From cb381871d518077649be6272af823dabec2fcd28 Mon Sep 17 00:00:00 2001 From: Ibrahim Mkusa Date: Sun, 9 Apr 2017 22:37:50 -0400 Subject: reorganized repo a bit better --- client.rkt | 102 ------------------------------------------------------------- 1 file changed, 102 deletions(-) delete mode 100644 client.rkt (limited to 'client.rkt') diff --git a/client.rkt b/client.rkt deleted file mode 100644 index 25be149..0000000 --- a/client.rkt +++ /dev/null @@ -1,102 +0,0 @@ -#lang racket -(require math/base) ;; for random number generation - -;; author: Ibrahim Mkusa -;; about: print and read concurrently -;; notes: output may need to be aligned and formatted nicely -;; look into -;; https://docs.racket-lang.org/gui/text-field_.html#%28meth._%28%28%28lib._mred%2Fmain..rkt%29._text-field~25%29._get-editor%29%29 - -;; create custodian for managing all resources -;; so we can shutdown everything at once -;(define guard (make-custodian (current-custodian))) -;(current-custodian guard) -;; reads values continously from stdin and redisplays them - -;; Notes connect to server on localhost -;; use client template of tcpvanilla -;; use event for read-write - -;; modify read-loop-i -; read a value and send it to server via output-port - -; is there something in the input port. If yes? display it -; in the hello world - -; make connection to server -(define (client port-no) - (define main-client-cust (make-custodian)) - (parameterize ([current-custodian main-client-cust]) - ;; connect to server at port 8080 - (define-values (in out) (tcp-connect "localhost" port-no)) ;; define values - (display in) - (displayln out) - ;; binds to multiple values akin to unpacking tuples in python - (display "What's your name?\n") - (define username (read-line)) - - ; (thread (lambda () - ;; make threads 2 lines - (define a (thread - (lambda () - (let loop [] - (receive-messages in) - (sleep 1) - (loop))))) - (define t (thread - (lambda () - (let loop [] - (send-messages username out) - (sleep 1) - (loop))))) - (thread-wait t) ;; returns prompt back to drracket - (close-input-port in) - (close-output-port out)) - (custodian-shutdown-all main-client-cust)) - - -;; the send-messages -(define (send-messages username out) - ;; intelligent read, quits when user types in "quit" - ;(semaphore-wait fair) - ; (display usernamei) - (define input (read-line)) - ;; do something over here with input maybe send it out - - ;; Tests input if its a quit then kills all threads - ;; An if would be better here tbh - ;; (cond ((string=? input "quit") (begin (kill-thread a) - ;(kill-thread t)))) - (cond ((string=? input "quit") (exit))) - ;; modify to send messages to out port - (displayln (string-append username ": " input) out) - (flush-output out) - - ;(semaphore-post fair) - ; (read-loop-i out) -) - - - -;; print hello world continously -;; "(hello-world)" can be executed as part of background thread -;; that prints in the event there is something in the input port -(define (receive-messages in) - ; (sleep (random-integer 0 15)) ;; sleep between 0 and 15 seconds to simulate coms - ;; with server - ;(semaphore-wait fair) - ;; we will retrieve the line printed below from the server - (define evt (sync/timeout 30 (read-line-evt in))) - (cond [(eof-object? evt) - (displayln "Server connection closed") - (exit)] - [(string? evt) - (displayln evt)] ; could time stamp here or to send message - [else - (displayln (string-append "Nothing received from server for 2 minutes."))] - ) - ;(semaphore-post fair) -) - -(define stop (client 4321)) - -- cgit v1.2.3