From: Ben Darnell <ben@bendarnell.com>
Date: Sat, 26 May 2012 17:54:34 +0000 (-0700)
Subject: Override dict.copy in HTTPHeaders to return the correct type.
X-Git-Tag: v2.3.0~18
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f41306da0fc7cc07b45e685bb28f57448df3c332;p=thirdparty%2Ftornado.git

Override dict.copy in HTTPHeaders to return the correct type.

Closes #519.
---

diff --git a/tornado/httputil.py b/tornado/httputil.py
index 7d884e28b..2cbf677bf 100644
--- a/tornado/httputil.py
+++ b/tornado/httputil.py
@@ -154,6 +154,10 @@ class HTTPHeaders(dict):
         for k, v in dict(*args, **kwargs).iteritems():
             self[k] = v
 
+    def copy(self):
+        # default implementation returns dict(self), not the subclass
+        return HTTPHeaders(self)
+
     _NORMALIZED_HEADER_RE = re.compile(r'^[A-Z0-9][a-z0-9]*(-[A-Z0-9][a-z0-9]*)*$')
     _normalized_headers = {}