syndicate-2017/racket/syndicate-monolithic/examples/chat-client.rkt

28 lines
1.2 KiB
Racket

#lang syndicate-monolithic
(require (only-in racket/port read-bytes-line-evt))
(require "../drivers/tcp.rkt")
(define local-handle (tcp-handle 'chat))
(define remote-handle (tcp-address "localhost" 5999))
(spawn-tcp-driver)
(spawn/stateless (lambda (e)
(match e
[(scn (? trie-empty?)) (quit)]
[(message (at-meta (external-event _ (list (? eof-object?)))))
(quit)]
[(message (at-meta (external-event _ (list line))))
(message (tcp-channel local-handle remote-handle line))]
[(message (tcp-channel _ _ bs))
(write-bytes bs)
(flush-output)
#f]
[_ #f]))
(scn/union
(subscription (external-event (read-bytes-line-evt (current-input-port) 'any) ?)
#:meta-level 1)
(subscription (tcp-channel remote-handle local-handle ?))
(subscription (advertise (tcp-channel remote-handle local-handle ?)))
(advertisement (tcp-channel local-handle remote-handle ?))))