private void AuthorizeWithACS(string refreshToken = null)
{
var authorizeRequest = BuildAccessTokenRequest(refreshToken);
var serializer = new OAuthMessageSerializer();
var encodedQueryFormat = serializer.GetFormEncodedQueryFormat(authorizeRequest);
HttpWebRequest httpWebRequest = WebRequest.Create(authorizeRequest.BaseUri) as HttpWebRequest;
httpWebRequest.Method = "POST";
httpWebRequest.ContentType = "application/x-www-form-urlencoded";
StreamWriter streamWriter = new StreamWriter(httpWebRequest.GetRequestStream());
streamWriter.Write(encodedQueryFormat);
streamWriter.Close();
try
{
var message =
serializer.Read(httpWebRequest.GetResponse() as HttpWebResponse) as AccessTokenResponse;
if (message != null)
{
CurrentAccessToken = message;
LastAccessTokenRefresh = DateTime.UtcNow;
}
}
catch (WebException webex)
{
var message = serializer.Read(webex.Response as HttpWebResponse);
var endUserAuthorizationFailedResponse = message as EndUserAuthorizationFailedResponse;
if (endUserAuthorizationFailedResponse != null)
{
throw new AuthenticationException(endUserAuthorizationFailedResponse.ErrorDescription);
}
var userAuthorizationFailedResponse = message as ResourceAccessFailureResponse;
if (userAuthorizationFailedResponse != null)
{
throw new AuthenticationException(userAuthorizationFailedResponse.ErrorDescription);
}
throw;
}
}
