feat(controller): add X_DEIS_PLATFORM_VERSION header in response

Author: Matthew Fisher

controller/api/middleware.py

@@ -6,7 +6,7 @@
 from api import __version__
 
 
-class VersionMiddleware:
+class APIVersionMiddleware:
 
     def process_request(self, request):
         try:

controller/deis/middleware.py

@@ -0,0 +1,8 @@
+from deis import __version__
+
+
+class PlatformVersionMiddleware:
+
+    def process_response(self, request, response):
+        response['X_DEIS_PLATFORM_VERSION'] = __version__
+        return response

controller/deis/settings.py

@@ -107,7 +107,8 @@
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.contrib.auth.middleware.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
-    'api.middleware.VersionMiddleware',
+    'api.middleware.APIVersionMiddleware',
+    'deis.middleware.PlatformVersionMiddleware',
     # Uncomment the next line for simple clickjacking protection:
     # 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 )