Вы можете использовать
https://www.nuget.org/packages/Microsoft.Owin.Security.Facebook/ для получения логина и разрешения пользователей и
https://www.nuget.org/packages/Facebook.Client/
размещать в фидах.
Ниже приведен пример для ASP.NET MVC 5:
public void ConfigureAuth(IAppBuilder app)
{
app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);
// Facebook
var facebookOptions = new FacebookAuthenticationOptions
{
AppId = "{get_it_from_dev_console}",
AppSecret = "{get_it_from_dev_console}",
BackchannelHttpHandler = new FacebookBackChannelHandler(),
UserInformationEndpoint = "https://graph.facebook.com/v2.4/me?fields=id,name,email,first_name,last_name,location",
Provider = new FacebookAuthenticationProvider
{
OnAuthenticated = context =>
{
context.Identity.AddClaim(new Claim("FacebookAccessToken", context.AccessToken)); // user acces token needed for posting on the wall
return Task.FromResult(true);
}
}
};
facebookOptions.Scope.Add("email");
facebookOptions.Scope.Add("publish_actions"); // permission needed for posting on the wall
facebookOptions.Scope.Add("publish_pages"); // permission needed for posting on the page
app.UseFacebookAuthentication(facebookOptions);
AntiForgeryConfig.UniqueClaimTypeIdentifier = ClaimTypes.NameIdentifier;
}
}
На обратный вызов вы получаете токен доступа пользователя:
public ActionResult callback()
{
// Here we skip all the error handling and null checking
var auth = HttpContext.GetOwinContext().Authentication;
var loginInfo = auth.GetExternalLoginInfo();
var identityInfo = auth.GetExternalIdentity(DefaultAuthenticationTypes.ExternalCookie);
var email = loginInfo.Email // klaatuveratanecto@gmail.com
var name = loginInfo.ExternalIdentity.Name // Klaatu Verata Necto
var provider = loginInfo.Login.LoginProvider // Facebook | Google
var fb_access_token = loginInfo.identityInfo.FindFirstValue("FacebookAccessToken");
// Save this token to database, for the purpose of this example we will save it to Session.
Session['fb_access_token'] = fb_access_token;
// ...
}
Который затем вы можете использовать для публикации в фиде пользователя или на странице
public class postcontroller : basecontroller
{
public ActionResult wall()
{
var client = new FacebookClient( Session['fb_access_token'] as string);
var args = new Dictionary<string, object>();
args["message"] = "Klaatu Verata N......(caugh, caugh)";
try
{
client.Post("/me/feed", args); // post to users wall (feed)
client.Post("/{page-id}/feed", args); // post to page feed
}
catch (Exception ex)
{
// Log if anything goes wrong
}
}
}
Я разместил полный пример здесь:
https://klaatuveratanecto.com/facebook-wall-feed-posting-asp-net-mvc/