package web.util;

import org.apache.log4j.Logger;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class LandingFilter implements Filter {
	/**
	 * Logger for this class
	 */
	private static final Logger logger = Logger.getLogger(LandingFilter.class);


	public void destroy() {
		

	}


	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest hRequest = (HttpServletRequest) request;
		HttpServletResponse hResponse = (HttpServletResponse)response;
		HttpSession hSession = hRequest.getSession();
		
		String userLoad = hRequest.getParameter("userload");
		
		if(userLoad==null||!userLoad.equals("true")){
			String pass = (String) hSession.getAttribute("pass");
			if(pass!=null && pass.trim().equals("true")){
				chain.doFilter(request, response);
			}else{
				hResponse.sendRedirect(hRequest.getContextPath()+"/"+"index.jsp");
				logger
						.error(
								"doFilter(ServletRequest, ServletResponse, FilterChain) - 被過濾掉了",
								null);
			}
		}else{
			chain.doFilter(request, response);
		}	
	}


	public void init(FilterConfig arg0) throws ServletException {
		

	}

}