bbsloginfilter.java

tbuy1.1.5是在netbeans环境下用JSF技术编写的一个论坛tbuy1.1.5是在netbeans环境下用JSF技术编写的一个论坛

/*
 * 作者: 胡李青
 * qq: 31703299
 * Copyright (c) 2007 huliqing
 * 主页 http://www.tbuy.biz/
 * 你可以免费使用该软件，未经许可请勿作用于任何商业目的,如有技术问题请与本人联系！
 *
 * 检验用户是否已经登录BBS系统，如果已经登录则不作任何处理，否则设置:
 * BBSSession.isLogin = true, 并更新用户的BBS系统的userinfo表的信息,如：
 * 最后登录BBS的时间，IP。登录次数等
 */

package biz.tbuy.bbs;

import biz.tbuy.common.Visitor;
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.HttpSession;

/**
 * @author huliqing
 * <p><b>qq：</b>31703299
 * <p><b>E-mail：</b>
 * <a href="mailto:[e-mail]">[e-mail]</a>
 * <p><b>Homepage：</b>
 * <a href="http://www.tbuy.biz/">http://www.tbuy.biz/</a>
 */
public class BBSLoginFilter implements Filter{
    private FilterConfig filterConfig = null;
    
    public BBSLoginFilter() {
    }

    public void init(FilterConfig filterConfig) { 
        this.filterConfig = filterConfig;
    }
    
    /**
     * @param filterConfig The filter configuration object
     */
    public void setFilterConfig(FilterConfig filterConfig) {
        this.filterConfig = filterConfig;
    }
    
    /**
     * Return the filter configuration object for this filter.
     * @return fileterConfig
     */
    public FilterConfig getFilterConfig() {
        return this.filterConfig;
    }


    public void doFilter(ServletRequest request, 
            ServletResponse response,
            FilterChain chain) throws IOException, ServletException {
        HttpServletRequest requestHttp = (HttpServletRequest) request;
        String requestURI = requestHttp.getRequestURI();
        
        if (requestURI.indexOf("/bbs/") != -1) {
            // 判断用户是否已经登录BBS系统,如果是刚登录，则需要更新用户的BBS信息
            Visitor visitor = getVisitor(requestHttp);
            if (visitor != null && visitor.isLogin()) {
                BBSSession bbs = (BBSSession)visitor.getSessionOper().get("BBSSession");
                if (bbs == null) {
                     // 更新用户的BBS信息,时间、IP
                    BBSSession bbsNew = new BBSSession();
                    bbsNew.init(visitor.getUser().getId());
                    bbsNew.setLogin(true);
                    visitor.getSessionOper().put("BBSSession", bbsNew);
                } else if (!bbs.isLogin()){
                    // 如果用户已经登录主站，但未登录BBS系统,则更新用户的BBS信息
                    // 并设置为已经登录BBS
                    bbs.init(visitor.getUser().getId());
                    bbs.setLogin(true);
                }
            }
        }
        // 进行下一个过滤
        try {
            chain.doFilter(request, response);
        } catch(Throwable t) {
            System.out.println("BBSLoginFilter:Trowable:" + t.getMessage());
        }
    }
    
    // 获取sessionScope.Visitor
    private Visitor getVisitor(HttpServletRequest request) {
        Visitor visitor = null;
        HttpSession session = request.getSession(false);
        try {
            visitor = (Visitor)session.getAttribute("visitor");
        } catch (Exception e) {
            //System.out.println("visitor is null");
        }
        return visitor;
    }

    public void destroy() {}
}