org.geocachingtools.geoui.OAuthServlet.java Source code

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Here is the source code for org.geocachingtools.geoui.OAuthServlet.java

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/**
 * The MIT License (MIT)
 *
 * Copyright (c) [2016] [Geocaching-Tools: Stefan Kurzbauer, Jakob Geringer,
 * Thomas Rapberger, Lukas Wallenboeck, Simon Lehner-Dittenberger]
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.geocachingtools.geoui;

import com.google.api.client.googleapis.auth.oauth2.GoogleIdToken;
import com.google.api.client.googleapis.auth.oauth2.GoogleIdToken.Payload;
import com.google.api.client.googleapis.auth.oauth2.GoogleIdTokenVerifier;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import java.io.IOException;
import java.io.PrintWriter;
import java.security.GeneralSecurityException;
import java.util.Collections;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author lukas
 */
@WebServlet(name = "OAuthServlet", urlPatterns = { "/OAuthServlet" })
public class OAuthServlet extends HttpServlet {

    private final String CLIENT_ID = "282017452229-165f3htsp7os10s9bk4689lunqm38euj.apps.googleusercontent.com";

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            // Set up the HTTP transport and JSON factory
            HttpTransport transport = GoogleNetHttpTransport.newTrustedTransport();
            JsonFactory jsonFactory = JacksonFactory.getDefaultInstance();

            GoogleIdTokenVerifier verifier = new GoogleIdTokenVerifier.Builder(transport, jsonFactory)
                    .setAudience(Collections.singletonList(CLIENT_ID)).build();

            // (Receive idTokenString by HTTPS POST)
            GoogleIdToken idToken = verifier.verify(request.getParameter("idtoken"));
            if (idToken != null) {
                Payload payload = idToken.getPayload();

                // Print user identifier
                String userId = payload.getSubject();
                System.out.println("User ID: " + userId);

                // Get profile information from payload
                String email = payload.getEmail();
                boolean emailVerified = payload.getEmailVerified();
                String name = (String) payload.get("name");
                String pictureUrl = (String) payload.get("picture");
                String locale = (String) payload.get("locale");
                String familyName = (String) payload.get("family_name");
                String givenName = (String) payload.get("given_name");

                System.out.println(email);
                // Use or store profile information
                // ...
            } else {
                System.out.println("Invalid ID token.");
            }
        } catch (GeneralSecurityException ex) {
            Logger.getLogger(OAuthServlet.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}