On 31.01.2012 08:58, Vishnu Narayanan M wrote:
Sir,
This is my second mail, I had introduced myself in the first mail. I
am a final year graduate student. I am trying to implement a daily
quota management in squid proxy. I have a program which will give me
an integer return value; which I am using to decide if the quota for
the particular user has expired or not.
Be aware Squid does not contain the mechanisms to do quotas accurately.
Due to ACLs and redirectors being run only at the beginning of a
transaction and loggers only being run at the ending there is a large
(possibly GB data large) gap in between where the client has essentially
free access.
I have found out from internet that I can use 'Redirection Helpers'
to
setup the redirection functionality that i wanted. But it is not
clear
how to use it. It is said that "The helper program is NOT a standard
part of the Squid package. However, some examples are provided below,
and in the "helpers/url_rewrite/" directory of the source
distribution". But it is not clear where to place the redirection
file
that I create,
Anywhere on the same machine. Squid only requires system permissions to
run it.
and how to enable this feature in squid proxy.
With url_rewrite_program directive. Which takes the full path to your
script or binary helper. Along with any command line arguments it
requires.
http://www.squid-cache.org/Doc/config/url_rewrite_program/
Also, it
is not clear if this new file has to be named in some particular
name.
It is optional. The helpers we package with Squid are named in a way
which makes it easy for admin to see where they are configured and what
they do. It is suggested to follow that naming style, but not required.
I am planning to write a C++ program that will accept command line
input and write new url to stdout in the format "[channel-ID]
status:URL". Will this be enough for my purpose?
For a redirector, yes. But take care to avoid producing the
"status:URL" part when there is no change to be done to the URL.
http://wiki.squid-cache.org/Features/AddonHelpers#URL_manipulation
Amos
