Rewrite iRule to replace ISAPI rewrite

Hi Bob,

 

 

You can definitely use an iRule to send a redirect back to the client, or rewrite the Location header in a redirect that the application sends. If you can provide more specifics on what you're trying to rewrite from/to, plenty of people around here could help with an example or two.

 

 

Aaron

I'm looking for this example. If you could provide, that would be great. Here are some more details on what we are doing.

 

 

We use IIS 6, so there is of course no wildcarding available when setting up a site. We have template sites that all use their own "subdomain". So, for example, let's say we are dealing with the domain mydealers.com

 

 

Each dealer would have it's own subdomain that would be dealer1.mydealers.com, dealer2.mydealers.com.......now, as we know, I could setup each and every subdomain within IIS but there are hundreds and always adding more. In order to get around this, we now use ISAPI Rewrite but now we have an F5 LTM (YEAH!).

 

 

All the sites use the same code base under the one IIS entry. We just use the subdomain name to make sure that dealers inventory shows up on the site and not some other dealer.

 

 

How can I do the same thing with the F5 as I do with ISAPI Rewrite.

 

 

Thanks!

A couple of examples from our rewrite rule is below, honestly I still don't completely understand it, my dev guy wrote these, I just put them in place, hope it helps a bit...

 

 

 

when HTTP_REQUEST {

 

if { [string tolower [HTTP::uri]] equals "/helpcenter/" } {

 

HTTP::uri "/helpcenter/Pages/default.aspx"

 

}

 

elseif { [string tolower [HTTP::uri]] equals "/helpcenter/livehelp.htm" } {

 

HTTP::uri "/Pages/livehelp.aspx"

 

}

 

elseif { [string tolower [HTTP::uri]] starts_with "/policy/privacy.htm" } {

 

HTTP::uri "/Pages/privacy.aspx"

 

}

 

elseif { [string tolower [HTTP::uri]] starts_with "/policy/security.htm" } {

 

HTTP::uri "/Pages/security.aspx"

 

}

 

}

 

 

Also is a few examples from our Redirect rule:

 

 

when HTTP_REQUEST {

 

if { [string tolower [HTTP::host]] equals "www.mydomain.com" } {

 

HTTP::respond 301 Location http://mydomain.com[HTTP::uri]

 

}

 

elseif { ([string tolower [HTTP::uri]] equals "/default.htm") || ([string tolower [HTTP::uri]] equals "/default.html") } {

 

HTTP::redirect http://mydomain.com/

 

}

 

elseif { [string tolower [HTTP::uri]] starts_with "/newsroom" } {

 

HTTP::respond 301 Location http://test.mydomain.com/newsroom/[substr [HTTP::uri] 10 ]

 

}

 

elseif { [string tolower [HTTP::uri]] starts_with "/g2p" } {

 

HTTP::redirect http://test.mydomain.com/g2p/[substr [HTTP::uri] 5 ]

 

}

 

elseif { [string tolower [HTTP::uri]] starts_with "/eventcal" } {

 

HTTP::respond 301 Location http://test.mydomain.com/eventcal/[substr [HTTP::uri] 10 ]

 

 

 

Good luck..

 

Bob

Those look like pretty good examples, though I might recommend the use of the switch command for a little added efficiency and, to me, ease of reading.

 

 

Colin