Received: (qmail 71214 invoked by uid 501); 25 Jan 2002 23:24:21 -0000
Message-Id: <20020125232421.71213.qmail@apache.org>
Date: 25 Jan 2002 23:24:21 -0000
From: Steven Devijver <apache@devijver.be>
Reply-To: apache@devijver.be
To: submit@bugz.apache.org
Subject: Response with "expires" header in RFC822 date format with zone + | - 4DIGIT format does not expire
X-Send-Pr-Version: 3.110

>Number:         9598
>Category:       mod_proxy
>Synopsis:       Response with "expires" header in RFC822 date format with zone + | - 4DIGIT format does not expire
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    apache
>State:          open
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Fri Jan 25 15:30:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     apache@devijver.be
>Release:        1.3.23
>Organization:
apache
>Environment:
Linux 2.2.19 (no patches), gcc 2.95.2 (no patches)
>Description:
When a response is cached by mod_proxy with the "expires" and "last-modified" headers is RFC822 date format with the zone field in the format ("+" / "-") 4DIGIT (e.g. "+0100") the cache response does not expire as expected. It does expire when the zone field is set to "GMT".
>How-To-Repeat:
Create a response with the "expires" and "last-modified" header in RFC822 date format with the zone field in the format ("+" / "-") 4DIGIT. E.g.:

Last-Modified: Sat, 26 Jan 2002 01:06:20 +0100
Expires: Sat, 26 Jan 2002 01:11:20 +0100

This respone will generate a HIT even when the timestamp of "expires" has passed. If you use GMT as your time zone the response will expire as expected. E.g.:

Last-Modified: Sat, 26 Jan 2002 00:06:20 GMT
Expires: Sat, 26 Jan 2002 00:11:20 GMT
>Fix:
Accept RFC822 compatible dates for these crucial mod_proxy header response fields as the RFC822 date format is commonly used by http servers and clients.
>Release-Note:
>Audit-Trail:
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