/// <summary>
/// Create an HTTP Handler that supports OAuth user authentication.
/// </summary>
/// <param name="authBaseUri">The base auth URI e.g. https://auth.alitudeangel.com</param>
/// <param name="clientId">Your client ID</param>
/// <param name="clientSecret">Your client secret</param>
/// <param name="scopes">Requested scopes</param>
/// <param name="existingState">(optional) An existing state object from a previous session. May be null.</param>
/// <param name="requireUserToken">true to aquire a user token, false to get a client only token.</param>
/// <param name="redirectUri">The redirect URI to use for user token auth. Must match the registered URI for your client ID.</param>
/// <param name="codeProvider">Implementation to use to get an authorization code URI from an auth login URI.</param>
/// <returns>
/// A <see cref="ClientHandlerInfo"/> object that contains the auth state and the handler. The auth state may be persisted and passed
/// back in on future runs of the application to save login state.
/// </returns>
public static ClientHandlerInfo Create(
string authBaseUri,
string clientId,
string clientSecret,
IEnumerable<string> scopes,
AuthorizationState existingState,
bool requireUserToken,
string redirectUri,
IAuthorizeCodeProvider codeProvider)
{
AuthorizationServerDescription serverDescription = GetServerDescription(authBaseUri);
ClientBase client;
IAuthorizationState state = existingState;
if (requireUserToken)
{
if (codeProvider == null || string.IsNullOrEmpty(redirectUri))
{
throw new ArgumentNullException(nameof(codeProvider),
$"{nameof(codeProvider)} or {nameof(redirectUri)} cannot be null if {nameof(requireUserToken)} is true.");
}
var userClient = new UserAgentClient(serverDescription, clientId, ClientCredentialApplicator.PostParameter(clientSecret));
if (state == null)
{
// Open browser here
var returnTo = new Uri(redirectUri);
Uri uri = userClient.RequestUserAuthorization(scopes, returnTo: returnTo);
Uri result = codeProvider.GetCodeUri(uri, returnTo).Result;
state = new AuthorizationState {Callback = returnTo};
state.Scope.AddRange(scopes);
state = userClient.ProcessUserAuthorization(result, state);
}
client = userClient;
}
else
{
client = new WebServerClient(serverDescription, clientId, ClientCredentialApplicator.PostParameter(clientSecret));
state = state ?? client.GetClientAccessToken(scopes);
}
return new ClientHandlerInfo(client.CreateAuthorizingHandler(state), state);
}
public Uri GetAuthorizationUri()
{
_endPoint = "https://start.exactonline.com";
_authorization = new AuthorizationState
{
Callback = new Uri("http://localhost:19648/home/exoauth2")
};
var serverDescription = new AuthorizationServerDescription
{
AuthorizationEndpoint = new Uri(string.Format("{0}/api/oauth2/auth", _endPoint)),
TokenEndpoint = new Uri(string.Format("{0}/api/oauth2/token", _endPoint))
};
_oAuthClient = new UserAgentClient(serverDescription, "eb93389b-9532-46ca-9b24-898a38e91c22", "jYzWXVFiE87C");
_oAuthClient.ClientCredentialApplicator = ClientCredentialApplicator.PostParameter("jYzWXVFiE87C");
return _oAuthClient.RequestUserAuthorization(_authorization);
}
public string RetrieveAuthorization(UserAgentClient client, IAuthorizationState authorizationState)
{
if (!HttpListener.IsSupported)
{
throw new NotSupportedException("HttpListener is not supported by this platform.");
}
// Create a HttpListener for the specified url.
//string url = string.Format(LoopbackCallback, GetRandomUnusedPort(), Util.ApplicationName);
string url = string.Format(LoopbackCallback, GetRandomUnusedPort());
authorizationState.Callback = new Uri(url);
var webserver = new HttpListener();
webserver.Prefixes.Add(url);
// Retrieve the authorization url.
Uri authUrl = client.RequestUserAuthorization(authorizationState);
try
{
// Start the webserver.
webserver.Start();
// Open the browser.
Process.Start(authUrl.ToString() + "&access_type=offline&approval_prompt=force");
// Wait for the incoming connection, then handle the request.
return HandleRequest(webserver.GetContext());
}
catch (HttpListenerException ex)
{
throw new NotSupportedException("The HttpListener threw an exception.", ex);
}
finally
{
// Stop the server after handling the one request.
webserver.Stop();
}
}
public string RetrieveAuthorization(UserAgentClient client, IAuthorizationState authorizationState)
{
// Create the Url.
authorizationState.Callback = new Uri(OutOfBandCallback);
Uri url = client.RequestUserAuthorization(authorizationState);
// Show the dialog.
if (!Application.RenderWithVisualStyles)
{
Application.EnableVisualStyles();
}
Application.DoEvents();
string authCode = OAuth2AuthorizationDialog.ShowDialog(url);
Application.DoEvents();
if (string.IsNullOrEmpty(authCode))
{
return null; // User cancelled the request.
}
return authCode;
}
public static Uri GetAuthorization(UserAgentClient appClient)
{
return appClient.RequestUserAuthorization(GetState());
}
