Go

Get Current Date/Time from NIST Time Server

See more Socket/SSL/TLS Examples

Demonstrates using Chilkat Socket to connect to an NIST time server and (using the old Time Protocol (RFC 868)), will read the current GMT time.

Note: This is not necessarily the very best means for getting the current date/time. The most commonly used time protocol is the Network Time Protocol (RFC-1305).

Go

    success := false

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    socket := chilkat.NewSocket()

    // Connect to an NIST time server and read the current date/time
    maxWaitMs := 4000
    useTls := false
    success = socket.Connect("time-c.nist.gov",37,useTls,maxWaitMs)
    if success != true {
        fmt.Println(socket.LastErrorText())
        socket.DisposeSocket()
        return
    }

    // The time server will send a big-endian 32-bit integer representing
    // the number of seconds since since 00:00 (midnight) 1 January 1900 GMT.
    // The ReceiveInt32 method will receive a 4-byte integer, but returns
    // true or false to indicate success.  If successful, the integer
    // is obtained via the ReceivedInt property.
    bigEndian := true
    success = socket.ReceiveInt32(bigEndian)
    if success != true {
        fmt.Println(socket.LastErrorText())
        socket.DisposeSocket()
        return
    }

    dt := chilkat.NewCkDateTime()
    dt.SetFromNtpTime(socket.ReceivedInt())

    // Show the current local date/time
    bLocalTime := true
    fmt.Println("Current local date/time: ", *dt.GetAsRfc822(bLocalTime))

    maxWaitMs = 10
    socket.Close(maxWaitMs)

    socket.DisposeSocket()
    dt.DisposeCkDateTime()