public static function post($buffer = '')
 {
     if (Router::is_api_request()) {
         return $buffer;
     }
     // additional processes added by ctrls
     foreach (self::$processes as $proc) {
         $buffer = $proc($buffer);
     }
     // custom angular directives
     $buffer = preg_replace_callback("/data-(md-[a-z][^=\\s>]*)/", function ($matches) {
         $name = Filter::snake_to_camel($matches[1]);
         Render::include_script("app/{$name}");
         return $matches[0];
     }, $buffer);
     // assets
     $buffer = preg_replace_callback("/<--([^-]+)-->/", function ($matches) {
         return Render::$matches[1]();
     }, $buffer);
     // href and src urls
     $buffer = preg_replace_callback('/="(\\/[^"]*)/', function ($matches) {
         return '="' . SUBDIR . $matches[1];
     }, $buffer);
     // css urls
     $buffer = preg_replace_callback("/\\((\\/[^)]*)/", function ($matches) {
         return "(" . SUBDIR . $matches[1];
     }, $buffer);
     return $buffer;
 }