Here, I am using user id generated by facebook in place of appid . Am I correct here??
As I wanted to get access token with the help of user name and password for my application designed in windows forms. I am using below code to fetch it. Please, give me any better solution to fetch access token.
string appId = userid.ToString();
string[] extendedPermissions = new[] { "publish_stream", "offline_access" };
var oauth = new FacebookOAuthClient { ClientId = appId };
var parameters = new Dictionary<string, object> {
{ "response_type", "token" }, { "display", "popup" } };
if (extendedPermissions != null && extendedPermissions.Length > 0)
{
var scope = new StringBuilder();
scope.Append(string.Join(",", extendedPermissions));
parameters["scope"] = scope.ToString();
}
var loginUrl = oauth.GetLoginUrl(parameters);
wbTestWindow.Navigate(loginUrl);
// this webBrowser's related navigated function
private void wbTestWindow_Navigated(object sender, WebBrowserNavigatedEventArgs e)
{
FacebookOAuthResult result;
if (FacebookOAuthResult.TryParse(e.Url, out result))
{
if (result.IsSuccess)
{
var accesstoken = result.AccessToken;
}
else
{
var errorDescription = result.ErrorDescription;
var errorReason = result.ErrorReason;
}
}
}
Related
Code is as follows
startup auth:
app.UseFacebookAuthentication(new FacebookAuthenticationOptions
{
AppId = "xxx",
AppSecret = "xxx",
BackchannelHttpHandler = new FacebookBackChannelHandler(),
UserInformationEndpoint = "https://graph.facebook.com/v2.4/me?fields=id,name,email,first_name,last_name,location",
Scope = { "email" }
});
in the accountcontroler RegisterExternal class i call the following:
var info = await AuthenticationManager_GetExternalLoginInfoAsync_WithExternalBearer();
Which is this class:
private async Task<ExternalLoginInfo> AuthenticationManager_GetExternalLoginInfoAsync_WithExternalBearer()
{
ExternalLoginInfo loginInfo = null;
var result = await Authentication.AuthenticateAsync(DefaultAuthenticationTypes.ExternalBearer);
if (result != null && result.Identity != null)
{
var idClaim = result.Identity.FindFirst(ClaimTypes.NameIdentifier);
if (idClaim != null)
{
loginInfo = new ExternalLoginInfo()
{
DefaultUserName = result.Identity.Name == null ? "" : result.Identity.Name.Replace(" ", ""),
Login = new UserLoginInfo(idClaim.Issuer, idClaim.Value),
};
}
}
return loginInfo;
}
This is because the RegisterExternal class on default will use authentication type cookie. Whenever i use it it will return null, so after surfing the web I've noticed it is necessary add this code which in turn will use the bearer for authentication, this will result in a reply where the username and the identity are no longer null, thus authorized. (see picture below)
Return object (username and login)
But, when i want to claim the email, i cannot do this. It will always return null no matter what i do.
I was running into the same issue and solved it by using the Facebook nuget package to get extra fields.
In my application I have implemented FacebookAuthenticationProvider and overridden the Authenticated(...) method with the following:
public class FacebookAuthProvider : FacebookAuthenticationProvider
{
public override Task Authenticated(FacebookAuthenticatedContext context)
{
var accessTokenClaim = new Claim("ExternalAccessToken", context.AccessToken, "urn:facebook:access_token");
context.Identity.AddClaim(accessTokenClaim);
var extraClaims = GetAdditionalFacebookClaims(accessTokenClaim);
context.Identity.AddClaim(new Claim(ClaimTypes.Email, extraClaims.First(k => k.Key == "email").Value.ToString()));
context.Identity.AddClaim(new Claim("Provider", context.Identity.AuthenticationType));
context.Identity.AddClaim(new Claim(ClaimTypes.Name, context.Identity.FindFirstValue(ClaimTypes.Name)));
var userDetail = context.User;
var link = userDetail.Value<string>("link") ?? string.Empty;
context.Identity.AddClaim(new Claim("link", link));
context.Identity.AddClaim(new Claim("FacebookId", userDetail.Value<string>("id")));
return System.Threading.Tasks.Task.FromResult(0);
}
private static JsonObject GetAdditionalFacebookClaims(Claim accessToken)
{
var fb = new FacebookClient(accessToken.Value);
return fb.Get("me", new { fields = new[] { "email", "first_name", "last_name" } }) as JsonObject;
}
}
My Startup.cs has this within Configuration(IAppBuilder app):
FacebookAuthOptions = new Microsoft.Owin.Security.Facebook.FacebookAuthenticationOptions
{
AppId = "YOUR APP ID",
AppSecret = "YOUR APP SECRET",
Microsoft.Owin.PathString("/Account/ExternalCallBack"), // whatever your external callback url is
Provider = new FacebookAuthProvider()
};
FacebookAuthOptions.Scope.Add("email");
app.UseFacebookAuthentication(FacebookAuthOptions);
I've no idea why the email was not being populated in the first place, but this approach worked for me.
