From: Sebastien Boving <seb@google.com>
Date: Wed, 5 Jul 2017 17:04:33 +0000 (-0700)
Subject: Handle 1xx's along 204/304's
X-Git-Tag: v4.5.3~1^2~11
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7a23296100b7a796ae42df9b0c8e250b9a7a5cf1;p=thirdparty%2Ftornado.git

Handle 1xx's along 204/304's
---

diff --git a/tornado/web.py b/tornado/web.py
index 338fe0f05..e8d102b50 100644
--- a/tornado/web.py
+++ b/tornado/web.py
@@ -974,11 +974,11 @@ class RequestHandler(object):
                 if self.check_etag_header():
                     self._write_buffer = []
                     self.set_status(304)
-            if self._status_code in (204, 304):
+            if (self._status_code in (204, 304) or
+                (self._status_code >= 100 and self._status_code < 200)):
                 assert not self._write_buffer, "Cannot send body with %s" % self._status_code
                 self._clear_headers_for_304()
-            elif ("Content-Length" not in self._headers and
-                  (self._status_code < 100 or self._status_code >= 200)):
+            elif "Content-Length" not in self._headers:
                 content_length = sum(len(part) for part in self._write_buffer)
                 self.set_header("Content-Length", content_length)