syndicate-rkt/syndicate-examples/tcp-relay-server.rkt

28 lines
1.0 KiB
Racket

#lang syndicate
;;; SPDX-License-Identifier: LGPL-3.0-or-later
;;; SPDX-FileCopyrightText: Copyright © 2021 Tony Garnock-Jones <tonyg@leastfixedpoint.com>
(module+ main
(require racket/cmdline)
(require syndicate/drivers/tcp)
(define host "0.0.0.0")
(define port 5999)
(command-line #:once-each
[("--host" "-H") hostname "Set hostname to listen on"
(set! host hostname)]
[("--port" "-p") port-number "Set port number to listen on"
(set! port (string->number port-number))])
(message-struct Line (text))
(standard-actor-system (ds)
(at ds
(stop-on (asserted (TcpListenError (TcpLocal host port) $message)))
(during/spawn (StreamConnection $source $sink (TcpLocal host port))
(handle-connection source sink
#:initial-mode (Mode-lines (LineMode-lf))
#:on-data (lambda (data mode) (send! ds (Line data))))
(at ds (on (message (Line $data)) (send-line sink data)))))))