07防止常见XSS 过滤 SQL注入 JAVA过滤器filter

XSS:
跨站脚本攻击.(Cross SiteScripting),为不和层叠样式表(Cascading style Sheet,CSS),就这么写了.
恶意攻击者往往向Web页面里插入恶意HTML代码,当用户浏览该页的时候,嵌入其中Web里面的HTML代码会执行,从而达到而已攻击用户的特殊目的.
SQL注入:
就是通过把SQL命令插入到Web表单提交或输入域名或页面请求的查询字符串,最终达到欺骗服务器执行恶意的SQL命令。具体来说,它是利用现有应用程序,将(恶意)的SQL命令注入到后台数据库引擎执行的能力,它可以通过在Web表单中输入(恶意)SQL语句得到一个存在安全漏洞的网站上的数据库,而不是按照设计者意图去执行SQL语句。
解决方法:

  
  
    xssAndSqlFilter  
    com.cup.cms.web.framework.filter.XssAndSqlFilter  
  
  
  
    xssAndSqlFilter  
    *  
  

2.编写过滤器

/** 
 *  
 */  
package com.cup.cms.web.framework.filter;  
  
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;  
  
/** 
 * @Author hithedy 
 * @Date 2016年2月2日 
 * @Time 下午2:01:53 
 */  
public class XssAndSqlFilter implements Filter {  
  
    @Override  
    public void destroy() {  
        // TODO Auto-generated method stub  
  
    }  
  
    @Override  
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {  
        XssAndSqlHttpServletRequestWrapper xssRequest = new XssAndSqlHttpServletRequestWrapper((HttpServletRequest) request);  
        chain.doFilter(xssRequest, response);  
    }  
  
    @Override  
    public void init(FilterConfig arg0) throws ServletException {  
        // TODO Auto-generated method stub  
  
    }  
  
} 

3.类包装器

/** 
 *  
 */  
package com.cup.cms.web.framework.filter;  
  
import java.util.regex.Pattern;  
  
import javax.servlet.http.HttpServletRequest;  
import javax.servlet.http.HttpServletRequestWrapper;  
  
/** 
 * @Author hithedy 
 * @Date 2016年2月2日 
 * @Time 下午2:03:19 
 */  
public class XssAndSqlHttpServletRequestWrapper extends HttpServletRequestWrapper {  
      
    HttpServletRequest orgRequest = null;  
      
    public XssAndSqlHttpServletRequestWrapper(HttpServletRequest request) {  
        super(request);  
        orgRequest = request;  
    }  
  
    /** 
     * 覆盖getParameter方法,将参数名和参数值都做xss & sql过滤。
* 如果需要获得原始的值,则通过super.getParameterValues(name)来获取
* getParameterNames,getParameterValues和getParameterMap也可能需要覆盖 */ @Override public String getParameter(String name) { String value = super.getParameter(xssEncode(name)); if (value != null) { value = xssEncode(value); } return value; } /** * 覆盖getHeader方法,将参数名和参数值都做xss & sql过滤。
* 如果需要获得原始的值,则通过super.getHeaders(name)来获取
* getHeaderNames 也可能需要覆盖 */ @Override public String getHeader(String name) { String value = super.getHeader(xssEncode(name)); if (value != null) { value = xssEncode(value); } return value; } /** * 将容易引起xss & sql漏洞的半角字符直接替换成全角字符 * * @param s * @return */ private static String xssEncode(String s) { if (s == null || s.isEmpty()) { return s; }else{ s = stripXSSAndSql(s); } StringBuilder sb = new StringBuilder(s.length() + 16); for (int i = 0; i < s.length(); i++) { char c = s.charAt(i); switch (c) { case '>': sb.append(">");// 转义大于号 break; case '<': sb.append("<");// 转义小于号 break; case '\'': sb.append("'");// 转义单引号 break; case '\"': sb.append(""");// 转义双引号 break; case '&': sb.append("&");// 转义& break; case '#': sb.append("#");// 转义# break; default: sb.append(c); break; } } return sb.toString(); } /** * 获取最原始的request * * @return */ public HttpServletRequest getOrgRequest() { return orgRequest; } /** * 获取最原始的request的静态方法 * * @return */ public static HttpServletRequest getOrgRequest(HttpServletRequest req) { if (req instanceof XssAndSqlHttpServletRequestWrapper) { return ((XssAndSqlHttpServletRequestWrapper) req).getOrgRequest(); } return req; } /** * * 防止xss跨脚本攻击(替换,根据实际情况调整) */ public static String stripXSSAndSql(String value) { if (value != null) { // NOTE: It's highly recommended to use the ESAPI library and // uncomment the following line to // avoid encoded attacks. // value = ESAPI.encoder().canonicalize(value); // Avoid null characters /** value = value.replaceAll("", "");***/ // Avoid anything between script tags Pattern scriptPattern = Pattern.compile("<[\r\n| | ]*script[\r\n| | ]*>(.*?)", Pattern.CASE_INSENSITIVE); value = scriptPattern.matcher(value).replaceAll(""); // Avoid anything in a src="http://www.yihaomen.com/article/java/..." type of e-xpression scriptPattern = Pattern.compile("src[\r\n| | ]*=[\r\n| | ]*[\\\"|\\\'](.*?)[\\\"|\\\']", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL); value = scriptPattern.matcher(value).replaceAll(""); // Remove any lonesome tag scriptPattern = Pattern.compile("", Pattern.CASE_INSENSITIVE); value = scriptPattern.matcher(value).replaceAll(""); // Remove any lonesome

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