/// <summary>
/// Discards the user session.
/// Note that this does not log the user out of any web services.
/// </summary>
public async Task Invalidate()
{
using (await _lock.LockAsync())
{
_sessionToken = null;
}
}
// ReSharper disable ExceptionNotThrown
/// <exception cref="WebException">Request failed due to a bad connection (e.g. no internet).</exception>
/// <exception cref="HttpRequestException">Recieved an error status code that could not be recovered from.</exception>
/// <exception cref="InvalidUsernameAndPasswordException"></exception>
// ReSharper restore ExceptionNotThrown
public async Task <CookieCollection> GetSessionCookies()
{
using (await _lock.LockAsync())
{
if (_sessionToken != null &&
SystemClock.Instance.GetCurrentInstant() < _sessionTokenExpiryDate)
{
return(_sessionToken.ToCookieCollection());
}
var credentialsSource = _challengeResponseFactory();
Exception lastAuthException = null;
var credentialsStream = credentialsSource.Item1;
var challengeResponsesStream = credentialsSource.Item2;
challengeResponsesStream.OnNext(FactorioAuthResult.None);
await credentialsStream.ForEachAsync(async credentials =>
{
// This is an async void method, so any unhandled exceptions
// will be unhandled in the thread and crash the application.
// Catch and store them in the closure variable forEachException
// and handle it there.
// The last exception will bubble up, as it represents the users last attempt
// to auth before canceling.
try
{
if (credentials == null)
{
challengeResponsesStream.OnError(new ArgumentNullException());
}
_sessionToken = await _client.Authorize(credentials);
// Clear the exception because we authed successfully
lastAuthException = null;
_sessionTokenExpiryDate = SystemClock.Instance.GetCurrentInstant() + SessionTokenValidDuration;
challengeResponsesStream.OnNext(FactorioAuthResult.Success);
}
catch (InvalidUsernameAndPasswordException ex)
{
lastAuthException = ex;
challengeResponsesStream.OnError(ex);
}
catch (HttpRequestException ex)
{
Console.WriteLine(ex.Message);
lastAuthException = ex;
challengeResponsesStream.OnError(ex);
}
catch (WebException ex)
{
Console.WriteLine(ex.Message);
lastAuthException = ex;
challengeResponsesStream.OnError(ex);
}
catch (Exception ex)
{
challengeResponsesStream.OnError(ex);
lastAuthException = ex;
}
});
if (lastAuthException != null)
{
throw lastAuthException;
}
return(_sessionToken.ToCookieCollection());
}
}