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Reply to topic   Topic: Squid reverse proxy and relative URL
Author
jnsunkersett



Joined: 30 Jan 2011
Posts: 23

PostPosted: Thu 10 May '12 7:13    Post subject: Squid reverse proxy and relative URL Reply with quote

Hi,

The below is not related to Apache per se, so not sure if I am posting in the correct forum.
Beg your pardon (and approriate advice), if incorrect.

I have hosted a internet facing application.

I have a small issue in my production setup, in which I have used Squid Reverse proxy, to receive all requests coming from the internet.

In that, I have observed, I have to use fully qualifed URLs; I cannot use relative URLs.

Why?
Is this a must with squid reverse proxy?)

My prod setup, is as

(in DMZ) I use Squid 2.6 Stable 21, as a reverse proxy (RP) running on a Red Hat linux server

So all requests coming from the internet are resolved/ redirected/ forwarded to a web server (Apache HTTPD on a windows 2008).

Apache is further connected to JBoss (using AJP1.3)

In the squid RP config, is used

httpd_accel_host 10.0.1.9

So if client browses to https://www.mydomain.com, he hits my public IP, followed by squid RP which resolves/ forwards it to https://10.0.1.9/index.jsp; in which I do a relative redirecttion, viz.;

response.redirect("/landingPage.do");

which cannot be displayed to an external user as the fully qualified url is now;
https://10.0.1.9/landingPage.do

(squid access log, shows TCP_MISS/404)

So for a workaround, in my JSP, I do not use relative URLs but prefix the domain explicitly, viz.

response.redirect("https://www.mydomain.com" + "/landingPage.do");

* Is this a MUST?,
* or is something missing in my squid reverse proxy configuration?

PS: I do not face this issue in my UAT setup where I use Microsoft ISA as a reverse proxy server.

Any help will be greatly appreciated.

thanks in advance.

Jeevan
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James Blond
Moderator


Joined: 19 Jan 2006
Posts: 6998
Location: Germany, Next to Hamburg

PostPosted: Tue 15 May '12 12:33    Post subject: Reply with quote

my pure guessing for a solution or workaround.

edit the /etc/hosts file on the linux machine add

10.0.1.9 www.yourdomain.com

and than in the squid config

httpd_accel_host www.yourdomain.com


this is quessing without knowing Wink

However, you should use a tool like firebug to trace the redirects. a) from internal and b) from external and see which server (squid or apache or jboss) adds that IP infront of the redirect.
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