93 lines
3.4 KiB
Python
93 lines
3.4 KiB
Python
# Copyright (c) 2013 OpenStack Foundation.
|
|
#
|
|
# 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.
|
|
|
|
from swift.common.swob import Request, Response
|
|
from swift.common.utils import register_swift_info
|
|
|
|
|
|
class CrossDomainMiddleware(object):
|
|
|
|
"""
|
|
Cross domain middleware used to respond to requests for cross domain
|
|
policy information.
|
|
|
|
If the path is /crossdomain.xml it will respond with an xml cross domain
|
|
policy document. This allows web pages hosted elsewhere to use client
|
|
side technologies such as Flash, Java and Silverlight to interact
|
|
with the Swift API.
|
|
|
|
To enable this middleware, add it to the pipeline in your proxy-server.conf
|
|
file. It should be added before any authentication (e.g., tempauth or
|
|
keystone) middleware. In this example ellipsis (...) indicate other
|
|
middleware you may have chosen to use::
|
|
|
|
[pipeline:main]
|
|
pipeline = ... crossdomain ... authtoken ... proxy-server
|
|
|
|
And add a filter section, such as::
|
|
|
|
[filter:crossdomain]
|
|
use = egg:swift#crossdomain
|
|
cross_domain_policy = <allow-access-from domain="*.example.com" />
|
|
<allow-access-from domain="www.example.com" secure="false" />
|
|
|
|
For continuation lines, put some whitespace before the continuation
|
|
text. Ensure you put a completely blank line to terminate the
|
|
cross_domain_policy value.
|
|
|
|
The cross_domain_policy name/value is optional. If omitted, the policy
|
|
defaults as if you had specified::
|
|
|
|
cross_domain_policy = <allow-access-from domain="*" secure="false" />
|
|
|
|
|
|
"""
|
|
|
|
def __init__(self, app, conf, *args, **kwargs):
|
|
self.app = app
|
|
self.conf = conf
|
|
default_domain_policy = '<allow-access-from domain="*"' \
|
|
' secure="false" />'
|
|
self.cross_domain_policy = self.conf.get('cross_domain_policy',
|
|
default_domain_policy)
|
|
|
|
def GET(self, req):
|
|
"""Returns a 200 response with cross domain policy information """
|
|
body = '<?xml version="1.0"?>\n' \
|
|
'<!DOCTYPE cross-domain-policy SYSTEM ' \
|
|
'"http://www.adobe.com/xml/dtds/cross-domain-policy.dtd" >\n' \
|
|
'<cross-domain-policy>\n' \
|
|
'%s\n' \
|
|
'</cross-domain-policy>' % self.cross_domain_policy
|
|
return Response(request=req, body=body.encode('utf-8'),
|
|
content_type="application/xml")
|
|
|
|
def __call__(self, env, start_response):
|
|
req = Request(env)
|
|
if req.path == '/crossdomain.xml' and req.method == 'GET':
|
|
return self.GET(req)(env, start_response)
|
|
else:
|
|
return self.app(env, start_response)
|
|
|
|
|
|
def filter_factory(global_conf, **local_conf):
|
|
conf = global_conf.copy()
|
|
conf.update(local_conf)
|
|
register_swift_info('crossdomain')
|
|
|
|
def crossdomain_filter(app):
|
|
return CrossDomainMiddleware(app, conf)
|
|
return crossdomain_filter
|