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package a.b.c.server;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.http.RequestToken;

public class LoginServlet extends HttpServlet
{
	public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException
	{
		try
		{
			Twitter twitter = new TwitterFactory().getInstance();
			twitter.setOAuthConsumer("", "");
			RequestToken requestToken = twitter.getOAuthRequestToken();

			String token = requestToken.getToken();
			String tokenSecret = requestToken.getTokenSecret();

			HttpSession session = request.getSession();
			session.setAttribute("token", token);
			session.setAttribute("tokenSecret", tokenSecret);

			PrintWriter out = response.getWriter();
			try
			{
				response.setContentType("text/html;charset=UTF-8");
				//	
				out.print("<a href='" + requestToken.getAuthorizationURL() + "'/>Sing in with Twitter</a>");
			}
			finally
			{
				out.close();
			}
		}
		catch (TwitterException te)
		{
			if (401 == te.getStatusCode())
			{
				System.out.println("Unable to get the access token.");
			}
			else
			{
				te.printStackTrace();
			}
		}
	}
}