If URL contains [blank] redirect to original URL @ different port

Hi folks,

I'm trying to setup what I believe is a fairly simple redirect iRule but a total lack of experience has me stumped. Here's what I'm trying to accomplish:

If a client hits a URL containing "synchrony" then they will be redirected to the same URL with port 8091.

As an example:

• client hits - http://test.co/synchrony
• then redirect to - http://test.co:8091/synchrony

or

• client hits - http://test.co/synchrony/v1/test/example
• then redirect to - http://test.co:8091/synchrony/v1/test/example

Here's the iRule I'm currently using:

when HTTP_REQUEST { if { [string tolower [HTTP::uri]] contains "/synchrony" && [TCP::local_port] == 80 } { HTTP::redirect "http://[getfield [HTTP::host] ":" 1]:8091/[URI::basename [HTTP::uri]]" } }

...which works fine on the first example, but fails if the url contains anything after "/synchrony".

Any guidance would be greatly appreciated.