Servlet.TwitterAuthServlet.java Source code

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Here is the source code for Servlet.TwitterAuthServlet.java

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/*
 * Copyright 2017 Andree Yosua.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package Servlet;

import Model.TwitterApp;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.auth.RequestToken;
import twitter4j.conf.ConfigurationBuilder;

/**
 *
 * @author Andree Yosua
 */
public class TwitterAuthServlet extends HttpServlet {

    /**
     * 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 {
        response.setContentType("text/html;charset=UTF-8");

        ConfigurationBuilder cb = new ConfigurationBuilder();

        cb.setOAuthConsumerKey(TwitterApp.CONSUMER_KEY);
        cb.setOAuthConsumerSecret(TwitterApp.CONSUMER_SECRET);

        Twitter twitter = new TwitterFactory(cb.build()).getInstance();
        request.getSession().setAttribute("twitter", twitter);
        try {
            StringBuffer callbackURL = request.getRequestURL();
            int index = callbackURL.lastIndexOf("/");
            callbackURL.replace(index, callbackURL.length(), "").append("/callback");

            System.out.println(callbackURL);

            RequestToken requestToken = twitter.getOAuthRequestToken(callbackURL.toString());

            System.out.println("Authentication " + requestToken.getAuthenticationURL());
            System.out.println("Authorization " + requestToken.getAuthorizationURL());

            request.getSession().setAttribute("requestToken", requestToken);
            response.sendRedirect(requestToken.getAuthenticationURL());
        } catch (TwitterException e) {
            throw new ServletException(e);
        }
    }

    // <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>

}