Assist in Writing the below script with using Data Group String Class

Perhaps something like this:

when CLIENT_ACCEPTED { 
    set default_pool [LB::server pool] 
    log local0. "Default pool [LB::server pool] set" 
    log local0. "Client IP is [IP::remote_addr]" 
}
when HTTP_REQUEST { 
    set http_uri [string tolower [HTTP::uri]] 
    log local0. "requested [HTTP::uri]" 
    if {$http_uri equals "/" } { 
        HTTP::redirect "https://apbuild.leni2.com/SEUILibrary/controller/e/web/LenovoPortal/en_US/catalog.workflow:test-home" 
        pool pool_confarmct.leni2.com_http 
        log local0. "redirected from /"
        return
    } elseif { $http_uri starts_with "/iss_static" } {
        log local0. "matched /iss_static"
        pool pool_confarmct.leni2.com_http
        log local0. "pool_confarmct.leni2.com_http defined, [LB::server pool] selected" 
        return
    } elseif { [class match [string tolower [HTTP::path]] ends_with my_file_ending_dg] } {
        pool pool_confarmct.leni2.com_http 
        log local0. "[class match -name [string tolower [HTTP::path]] ends_with my_file_ending_dg] - object $http_uri pool_confarmct.leni2.com_http defined [LB::server pool] selected" 
    } else {
        log local0. "no match for rev. close connection"
        HTTP::close
    }
}

Where "my_file_ending_dg" is a string-based data group. Example:

".css" := ""
".doc" := ""
".txt" := ""
".svg" := ""
".avi" := ""
...