I need some help regarding mvc 5 using the google login provider and getting some youtube data. right now i think i get things a little mixed up. i'm not new to mvc but to version 5's owin middleware features. well, and not experienced in implementing oauth 2.0.
What i want:
Login to my MVC5 Application via Google.
Read some Youtube information from the logged in user.
What i have done so far:
Followed this Google OAuth 2.0 tutorial: Web applications (ASP.NET MVC).
Installed Google.Apis.Auth.MVC via NuGet.
Implemented AppFlowMetadata and AuthCallbackController as described.
Configured the redirect uri to "/AuthCallback/IndexAsync" as described.
Implemented a YoutubeController with the following action just to dump out some data:
public async Task<ActionResult> IndexAsync()
{
var result =
await new AuthorizationCodeMvcApp(this, new AppFlowMetadata())
.AuthorizeAsync(cancellationToken);
if (result.Credential == null)
{
return new RedirectResult(result.RedirectUri);
}
else
{
var service = new YouTubeService(new BaseClientService.Initializer
{
HttpClientInitializer = result.Credential,
ApplicationName = "MyYoutubeApplication"
});
var playlists = service.Playlists.List("contentDetails, snippet");
playlists.Mine = true;
var list = await playlists.ExecuteAsync();
var json = new JavaScriptSerializer().Serialize(list);
ViewBag.Message = json;
return View();
}
}
So what this does, when trying to access /Youtube/IndexAsync is redirecting me to google, asking for my credentials.
when entered, i'm asked if i'm ok with the permission asked by the application. after confirming, i get redirected to my page, showing my /Youtube/IndexAsync page with the requested data. so far so good, but that's not quite what i want.
what (i think) i have done here is that i completely bypassed the asp.net identity system. the user is not logged in to my application let alone registered.
i want the user to log in with google, register in my application and provide access to his youtube data. then, when on a specific page, retrieve data from the user's youtube account.
What i also have tried:
Following this ASP.Net MVC5 Tutorial
This tutorial does not mention the NuGet package "Google.Apis.Auth.MVC" and talks something about a magic "/signin-google" redirect uri".
This also works, but breaks the solution above, complaining about a wrong redirect uri.
When using this approach, it seems not right to me call AuthorizeAsync in YoutubeController again, since i should already be authorized.
So i'm looking for some light in the dark, telling me what i'm mixing all together :) I hope the question is not as confused as i am right now.
