Squid Redirectors

win32sux · 08-07-2005, 12:43 AM

how can I use multiple redirectors with squid??

i have a simple redirector which i wrote but now i need to install the adzapper redirector also and i can't figure-out how to have them both...

win32sux · 08-07-2005, 01:04 AM

found this right there on the adzapper homepage:

Quote:

Chaining Redirector Programs

People running on very small systems, such as a low end system running something like LEAF, should also see Andrew Liebeskind's nifty Adzap2Squirm script which translates the zapper patterns for use with Squirm.

Chris Lightfoot <chris@ex-parrot.com> wrote asking if I could make the zapper friendly to setups where people chain multiple redirection programs together (for example, to run both the ad zapper and another tool like SquidGuard). Then Adam Hope <a.hope@csl.gov.uk> wrote to say that they were chaining to another redirector which wanted the full 4 word input a redirector may expect.

The specification for the redirectors says unredirected URLs should be indicated with a blank line, which is no good for piping the output of one into the next. Accordingly, to chain redirectors a wrapper program is needed to pass URLs to each redirector in turn.

To chain redirectors:

1. Fetch the scripts wrapzap and zapchain and install them where you installed the squid_redirect script. Remember that all scripts should have public read/execute oermissions:

chmod a+rx scripts...

2. As stated in the section on customising the zapper, the main purpose of wrapzap is to tune the behaviour of the zapper. However, it is also the hook for chaining things.
1. Adjust the setting for zapper near the top of the script.
2. Change the last lines of wrapzap from:

exec "$zapper"
# exec /path/to/zapchain "$zapper" /path/to/another/eg/squirm

to:

# exec "$zapper"
exec /path/to/zapchain "$zapper" /path/to/another/eg/squirm

and adjust the pathnames to suit. You may name as many different redirectors as you like, not just two.
3. Change the squid config line:

redirect_program /path/to/squid_redirect

to be:

redirect_program /path/to/wrapzap

This causes squid to run wrapzap, wrapzap to run zapchain and zapchain to run the various redirectors correctly.

i tried it and it seems to work just fine...