when HTTP_RESPONSE {
if {[HTTP::is_redirect]}{         
HTTP::header replace Location [string map {:port/ /} [HTTP::header value Location]]
HTTP::header replace Location [string map {:port/ /} [HTTP::header value Location]]
}
}

when HTTP_REQUEST {
if {[HTTP::uri] starts_with "/上下文" } {
    pool 池名称 
  }
 set http_header [HTTP::header X-Forwarded-For]
log local0. "$http_header"
}