Demo: A simple MVC-web-framework implementation with PLT Scheme (Racket)

app.rkt

;;By Jhen Kung, ryankung@ieee.org
;;app.rkt

#lang racket(require web-server/servlet
         web-server/servlet-env
         "router.rkt")

(serve/servlet mordor
               #:port 8080
               #:servlet-path "/"
               #:servlet-regexp #rx"")

model.rkt

;;By Jhen Kung, ryankung@ieee.org
;;model.rkt

(require db)
(define connect
    (mysql-connect #:user user
                        #:database db
                        #:password password))
(query-exec connect
     "create temporary table the_numbers (n integer, d varchar(20))")

router.rkt

;;By Jhen Kung, ryankung@ieee.org
;;router.rkt

(module router racket
  (require web-server/servlet
           web-server/servlet-env
           "view.rkt")

  (define-values (dispatch req-url)
    ;;router
    (dispatch-rules
     [("") test]
     [("test") index]
     [else index]))
 
  (define (mordor req)
    (dispatch req))
 
  (provide mordor))

view.rkt

;;By Jhen Kung, ryankung@ieee.org
;;view.rkt

(module view racket
  (require web-server/servlet
           web-server/servlet-env
           web-server/templates)
 
  (define (index req)
    (response/xexpr
     `(html (head (title ,(url->string (request-uri req))))
            (body (h1 "PINTOV!")
                  (span ,(url->string (request-uri req)))
                  ))))

  (define (test req)
    (response/full
     200 #"Okay"
     (current-seconds) TEXT/HTML-MIME-TYPE
     empty
     (list (string->bytes/utf-8 (include-template "index.html")))))
  (provide index test))