Running into a weird auth loop in my Azure Function. It’s a C# worker using the Genesys Cloud .NET SDK (GenesysCloudPlatformSDK). I’ve got a singleton ApiException handler that catches 401s and triggers a token refresh via OAuthApi.GenerateToken(). The refresh succeeds, returns a new access token, and I update the client config. But the very next call to UsersApi.GetUsers() still throws a 401 Unauthorized.
Here’s the kicker: the token’s expires_in is 3600 seconds, and the refresh happens well before expiry. I checked the token payload in Postman, and it’s valid. The issue seems to be timing. My Azure Function host is in Central US. Genesys Cloud endpoints are… well, global. I suspect there’s a clock skew between the function host and the GC auth server. The SDK checks if the token is expired locally before sending it. If my server time is slightly ahead of GC’s time, it thinks the token is still valid locally, sends the old/expired token, and GC rejects it. Then the 401 handler refreshes, but by the time the new token is ready, the local clock might have shifted again, or the retry logic is flawed.
// Simplified refresh logic
if (ex.StatusCode == (int)HttpStatusCode.Unauthorized)
{
var tokenResp = await _oauthApi.GenerateTokenAsync(_clientId, _clientSecret);
_config.AccessToken = tokenResp.AccessToken;
_config.ExpiresAt = DateTime.UtcNow.AddSeconds(tokenResp.ExpiresIn); // Local time
// Retry request here
}
The docs say: “The SDK manages token expiration automatically.” But this automatic management relies on DateTime.UtcNow. If UtcNow is off by even a few seconds relative to the auth server, we get a race condition.
Is there a way to force the SDK to use the server’s time for expiry checks? Or should I stop relying on the SDK’s automatic refresh and just implement a hard refresh interval (e.g., every 3500 seconds)? The current setup feels brittle. We’ve had this happen twice this week during peak load. The error log just says 401 Unauthorized with no hint about the clock difference.
[2023-10-27T14:22:01.123Z] Error: GenesysCloudPlatformSDK.Model.ApiException: HTTP 401
at GenesysCloudPlatformSDK.Api.UsersApi.GetUsersAsync(...)
Any ideas on how to handle this without rewriting the auth layer?