Data commit

Task/Chat-server/Racket/chat-server.rkt

@@ -0,0 +1,21 @@
+#lang racket
+
+(define outs (list (current-output-port)))
+(define ((tell-all who o) line)
+  (for ([c outs] #:unless (eq? o c)) (displayln (~a who ": " line) c)))
+
+(define ((client i o))
+  (define nick (begin (display "Nick: " o) (read-line i)))
+  (define tell (tell-all nick o))
+  (let loop ([line "(joined)"])
+    (if (eof-object? line)
+      (begin (tell "(left)") (set! outs (remq o outs)) (close-output-port o))
+      (begin (tell line) (loop (read-line i))))))
+
+(define (chat-server listener)
+  (define-values [i o] (tcp-accept listener))
+  (for ([p (list i o)]) (file-stream-buffer-mode p 'none))
+  (thread (client i o)) (set! outs (cons o outs)) (chat-server listener))
+
+(void (thread (λ() (chat-server (tcp-listen 12321)))))
+((client (current-input-port) (current-output-port)))