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#lang racket
(require web-server/servlet)
(define interface-version 'v1)
(define timeout +inf.0)
(provide start interface-version timeout)
(define (start initial-request)
(define counter1 0)
(define counter2 0)
(send/suspend/dispatch
(lambda (embed/url)
(let*-values ([(inc1 next-counter1 next-counter2)
(include-counter counter1 counter2 embed/url)]
[(inc2 next-counter2 next-counter1)
(include-counter next-counter2 next-counter1 embed/url)])
(response/xexpr
`(html
(body (h2 "Web Cell Test")
(div (h3 "First") ,(inc1 next-counter1 next-counter2))
(div (h3 "Second") ,(inc2 next-counter2 next-counter1)))))))))
(define (include-counter my-counter other-counter embed/url)
; Note: This shouldn't be necessary (but is for testing, not in production)
(call-with-current-continuation
(lambda (k)
(letrec ([include
(lambda (next-my-counter next-other-counter)
`(div (h3 ,(number->string next-my-counter))
(a ([href
,(embed/url
(lambda _
(k include
(add1 next-my-counter)
next-other-counter)))])
"Increment")))])
(values include
my-counter
other-counter)))
servlet-prompt))
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