mod_headers/5769: mod_headers won't append to Cache-Control header created by mod_expires

[Jason Priebe]

>Number:         5769
>Category:       mod_headers
>Synopsis:       mod_headers won't append to Cache-Control header created by 
>mod_expires
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    apache
>State:          open
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Wed Feb 16 13:50:01 PST 2000
>Closed-Date:
>Last-Modified:
>Originator:     [EMAIL PROTECTED]
>Release:        1.3.9
>Organization:
apache
>Environment:
RH Linux 5.2, kernel 2.0.36, i686
>Description:
At the server level, we set this directive for mod_headers:

Header append Cache-Control "public, must-revalidate"

then at the Directory level, we set these directives for mod_expires:

ExpiresActive On
ExpiresDefault "modification plus 4 hours"

Our goal is to get a Cache-Control header like this:

Cache-Control: max-age=13871, public, must-revalidate

However, the only Cache-Control header we get from the server is this:

Cache-Control: max-age=13871

I have tried two variations on this.  I have changed "append" to
"set".  Still no "public, must-revalidate" in the Cache-Control
header.  I then tried removing the mod_expires directives.  Then
I got:

Cache-Control: public, must-revalidate


>How-To-Repeat:
I found another user mentioning this problem on DejaNews.  He was
using the NT version, so I guess that it's fairly widespread.

Here are the modules I've got compiled in (the only non-standard
ones are usertrack, rewrite, headers, and expires):

Compiled-in modules:
  http_core.c
  mod_env.c
  mod_log_config.c
  mod_mime.c
  mod_negotiation.c
  mod_status.c
  mod_include.c
  mod_autoindex.c
  mod_dir.c
  mod_cgi.c
  mod_asis.c
  mod_imap.c
  mod_actions.c
  mod_userdir.c
  mod_alias.c
  mod_rewrite.c
  mod_access.c
  mod_auth.c
  mod_expires.c
  mod_headers.c
  mod_usertrack.c
  mod_setenvif.c
>Fix:

>Release-Note:
>Audit-Trail:
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