Move accept header computations out of middleware

lib/util/middleware.py

@@ -14,29 +14,3 @@ class ExceptionLoggingMiddleware(object):
             log.exception(exception)
             return HttpResponseServerError("Server Error - Please try again later.")
 
-# From http://djangosnippets.org/snippets/1042/
-def parse_accept_header(accept):
-    """Parse the Accept header *accept*, returning a list with pairs of
-    (media_type, q_value), ordered by q values.
-    """
-    result = []
-    for media_range in accept.split(","):
-        parts = media_range.split(";")
-        media_type = parts.pop(0)
-        media_params = []
-        q = 1.0
-        for part in parts:
-            (key, value) = part.lstrip().split("=", 1)
-            if key == "q":
-                q = float(value)
-            else:
-                media_params.append((key, value))
-        result.append((media_type, tuple(media_params), q))
-    result.sort(lambda x, y: -cmp(x[2], y[2]))
-    return result
-
-class AcceptMiddleware(object):
-    def process_request(self, request):
-        accept = parse_accept_header(request.META.get("HTTP_ACCEPT", ""))
-        request.accept = accept
-        request.accepted_types = map(lambda (t, p, q): t, accept)

lib/util/views.py

@@ -66,3 +66,29 @@ def mitxhome(request):
     if settings.ENABLE_MULTICOURSE:
         return render_to_response("mitxhome.html", {})
     return info(request)
+
+# From http://djangosnippets.org/snippets/1042/
+def parse_accept_header(accept):
+    """Parse the Accept header *accept*, returning a list with pairs of
+    (media_type, q_value), ordered by q values.
+    """
+    result = []
+    for media_range in accept.split(","):
+        parts = media_range.split(";")
+        media_type = parts.pop(0)
+        media_params = []
+        q = 1.0
+        for part in parts:
+            (key, value) = part.lstrip().split("=", 1)
+            if key == "q":
+                q = float(value)
+            else:
+                media_params.append((key, value))
+        result.append((media_type, tuple(media_params), q))
+    result.sort(lambda x, y: -cmp(x[2], y[2]))
+    return result
+
+def accepts(request, media_type):
+    """Return whether this request has an Accept header that matches type"""
+    accept = parse_accept_header(request.META.get("HTTP_ACCEPT", ""))
+    return media_type in [t for (t, p, q) in accept]