Fix WebSSO when Keystone server hostname contains 'auth'

When using WebSSO, if the Keystone server has "auth" in
the hostname, the existing regular expression below is
problematic which causes a failed replacement.

Change-Id: I564d9af4be837f83f5ef1f8b00b794befafeeb7b
Closes-Bug: #1532032

openstack_auth/tests/tests.py

@@ -918,6 +918,25 @@ class OpenStackAuthTestsWebSSO(OpenStackAuthTestsMixin, test.TestCase):
         response = self.client.post(url, form_data)
         self.assertRedirects(response, settings.LOGIN_REDIRECT_URL)
 
+    def test_websso_login_with_auth_in_url(self):
+        settings.OPENSTACK_KEYSTONE_URL = 'http://auth.openstack.org:5000/v3'
+
+        projects = [self.data.project_one, self.data.project_two]
+        unscoped = self.data.federated_unscoped_access_info
+        token = unscoped.auth_token
+
+        form_data = {'token': token}
+        self._mock_unscoped_client_list_projects(unscoped, projects)
+        self._mock_scoped_client_for_tenant(unscoped, self.data.project_one.id)
+
+        self.mox.ReplayAll()
+
+        url = reverse('websso')
+
+        # POST to the page to log in.
+        response = self.client.post(url, form_data)
+        self.assertRedirects(response, settings.LOGIN_REDIRECT_URL)
+
 load_tests = load_tests_apply_scenarios
 
 

openstack_auth/utils.py

@@ -13,6 +13,7 @@
 
 import datetime
 import logging
+import re
 
 from django.conf import settings
 from django.contrib import auth
@@ -280,6 +281,16 @@ def fix_auth_url_version(auth_url):
     return auth_url
 
 
+def clean_up_auth_url(auth_url):
+    """Clean up the auth url to extract the exact Keystone URL"""
+
+    # NOTE(mnaser): This drops the query and fragment because we're only
+    #               trying to extract the Keystone URL.
+    scheme, netloc, path, query, fragment = urlparse.urlsplit(auth_url)
+    return urlparse.urlunsplit((
+        scheme, netloc, re.sub(r'/auth.*', '', path), '', ''))
+
+
 def get_token_auth_plugin(auth_url, token, project_id=None, domain_name=None):
     if get_keystone_version() >= 3:
         if domain_name:

openstack_auth/views.py

@@ -11,7 +11,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import logging
-import re
 
 import django
 from django.conf import settings
@@ -135,7 +134,7 @@ def login(request, template_name=None, extra_context=None, **kwargs):
 def websso(request):
     """Logs a user in using a token from Keystone's POST."""
     referer = request.META.get('HTTP_REFERER', settings.OPENSTACK_KEYSTONE_URL)
-    auth_url = re.sub(r'/auth.*', '', referer)
+    auth_url = utils.clean_up_auth_url(referer)
     token = request.POST.get('token')
     try:
         request.user = auth.authenticate(request=request, auth_url=auth_url,