URL redirect with path

A couple comments/questions...

• All URLs start with "/", so as long as the host is www.abc.com, you'll never get to the else.
• There is no need to string tolower the host, that is case insensitive according to the RFC.
• Do you want any redirects if the host is not www.abc.com? If it's not, there is no additional logic to handle that.

That said, assuming you don't need any redirects for the non-matching host, here's how I'd write that:

when HTTP_REQUEST {
    if { ([HTTP::host] eq "www.abc.com") and not([HTTP::uri] eq "/") } {
        HTTP::respond 301 Location "http://jrahmtest.local[HTTP::uri]"
        event disable all
    } elseif { [HTTP::host] eq "www.abc.com" } {
        HTTP::respond 301 Location "http://jrahmtest.local/"
        event disable all
    }
}

Test results: