Hello
I have a test app programmed by newlisp. It connects to the server via TCP first, never sends request to server until server close the connection when timeout.
I read the API doc, but don't know which API could help me to determine the current connection's status.
Should I call net-send or net-receive for it?
Is
net-receive works for me.
(if (net-receive s buffer 2) (println "failed, the connection should be closed, time:" (date (date-value))) (println "succeeded, the connection was closed:" (net-error)))
But net-peek doesn't. It returns 0 instead of nil when connection has been closed by server.
(println (net-peek s))
(if (= (net-peek s) nil) (println "succeeded, the connection was closed:" (net-error)))
Try: http://www.newlisp.org/downloads/newlisp_manual.html#net-select
I tried your suggestion. It works for me. Thank you.
Below is my two functions for this topic, hope it would be helpful for others.
;; return true if connection was closed
(define (net-close2? s)
(if (net-receive s buffer 2) nil true))
(define (net-close? s)
(if (net-select s "exception" 1000) nil true))
But why the (net-select s "exception" 1000) returns nil when connection was closed.
It seems it should return true to tell users there is an exception happened.