enable CORS

Change-Id: Ia189bf1828997580056346cc943fdf682ce0da40

kb_server/config.py

@@ -12,6 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from kb_server.hooks.cors import CorsHook
 # Server Specific Configurations
 server = {
     'port': '8080',
@@ -29,6 +30,7 @@ app = {
     #     404: '/error/404',
     #     '__force_dict__': True
     # }
+    'hooks': [CorsHook()]
 }
 
 logging = {

kb_server/kb_server/hooks/cors.py

@@ -0,0 +1,25 @@
+# Copyright 2015 Cisco Systems, Inc.  All rights reserved.
+#
+#    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 pecan.hooks import PecanHook
+
+
+class CorsHook(PecanHook):
+
+    def after(self, state):
+        state.response.headers['Access-Control-Allow-Origin'] = '*'
+        state.response.headers['Access-Control-Allow-Methods'] = 'GET, POST, PUT, DELETE, OPTIONS'
+        state.response.headers['Access-Control-Allow-Headers'] = 'origin, authorization, accept'
+        if not state.response.headers['Content-Length']:
+            state.response.headers['Content-Length'] = str(len(state.response.body))