(Go) Check Internet Connectivity

Demonstrates an efficient way to test for Internet connectivity.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

    success := false

    socket := Socket_Ref.html">chilkat.NewSocket()
    // 1. Use a reliable Anycast IP. 
    //    8.8.8.8 (Google) or 1.1.1.1 (Cloudflare) are the industry standards.
    targetIp := "8.8.8.8"

    // 2. Use Port 53 (DNS). 
    //    DNS servers typically listen on TCP Port 53 as well as UDP. 
    //    (Alternatively, use port 443 if you suspect port 53 is blocked).
    port := 53

    // 3. Disable SSL (0). 
    //    We are not doing a handshake, just a TCP connection.
    ssl := false

    // 4. Short Timeout (1500ms).
    //    If you can't reach Google in 1.5 seconds, the connection is 
    //    likely too poor for practical use anyway.
    timeoutMs := 1500

    // Connect
    success = socket.Connect(targetIp,port,ssl,timeoutMs)
    if success == false {
        fmt.Println(socket.LastErrorText())
        socket.DisposeSocket()
        return
    }

    socket.Close(10)

    fmt.Println("We have Internet connectivity.")

    socket.DisposeSocket()