Added a warning to paste.wsgilib.add_close

1 files changed, 10 insertions, 0 deletions

diff --git a/paste/wsgilib.py b/paste/wsgilib.py
index d83799a..70b1bc4 100644
--- a/paste/wsgilib.py
+++ b/paste/wsgilib.py
@@ -40,6 +40,7 @@ class add_close:
         self.app_iterable = app_iterable
         self.app_iter = iter(app_iterable)
         self.close_func = close_func
+        self._closed = False
 
     def __iter__(self):
         return self
@@ -48,10 +49,19 @@ class add_close:
         return self.app_iter.next()
 
     def close(self):
+        self._closed = True
         if hasattr(self.app_iterable, 'close'):
             self.app_iterable.close()
         self.close_func()
 
+    def __del__(self):
+        if not self._closed:
+            # We can't raise an error or anything at this stage
+            print >> sys.stderr, (
+                "Error: app_iter.close() was not called when finishing "
+                "WSGI request.  finalization function %s not called"
+                % self.close_func)
+
 def catch_errors(application, environ, start_response, error_callback,
                  ok_callback=None):
     """