Reuben S. wrote:
Hi,
I have an existing url_rewrite_program script which redirects the user
based on the host they came in on. I also want to redirect the user
to different URLs based on their user agent string (for example, if
the string has the word "iphone" in it). Does anyone know how I'd
accomplish this with a single url_rewrite_program? I've checked out a
few squid options, but I haven't found what I'm looking for yet.
Should I be using urlgroups or something?
I've found some information on how to do this, but no details. For
instance, this email says what I'd like to do is possible, but doesn't
say how:
http://www.squid-cache.org/mail-archive/squid-users/200803/0802.html
Thanks,
Reuben
Before I start, please reconsider any use of URL re-writing carefully.
It introduces a number of problems that are avoidable by proper use of
HTTP messages.
When Henrik means there is that you can use ACLs to control what
requests get re-written. For example;
acl iphone browser ...
url_rewrite_access allow iphone
url_rewrite_access deny all
... will cause on the requests with User-Agent: header matching the
pattern you enter to be re-written.
Do redirection of ore than one type, you will need something more
sophisticated than just a URL-rewriter.
The best alternative we have is deny_info 'redirecting' requests
matching an ACL to some other URL. For example;
acl iphone browser ...
acl site dstdomain www.example.com
http_access deny site iphone
deny_info http://iphone.example.com/ iphone
... will redirect any requests made from an iphone agent for
www.example.com to iphone.example.com
NP: deny_info is limited in current Squid to one destination URL..
However if you are willing to use a build of 3.2 (alpha code right now)
you can dynamically generate the deny_info URL and for example change
the domain name but keep the path and other parts of the URL.
A more tricky and complex setup would be to mix external_acl_type helper
with a url-rewrite helper. Where the external_acl_type helper registers
some background key outside Squid indicating that the next URL X from
client IP Y needs to be re-written to Z. Then the URL-rewriter when it
seeks IP Y requesting URL X does the re-write.
Amos
--
Please be using
Current Stable Squid 2.7.STABLE7 or 3.0.STABLE23
Current Beta Squid 3.1.0.16
