22 lines
787 B
Racket
22 lines
787 B
Racket
#lang racket
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(define outs (list (current-output-port)))
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(define ((tell-all who o) line)
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(for ([c outs] #:unless (eq? o c)) (displayln (~a who ": " line) c)))
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(define ((client i o))
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(define nick (begin (display "Nick: " o) (read-line i)))
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(define tell (tell-all nick o))
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(let loop ([line "(joined)"])
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(if (eof-object? line)
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(begin (tell "(left)") (set! outs (remq o outs)) (close-output-port o))
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(begin (tell line) (loop (read-line i))))))
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(define (chat-server listener)
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(define-values [i o] (tcp-accept listener))
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(for ([p (list i o)]) (file-stream-buffer-mode p 'none))
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(thread (client i o)) (set! outs (cons o outs)) (chat-server listener))
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(void (thread (λ() (chat-server (tcp-listen 12321)))))
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((client (current-input-port) (current-output-port)))
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