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package com.filter;

import java.io.IOException;

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.RequestDispatcher;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpSession;

import com.valueBean.UserSingle;

public class NeedLogonFilter implements Filter {

private FilterConfig fc;

public void destroy() {

this.fc=null;

}

public void doFilter(ServletRequest sRequest, ServletResponse sResponse,FilterChain chain) throws IOException, ServletException {

HttpServletRequest request=(HttpServletRequest)sRequest;

HttpSession session=request.getSession();

Object logoner=session.getAttribute("logoner");

if(logoner!=null&&(logoner instanceof UserSingle)) //用户已经登录

chain.doFilter(sRequest,sResponse);

else{ //没有登录

String message="";

if("review".equals(request.getParameter("action"))){ //如果进行的是"发表评论"、"发表留言"的操作

String noname=request.getParameter("noname");

if(!"true".equals(noname)){ //若不是匿名发表

message="<li>您没有登录！</li><a href='javascript:window.history.go(-1)'>【返回】</a>";

request.setAttribute("message",message);

String forward=fc.getServletContext().getInitParameter("messagePage");

RequestDispatcher rd=request.getRequestDispatcher(forward);

rd.forward(sRequest,sResponse);

}

else //若是匿名发表

chain.doFilter(sRequest,sResponse);

}

else{ //如果进行的是其他操作，如＂加为好友＂

message="<li>您没有登录！</li><a href='javascript:window.history.go(-1)'>【返回】</a>";

request.setAttribute("message",message);

String forward=fc.getServletContext().getInitParameter("messagePage");

RequestDispatcher rd=request.getRequestDispatcher(forward);

rd.forward(sRequest,sResponse);

}

}

}

public void init(FilterConfig fc) throws ServletException {

this.fc=fc;

}

}