Wait for a Socket to Become Readable

See more Socket/SSL/TLS Examples

Demonstrates Socket.SelectForReading, which waits for read-ready activity on the socket, or on any contained socket when the object is a socket set. It returns 1 if ready, 0 on timeout, or -1 on error.

func chilkatTest() {
    var success: Bool = false

    let socket = CkoSocket()!

    //  Connect to the server using TLS.
    var bTls: Bool = true
    var maxWaitMs: Int = 5000
    success = socket.connect(hostname: "example.com", port: 5000, ssl: bTls, maxWaitMs: maxWaitMs)
    if success == false {
        print("\(socket.lastErrorText!)")
        return
    }

    //  Wait up to 5 seconds for read-ready activity on the socket (or, for a socket set, on any contained
    //  socket).  Returns 1 if ready, 0 on timeout, or -1 on error.
    var ready: Int = socket.select(forReading: 5000).intValue
    if ready < 0 {
        print("\(socket.lastErrorText!)")
        return
    }

    if ready != 1 {
        print("No data became available before the timeout.")
        return
    }

    print("The socket has data ready to read.")

}