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2025-06-13 08ea05f85c9dd77834e56a2b912b2c43ac8888cd

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package security.filter;
 
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
 
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;
 
import org.springframework.web.context.ContextLoader;
import org.springframework.web.context.WebApplicationContext;
 
import security.SecurityContext;
import security.internal.SecurityAuthoritiesHolder;
import security.internal.SecurityResourceProcessor;
import security.util.AuthenticationUtil;
 
/**
 * 登录接口过滤器
 *
 */
public class UrlResourceFilterInvocation implements Filter {
    /**
     * url 白名单
     */
    private List<String> urls = new ArrayList<String>();
 
    private SecurityAuthoritiesHolder securityAuthoritiesHolder;
 
    private SecurityResourceProcessor securityResourceProcessor;
 
    private String redirectUrl = "../login.jsp";
 
    @Override
    public void init(FilterConfig arg0) throws ServletException {
        urls.add("/public/**");// 登录时
 
        WebApplicationContext webApplicationContext = ContextLoader.getCurrentWebApplicationContext();
        securityAuthoritiesHolder = (SecurityAuthoritiesHolder) webApplicationContext
                .getBean("securityAuthoritiesHolder");
 
        securityResourceProcessor = (SecurityResourceProcessor) webApplicationContext
                .getBean("securityResourceProcessor");
    }
 
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain)
            throws IOException, ServletException {
 
        HttpServletRequest httpServletRequest = (HttpServletRequest) request;
 
        HttpServletResponse httpServleResponse = (HttpServletResponse) response;
 
        String servletPath = httpServletRequest.getServletPath();
 
        if (!".action".equals(servletPath.substring(servletPath.length() - 7))) {// 白名单直接过滤，非action请求直接过滤
            filterChain.doFilter(request, response);
            return;
        }
 
        for (int i = 0; i < urls.size(); i++) {
            if (AuthenticationUtil.isUrlMatch(urls.get(i), servletPath)) {
                filterChain.doFilter(request, response);
                return;
            }
        }
 
        HttpSession session = httpServletRequest.getSession();
        Object contextFromSessionObject = session.getAttribute("SPRING_SECURITY_CONTEXT");
 
        if (contextFromSessionObject == null) {
            httpServleResponse.sendRedirect(httpServleResponse.encodeRedirectURL(redirectUrl));
            return;
        }
 
        if (!(contextFromSessionObject instanceof SecurityContext)) {
            httpServleResponse.sendRedirect(httpServleResponse.encodeRedirectURL(redirectUrl));
            return;
        }
 
        SecurityContext securityContext = (SecurityContext) contextFromSessionObject;
        if (securityResourceProcessor.isUrlAccessible(servletPath, securityContext.getRoles())) {
            filterChain.doFilter(request, response);
        }
 
    }
 
    @Override
    public void destroy() {
 
    }
}