Support max_age as an alias for max-age in set_cookie(**kwargs)

diff --git a/tornado/web.py b/tornado/web.py
index 384b26eec409b4b1f2b6efd1b81e3b4fdf1f4912..9e8c0d76d5cfdbe125d50f07bbfb4c647a5a61bf 100644 (file)
--- a/tornado/web.py
+++ b/tornado/web.py
@@ -367,6 +367,7 @@ class RequestHandler(object):
         if path:
             new_cookie[name]["path"] = path
         for k, v in kwargs.iteritems():
+            if k == 'max_age': k = 'max-age'
             new_cookie[name][k] = v
 
     def clear_cookie(self, name, path="/", domain=None):