47 lines
1.6 KiB
Racket
47 lines
1.6 KiB
Racket
#lang marketplace
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(require racket/port)
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;; Usually it's OK to just use display and friends directly.
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;; Here we have a console output driver just to show how it's done.
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(name-process 'console-output-driver
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(spawn (transition/no-state
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(subscriber (list 'console-output ?)
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(on-message [(list 'console-output item)
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(printf "~a" item)
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(void)])))))
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(name-process 'console-input-driver
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(spawn (transition/no-state
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(name-endpoint 'input-relay
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(publisher (list 'console-input ?)
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(on-absence
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(send-message (list 'console-output "Connection terminated.\n"))
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(quit))))
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(subscriber (cons (read-line-evt (current-input-port) 'any) ?)
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(on-message
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[(cons _ (? eof-object?))
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(send-message (list 'console-output "Terminating on local EOF.\n"))
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(delete-endpoint 'input-relay)]
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[(cons _ (? string? line))
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(send-message (list 'console-input line))])))))
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(name-process 'outbound-connection
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(spawn (let ((local (tcp-handle 'outbound))
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(remote (tcp-address "localhost" 5999)))
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(transition/no-state
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(subscriber (list 'console-input ?)
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(on-absence (quit))
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(on-message
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[(list 'console-input line)
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(send-message (list 'console-output (format "> ~a \n" line)))
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(send-message (tcp-channel local remote (string-append line "\n")))]))
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(publisher (tcp-channel local remote ?))
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(subscriber (tcp-channel remote local ?)
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(on-absence (quit))
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(on-message
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[(tcp-channel _ _ (? eof-object?))
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(quit)]
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[(tcp-channel _ _ data)
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(send-message (list 'console-output (format "< ~a" data)))]))))))
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