/**
  * Returns allow-origin rules
  *
  * @param bool    $cdnftp
  * @return string
  */
 public static function allow_origin($cdnftp = false)
 {
     switch (true) {
         case Util_Environment::is_apache():
         case Util_Environment::is_litespeed():
             $r = "<IfModule mod_headers.c>\n";
             $r .= "    Header set Access-Control-Allow-Origin \"*\"\n";
             $r .= "</IfModule>\n";
             if (!$cdnftp) {
                 return $r;
             } else {
                 return "<FilesMatch \"\\.(ttf|ttc|otf|eot|woff|woff2|font.css)\$\">\n" . $r . "</FilesMatch>\n";
             }
     }
     return '';
 }
 /**
  * Generates directives for file cache dir
  *
  * @param Config  $config
  * @return string
  */
 private function rules_cache_generate($config)
 {
     switch (true) {
         case Util_Environment::is_apache():
         case Util_Environment::is_litespeed():
             return $this->rules_cache_generate_apache($config);
         case Util_Environment::is_nginx():
             return $this->rules_cache_generate_nginx($config);
     }
     return '';
 }
 /**
  * Generate rules related to prevent for media 404 error by WP
  *
  * @param Config  $config
  * @return string
  */
 private function rules_no404wp_generate($config)
 {
     switch (true) {
         case Util_Environment::is_apache():
         case Util_Environment::is_litespeed():
             return $this->rules_no404wp_generate_apache($config);
     }
     return false;
 }
 /**
  * Generates rules for WP dir
  *
  * @param Config  $config
  * @return string
  */
 private static function rules_generate($config)
 {
     switch (true) {
         case Util_Environment::is_apache():
         case Util_Environment::is_litespeed():
             return self::rules_generate_apache($config);
         case Util_Environment::is_nginx():
             return self::rules_generate_nginx($config);
     }
     return '';
 }
 /**
  * Returns true if we can check rules
  *
  * @return bool
  */
 public static function can_check_rules()
 {
     return Util_Environment::is_apache() || Util_Environment::is_litespeed() || Util_Environment::is_nginx();
 }