public async Task <bool> RetrieveAuthenticationFromRedirectAsync(Uri uri)
{
bool authenticationFound = false;
if (string.Equals(uri.Authority, this.RedirectUrl.Authority, StringComparison.OrdinalIgnoreCase) &&
string.Equals(uri.AbsolutePath, this.RedirectUrl.AbsolutePath, StringComparison.OrdinalIgnoreCase))
{
DesignTimeAuthenticationViewModel.CheckAuthenticationErrors(uri);
string[] parameters = uri.Fragment.TrimStart('#').Split('&');
this.Authentication.AccessToken = DesignTimeAuthenticationViewModel.RetrieveParameterValue(parameters, "access_token=");
this.Authentication.RefreshToken = DesignTimeAuthenticationViewModel.RetrieveParameterValue(parameters, "refresh_token=");
this.Authentication.InstanceUrl = DesignTimeAuthenticationViewModel.RetrieveParameterValue(parameters, "instance_url=");
try
{
string id = DesignTimeAuthenticationViewModel.RetrieveParameterValue(parameters, "id=");
await this.RetrieveIdInfoAsync(id);
}
catch (Exception)
{
this.Authentication.AccessToken = null;
this.Authentication.RefreshToken = null;
this.Authentication.InstanceUrl = null;
throw;
}
authenticationFound = true;
}
return(authenticationFound);
}
private static void CheckAuthenticationErrors(Uri uri)
{
string[] parameters = uri.Query.TrimStart('?').Split('&');
string error = DesignTimeAuthenticationViewModel.RetrieveParameterValue(parameters, "error=");
if (error != null)
{
string errorDescription = DesignTimeAuthenticationViewModel.RetrieveParameterValue(parameters, "error_description=");
// In the unexpected case when there is no error description, use the error code.
string exceptionMessage = errorDescription == null ? error : errorDescription;
throw new InvalidOperationException(exceptionMessage);
}
}