(s:html (s:head 
			    (s:title err)
			    (s:body
			     (s:h1 "ERROR")
			     (s:p err)))))))

(define (s:validate-uri)
  (let ((uri (getenv "REQUEST_URI"))
	(qrs (getenv "QUERY_STRING")))
  (let ((uri (get-environment-variable "REQUEST_URI"))
	(qrs (get-environment-variable "QUERY_STRING")))
    (if (not uri)
	(set! uri qrs))
    (if uri
	(string-match 
	 (regexp "^(/[a-z\\-\\._:0-9]*)*(|\\?([A-Za-z0-9_\\-\\+]+=[A-Za-z0-9_\\-\\.\\+]*&{0,1})*)$") uri)
	(begin
	  (s:log "REQUEST URI NOT AVAILABLE!")
	  (let ((p (open-input-pipe "env")))
	    (let loop ((l (read-line p))
		       (res '()))
	      (if (eof-object? l)
		  (s:log res)
		  (loop (read-line p)(cons (list l "<BR>") res)))))
	  #t))))

(define (s:validate-inputs)
  (if (not (s:validate-uri))(begin (s:error-page "Bad URI" (let ((ref (getenv "HTTP_REFERER")))
  (if (not (s:validate-uri))(begin (s:error-page "Bad URI" (let ((ref (get-environment-variable "HTTP_REFERER")))
							     (if ref
								 (list "referred from" ref)
								 "")))
				   (exit))))

;; anything except a list is converted to a string!!!
(define (s:any->string val)