java 漏洞处理--http host头攻击漏洞处理方案

import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
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.apache.commons.lang.StringUtils;

/**
 *  进入拦截器（所有请求都会进入）
 */
public class SessionFilter  implements Filter
{
  public void destroy()
  {
  }
  public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
    throws IOException, ServletException
  {
    HttpServletRequest request = (HttpServletRequest)servletRequest;
    HttpServletResponse response = (HttpServletResponse)servletResponse;
    String requestStr = getRequestString(request);
    System.out.println("requestStr： ======================== " + requestStr);
   // 请求地址
    System.out.println("完整的地址是===="+request.getRequestURL().toString());
   //请求方法
  System.out.println("提交的方式是========"+request.getMethod()); 
 if("bingo".equals(guolv2(requestStr))||"bingo".equals(guolv2(request.getRequestURL().toString()))){
  System.out.println("======访问地址发现非法字符，已拦截======");
  response.sendRedirect(request.getContextPath() + "/login.jsp");
        return;
 }
 //主机ip和端口  或 域名和端口 
 String myhosts = request.getHeader("host");
   if(!StringUtils.equals(myhosts, "xx.xx.xxx.xxx:xxxx") && !StringUtils.equals(myhosts, "xx.xx.xxx.xxx:xxxx") 
     && !StringUtils.equals(myhosts, "xx.xx.xxx.xxx:xxxx")&&!StringUtils.equals(myhosts, "xx.xx.xxx.xxx") 
     && !StringUtils.equals(myhosts, "xx.xx.xxx.xxx") && !StringUtils.equals(myhosts, "xx.xx.xxx.xxx") ){
    System.out.println("======访问host非法，已拦截======");
    response.sendRedirect(request.getContextPath() + "/login.jsp");
       return;
 }
 
    String currentURL = request.getRequestURI();
     //过滤请求特殊字符，扫描跨站式漏洞
        Map parameters = request.getParameterMap();                //获取所有请求参数
        if (parameters != null && parameters.size() > 0) {
            for (Iterator iter = parameters.keySet().iterator(); iter.hasNext();) {
                String key = (String) iter.next();
                String[] values = (String[]) parameters.get(key);
                for (int i = 0; i < values.length; i++) {
                 values[i]=guolv(values[i]);                      //对参数关键字进行替换
                 System.out.println(values[i]);
                }
            }
        }

   //初始化
  public void init(FilterConfig filterConfig)
    throws ServletException
  {
  }

  //对所有关键字替换为空（特别是文本域）
  public static String guolv(String a){
  a = a.replaceAll("%22","");
  a = a.replaceAll("%27","");
  a = a.replaceAll("%3E","");
  a = a.replaceAll("%3e","");
  a = a.replaceAll("%3C","");
  a = a.replaceAll("%3c","");
  a = a.replaceAll("<","");
  a = a.replaceAll(">","");
  a = a.replaceAll("\"","");
  a = a.replaceAll("'","");
  a = a.replaceAll("\\+","");
  a = a.replaceAll("\\(","");
  a = a.replaceAll("\\)","");
  a = a.replaceAll(" and ","");
  a = a.replaceAll(" or ","");
  a = a.replaceAll(" 1=1 ","");
  return a;
    }
  
  private String getRequestString(HttpServletRequest req) {
  String requestPath = req.getServletPath().toString();
  String queryString = req.getQueryString();
  if (queryString != null)
   return requestPath + "?" + queryString;
  else
   return requestPath;
 }
  
  //对所有关键字替换为空（防止sql注入）
  public String guolv2(String a){
    if(StringUtils.isNotEmpty(a)){
     if(a.contains("%22") || a.contains("%3E") || a.contains("%3e") || a.contains("%3C") || a.contains("%3c") ||
       a.contains("<") || a.contains(">") || a.contains("\"") || a.contains("'") || a.contains("+") || /*a.contains("%27") ||*/
       a.contains(" and ") || a.contains(" or ") || a.contains("1=1") || 
       a.contains("(") || a.contains(")") ){
      return "bingo";
     }
    }
    return a;
  }
  
    
}