From: Ben Darnell <ben@bendarnell.com>
Date: Sun, 8 Sep 2013 01:15:59 +0000 (-0400)
Subject: Set Connection: keep-alive header directly without going through set_header.
X-Git-Tag: v3.2.0b1~84
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=684fda2b32482f8d6e35e5514ea8e748c378c485;p=thirdparty%2Ftornado.git

Set Connection: keep-alive header directly without going through set_header.

set_header is not allowed in WebSocketHandler, but some proxies add
this header unconditionally.

Closes #897.
---

diff --git a/tornado/web.py b/tornado/web.py
index 5f8d6091b..fe0f2e403 100644
--- a/tornado/web.py
+++ b/tornado/web.py
@@ -250,7 +250,7 @@ class RequestHandler(object):
                 not self.request.connection.no_keep_alive):
             conn_header = self.request.headers.get("Connection")
             if conn_header and (conn_header.lower() == "keep-alive"):
-                self.set_header("Connection", "Keep-Alive")
+                self._headers["Connection"] = "Keep-Alive"
         self._write_buffer = []
         self._status_code = 200
         self._reason = httputil.responses[200]