Make HTTPHeaders.__contains__() case-insensitive, like the rest of the object.

diff --git a/tornado/httputil.py b/tornado/httputil.py
index 013e4a1dac91089eea3fc9825dd769bd9b273685..8aec4b460b40420472fb888b9e6f0b44d3b64ef6 100644 (file)
--- a/tornado/httputil.py
+++ b/tornado/httputil.py
@@ -132,6 +132,10 @@ class HTTPHeaders(dict):
         dict.__delitem__(self, norm_name)
         del self._as_list[norm_name]
 
+    def __contains__(self, name):
+        norm_name = HTTPHeaders._normalize_name(name)
+        return dict.__contains__(self, norm_name)
+
     def get(self, name, default=None):
         return dict.get(self, HTTPHeaders._normalize_name(name), default)