[英]Filter runs in infinite redirect loop
我正在制作一個學生管理系統,其中有三個用戶。
管理員,學生和超級管理員。
我正在通過過濾器處理授權。 當用戶登錄時,它將根據其角色將其重定向,例如,如果用戶是學生,則將用戶重定向到學生頁面。
但是問題在於FilterBean中的SuperAdmin
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;
/**
*
* @author Sikandar
*/
public class FilterBean implements Filter{
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
HttpServletResponse resp = (HttpServletResponse) response;
//HttpSession session = req.getSession();
HttpSession session = req.getSession();
String userName = (String) session.getAttribute("userName");
String role = (String) session.getAttribute("role");
System.out.println("role in Filter out side condition " +role);
String url = req.getRequestURI();
if (session == null || userName == null) {
System.out.println("The role is if session == null "+role);
if (url.indexOf("admin.xhtml") >= 0 || url.indexOf("student.xhtml") >= 0 || url.indexOf("superadmin.xhtml") >= 0) {
resp.sendRedirect(req.getServletContext().getContextPath()+"/login.xhtml");
} else {
chain.doFilter(request, response);
}
} else {
if(role.equals("admin") && (url.indexOf("login.xhtml") >= 0 || url.indexOf("superadmin.xhtml") >= 0 || url.indexOf("student.xhtml") >= 0)) {
resp.sendRedirect(req.getServletContext().getContextPath()+"/admin.xhtml");
} else if (role.equals("super") && (url.indexOf("login.xhtml") >= 0 || url.indexOf("student.xhtml") >=0)) {
System.out.println("role == super "+url.indexOf("admin.xhtml"));
resp.sendRedirect(req.getServletContext().getContextPath()+"/superadmin.xhtml");
} else if (role.equals("student") && (url.indexOf("login.xhtml") >= 0 || url.indexOf("admin.xhtml") >=0 || url.indexOf("superadmin.xhtml") >= 0)) {
resp.sendRedirect(req.getServletContext().getContextPath()+"/student.xhtml");
}
else {
chain.doFilter(request, response);
}
}
}
@Override
public void destroy() {
}
}
else if (role.equals("super") && (url.indexOf("login.xhtml") >= 0 || url.indexOf("student.xhtml") >=0)) {
System.out.println("role == super "+url.indexOf("admin.xhtml"));
resp.sendRedirect(req.getServletContext().getContextPath()+"/superadmin.xhtml");
如果我把url.indexOf("superadmin.xhtml");
在這種情況下,它表示頁面中還有更多重定向。
url.indexOf("superadmin.xhtml");
和url.indexOf("admin.xhtml");
兩者都包含admin.xhtml作為后綴,這可能會導致嘗試將superadmin.xhtml重命名為adminsuper.xhtml的問題
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