public async Task <string> GetToken()
{
if (!m_IsInit)
{
throw new InvalidOperationException($"{GetType().Name} must be initialised before first usage. Ensure you call {nameof(Init)}() first");
}
;
if (m_CurrentAuthState.IsExpiring())
{
m_CurrentAuthState = await m_GoogleLogin.GetNewAccessToken(m_CurrentAuthState);
}
return(await Task.FromResult(m_CurrentAuthState.AccessToken));
}
public async Task <bool> Init()
{
m_Logger.LogDebug("Debug Check");
m_Logger.LogInformation("Authenticating");
m_CurrentAuthState = await m_GoogleLogin.DoOAuth(m_GoogleScope);
if (m_CurrentAuthState == null)
{
m_Logger.LogError("Authentication Failed");
return(false);
}
m_Logger.LogInformation("Authentication succeeded");
m_IsInit = true;
return(true);
}
public async Task <GoogleAuthState> GetNewAccessToken(GoogleAuthState googleAuthState)
{
Output("Getting new access token via refresh token...");
// builds the request
// ReSharper disable once UseStringInterpolation
var tokenRequestBody = string.Format("client_id={0}&client_secret={1}&refresh_token={2}&grant_type=refresh_token",
m_ClientId,
m_ClientSecret,
googleAuthState.RefreshToken
);
// sends the request
var tokenRequest = (HttpWebRequest)WebRequest.Create(_TOKEN_ENDPOINT);
tokenRequest.Method = "POST";
tokenRequest.ContentType = "application/x-www-form-urlencoded";
tokenRequest.Accept = "Accept=text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
var byteVersion = Encoding.ASCII.GetBytes(tokenRequestBody);
tokenRequest.ContentLength = byteVersion.Length;
var stream = tokenRequest.GetRequestStream();
await stream.WriteAsync(byteVersion, 0, byteVersion.Length);
stream.Close();
try
{
// gets the response
var tokenResponse = await tokenRequest.GetResponseAsync();
// ReSharper disable once AssignNullToNotNullAttribute
using var reader = new StreamReader(tokenResponse.GetResponseStream());
// reads response body
var responseText = await reader.ReadToEndAsync();
Output(responseText);
// converts to dictionary
var tokenEndpointDecoded = JsonConvert.DeserializeObject <Dictionary <string, string> >(responseText);
return(new GoogleAuthState(tokenEndpointDecoded["access_token"],
int.Parse(tokenEndpointDecoded["expires_in"]),
googleAuthState.RefreshToken
));
}
catch (WebException ex)
{
if (ex.Status != WebExceptionStatus.ProtocolError)
{
return(null);
}
if (!(ex.Response is HttpWebResponse response))
{
return(null);
}
Output("HTTP: " + response.StatusCode);
// ReSharper disable once AssignNullToNotNullAttribute
using var reader = new StreamReader(response.GetResponseStream());
var responseText = await reader.ReadToEndAsync();
Output(responseText);
}
return(null);
}
