How can I enable logging for requests going through mod proxy

Is there a way to log requests going through mod proxy? I need a way to debug my configuration, because I don't seem to be getting where I should be. I need the following information:

• headers of incoming requests
• what is being sent to the proxy target

Maybe a related question: is there a way to strip some headers? I tried the following:

ProxyPass         /proxy/other http://not.under.my.control/
<Location /proxy/other>
   ProxyPassReverse /
   RequestHeader unset Authorization
</Location>

I don't really know whether this is ok, because I don't see anything.

Solution 1:

Another option might be mod_forensic, can easily log the request and headers etc. Beware of disk space usage though, on a heavy load web-site mod_forensic can easily produce tens of Gigs per day.

http://httpd.apache.org/docs/2.2/mod/mod_log_forensic.html

Solution 2:

I used dumpio. I put the following in /etc/httpd/conf.d/dumpio.conf:

LoadModule dumpio_module modules/mod_dumpio.so

DumpIOInput On
DumpIOOutput On
DumpIOLogLevel debug

LogLevel debug

An often forgotten piece is setting the LogLevel to debug. Without it, you won't actually see any DumpIO output.

The log output is written to the error log for the virtual host and/or the server.