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+# Copyright (c) 2012 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.
+
+# Noop Middleware that simply allows us to monkey patch the constraints
+import swift.plugins.constraints
+
+class Gluster(object):
+ """
+ Noop middleware for use with the proxy server to get paste.deploy to load
+ this middleware such that the plugin constraints monkey patch the common
+ constraints ahead of their use.
+ """
+ def __init__(self, app, conf):
+ self.app = app
+ self.conf = conf
+
+ def __call__(self, env, start_response):
+ return self.app(env, start_response)
+
+
+def filter_factory(global_conf, **local_conf):
+ """Returns a WSGI filter app for use with paste.deploy."""
+ conf = global_conf.copy()
+ conf.update(local_conf)
+
+ def gluster_filter(app):
+ return Gluster(app, conf)
+ return gluster_filter