From: Chinyue Chen <chinyue@gmail.com>
Date: Mon, 27 May 2013 03:57:26 +0000 (+0800)
Subject: Add check in case parsedate failed.
X-Git-Tag: v3.1.0~33^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=65acce1bb412fb23999dbd1c12d771af937f3bd9;p=thirdparty%2Ftornado.git

Add check in case parsedate failed.

email.utils.parsedate returns None if failed to parse date, add a check
to handle that.
---

diff --git a/tornado/web.py b/tornado/web.py
index 4940244e2..7ddd2fbe3 100644
--- a/tornado/web.py
+++ b/tornado/web.py
@@ -1877,9 +1877,10 @@ class StaticFileHandler(RequestHandler):
         ims_value = self.request.headers.get("If-Modified-Since")
         if ims_value is not None:
             date_tuple = email.utils.parsedate(ims_value)
-            if_since = datetime.datetime(*date_tuple[:6])
-            if if_since >= self.modified:
-                return True
+            if date_tuple is not None:
+                if_since = datetime.datetime(*date_tuple[:6])
+                if if_since >= self.modified:
+                    return True
 
         return False