From 43770c51edf664af05622459f0e29f50b272de63 Mon Sep 17 00:00:00 2001
From: remm <remm@13f79535-47bb-0310-9956-ffa450edef68>
Date: Fri, 8 Dec 2006 01:37:24 +0000
Subject: [PATCH] - Based on Mark's patch. Ensure accept-language header
 conforms to RFC 2616 when accessed through   getLocale and friends, and
 ignore it if it doesn't.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc6.0.x/trunk@483769 13f79535-47bb-0310-9956-ffa450edef68
---
 java/org/apache/catalina/connector/Request.java | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/java/org/apache/catalina/connector/Request.java b/java/org/apache/catalina/connector/Request.java
index 2c22bac1d..33a34361a 100644
--- a/java/org/apache/catalina/connector/Request.java
+++ b/java/org/apache/catalina/connector/Request.java
@@ -2566,6 +2566,9 @@ public class Request
                     variant = "";
                 }
             }
+            if (!isAlpha(language) || !isAlpha(country) || !isAlpha(variant)) {
+                continue;
+            }
 
             // Add a new Locale to the list of Locales for this quality level
             Locale locale = new Locale(language, country, variant);
@@ -2594,4 +2597,15 @@ public class Request
 
     }
 
+    
+    protected static final boolean isAlpha(String value) {
+        for (int i = 0; i < value.length(); i++) {
+            char c = value.charAt(i);
+            if (!((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '1' && c <= '9'))) {
+                return false;
+            }
+        }
+        return true;
+    }
+    
 }
-- 
2.11.0