145 lines
4.9 KiB
Python
145 lines
4.9 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2012 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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#
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# Copyright 2012 Nebula, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import logging
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import cloudfiles
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from django.conf import settings
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from django.utils.translation import ugettext as _
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from horizon import exceptions
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from horizon.api.base import url_for
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LOG = logging.getLogger(__name__)
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class SwiftAuthentication(object):
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""" Auth container in the format CloudFiles expects. """
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def __init__(self, storage_url, auth_token):
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self.storage_url = storage_url
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self.auth_token = auth_token
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def authenticate(self):
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return (self.storage_url, '', self.auth_token)
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def swift_api(request):
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endpoint = url_for(request, 'object-store')
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LOG.debug('Swift connection created using token "%s" and url "%s"'
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% (request.session['token'], endpoint))
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auth = SwiftAuthentication(endpoint, request.session['token'])
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return cloudfiles.get_connection(auth=auth)
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def swift_container_exists(request, container_name):
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try:
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swift_api(request).get_container(container_name)
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return True
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except cloudfiles.errors.NoSuchContainer:
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return False
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def swift_object_exists(request, container_name, object_name):
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container = swift_api(request).get_container(container_name)
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try:
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container.get_object(object_name)
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return True
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except cloudfiles.errors.NoSuchObject:
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return False
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def swift_get_containers(request, marker=None):
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limit = getattr(settings, 'API_RESULT_LIMIT', 1000)
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containers = swift_api(request).get_all_containers(limit=limit + 1,
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marker=marker)
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if(len(containers) > limit):
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return (containers[0:-1], True)
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else:
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return (containers, False)
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def swift_create_container(request, name):
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if swift_container_exists(request, name):
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raise exceptions.AlreadyExists(name, 'container')
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return swift_api(request).create_container(name)
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def swift_delete_container(request, name):
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swift_api(request).delete_container(name)
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def swift_get_objects(request, container_name, prefix=None, marker=None):
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limit = getattr(settings, 'API_RESULT_LIMIT', 1000)
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container = swift_api(request).get_container(container_name)
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objects = container.get_objects(prefix=prefix,
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marker=marker,
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limit=limit + 1)
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if(len(objects) > limit):
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return (objects[0:-1], True)
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else:
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return (objects, False)
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def swift_copy_object(request, orig_container_name, orig_object_name,
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new_container_name, new_object_name):
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try:
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# FIXME(gabriel): Cloudfiles currently fails at unicode in the
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# copy_to method, so to provide a better experience we check for
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# unicode here and pre-empt with an error message rather than
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# letting the call fail.
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str(orig_container_name)
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str(orig_object_name)
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str(new_container_name)
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str(new_object_name)
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except UnicodeEncodeError:
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raise exceptions.HorizonException(_("Unicode is not currently "
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"supported for object copy."))
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container = swift_api(request).get_container(orig_container_name)
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if swift_object_exists(request, new_container_name, new_object_name):
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raise exceptions.AlreadyExists(new_object_name, 'object')
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orig_obj = container.get_object(orig_object_name)
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return orig_obj.copy_to(new_container_name, new_object_name)
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def swift_upload_object(request, container_name, object_name, object_file):
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container = swift_api(request).get_container(container_name)
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obj = container.create_object(object_name)
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obj.send(object_file)
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return obj
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def swift_delete_object(request, container_name, object_name):
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container = swift_api(request).get_container(container_name)
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container.delete_object(object_name)
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def swift_get_object(request, container_name, object_name):
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container = swift_api(request).get_container(container_name)
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return container.get_object(object_name)
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def swift_get_object_data(request, container_name, object_name):
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container = swift_api(request).get_container(container_name)
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return container.get_object(object_name).stream()
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