// if HttpListener is not used, you can remove async
private async void FormOauth_Load(object sender, EventArgs e)
{
OauthBrowser.DocumentTitleChanged += (x, y) => { this.Text = OauthBrowser.DocumentTitle; };
//start to open Web OAUTH login web page.
OauthWrapper.AuthorizationCode = "";
// Http Listener is Google recommended solution for desktop app,
// and MS OAUTH supports it as well, but you need to add http://127.0.0.1 to
// Azure portal -> Your app -> Authentication -> Mobile and desktop applications: redirect Uri, please check the following URI.
if (!OauthWrapper.Provider.UseHttpListener)
{
OauthWrapper.Provider.ResetLocalRedirectUri();
OauthBrowser.Navigate(OauthWrapper.Provider.GetFullAuthUri());
return;
}
string httpRedirectUri = GetHttpRedirectUri();
OauthWrapper.Provider.RedirectUri = httpRedirectUri;
OauthBrowser.Navigate(OauthWrapper.Provider.GetFullAuthUri());
try
{
await GetCodefromHttpListener(httpRedirectUri);
}
catch (Exception ep)
{
MessageBox.Show(ep.Message);
}
finally
{
this.Close();
}
}
private async void OauthBrowser_NavigationCompleted(WebView sender, WebViewNavigationCompletedEventArgs args)
{
if (OauthViewer.Visibility == Visibility.Collapsed)
{
return;
}
OauthProgress.Visibility = Visibility.Collapsed;
if (!args.IsSuccess)
{
MessageDialog dlg = new MessageDialog(args.WebErrorStatus.ToString() + ": " + args.Uri.AbsoluteUri);
await dlg.ShowAsync();
ShowOauthPanel(false);
return;
}
if (string.IsNullOrWhiteSpace(args.Uri.Query))
{
return;
}
string code = string.Empty;
try
{
WwwFormUrlDecoder decoder = new WwwFormUrlDecoder(args.Uri.Query);
code = decoder.GetFirstValueByName("approvalCode");
}
catch { }
if (string.IsNullOrWhiteSpace(code))
{
code = await OauthBrowser.InvokeScriptAsync("eval",
new string[] { "(function() { var el = document.getElementById(\"code\"); return (el==null)?'':el.value; })()" });
}
if (string.IsNullOrWhiteSpace(code))
{
return;
}
_oauthWrapper.AuthorizationCode = code;
ShowOauthPanel(false);
}
async Task GetCodefromHttpListener(string httpRedirectUri)
{
_httpListener = new HttpListener();
_httpListener.Prefixes.Add(httpRedirectUri);
_httpListener.Start();
try
{
var context = await _httpListener.GetContextAsync();
string responseString = string.Format("<html><head><title>Authorization is completed</title></head><body>AuthorizationCode is returned, please close current window and return to the app.</body></html>");
var buffer = Encoding.UTF8.GetBytes(responseString);
var response = context.Response;
response.ContentLength64 = buffer.Length;
var responseOutput = response.OutputStream;
await responseOutput.WriteAsync(buffer, 0, buffer.Length);
responseOutput.Close();
_httpListener.Stop();
OauthBrowser.Stop();
if (context.Request.QueryString.Get("error") != null)
{
MessageBox.Show("OAuth authorization error: {0}.", context.Request.QueryString.Get("error"));
return;
}
var code = context.Request.QueryString.Get("code");
OauthWrapper.AuthorizationCode = code;
}
catch (ObjectDisposedException)
{
// this exception is thrown by closing window, don't handle it.
}
}
private async Task _doOauthAsync()
{
// AccessToken is existed, if it is not expired, use it directly, otherwise refresh it.
if (!string.IsNullOrEmpty(_oauthWrapper.Provider.AccessToken))
{
if (!_oauthWrapper.IsAccessTokenExpired)
{
return;
}
TextStatus.Text = "Refreshing access token ...";
try
{
await _oauthWrapper.RefreshAccessTokenAsync();
return;
}
catch
{
TextStatus.Text = "Failed to refresh access token, try to get a new access token ...";
}
}
OauthBrowser.Navigate(
new Uri(_oauthWrapper.Provider.GetFullAuthUri())
);
ShowOauthPanel(true);
while (OauthViewer.Visibility != Visibility.Collapsed)
{
await Task.Delay(100);
}
TextStatus.Text = "Requesting access token ...";
await _oauthWrapper.RequestAccessTokenAndUserEmailAsync();
}
private void FormOauth_Load(object sender, EventArgs e)
{
//start to open Gmail OAUTH login web page.
OauthBrowser.Navigate(OauthWrapper.OauthProvider.GenerateFullAuthUri());
}
private async Task _doOauthAsync()
{
if (_oauthWrapper == null)
{
/*
* To use Google OAUTH in your application, you must create a project in Google Developers Console.
*
* - Create your project at https://console.developers.google.com/project.
* - Select your project -> APIs & Services -> Dashboard -> Credentials;
* - Credentials -> Create Credentials -> OAuth client ID -> Web application or Other (Desktop Application).
* It depends on your application type.
*
* - Input a name for your application, input your current ASP/ASP.NET URL at Authorized redirect URIs,
* for example: http://localhost/gmailoauth/default.aspx. (Desktop Application doesn't require this step)
* Click "Create", you will get your client id and client secret.
*
* - Finally you can also set detail information for your project at Credentials -> OAuth consent screen.
* - If you used https://mail.google.com scope, you should verify your application that is inroduced in cosent screen.
* If you don't verify your application, your application is limited by some conditions.
*
* You must apply for your client id and client secret, don't use the client id in the sample project, because it is limited now.
* If you got "This app isn't verified" information, please click "advanced" -> Go to ... for test.
*/
OauthProviderInterface provider = GoogleOauthProvider.Create("1072602369179-aru4rj97ateiho9rt4pf5i8l1r01mc16.apps.googleusercontent.com",
"Lnw8r5FvfKFNS_CSEucbdIE-");
_oauthWrapper = new OauthDesktopWrapper(provider);
}
// AccessToken is existed, if it is not expired, use it directly, otherwise refresh it.
if (!string.IsNullOrEmpty(_oauthWrapper.OauthProvider.AccessToken))
{
if (!_oauthWrapper.IsAccessTokenExpired)
{
return;
}
TextStatus.Text = "Refreshing access token ...";
try
{
await _oauthWrapper.RefreshAccessTokenAsync();
return;
}
catch
{
TextStatus.Text = "Failed to refresh access token, try to get a new access token ...";
}
}
OauthBrowser.Navigate(
new Uri(_oauthWrapper.OauthProvider.GenerateFullAuthUri())
);
ShowOauthPanel(true);
while (OauthViewer.Visibility != Visibility.Collapsed)
{
await Task.Delay(100);
}
TextStatus.Text = "Requesting access token ...";
await _oauthWrapper.RequestAccessTokenAndUserEmailAsync();
}
