private IEnumerator MaintainAccessToken()
{
TimeSpan refreshBackoff = TimeSpan.FromSeconds(10);
var rand = new Random();
while (true)
{
if (refreshBackoff >= OauthLoginSession.MaxBackoffInterval)
{
yield break;
}
if (this.tokenData == null || DateTime.UtcNow < this.nextRefreshTime)
{
yield return(new WaitForSeconds(OauthLoginSession.WaitExpiryDelay / 1000f));
continue;
}
Result <TokenData> refreshResult = null;
yield return(RefreshToken(result => refreshResult = result));
if (!refreshResult.IsError)
{
this.nextRefreshTime = OauthLoginSession.ScheduleNormalRefresh(this.tokenData.expires_in);
}
else
{
refreshBackoff = OauthLoginSession.CalculateBackoffInterval(refreshBackoff, rand.Next(1, 60));
this.nextRefreshTime = DateTime.UtcNow + refreshBackoff;
}
}
}
