
class RateLimitFault(webob.exc.HTTPException):
|
|
"""
|
|
Rate-limited request response.
|
|
"""
|
|
|
|
def __init__(self, message, details, retry_time):
|
|
"""
|
|
Initialize new `RateLimitFault` with relevant information.
|
|
"""
|
|
hdrs = RateLimitFault._retry_after(retry_time)
|
|
self.wrapped_exc = webob.exc.HTTPTooManyRequests(headers=hdrs)
|
|
self.content = {
|
|
"overLimit": {
|
|
"code": self.wrapped_exc.status_int,
|
|
"message": message,
|
|
"details": details,
|
|
"retryAfter": hdrs['Retry-After'],
|
|
},
|
|
}
|
|
|
|
@staticmethod
|
|
def _retry_after(retry_time):
|
|
delay = int(math.ceil(retry_time - time.time()))
|
|
retry_after = delay if delay > 0 else 0
|
|
headers = {'Retry-After': '%d' % retry_after}
|
|
return headers
|
|
|
|
@webob.dec.wsgify(RequestClass=Request)
|
|
def __call__(self, request):
|
|
"""
|
|
Return the wrapped exception with a serialized body conforming to our
|
|
error format.
|
|
"""
|
|
user_locale = request.best_match_language()
|
|
content_type = request.best_match_content_type()
|
|
metadata = {"attributes": {"overLimit": ["code", "retryAfter"]}}
|
|
|
|
self.content['overLimit']['message'] = \
|
|
gettextutils.translate(
|
|
self.content['overLimit']['message'],
|
|
user_locale)
|
|
self.content['overLimit']['details'] = \
|
|
gettextutils.translate(
|
|
self.content['overLimit']['details'],
|
|
user_locale)
|
|
|
|
serializer = {
|
|
'application/json': JSONDictSerializer(),
|
|
}[content_type]
|
|
|
|
content = serializer.serialize(self.content)
|
|
self.wrapped_exc.body = content
|
|
self.wrapped_exc.content_type = content_type
|
|
|
|
return self.wrapped_exc
|