Serving static web content from a subdoamin

Got it working with following code:

when HTTP_REQUEST {
        set active_pool_name "main_site_pool"
        set actual_host_name "www.example.com"

    if {[matchclass [HTTP::host] eq static_content_route_class ]} {
            pool "$active_pool_name"
            HTTP::header replace Host "$actual_host_name"            }
}

Is there a better solution?