private void client_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error != null)
{
if (!TryNextURL((int)e.UserState))
{
InvokeUpdateInfoCallbacksAndClear(null, null);
}
}
else
{
AppInfo info = AppInfo.FromJson(e.Result);
if (info == null)
{
if (!TryNextURL((int)e.UserState))
{
InvokeUpdateInfoCallbacksAndClear(null, null);
}
return;
}
if (!LauncherSettings.AppID.Equals(info.appId))
{
MessageBox.Show("Invalid update mirror: appID does not match local value!", "An error occured", MessageBoxButtons.OK, MessageBoxIcon.Error);
if (!TryNextURL((int)e.UserState))
{
InvokeUpdateInfoCallbacksAndClear(null, null);
}
return;
}
InvokeUpdateInfoCallbacksAndClear(info, UpdateHost.GetUpdateHosts()[(int)e.UserState]);
}
}
private bool TryNextURL(int currentIndex)
{
int nextIndex = (currentIndex) + 1;
if (nextIndex < UpdateHost.GetUpdateHosts().Length)
{
client.DownloadStringAsync(UpdateHost.GetUpdateHosts()[nextIndex].AppInfoURL, nextIndex);
return(true);
}
return(false);
}
public void RetrieveAppInfo(Action <AppInfo, UpdateHost> callback)
{
client.DownloadStringCompleted += client_DownloadStringCompleted;
appInfoCallbacks.Add(callback);
client.DownloadStringAsync(UpdateHost.GetUpdateHosts()[0].AppInfoURL, 0);
}
