Pass all identity headers received to glance

There is an upcoming patch in nova which passes identity
headers to glance client. We want to ensure that these get
passed to glance, which in turn with help the no auth
option in glance.

Resolves bug 1200761

Change-Id: Ifbef582aa4e64a2e7a46db43a9cc6cf8c3531dbd

glanceclient/common/http.py

@@ -73,7 +73,12 @@ class HTTPClient(object):
         self.connection_kwargs = self.get_connection_kwargs(
             self.endpoint_scheme, **kwargs)
 
+        self.identity_headers = kwargs.get('identity_headers')
         self.auth_token = kwargs.get('token')
+        if self.identity_headers:
+            if self.identity_headers.get('X-Auth-Token'):
+                self.auth_token = self.identity_headers.get('X-Auth-Token')
+                del self.identity_headers['X-Auth-Token']
 
     @staticmethod
     def parse_endpoint(endpoint):
@@ -169,6 +174,10 @@ class HTTPClient(object):
         if self.auth_token:
             kwargs['headers'].setdefault('X-Auth-Token', self.auth_token)
 
+        if self.identity_headers:
+            for k, v in self.identity_headers.iteritems():
+                kwargs['headers'].setdefault(k, v)
+
         self.log_curl_request(method, url, kwargs)
         conn = self.get_connection()
 

tests/test_http.py

@@ -42,6 +42,39 @@ class TestClient(testtools.TestCase):
         super(TestClient, self).tearDown()
         self.mock.UnsetStubs()
 
+    def test_identity_headers_and_token(self):
+        identity_headers = {
+            'X-Auth-Token': 'auth_token',
+            'X-User-Id': 'user',
+            'X-Tenant-Id': 'tenant',
+            'X-Roles': 'roles',
+            'X-Identity-Status': 'Confirmed',
+            'X-Service-Catalog': 'service_catalog',
+        }
+        #with token
+        kwargs = {'token': u'fake-token',
+                  'identity_headers': identity_headers}
+        http_client_object = http.HTTPClient(self.endpoint, **kwargs)
+        self.assertEquals(http_client_object.auth_token, 'auth_token')
+        self.assertTrue(http_client_object.identity_headers.
+                        get('X-Auth-Token') is None)
+
+    def test_identity_headers_and_no_token_in_header(self):
+        identity_headers = {
+            'X-User-Id': 'user',
+            'X-Tenant-Id': 'tenant',
+            'X-Roles': 'roles',
+            'X-Identity-Status': 'Confirmed',
+            'X-Service-Catalog': 'service_catalog',
+        }
+        #without X-Auth-Token in identity headers
+        kwargs = {'token': u'fake-token',
+                  'identity_headers': identity_headers}
+        http_client_object = http.HTTPClient(self.endpoint, **kwargs)
+        self.assertEquals(http_client_object.auth_token, u'fake-token')
+        self.assertTrue(http_client_object.identity_headers.
+                        get('X-Auth-Token') is None)
+
     def test_connection_refused(self):
         """
         Should receive a CommunicationError if connection refused.