Simple iRule for URL appending?

I have an very similar request which is that instead of append uri after url, I need insert "/aaa/bbb" in between. e.g. when user type in "http://www.testdomain.com/*", my F5 iRule need insert /aaa/bbb/ and make it "http://www.testdomain.com/aaa/bbb/*". Looking forward your kindly reply.

 

 

Not sure if "*" is the correct wildcard in TCL scripting, but when I put in "*", I actually mean that user could be puting different value.

 

 

Thanks

 

Roger