Robert Szabo wrote:
From: Robert Szabo
Sent: Tuesday, November 03, 2009 10:46 PM
To: squid-users@squid-cache.org
Subject: Icap Reqmod
Hi all,
I am attempting to use the icap client interface to perform url redirects. I
have done this using my icap server connecting to several commercial gateway
boxes without issue however, with squid it's not working as I had hoped.
A typical icap reqmod would appear something like:
REQMOD icap://localhost:8082/ ICAP/1.0
Host: localhost
Connection: close
Encapsulated: req-hdr=0, null-body=117
X-UserId: 55555555555
GET / HTTP/1.1
Host: fastclick.net
Accept: text/html, text/plain
Accept-Encoding: compress
Pragma: no-cache
And a blocking or redirect response would look like:
ICAP/1.0 200 OK
Encapsulated: req-hdr=0, req-body=148
ISTag: istag
Server: AMS-ICAP-Server-Software/1.0
GET www.nogo.com/redirect.pl?cat=3&a=b HTTP/1.1
Accept: text/html, text/plain
Accept-Encoding: compress
Pragma: no-cache
Content-Length: 2
Missing either protocol spec http:// or path-spec / at the start of the
URL, and a Host: header....
You will notice the GET and Host: portions in the reqmod, these are essential
for redirection to work.
However with Squid 3.0 and Squid 3.1, the reqmod does not look right, it is
missing the GET and instead has HEAD in that location and does not split out
the query path from the host :
REQMOD icap://127.0.0.1:8082/reqmod ICAP/1.0
Host: 127.0.0.1:8082
Date: Tue, 03 Nov 2009 23:38:31 GMT
Encapsulated: req-hdr=0, null-body=135
Allow: 204
HEAD http://www.888.com/ HTTP/1.0
User-Agent: Wget/1.11.4 (Red Hat modified)
Accept: */*
Host: www.888.com
X-UserId: 5555555555
I have tried responding in the same vane as the message above replacing the url
in the HEAD line, however, the request goes through fine without considering
the redirect.
Can someone provide a sample reqmod and redirect response that would work?
Many Thanks,
Bob
You seem to have generated that test request with wget --spider or -N
options and with wget configured to use a proxy.
That means it generates HEAD requests instead of GET and formats the
request URL suitable for a proxy to handle easily. Squid is simply
passing what it is given to the ICAP server.
What exact releases of squid did you test with?
Amos
--
Please be using
Current Stable Squid 2.7.STABLE7 or 3.0.STABLE20
Current Beta Squid 3.1.0.14
