Fix issue #11 in the pecan adapter

tests/pecantest/test/tests/test_ws.py

@@ -126,4 +126,4 @@ class TestWS(FunctionalTest):
 
     def test_no_content_type_if_no_return_type(self):
         res = self.app.delete('/authors/4')
-        assert "Content-Type" not in res.headers
+        assert "Content-Type" not in res.headers, res.headers['Content-Type']

wsmeext/pecan.py

@@ -86,6 +86,11 @@ def wsexpose(*args, **kwargs):
                     pecan.response.status = 500
                 return data
 
+            if funcdef.return_type is None:
+                pecan.request.pecan['content_type'] = None
+                pecan.response.content_type = None
+                return ''
+
             return dict(
                 datatype=funcdef.return_type,
                 result=result