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-rw-r--r--tests/tcpvanilla/server.rkt58
1 files changed, 58 insertions, 0 deletions
diff --git a/tests/tcpvanilla/server.rkt b/tests/tcpvanilla/server.rkt
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+#lang racket
+
+;; Both `server' and `accept-and-handle' change
+;; to use a custodian.
+;; To start server
+;; (define stop (serve 8080))
+;; use your web browser to connect localhost:8080 greeted with "hello world"
+;; (stop) to close the server
+
+(define (serve port-no)
+ (define main-cust (make-custodian))
+ (parameterize ([current-custodian main-cust])
+ (define listener (tcp-listen port-no 5 #t))
+ (define (loop)
+ (accept-and-handle listener)
+ (loop))
+ (thread loop))
+ (lambda ()
+ (displayln "\nGoodbye, shutting down all services\n")
+ (custodian-shutdown-all main-cust)))
+
+(define (accept-and-handle listener)
+ (define cust (make-custodian))
+ (parameterize ([current-custodian cust])
+ (define-values (in out) (tcp-accept listener))
+ (thread (lambda ()
+ (handle in out) ;; this handles connection with that specific client
+ (close-input-port in)
+ (close-output-port out))))
+ ;; Watcher thread:
+ (thread (lambda ()
+ (sleep 120)
+ (custodian-shutdown-all cust))))
+
+(define (handle in out)
+ ; (server-loop in out)
+ (sleep 5) ;; wait 5 seconds to guarantee client has already send message
+ (define echo (read-line in)) ;; bind message to echo
+ (displayln (string-append echo "\n"))
+ ; echo back the message, appending echo
+ ; could regex match the input to extract the name
+ (writeln "Admin: Hello there" out) ;; append "echo " to echo and send back
+ (flush-output out)
+)
+
+(define input-prompt "Hermes: ")
+
+(define (server-loop in out)
+ (define echo (read-line in))
+ (displayln echo)
+ (display ">>> ")
+
+ (define input (read))
+ (writeln (string-append "Admin: " input) out)
+ (flush-output out)
+ ; (sleep 10)
+ (server-loop in out))
+