public bool AddCredential(string credentialType, string accessToken, DateTime? expires, string renewalToken = null)
{
bool exists = false;
UserCredential credential;
// TODO: encrypt token
if (this.UserCredentials.Any(uc => uc.CredentialType == credentialType))
{ // update existing token
credential = this.UserCredentials.Single<UserCredential>(uc => uc.CredentialType == credentialType);
exists = true;
}
else
{ // add new token
credential = new UserCredential()
{
UserID = this.ID,
CredentialType = credentialType,
};
this.UserCredentials.Add(credential);
}
credential.AccessToken = accessToken;
credential.AccessTokenExpiration = expires;
if (renewalToken != null) { credential.RenewalToken = renewalToken; }
credential.LastModified = DateTime.UtcNow;
return exists;
}
UserCredential RenewAccessToken(UserCredential googleConsent)
{
string format = "client_id={0}&client_secret={1}&refresh_token={2}&grant_type=refresh_token";
string formParams = string.Format(format,
Uri.EscapeDataString(GoogleClient.ID),
Uri.EscapeDataString(GoogleClient.Secret),
Uri.EscapeDataString(googleConsent.RenewalToken));
byte[] byteArray = Encoding.ASCII.GetBytes(formParams);
const string googleOAuth2TokenServiceUrl = "https://accounts.google.com/o/oauth2/token";
WebRequest request = WebRequest.Create(googleOAuth2TokenServiceUrl);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = byteArray.Length;
Stream outStream = request.GetRequestStream();
outStream.Write(byteArray, 0, byteArray.Length);
outStream.Close();
try
{
WebResponse response = request.GetResponse();
HttpStatusCode responseStatus = ((HttpWebResponse)response).StatusCode;
Stream inStream = response.GetResponseStream();
StreamReader reader = new StreamReader(inStream);
string jsonToken = reader.ReadToEnd();
JsonGoogleToken token = JsonSerializer.Deserialize<JsonGoogleToken>(jsonToken);
googleConsent.AccessToken = token.access_token;
googleConsent.AccessTokenExpiration = DateTime.UtcNow.AddSeconds(token.expires_in);
storage.SaveChanges();
reader.Close();
inStream.Close();
response.Close();
}
catch (Exception e)
{
TraceLog.TraceException("Could not refresh Google access token", e);
}
return googleConsent;
}