protected void RefreshAuthToken()
{
lock (AccessTokenLock)
{
if (AccessTokenExpires < DateTime.Now)
{
var req = HTTPHelper.CreateRequest(null, OAuthTokenRequestUri);
var reqdata = new
{
refresh_token = RefreshToken,
client_id = ClientId,
client_secret = ClientSecret,
grant_type = "refresh_token"
};
var respdata = HTTPHelper.ToJson(HTTPHelper.SendUrlEncodedPostData(req, reqdata));
_AccessToken = respdata.access_token;
_TokenType = respdata.token_type;
AccessTokenExpires = DateTime.Now.Add(new TimeSpan((respdata.expires_in - 60) * 10000000));
}
}
}