自动重试System.Net.Http.HttpClient

Question

I know Entity Framework has a 'Connection Resiliency and Retry Logic' mechanism to work with unreliable networks.

Is there also such a thing for the System.Net.Http.HttpClient? So a sort of an automatic retry mechanism so when the connections gets lost or a timeout occurs, then it will retry for x times.

Is that possible?

Answer 1

As far as I know, there is no such mechanism. But you can write yourself an event, checking the connectivity all x milliseconds. like

public class CheckInternet
{
    public CheckInternet()
    {
        Timer t1 = new Timer();
        t1.Interval = 1000;
        t1.Tick += T1_Tick;
        t1.Start();
    }

    private void T1_Tick(object sender, EventArgs e)
    {
        var ping = new System.Net.NetworkInformation.Ping();
        var result = ping.Send("www.google.com");
        if (result.Status != System.Net.NetworkInformation.IPStatus.Success)
        {
            // Your code to reconnect here
        }
    }
    public event EventHandler CheckConnectivity;
    private void OnCheckConnectivity()
    {
        CheckConnectivity?.Invoke(this, new EventArgs());
    }
}

Now just implement this to your other class use

CheckInternet cki = new CheckInternet();
cki.CheckConnectivity += new cki_CheckConnectivity;