how to block Empty User-Agent and Empty Accept-Language values

Am trying to block request that have empty values for header fields

 

User-Agent and Accept-Language

 

 

I have below, but not sure if it check the value of the header or existence of the header field itself.

 

 

if { [HTTP::header exists "User-Agent"] and [HTTP::header exists "Accept-Language"} {

 

if { [HTTP::header "User-Agent"] equals "" and [HTTP:header "Accept-Language"] equals "" } {

 

reject

 

}

 

}

 

 

Will this work ?

 

 

Appreciate any input.

 

 

Puli.