I managed to do this using GooglePlus, haven't tried Google. Here's what I did:
Install the nugets:
> Install-Package Owin.Security.Providers
> Install-Package Google.Apis.Youtube.v3
Add this to Startup.auth.cs:
var g = new GooglePlusAuthenticationOptions();
g.ClientId = Constants.GoogleClientId;
g.ClientSecret = Constants.GoogleClientSecret;
g.RequestOfflineAccess = true; // for refresh token
g.Provider = new GooglePlusAuthenticationProvider
{
OnAuthenticated = context =>
{
context.Identity.AddClaim(new Claim(Constants.GoogleAccessToken, context.AccessToken));
if (!String.IsNullOrEmpty(context.RefreshToken))
{
context.Identity.AddClaim(new Claim(Constants.GoogleRefreshToken, context.RefreshToken));
}
return Task.FromResult<object>(null);
}
};
g.Scope.Add(Google.Apis.YouTube.v3.YouTubeService.Scope.YoutubeReadonly);
g.SignInAsAuthenticationType = DefaultAuthenticationTypes.ExternalCookie;
app.UseGooglePlusAuthentication(g);
The above code does two things:
Enable authentication via. Google+
Requests for the access token and the refresh token. The tokens are then added as a claim in the GooglePlus middleware.
Create a method that will store the claims containing the token to the database. I have this in the AccountController.cs file
private async Task StoreGooglePlusAuthToken(ApplicationUser user)
{
var claimsIdentity = await AuthenticationManager.GetExternalIdentityAsync(DefaultAuthenticationTypes.ExternalCookie);
if (claimsIdentity != null)
{
// Retrieve the existing claims for the user and add the google plus access token
var currentClaims = await UserManager.GetClaimsAsync(user.Id);
var ci = claimsIdentity.FindAll(Constants.GoogleAccessToken);
if (ci != null && ci.Count() != 0)
{
var accessToken = ci.First();
if (currentClaims.Count() <= 0)
{
await UserManager.AddClaimAsync(user.Id, accessToken);
}
}
ci = claimsIdentity.FindAll(Constants.GoogleRefreshToken);
if (ci != null && ci.Count() != 0)
{
var refreshToken = ci.First();
if (currentClaims.Count() <= 1)
{
await UserManager.AddClaimAsync(user.Id, refreshToken);
}
}
}
You'll need to call it in 2 places in the AccountController.cs: Once in ExternalLoginCallback:
case SignInStatus.Success:
var currentUser = await UserManager.FindAsync(loginInfo.Login);
if (currentUser != null)
{
await StoreGooglePlusAuthToken(currentUser);
}
return RedirectToLocal(returnUrl);
and once in ExternalLoginConfirmation:
var user = new ApplicationUser { UserName = model.Email, Email = model.Email };
var result = await UserManager.CreateAsync(user);
if (result.Succeeded)
{
result = await UserManager.AddLoginAsync(user.Id, info.Login);
if (result.Succeeded)
{
await StoreGooglePlusAuthToken(user);
await SignInManager.SignInAsync(user, isPersistent: false, rememberBrowser: false);
return RedirectToLocal(returnUrl);
}
}
Now that we've got the users access token and refresh token we can use this to authenticate the user.
I tried a simple search I saw in the examples and it worked:
private async Task<Models.YouTubeViewModel> Search(string searchTerm)
{
var user = (ClaimsPrincipal)Thread.CurrentPrincipal;
var at = user.Claims.FirstOrDefault(x => x.Type == Constants.GoogleAccessToken);
var rt = user.Claims.FirstOrDefault(x => x.Type == Constants.GoogleRefreshToken);
if (at == null || rt == null)
throw new HttpUnhandledException("Access / Refresh Token missing");
TokenResponse token = new TokenResponse
{
AccessToken = at.Value,
RefreshToken = rt.Value
};
var cred = new UserCredential(new GoogleAuthorizationCodeFlow(
new GoogleAuthorizationCodeFlow.Initializer()
{
ClientSecrets = new ClientSecrets()
{
ClientId = Constants.GoogleClientId,
ClientSecret = Constants.GoogleClientSecret
}
}
),
User.Identity.GetApplicationUser().UserName,
token
);
var youtubeService = new YouTubeService(new BaseClientService.Initializer()
{
ApplicationName = this.GetType().ToString(),
HttpClientInitializer = cred,
});
var searchListRequest = youtubeService.Search.List("snippet");
searchListRequest.Q = searchTerm;
searchListRequest.MaxResults = 50;
// Call the search.list method to retrieve results matching the specified query term.
