33 lines
1.1 KiB
Scheme
33 lines
1.1 KiB
Scheme
#lang scheme/base
|
|
(require web-server/servlet
|
|
web-server/managers/timeouts)
|
|
(provide (all-defined-out))
|
|
(define interface-version 'v2)
|
|
(define manager
|
|
(create-timeout-manager
|
|
(lambda _ `(html (body "Expired")))
|
|
360 360))
|
|
|
|
; request-number : str -> num
|
|
(define (request-number which-number)
|
|
(string->number
|
|
(extract-binding/single
|
|
'number
|
|
(request-bindings (send/suspend (build-request-page which-number))))))
|
|
|
|
; build-request-page : str -> str -> response
|
|
(define (build-request-page which-number)
|
|
(lambda (k-url)
|
|
`(html (head (title "Enter a Number to Add"))
|
|
(body ([bgcolor "white"])
|
|
(form ([action ,k-url] [method "post"])
|
|
"Enter the " ,which-number " number to add: "
|
|
(input ([type "text"] [name "number"] [value ""]))
|
|
(input ([type "submit"] [name "enter"] [value "Enter"])))))))
|
|
|
|
(define (start initial-request)
|
|
`(html (head (title "Sum"))
|
|
(body ([bgcolor "white"])
|
|
(p "The answer is "
|
|
,(number->string (+ (request-number "first") (request-number "second")))))))
|