package request;

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

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import model.User;

import agent.UserAgent;

public class LogServlet extends HttpServlet {
	
	public static String changeCode(String s) {
		byte[] a;
		String result=null;
		try {
			a = s.getBytes("ISO-8859-1");
			result = new String(a,"GB2312");
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
		return result;
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		UserAgent ua = new UserAgent();
		String userid = changeCode(request.getParameter("userid"));
		String userpw = changeCode(request.getParameter("userpw"));
		User user = ua.getUser(userid);
		if (ua.isExist(userid) && user.getUserpw().equals(userpw)) {

			
			HttpSession session= request.getSession();
			session.setAttribute("user", user);
			response.sendRedirect("userpage.jsp");

		} else {
			response.sendRedirect("unlog.jsp");
		}
	}
}