Added previous work on the libraries i used from FP1, and FP2 with more addons

1 files changed, 30 insertions, 0 deletions

diff --git a/tcptalk.rkt b/tcptalk.rkt
new file mode 100644
index 0000000..d069851
--- /dev/null
+++ b/tcptalk.rkt
@@ -0,0 +1,30 @@
+#lang racket
+
+(define listener (tcp-listen 8083 5 #t)) ;; listener to service connection requests
+;; client attempts to connect. Receives an input and output port
+(define-values (client-in client-out) (tcp-connect "localhost" 8083))
+;; server accepts the connection request. Also gets a pair of ports
+(define-values (server-in server-out) (tcp-accept listener))
+
+;; client sends identifying message
+(display (string-append "Client:My name is " "Ibrahim" "\n")
+         client-out)
+(flush-output client-out) ;; must flush as ports are buffered in racket
+
+;; server receives and reads it
+;; cooler if on separate racket instances
+(read-line server-in)  ;; --> "Client:My name is #hostname.
+;; server replies
+(display (string-append "Server:Hi " "Ibrahim" "\n") server-out)
+(flush-output server-out) ;; flush flush
+
+;; client displays server message
+(read-line client-in)
+(close-output-port server-out)
+(close-output-port client-out)
+(read-line client-in)  ;; --> eof object #eof
+(read-line server-in)  ;; --> eof object #eof
+(tcp-close listener)
+; (custodian-shutdown-all (current-custodian)) ;; release all resources including
+                                             ;; tcp, file, custom ports
+                                             ;; application exits