Shop/src/filters/AdminFilter.java

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package filters;

import java.io.IOException;
import javax.servlet.*;
import javax.servlet.http.*;

public class AdminFilter extends HttpServlet
    implements Filter
{

    private static final long serialVersionUID = 1L;
    private FilterConfig filterConfig;

    public AdminFilter()
    {
    }

    public void init(FilterConfig filterConfig)
        throws ServletException
    {
        this.filterConfig = filterConfig;
    }

    public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain)
        throws IOException
    {
        HttpServletResponse response1;
        boolean passFlag;
        HttpServletRequest request1 = (HttpServletRequest)request;
        response1 = (HttpServletResponse)response;
        HttpSession session = request1.getSession(true);
        String username = (String)session.getAttribute("admin");
        String uri = request1.getRequestURI();
        passFlag = false;
        if(username != null && !"".equals(username))
        {
            passFlag = true;
        }
        if("/manage/login.jsp".equals(uri))
        {
            passFlag = true;
        }
        if("/manage/login.html".equals(uri))
        {
            passFlag = true;
        }
        if(uri.indexOf("/manage/images/") != -1)
        {
            passFlag = true;
        }
        if(uri.indexOf("/manage/style/") != -1)
        {
            passFlag = true;
        }
        if(!passFlag)
        {
            response1.sendRedirect("/manage/login.jsp");
            return;
        }
        try