added versioning headers to the API

src/paperless/middleware.py

@@ -0,0 +1,18 @@
+from django.conf import settings
+
+from paperless import version
+
+
+class ApiVersionMiddleware:
+
+    def __init__(self, get_response):
+        self.get_response = get_response
+
+    def __call__(self, request):
+        response = self.get_response(request)
+        if request.user.is_authenticated:
+            versions = settings.REST_FRAMEWORK['ALLOWED_VERSIONS']
+            response['X-Api-Version'] = versions[len(versions)-1]
+            response['X-Version'] = ".".join([str(_) for _ in version.__version__])
+
+        return response

src/paperless/settings.py

@@ -115,6 +115,8 @@ REST_FRAMEWORK = {
     ],
     'DEFAULT_VERSIONING_CLASS': 'rest_framework.versioning.AcceptHeaderVersioning',
     'DEFAULT_VERSION': '1',
+    # Make sure these are ordered and that the most recent version appears
+    # last
     'ALLOWED_VERSIONS': ['1', '2']
 }
 
@@ -131,6 +133,7 @@ MIDDLEWARE = [
     'django.middleware.locale.LocaleMiddleware',
     'django.middleware.common.CommonMiddleware',
     'django.middleware.csrf.CsrfViewMiddleware',
+    'paperless.middleware.ApiVersionMiddleware',
     'django.contrib.auth.middleware.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',