Remove trailing slash

I forgot to mention that I am on 9.4.5.

when HTTP_REQUEST {
if { [HTTP::uri] ends_with "/" } {
HTTP::uri [string trimright [HTTP::uri] "/"]
}
}

when HTTP_REQUEST {
if { not ( [HTTP::uri] equals "/" ) and ( [HTTP::uri] ends_with "/" ) } {
HTTP::uri [string trimright [HTTP::uri] "/"]
}
}

Say I need abc.def.com/emp should redirect to https://abc.def.com/redirect/redirect.aspx?src=emp.

Is the below iRule correct ?

when HTTP_REQUEST { HTTP::respond 301 Location "https://abc.def.com/redirect/redirect.aspx?src=[HTTP::uri]" }

How can I remove the "/" before [HTTP::uri] ? I need ?src=emp and not ?src=/emp