30 lines
851 B
Racket
30 lines
851 B
Racket
#lang racket
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(require web-server/servlet
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web-server/formlets)
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(provide (all-defined-out))
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(define interface-version 'v1)
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(define timeout +inf.0)
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; request-number : str -> num
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(define (request-number which-number)
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(send/formlet
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(formlet
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(#%# "Enter the " ,which-number " number to add: "
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,{input-int . => . the-number}
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(input ([type "submit"] [name "enter"] [value "Enter"])))
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the-number)
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#:method
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"GET"
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#:wrap
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(lambda (f-expr)
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`(html (head (title "Enter a Number to Add"))
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(body ([bgcolor "white"])
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,f-expr)))))
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(define (start initial-request)
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(response/xexpr
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`(html (head (title "Sum"))
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(body ([bgcolor "white"])
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(p "The answer is "
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,(number->string (+ (request-number "first") (request-number "second"))))))))
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