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From Mark Nottingham <m...@pobox.com>
Subject mod_autoindex/4520: mod_autoindex does not generate Last-Modified response headers
Date Thu, 03 Jun 1999 04:20:34 GMT

>Number:         4520
>Category:       mod_autoindex
>Synopsis:       mod_autoindex does not generate Last-Modified response headers
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    apache
>State:          open
>Class:          change-request
>Submitter-Id:   apache
>Arrival-Date:   Wed Jun  2 21:30:00 PDT 1999
>Originator:     mnot@pobox.com
>Release:        1.3.6
Because mod_autoindex does not generate LM headers, web caches cannot validate
these pages, making them essentially uncacheable (an Expires or a max-age can
be set, but that only does so much good; the index has to be re-downloaded in
full after it expires).

Because the module already does a stat for every file that it lists, it would
be relatively easy to compute a LM based on the most recently modified file that
it knows of (including HEADER, README, etc). 


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