(define (send-static-file filename)
  (condition-case
      (let* ((path (make-pathname (root-path) filename))
             (h (request-headers (current-request)))
             (size (file-size path))
             (last-modified (file-modification-time path))
             (etag (cons 'strong (conc size "-" last-modified)))
             (unmodified (or (and-let* ((t (header-values 'if-none-match h)))
                               (etag-matches? etag t))
                             (and-let* ((t (header-value 'if-modified-since h)))
                               (<= last-modified (utc-time->seconds t))))))
        (parameterize ((current-response
                        (if unmodified
                            (update-response (current-response) status: 'not-modified)
                            (current-response))))
          (with-headers `((last-modified #(,(seconds->utc-time last-modified)))
                          (etag ,etag)
                          (content-length ,(if unmodified 0 size))
                          (content-type ,(file-extension->mime-type
                                          (pathname-extension filename))))
            (lambda ()
              (write-logged-response)
              (when ((response-has-message-body-for-request?)
                     (current-response) (current-request))
                (with-output-to-port (response-port (current-response))
                  (lambda ()
                        ;workaround
			(print(read-all path)) )))))))
    ((exn i/o file) (send-status 'forbidden))))