In this article Access Mail Services using OAuth|Documentation in particular this code, what is 929645059575.apps.googleusercontent.com ? Is it unique to the aspose demo or a fixed webaddress for gmail?
internal static string GetAccessToken(string authorizationCode)
{
string actionUrl = “https://accounts.google.com/o/oauth2/token”;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(actionUrl);
request.CookieContainer = new CookieContainer();
request.Method = “POST”;
request.ContentType = “application/x-www-form-urlencoded”;
string encodedParameters = string.Format(
“client_id={1}&code={0}&client_secret={2}&redirect_uri={3}&grant_type={4}”,
HttpUtility.UrlEncode(authorizationCode),
HttpUtility.UrlEncode(“929645059575.apps.googleusercontent.com 1”),
HttpUtility.UrlEncode(“USnH5eQRsC4XrjJbpGG7WVq5”),
HttpUtility.UrlEncode(“urn:ietf:wg:oauth:2.0:oob”),
HttpUtility.UrlEncode(“authorization_code”)
);