73 lines
2.1 KiB
Racket
73 lines
2.1 KiB
Racket
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#lang racket
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;; Both `server' and `accept-and-handle' change
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;; to use a custodian.
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;; To start server
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;; (define stop (client 8080))
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;; use your web browser to connect localhost:8080 greeted with "hello world"
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;; (stop) to close the server
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(define (client port-no)
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(define main-client-cust (make-custodian))
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(parameterize ([current-custodian main-client-cust])
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;; connect to server at port 8080
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(define-values (in out) (tcp-connect "localhost" port-no)) ;; define values
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;; binds to multiple values akin to unpacking tuples in python
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; (thread (lambda ()
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(chat in out)
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(close-input-port in)
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(close-output-port out))
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(custodian-shutdown-all main-client-cust))
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; (sleep 60) ;; run for 3 minutes then close
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; (define (loop)
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; (write (read-line (current-input-port)) out)
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; (flush-output out)
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; (write (read-line in) (current-output-port))
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; (define listener (tcp-listen port-no 5 #t))
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; (define (loop)
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; (accept-and-handle listener)
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; (loop))
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; (thread loop)))
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; (custodian-shutdown-all main-client-cust)
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#| (lambda () |#
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; (displayln "Goodbye, shutting down client\n")
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#| (custodian-shutdown-all main-client-cust)) |#
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(define (chat in out)
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; (driver-loop in out)
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(writeln "Ibrahim: Hello, anyone in chat?" out)
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(flush-output out) ;; ports are buffered in racket must flush or you
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;; will read #eof
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(sleep 10) ;; wait 10 seconds
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(define serv-message (read-line in))
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(displayln serv-message) ;; read the servers replay message which is original
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;; with echo appended to it
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)
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; (define input-prompt "Hermes: ")
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(define (driver-loop in out)
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; (prompt-for-input input-prompt)
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(display ">>> ")
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(define input (read))
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(writeln (string-append "Ibrahim: " input) out)
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(flush-output out)
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; (sleep 10)
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(define output (read-line in))
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(displayln output)
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(driver-loop in out))
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#| (let ((input (read))) |#
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; )
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; (let ((input (read)))
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; (let ((output (mc-eval input the-global-environment)))
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; (announce-output output-prompt)
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; (user-print output)))
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; (driver-loop))
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;
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; (define (announce-output string)
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; (display string))
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#| |#
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