Closes issue #3, fix decorator imports

src/djangopypi/djangopypi/decorators.py

@@ -1,11 +1,18 @@
-try:
-    from functools import update_wrapper, wraps
-except ImportError:
-    from django.utils.functional import update_wrapper, wraps
-
 from django.conf import settings
 from django.contrib.auth import login, REDIRECT_FIELD_NAME
-from django.utils.decorators import available_attrs
+from django.http import HttpResponseRedirect
+from django.utils.http import urlquote
+
+try:
+    from functools import update_wrapper, wraps, WRAPPER_ASSIGNMENTS
+except ImportError:
+    from django.utils.functional import update_wrapper, wraps, WRAPPER_ASSIGNMENTS
+
+try:
+    from django.utils.decorators import available_attrs
+except ImportError:
+    def available_attrs(fn):
+        return tuple(a for a in WRAPPER_ASSIGNMENTS if hasattr(fn, a))
 
 from djangopypi.http import HttpResponseUnauthorized, login_basic_auth
 
@@ -30,17 +37,6 @@ def basic_auth(view_func):
         return view_func(request, *args, **kwargs)
     return wraps(view_func, assigned=available_attrs(view_func))(_wrapped_view)
 
-try:
-    from functools import update_wrapper, wraps
-except ImportError:
-    from django.utils.functional import update_wrapper, wraps  # Python 2.4 fallback.
-
-from django.contrib.auth import REDIRECT_FIELD_NAME
-from django.http import HttpResponseRedirect
-from django.utils.decorators import available_attrs
-from django.utils.http import urlquote
-
-
 def user_owns_package(login_url=None, redirect_field_name=REDIRECT_FIELD_NAME):
     """
     Decorator for views that checks whether the user owns the currently requested