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import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class RestrictUserIP extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
PrintWriter out;
/**
* Status code (401) indicating that the request requires HTTP
* authentication.
*/
if (req.getRemoteAddr().equals("142.3.28.87")) {
resp.sendError(HttpServletResponse.SC_UNAUTHORIZED);
}
resp.setContentType("text/html");
out = resp.getWriter();
out.println("<HTML>");
out.println("<BODY>");
out.println("<H1>");
out.println("Hello!");
out.println("<BR>");
out.println("Your IP Address: " + req.getRemoteAddr());
out.println("</H1>");
out.println("</body>");
out.println("</html>");
out.close();
}
}
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