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Posted to modproxy-dev@apache.org by Graham Leggett <mi...@sharp.fm> on 2002/09/01 17:03:45 UTC
Re: Siteminder/mod_proxy issues
Martijn Schoemaker wrote:
> I put back an old libproxy.so from our (working) version shipped
> with apache 1.3.12 into apach 1.3.26. And when I sniff the whole
> kit'n kaboodle again I don't see the cookie duplication! If I put
> back the version of 1.3.26, I DO see cookie duplication!
If you can sniff the connection both sides (turn off SSL for testing, or
use something like openssl s_client and speak HTTP directly to the
server) then we can see what is happening on either side.
Regards,
Graham
--
-----------------------------------------
minfrin@sharp.fm
"There's a moon
over Bourbon Street
tonight..."
Re: Siteminder/mod_proxy issues
Posted by Graham Leggett <mi...@sharp.fm>.
Martijn Schoemaker wrote:
> Ok guys, I think I found the problem.
> Now I think this is enough proof to say that the 'old' manual
> ap_overlay_tables() line (539 in my proxy_http.c file) can be
> (ehm MUST be) removed from the code since is now causes dup-
> lication of headers which again triggers a lot of other pro-
> blems ....
>
> Do y'all concur in this one ?
Good catch... I scratched my head for ages trying to figure out what
gives on this one.
Will commit a fix...
Regards,
Graham
--
-----------------------------------------
minfrin@sharp.fm
"There's a moon
over Bourbon Street
tonight..."
Re: Siteminder/mod_proxy issues
Posted by Martijn Schoemaker <ma...@osp.nl>.
Ok guys, I think I found the problem.
This is really a mod_proxy issue since the sending of headers
changed with the http 1.1 patch which was created by Graham.
In the 'old' version (1.3.12) the mod_proxy uses ap_table_do()
to send out all headers directly. Since the siteminder headers
were in err_headers_out, they needed to be concatenated to the
output response headers otherwise they would get lost. For this
there was a patch, provided by siteminder, which added an
ap_overlay_tables() to concatenate the err_headers to the response
headers which were sent directly. This patch was also incor-
porated in the mod_proxy source. (dunno from which version)
Now, in the new mod_proxy, ap_table_do() is no longer used to
send out the headers, but ap_send_http_headers() is used. And
in this method it does another concatenate of the err_headers
to the output response headers. Since the siteminder headers
were still in here, they were concatenated twice. Once by the
previously added ap_overlay_tables() (originally put in to
do what ap_send_http_headers() already does already) and once
in the ap_send_http_headers().
Now I think this is enough proof to say that the 'old' manual
ap_overlay_tables() line (539 in my proxy_http.c file) can be
(ehm MUST be) removed from the code since is now causes dup-
lication of headers which again triggers a lot of other pro-
blems ....
Do y'all concur in this one ?
Cheers,
Martijn Schoemaker
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