import javax.servlet.Filter;
import javax.servlet.ServletException;
import javax.servlet.FilterConfig;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.FilterChain;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.io.IOException;
public class LoginFilter implements Filter{
public void init(FilterConfig filterConfig)
throws ServletException{
}
public void destroy(){
}
public void doFilter(ServletRequest request1,
ServletResponse response,
FilterChain chain) throws IOException, ServletException{
HttpServletRequest request = ( HttpServletRequest )request1;
HttpSession session = request.getSession();
String str = (String)session.getAttribute("login");
if("ok".equals(str)){
chain.doFilter(request , response);
}else{
String query = request.getQueryString();
String uri1 = request.getRequestURI() ;
String path;
if(query != null){
path = uri1+"?"+query;
}else{
path = uri1;
}
System.out.println(path);
request.setAttribute("path",path);
request.getRequestDispatcher("/login.jsp").forward(request1,response);
}
}
}