var searchListResponse = await searchListRequest.ExecuteAsync();
Models.YouTubeViewModel vm = new Models.YouTubeViewModel(searchTerm);
foreach (var searchResult in searchListResponse.Items)
{
switch (searchResult.Id.Kind)
{
case "youtube#video":
vm.Videos.Add(new Models.Result(searchResult.Snippet.Title, searchResult.Id.VideoId));
break;
case "youtube#channel":
vm.Channels.Add(new Models.Result(searchResult.Snippet.Title, searchResult.Id.ChannelId));
break;
case "youtube#playlist":
vm.Playlists.Add(new Models.Result(searchResult.Snippet.Title, searchResult.Id.PlaylistId));
break;
}
}
return vm;
}
Model Classes
public class Result
{
public string Title { get; set; }
public string Id { get; set; }
public Result() { }
public Result(string title, string id)
{
this.Title = title;
this.Id = id;
}
}
public class YouTubeViewModel
{
public string SearchTerm { get; set; }
public List<Result> Videos { get; set; }
public List<Result> Playlists { get; set; }
public List<Result> Channels { get; set; }
public YouTubeViewModel()
{
Videos = new List<Result>();
Playlists = new List<Result>();
Channels = new List<Result>();
}
public YouTubeViewModel(string searchTerm)
:this()
{
SearchTerm = searchTerm;
}
}
Reference: http://blogs.msdn.com/b/webdev/archive/2013/10/16/get-more-information-from-social-providers-used-in-the-vs-2013-project-templates.aspx
I would like to make an apprequest from my application using the c# facebook sdk.
After some investigation I found some examples that are using the app access token which has the following format : access_token = YOUR_APP_ID|YOU_APP_SECRET
Now I have tried the following using the appAccessToken:
string appAccessToken = String.Format("{0}|{1}",Constants.FacebookAppId,Constants.FacebookAppSecret);
FacebookClient fb = new FacebookClient(appAccessToken);
fb.PostCompleted += (o, args) =>
{
if (args.Error != null)
{
Dispatcher.BeginInvoke(() => MessageBox.Show(args.Error.Message));
return;
}
};
dynamic parameters = new ExpandoObject();
parameters.message = "Test: Action is required";
parameters.data = "Custom Data Here";
fb.PostTaskAsync(String.Format("{0}/apprequests", Constants.FacebookAppId), parameters);
But it doesn't work... Is it possible to make an apprequest using the c# Facebook skd?
I hope anybody can help me.
Have a nice day!
With best regards, Matthias
To get access token of App.
Just use this link and you will get it
https://developers.facebook.com/tools/access_token/
Please check this out : http://facebooksdk.net/docs/phone/tutorial.
To get user access token
Add this to App.xaml.cs
internal static string AccessToken = String.Empty;
internal static string FacebookId = String.Empty;
public static bool IsAuthenticated = false;
public static FacebookSessionClient FacebookSessionClient = new FacebookSessionClient(Constants.FacebookAppId);
Create a method to get Access token
private async Task Authenticate()
{
try
{
_session = await App.FacebookSessionClient.LoginAsync("user_about_me,read_stream");
App.AccessToken = _session.AccessToken;
App.FacebookId = _session.FacebookId;
}
catch (InvalidOperationException e)
{
var messageBox = new OneButtonCustomMessageBox
{
TbMessageTitle = { Text = "Facebook Login Error" },
TbMessageContent = {Text = e.Message}
};
messageBox.Show();
}
}
After you have Access Token you will use a method like this to call GraphAPI from FB to get user information
private async void LoadUserInfo()
{
var fb = new FacebookClient(App.AccessToken);
fb.GetCompleted += (o, e) =>
{
if (e.Error != null)
{
Dispatcher.BeginInvoke(() => MessageBox.Show(e.Error.Message));
return;
}
var result = (IDictionary<string, object>)e.GetResultData();
Dispatcher.BeginInvoke(async () =>
{
var profilePictureUrl = string.Format("https://graph.facebook.com/{0}/picture?type={1}&access_token={2}", App.FacebookId, "normal", App.AccessToken);
this.ImgAvatar.Source = new BitmapImage(new Uri(profilePictureUrl));
this.TxtName.Text = String.Format("{0}", (string)result["name"]);
});
};
await fb.GetTaskAsync("me");
}
I'm trying to send a tweet using LinqToTwitter. My problem is that it almost never works. I've gotten it to work maybe three times out of thirty, and usually that's when I try to debug. I'm thinking it might have something to do with timing and authentication, but I don't know how to do it. The code runs without errors, but no tweet is generated.
