Re: [squid-users] proxy_auth & squidNT

On Tuesday 24 June 2003 02.01, Justin Smith wrote:

> Where might I find modules like this, or barring that, a decent
> reference to write one?

Squid auth helpers are just plain stdio programs, reading lines of
input from stdin and for each line responding with OK/ERR to stdout.

Input format to basic auth helpers is

   login<space>password<newline>

both login and password is URL escaped (%nn syntax)

If the login is correct then the auth helper should respond with the
string OK<newline>

If there is some problem, the helper should respons with the string
ERR<newline>

In most languages you need to disable stdio output buffering. In C
this is done with "setbuf(stdout, NULL);", in perl by "$|=0;". Other
languages vary.

You can easily verify the above by running the ncsa_auth helper by
hand.

Note: Squid also ships with a LDAP and NT-Domain helpers plus a few
other (probably not interesting in an NT environment). There is also
a Radius helper available on the Internet but I am not sure if this
can be built in NT or how well it works.

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