From: Florian Best <best@univention.de>
Date: Fri, 1 Oct 2021 22:42:04 +0000 (+0200)
Subject: fix[web]: fix optional whitespace parsing of Accept-Language header
X-Git-Tag: v6.2.0b1~35^2~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=797e5a88b4299ca523de720aeb8b2e5a6a7e41f0;p=thirdparty%2Ftornado.git

fix[web]: fix optional whitespace parsing of Accept-Language header

HTTP allows OWS between parameters:
`Accept-Language: de-DE; q=0.1, en-US; q=0.2`
---

diff --git a/tornado/web.py b/tornado/web.py
index ddf1de746..b3efce998 100644
--- a/tornado/web.py
+++ b/tornado/web.py
@@ -1286,9 +1286,9 @@ class RequestHandler(object):
             locales = []
             for language in languages:
                 parts = language.strip().split(";")
-                if len(parts) > 1 and parts[1].startswith("q="):
+                if len(parts) > 1 and parts[1].strip().startswith("q="):
                     try:
-                        score = float(parts[1][2:])
+                        score = float(parts[1].strip()[2:])
                     except (ValueError, TypeError):
                         score = 0.0
                 else: