(use awful regex)

(define (define-page* page-path content)
  (define-page (regexp (string-append page-path "/*.*"))
    (lambda (path)
      (let ((url-args
	     ;; Removing `page-path' from the requested path
	     (string-split
	      (string-drop path (string-length page-path))
	      "/")))
        (condition-case
         (apply content url-args)
         ((exn arity) "invalid arity")
         (exn () (signal exn)))))))


;;;
;;; /page1 ignores all arguments
;;;
;; http://<server>:<port>/page1 => "no args"
;; http://<server>:<port>/page1/1 => "no args"
;; http://<server>:<port>/page1/1/2 => "no args"
(define-page* "/page1"
  (lambda _
    "no args"))


;;;
;;; /page2 requires exactly one argument
;;;
;; http://<server>:<port>/page2 => "invalid arity"
;; http://<server>:<port>/page2/1 => "foo=1"
;; http://<server>:<port>/page1/1/2 => "invalid arity"
(define-page* "/page2"
  (lambda (foo)
    (conc "foo=" foo)))


;;;
;;; /page3 requires one argument (the other is optional).  Ignores the
;;; rest.
;;;
;; http://<server>:<port>/page3 => "invalid arity"
;; http://<server>:<port>/page3/1 => "foo=1, bar=#f"
;; http://<server>:<port>/page1/1/2 => "foo=1, bar=2"
;; http://<server>:<port>/page1/1/2/3 => "foo=1, bar=2"
(define-page* "/page3"
  (lambda (foo #!optional bar)
    (conc "foo=" foo ", bar=" bar)))


;;;
;;; /page4: all arguments are optional (get bound if given).
;;;
;; http://<server>:<port>/page4 => "foo=#f, bar=#f"
;; http://<server>:<port>/page4/1 => "foo=1, bar=#f"
;; http://<server>:<port>/page4/1/2 => "foo=1, bar=2"
;; http://<server>:<port>/page4/1/2/3 => "foo=1, bar=2"
(define-page* "/page4"
  (lambda (#!optional foo bar)
    (conc "foo=" foo ", bar=" bar)))