aish.vaishno.facebookoauth.access.FaceBookHelper.java Source code

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Here is the source code for aish.vaishno.facebookoauth.access.FaceBookHelper.java

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package aish.vaishno.facebookoauth.access;

import com.restfb.json.JsonObject;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.faces.context.FacesContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import org.apache.commons.io.IOUtils;

/**
 *
 * @author aishwarya
 */
@Path(value = "FBHelperBean")
@ManagedBean(name = "FBHelperBean")
@SessionScoped
public class FaceBookHelper {

    private static final String CLIENT_TOKEN = "xxxx";
    private static final String APP_SECRET = "yy";
    private static final String APP_ID = "123123";
    private static final String REDIRECT_URI = "http://localhost:49066/FacebookOAuth/webresources/FBHelperBean/code";

    @Produces(MediaType.APPLICATION_JSON)
    @GET
    @Path(value = "loginRedirectUrl")
    public String getLoginRedirectUrl() {
        HttpSession session = (HttpSession) FacesContext.getCurrentInstance().getExternalContext()
                .getSession(false);
        System.out.println("******* SESSION ID: " + session.getId());
        String returnValue = "https://graph.facebook.com/oauth/authorize?client_id=" + APP_ID + "&redirect_uri="
                + REDIRECT_URI + "&scope=email";
        return returnValue;
    }

    /*    public String getAuthCode(@Context HttpServletRequest req) {
     String authCode=req.getParameter("code");
     return authCode;
     }
        
     */
    private String getAccessToken(String authCode) {
        String result = null;
        String accessToken = null;
        String expires = null;
        try {
            System.out.println("AUTH CODE: " + authCode);
            String authUrl = "https://graph.facebook.com/oauth/access_token?client_id=" + APP_ID + "&redirect_uri="
                    + REDIRECT_URI + "&client_secret=" + APP_SECRET + "&code=" + authCode;
            URL url = new URL(authUrl);
            result = getReadUrl(url);
            String[] splitRec = result.split("&");
            System.out.println("String[]" + splitRec[0]);
            for (String string : splitRec) {
                String[] indRec = string.split("=");
                System.out.println("*******ACCESS TOKEN: " + indRec[1]);
                if ("access_token".equalsIgnoreCase(indRec[0])) {
                    accessToken = indRec[1];
                }
                if ("expires".equalsIgnoreCase(indRec[0])) {
                    expires = indRec[1];
                } else {
                    System.out.println("No Rec Found");
                }
            }
            System.out.println("baos.toByteArray(): " + result);

        } catch (MalformedURLException ex) {
            Logger.getLogger(FaceBookHelper.class.getName()).log(Level.SEVERE, null, ex);
        }
        return accessToken;
    }

    @Produces(MediaType.APPLICATION_JSON)
    @GET
    @Path(value = "code")
    public String authorizeFacebookLogin(@Context HttpServletRequest req) {
        JsonObject jsonObject = null;
        try {
            String authCode = req.getParameter("code");
            String accessToken = getAccessToken(authCode);
            URL url = new URL("https://graph.facebook.com/me?access_token=" + accessToken);
            jsonObject = new JsonObject(IOUtils.toString(url));
            jsonObject.getString("id");
            jsonObject.getString("first_name");
            jsonObject.getString("last_name");
        } catch (IOException ex) {
            Logger.getLogger(FaceBookHelper.class.getName()).log(Level.SEVERE, null, ex);
        }
        return jsonObject.getString("first_name");
    }

    private String getReadUrl(URL url) {
        InputStream is = null;
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try {
            is = url.openStream();
            int r;
            while ((r = is.read()) != -1) {
                baos.write(r);

            }
        } catch (IOException ex) {
            Logger.getLogger(FaceBookHelper.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            try {
                if (is != null) {
                    is.close();
                }
            } catch (IOException ex) {
                Logger.getLogger(FaceBookHelper.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        return new String(baos.toByteArray());
    }

}