Question

I need to connect and authenticate users from java desk top application , i have tried facebook-java-api using facebookjsonclient and facebookRestclient but not able to get session key. is there any changes in facebook due to which we r not able to connect , or is there asny other best java api or example how to connect. my code is

private static void getUserID(String email, String password){
        String session = null;
        try {

            HttpClient http = new HttpClient();

            http.getHostConfiguration().setHost("www.facebook.com");
            String api_key = "key";
            String secret = "sec";
            FacebookJaxbRestClient client = new FacebookJaxbRestClient(api_key, secret);
                System.out.println("====>"+client.isDesktop());

            String token = client.auth_createToken();
            System.out.println(" :::::::"+token);
            System.out.println(" :::::::::: "+token);
            PostMethod post = new PostMethod("/login.php?");

            post.addParameter("api_key", api_key);


            post.addParameter("email", email);
            post.addParameter("pass", password);


            int postStatus = http.executeMethod(post);
                System.out.println("url : " + post.getURI());
            System.out.println("Response : " + postStatus);
            for (Header h : post.getResponseHeaders()) {
                System.out.println(h);
            }
            session = client.auth_getSession(token); // Here I am getting error
            System.out.println("Session string: " + session);
            long userid = client.users_getLoggedInUser();
            //System.out.println("User Id is : " + userid);*/
        } catch (FacebookException fe) {

            fe.printStackTrace();

        }catch(Exception e){
            e.printStackTrace();
        }
    }

Answer 1

First off, you need to get the access_token and then I would recommend using restfb library. In order to get the token I would recommend reading this: https://developers.facebook.com/docs/authentication/

A simple summary:

1. HTTP GET: https://www.facebook.com/dialog/oauth?
   client_id=YOUR_APP_ID&redirect_uri=YOUR_URL&scope=email,read_stream&
   response_type=token
2. Use the code you get from above and then, do: https://graph.facebook.com/oauth/access_token?
   client_id=YOUR_APP_ID&redirect_uri=YOUR_URL&
   client_secret=YOUR_APP_SECRET&code=THE_CODE_FROM_ABOVE
3. Exact the access_token and use FacebookClient from restfb to make the API requests.