Correct the resolving api logic in stat middleware

If the admin_port string is a substring of public_port string, all the
requests would be stated as 'admin' either their real dest port is
admin_port or public_port. It's due to the incorrect logic in stat
middleware.
For example, if public_port = 35000, admin_port = 5000, the first
judgement branch: "if str(CONF.admin_port) in host" in
StatsMiddleware::_resolve_api() would always return "True" either the
host port number equal to 5000 or 35000, so that the following judgement
branches would be incorrectly ignored.

Fixes bug #1189121
Change-Id: I1086b7d11f83dd218d66376f79747a1f720eb807

keystone/contrib/stats/core.py

@@ -121,9 +121,9 @@ def __init__(self, *args, **kwargs):
         return super(StatsMiddleware, self).__init__(*args, **kwargs)
 
     def _resolve_api(self, host):
-        if str(CONF.admin_port) in host:
+        if host.endswith(':%s' % (CONF.admin_port)):
             return 'admin'
-        elif str(CONF.public_port) in host:
+        elif host.endswith(':%s' % (CONF.public_port)):
             return 'public'
         else:
             # NOTE(dolph): I don't think this is actually reachable, but hey

tests/test_contrib_stats_core.py

@@ -0,0 +1,45 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2012 OpenStack LLC
+#
+# 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 keystone.contrib import stats
+
+from keystone import config
+from keystone import test
+
+
+CONF = config.CONF
+
+
+class StatsContribCore(test.TestCase):
+    def setUp(self):
+        super(StatsContribCore, self).setUp()
+        self.stats_middleware = stats.StatsMiddleware(None)
+
+    def test_admin_request(self):
+        host_admin = "127.0.0.1:%s" % CONF.admin_port
+        self.assertEqual("admin",
+                         self.stats_middleware._resolve_api(host_admin))
+
+    def test_public_request(self):
+        host_public = "127.0.0.1:%s" % CONF.public_port
+        self.assertEqual("public",
+                         self.stats_middleware._resolve_api(host_public))
+
+    def test_other_request(self):
+        host_public = "127.0.0.1:%s" % CONF.public_port
+        host_other = host_public + "1"
+        self.assertEqual(host_other,
+                         self.stats_middleware._resolve_api(host_other))