/// <summary>
/// Get information about a Google OAuth 2.0 token
/// </summary>
/// <param name="token">Google OAuth 2.0 token</param>
/// <returns>Google OAuth 2.0 token information</returns>
public static TokenInfoJson GetTokenInfo(TokenJson token)
{
TokenInfoJson tokenInfo;
if (token == null)
{
throw new ArgumentNullException("token");
}
if (token.access_token == null || token.access_token.Length == 0)
{
throw new ArgumentException("token");
}
string endpoint = _baseUrl + "v2/tokeninfo?access_token=" + token.access_token;
using (WebClient client = new WebClient())
{
client.Encoding = System.Text.Encoding.UTF8;
client.Headers[HttpRequestHeader.Authorization] = token.GetAuthorizationHeader();
try
{
var content = client.DownloadString(endpoint);
tokenInfo = JsonConvert.DeserializeObject <TokenInfoJson>(content);
}
catch (System.Net.WebException e)
{
//invalid token
throw new ArgumentException("Unable to connect to Google", e);
}
}
return(tokenInfo);
}
/// <summary>
/// Revoke a Google OAuth 2.0 token so it can no longer be used to connect to Google. It's ok if the token is invalid or has already expired.
/// </summary>
/// <param name="token">Google OAuth 2.0 token</param>
public static void RevokeToken(TokenJson token)
{
if (token != null && token.access_token != null && token.access_token.Length > 0)
{
string endpoint = "https://accounts.google.com/o/oauth2/revoke?token=" + token.access_token;
using (WebClient client = new WebClient())
{
client.Encoding = System.Text.Encoding.UTF8;
client.Headers[HttpRequestHeader.Authorization] = token.GetAuthorizationHeader();
try
{
var content = client.DownloadString(endpoint);
}
catch (System.Net.WebException e)
{
//ignore this exception; it means the token already expired or was invalid
}
}
}
}
/// <summary>
/// Get the user's basic profile, as determined by Google
/// </summary>
/// <param name="token">A valid, unexpired access token provided by Google</param>
/// <returns>A user's basic Google profile</returns>
public static UserJson GetUserInfo(TokenJson token)
{
UserJson user;
string endpoint = _baseUrl + "v2/userinfo";
using (WebClient client = new WebClient())
{
client.Encoding = System.Text.Encoding.UTF8;
client.Headers[HttpRequestHeader.Authorization] = token.GetAuthorizationHeader();
try
{
var content = client.DownloadString(endpoint);
user = JsonConvert.DeserializeObject <UserJson>(content);
}
catch (System.Net.WebException e)
{
throw new ArgumentException("Unable to connect to Google", e);
}
}
return(user);
}
