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iRule Redirect for the same URL?

Hello All,

I am struggling to implement an iRule condition for the same URL where I can't use any redirects like 301, 302, 307, etc. because of infinite loop.

Here is the example.

Source URL: www.example.com/testing/irule

Destination URL: www.example.com/testing/irule/not/working/

so basically I want to add /not/working/ part before hitting the backend servers. I tried few techniques but no results yet.

Thanks as always, R

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Answers to this Question


I don't think you need to use a redirect to do what you are trying to accomplish.

If it's a limited number of URLs, and the list is pretty static, why not just use a rewrite profile, which maps (in a reversible fashion) between an external and internal URL?

If the list isn't static, you could use a local traffic policy or iRule to rewrite the URLs in client requests and server responses.

Comments on this Answer
Comment made 26-Jul-2018 by Stephane Viau 122

when HTTP_REQUEST { switch [HTTP::path] { "/testing/irule" { HTTP::path [HTTP::path]/not/working } } }

But as rob said you might want to use a rewrite profile because rewriting URIs like this may cause other problems with your application if you do not also rewrite the HTML code sent back to the browser.

Comment made 26-Jul-2018 by Root44 405

Thank you, rob_carr and Stephane, for your inputs. The issue is, it is 126 lines of code where only this part has an issue, so I won't be able to add the rewrite profile which could be a help for few lines of code.

I tried something like this though and it didn't work:

if {[HTTP::uri] contains "/testing/irule/*"} { HTTP::uri "/not/working/" }

Do you see any issues in it?

Comment made 26-Jul-2018 by Stephane Viau 122

If you do :

HTTP::uri "/not/working/"

your URI will be "/not/working", not "/testing/irule/not/working".

If you wish to have /testing/irule/not/working, you need to do this :

HTTP::uri [HTTP::uri]/not/working

And ideally you should use HTTP::path instead of HTTP::uri because HTTP::uri contains the path AND the query string. So if your URL is something like http://somesite.com/testing/irule?user=username and you have some code that looks like "if HTTP::uri equals /testing/irule", you will never get a match because from the iRule point of view HTTP::uri would equal "/testing/irule?user=username".