public static async Task SendTweetAsync(string text)
{
// Get the authorization credentials
var auth = GetCredentials();
// Create the twitter context
var ctx = new TwitterContext(auth);
try
{
Status responseTweet = await ctx.TweetAsync(text);
}
catch (Exception e) {
throw e;
}
}
private static AspNetAuthorizer GetCredentials()
{
return new AspNetAuthorizer
{
CredentialStore = new InMemoryCredentialStore()
{
ConsumerSecret = "##########",
ConsumerKey = "##########",
OAuthToken = "##########",
OAuthTokenSecret = "##########",
UserID = ##########
}
};
}
I don't know what happened to the answer that was here before, by #JoeMayo, but the thing that worked for me was to change the AspNetAuthorizer to SingleUserAuthorizer.
private static SingleUserAuthorizer GetCredentials()
{
return new SingleUserAuthorizer
{
CredentialStore = new InMemoryCredentialStore()
{
ConsumerSecret = "##########",
ConsumerKey = "##########",
OAuthToken = "##########",
OAuthTokenSecret = "##########",
UserID = ##########
}
};
}
Also, I added await auth.AuthorizeAsync();
var auth = GetCredentials();
await auth.AuthorizeAsync();
As I said, the credit should really go to #JoeMayo, but his answer is gone.
I have the code below that I got from off of Prabir's Blog (codeplex documentation) and the fb.get() method does not exist...I was able to test all the way up to authentication where it takes me to the fb login page and now I am trying to do the fb.Get("/me"); I am new to this and am just following the guide...
private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
{
string appId = "xxx";
string[] extendedPermissions = new[] { "publish_stream", "offline_access" };
var oauth = new FacebookOAuthClient { AppId = appId};
var parameters = new Dictionary<string, object>
{
{ "response_type", "token" },
{ "display", "popup" }
};
if (extendedPermissions != null && extendedPermissions.Length > 0)
{
var scope = new StringBuilder();
scope.Append(string.Join(",", extendedPermissions));
parameters["scope"] = scope.ToString();
}
var loginUrl = oauth.GetLoginUrl(parameters);
webBrowser.Navigating += webBrowser_Navigated;
webBrowser.Navigate(loginUrl);
}
private void webBrowser_Navigated(object sender, NavigatingEventArgs e)
{
FacebookOAuthResult result=null;
if (FacebookOAuthResult.TryParse(e.Uri, out result))
{
if (result.IsSuccess)
{
var accesstoken = result.AccessToken;
var fb = new FacebookClient(accesstoken);
var results = (IDictionary<string, object>)fb.Get("/me");
var name = (string)results["name"];
MessageBox.Show("Hi " + name);
}
else
{
var errorDescription = result.ErrorDescription;
var errorReason = result.ErrorReason;
}
}
}
use fb.GetAsync instead. Window Phone 7 doesn't support synchronous methods.
i highly recommend you to download the source code and checkout the "Samples\CS-WP7.sln" example.
var fb = new FacebookClient(_accessToken);
fb.GetCompleted += (o, args) =>
{
if (args.Error == null)
{
var me = (IDictionary<string, object>)args.GetResultData();
Dispatcher.BeginInvoke(
() =>
{
FirstName.Text = "First Name: " + me["first_name"];
LastName.Text = "Last Name: " + me["last_name"];
});
}
else
{
Dispatcher.BeginInvoke(() => MessageBox.Show(args.Error.Message));
}
};
fb.GetAsync("me");