External login is not working for facebook in MVC 4 webapplication

Question

I have noticed that after expiration of Facebook GRAPH API on March 27, 2017 my Facebook application is not providing the access to my web application. Mainly OAuthWebSecurity is failed to fetch the login state from the facebook graph API, I have gone through the bug report in the developers group. But they didn't provide a solution. I got a solution which is provided for NopCommerce in this link. However I didn't get any perfect solution for MVC 4.

I have gone through this link where they system is approached in MVC 5 however I need the solution in MVC4 And mention that OWIN is not supported for MVC4 in VS 2012 So how do I solve this problem. I have been undergoing this problem since last 1 week.

Mainly the exception is happening in this piece of code

AuthenticationResult result = OAuthWebSecurity.VerifyAuthentication(Url.Action("ExternalLoginCallback", new { ReturnUrl = returnUrl }));

It's returning IsSuccessful as false and rest of the parameters are null as well.

I have studied that Facebook have changed the the return type of the API string to JSON So how to develop my code to get those JSON exactly. thank you.

Update: This Question is still unanswered. Anyone here to help me.

Answer 1

Have you checked this solution?

"We ran into this same issue on Monday, 3/27/2017, when Facebook discontinued support for their Graph API v2.2. We are also using DotNetOpenAuth, which was originally installed via Nuget. The source code is available at the link below"

FacebookApplication.VerifyAuthentication(_httpContext, GenerateLocalCallbackUri()) return null on Facebook

Edit (Apr 18, 2017): Hello, I've came across the following link this morning and it solved the issue for me. Give it try and let me know :)

https://github.com/DotNetOpenAuth/DotNetOpenAuth/issues/397

The code is provided by the user 'adoconnection'. it's the 4th post in the link.

I was pulling my hair over this. lol

Best regards!