add warning for when content_type mismatch

pecan/core.py

@@ -387,6 +387,12 @@ class Pecan(object):
             request.pecan['content_type'] = cfg.get('content_type', 'text/html')
         elif cfg.get('content_type') is not None and \
             request.pecan['content_type'] not in cfg.get('content_types', {}):
+
+            print "Controller '%s' defined does not support content_type '%s'. Supported type(s): %s" % (
+                controller.__name__,
+                request.pecan['content_type'],
+                cfg.get('content_types', {}).keys()
+                )
             raise exc.HTTPNotFound
         
         # get a sorted list of hooks, by priority