com.poscoict.license.security.AjaxSessionTimeoutFilter.java Source code

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Here is the source code for com.poscoict.license.security.AjaxSessionTimeoutFilter.java

Source

package com.poscoict.license.security;

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 org.springframework.security.access.AccessDeniedException;
import org.springframework.security.core.AuthenticationException;

public class AjaxSessionTimeoutFilter implements Filter {
    private String ajaxHeader = "AJAX";

    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        HttpServletRequest req = (HttpServletRequest) request;
        HttpServletResponse res = (HttpServletResponse) response;
        if (isAjaxRequest(req)) {
            try {
                String user = (String) req.getSession().getAttribute("USER_NO");
                if (user == null) {
                    throw new AccessDeniedException(" ");
                } else {
                    chain.doFilter(req, res);
                }
            } catch (AccessDeniedException e) {
                System.out.println(e.getMessage());
                res.sendError(HttpServletResponse.SC_FORBIDDEN);
            } catch (AuthenticationException e) {
                res.sendError(HttpServletResponse.SC_UNAUTHORIZED);
            }
        } else {
            chain.doFilter(req, res);
        }
    }

    private boolean isAjaxRequest(HttpServletRequest req) {
        return req.getHeader(ajaxHeader) != null && req.getHeader(ajaxHeader).equals(Boolean.TRUE.toString());
    }

    public void setAjaxHeader(String ajaxHeader) {
        this.ajaxHeader = ajaxHeader;
    }

    @Override
    public void destroy() {
    }

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }
}