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# Copyright (c) 2012-2013 Red Hat, Inc.
#
# 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 os
try:
from webob.exc import HTTPBadRequest
except ImportError:
from swift.common.swob import HTTPBadRequest
import swift.common.constraints
import swift.common.ring as _ring
from gluster.swift.common import Glusterfs, ring
MAX_OBJECT_NAME_COMPONENT_LENGTH = 255
UNSUPPORTED_HEADERS = ['x-delete-at', 'x-delete-after']
def set_object_name_component_length(len=None):
global MAX_OBJECT_NAME_COMPONENT_LENGTH
if len:
MAX_OBJECT_NAME_COMPONENT_LENGTH = len
elif hasattr(swift.common.constraints, 'constraints_conf_int'):
MAX_OBJECT_NAME_COMPONENT_LENGTH = \
swift.common.constraints.constraints_conf_int(
'max_object_name_component_length', 255)
else:
MAX_OBJECT_NAME_COMPONENT_LENGTH = 255
return
set_object_name_component_length()
def get_object_name_component_length():
return MAX_OBJECT_NAME_COMPONENT_LENGTH
def validate_obj_name_component(obj):
if not obj:
return 'cannot begin, end, or have contiguous %s\'s' % os.path.sep
if len(obj) > MAX_OBJECT_NAME_COMPONENT_LENGTH:
return 'too long (%d)' % len(obj)
if obj == '.' or obj == '..':
return 'cannot be . or ..'
return ''
def validate_headers(req):
"""
Validate client header requests
:param req: Http request
"""
if not Glusterfs._ignore_unsupported_headers:
for unsupported_header in UNSUPPORTED_HEADERS:
if unsupported_header in req.headers:
return '%s headers are not supported' \
% ','.join(UNSUPPORTED_HEADERS)
return ''
# Save the original check object creation
__check_object_creation = swift.common.constraints.check_object_creation
__check_metadata = swift.common.constraints.check_metadata
def gluster_check_metadata(req, target_type, POST=True):
"""
:param req: HTTP request object
:param target_type: Value from POST passed to __check_metadata
:param POST: Only call __check_metadata on POST since Swift only
calls check_metadata on POSTs.
"""
ret = None
if POST:
ret = __check_metadata(req, target_type)
if ret is None:
bdy = validate_headers(req)
if bdy:
ret = HTTPBadRequest(body=bdy,
request=req,
content_type='text/plain')
return ret
# Define our new one which invokes the original
def gluster_check_object_creation(req, object_name):
"""
Check to ensure that everything is alright about an object to be created.
Monkey patches swift.common.constraints.check_object_creation, invoking
the original, and then adding an additional check for individual object
name components.
:param req: HTTP request object
:param object_name: name of object to be created
:raises HTTPRequestEntityTooLarge: the object is too large
:raises HTTPLengthRequered: missing content-length header and not
a chunked request
:raises HTTPBadRequest: missing or bad content-type header, or
bad metadata
"""
ret = __check_object_creation(req, object_name)
if ret is None:
for obj in object_name.split(os.path.sep):
reason = validate_obj_name_component(obj)
if reason:
bdy = 'Invalid object name "%s", component "%s" %s' \
% (object_name, obj, reason)
ret = HTTPBadRequest(body=bdy,
request=req,
content_type='text/plain')
if ret is None:
ret = gluster_check_metadata(req, 'object', POST=False)
return ret
# Replace the original checks with ours
swift.common.constraints.check_object_creation = gluster_check_object_creation
swift.common.constraints.check_metadata = gluster_check_metadata
# Replace the original check mount with ours
swift.common.constraints.check_mount = Glusterfs.mount
# Save the original Ring class
__Ring = _ring.Ring
# Replace the original Ring class
_ring.Ring = ring.Ring
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