#lang racket
;; Both `server' and `accept-and-handle' change
;; to use a custodian.
(define (serve port-no)
(define main-cust (make-custodian))
(parameterize ([current-custodian main-cust])
(define listener (tcp-listen port-no 5 #t))
(define (loop)
(accept-and-handle listener)
(loop))
(thread loop))
(lambda ()
(custodian-shutdown-all main-cust)))
(define (accept-and-handle listener)
(define cust (make-custodian))
(parameterize ([current-custodian cust])
(define-values (in out) (tcp-accept listener))
(thread (lambda ()
(handle in out)
(close-input-port in)
(close-output-port out))))
;; Watcher thread:
(thread (lambda ()
(sleep 10)
(custodian-shutdown-all cust))))
(define (handle in out)
;; Discard the request header (up to blank line):
(regexp-match #rx"(\r\n|^)\r\n" in)
;; Send reply:
(display "HTTP/1.0 200 Okay\r\n" out)
(display "Server: k\r\nContent-Type: text/html\r\n\r\n" out)
(display "<html><body>Hello, world!</body></html>" out))