if( (req_time = is_cache_valid( r, cfg )) != -1){
      /* Can use client side cache? */
      ap_update_mtime( r, req_time );
      ap_set_last_modified( r );
      if( (errstatus = ap_meets_conditions(r)) != OK )
	return errstatus;
      /* No, must use use server side */
      /* Send headers */
      ap_send_http_header(r);
      if (r->header_only) {
        ap_pfclose(r->pool, f);
        return OK;
      }
      /* Send content */
      send_cached_page( r, cfg );
    }
    else{
      /* Send headers */
      ap_send_http_header(r);
      if (r->header_only) {
        ap_pfclose(r->pool, f);
        return OK;
      }
      /* Send content */
      send_parsed_content(f, r );
    }