网站10大常见安全漏洞及解决方案

/**
 * 校验参数，判断是否包含sql关键字表达式
 * 此方法会有误伤
 */ 
  
    private static boolean sqlValidate(String str) {  
        str = str.toLowerCase();//统一转为小写  
        String badSqlStr = "'|exec|execute|insert|select|delete|update|count|drop|chr|mid|master|truncate|char|declare|sitename|net user|xp_cmdshell|create|drop|"
                             +"table|from|grant|use|group_concat|column_name|1=1|=|"   
                             +"information_schema.columns|table_schema|union|where|*|"  
                          +"chr|mid|master|truncate|char|declare|or|;|,|like|//|/|%|#|-|--|+|";
        String badXssStr = "frame|iframe|script|javascript|=|<|>";
        
        //sql 关键词 有空格分隔
        String[] badSqlStrs = badSqlStr.split("\\|");  
        for (int i = 0; i < badSqlStrs.length; i++) {  
            if (str.indexOf(" "+badSqlStrs[i]) >= 0 || str.indexOf(badSqlStrs[i]+" ") >= 0) {  
                return true;  
            }  
        }
 
        } 
        
        return false;  
}

@Override
      public List<NewsColumn> getColumnListByType(String columnType) {
            String jql = " FROM "+NewsColumn.class.getName(，)+" WHERE type=:type ";
            List<NewsColumn> list = entityManager.createQuery(jql).setParameter("type", columnType).getResultList();
            return list;
      }

@Override
       public void doFilter(ServletRequest request, ServletResponse response,
                     FilterChain filterChain) throws IOException, ServletException {
              HttpServletRequest req = (HttpServletRequest) request;
           HttpServletResponse res = (HttpServletResponse)response;
           //禁止页面被frame
           res.addHeader("x-frame-options","SAMEORIGIN"); 
              Map parameterMap = req.getParameterMap();
        for (Iterator iterator = parameterMap.keySet().iterator(); iterator.hasNext();) {
            String key = (String) iterator.next();
            if ((key.contains("redirect:")) || (key.contains("redirectAction:")) || (key.contains("action:"))) {
             res.sendError(HttpServletResponse.SC_FORBIDDEN, "forbidden");
             System.out.println("----------非法操作-----------");
                return;
            }
        }
        filterChain.doFilter(request, response);
       }

<!-- 过滤不安全的请求方法 -->  
    <security-constraint>     
    <web-resource-collection>     
       <url-pattern>/*</url-pattern>     
       <http-method>PUT</http-method>     
    <http-method>DELETE</http-method>     
    <http-method>HEAD</http-method>     
    <http-method>OPTIONS</http-method>     
    <http-method>TRACE</http-method>
    </web-resource-collection>     
       <auth-constraint>     
       </auth-constraint>     
    </security-constraint>     
    <login-config>     
        <auth-method>BASIC</auth-method>     
    </login-config>

package com.interceptor;
 
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
 
/**
 * <p>
 *  类说明
 * </p>
 * @author shy
 * @date 2016-4-21 下午03:34:26
 * @vesion $Revision$ $Date$ 
 */
 
public class XssHttpServletRequestWrapper extends HttpServletRequestWrapper {
       HttpServletRequest orgRequest = null;  
         
    public XssHttpServletRequestWrapper(HttpServletRequest request) {  
        super(request);  
        orgRequest = request;  
    }  
  
    /** 
    * 覆盖getParameter方法，将参数名和参数值都做xss过滤。<br/> 
    * 如果需要获得原始的值，则通过super.getParameterValues(name)来获取<br/> 
    * 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过滤。<br/> 
    * 如果需要获得原始的值，则通过super.getHeaders(name)来获取<br/> 
    * 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 || "".equals(s)) {  
            return 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('＞');//全角大于号  
                break;  
            case '<':  
                sb.append('＜');//全角小于号  
                break;  
            case '\'':  
                sb.append('‘');//全角单引号  
                break;  
            case '\"':  
                sb.append('“');//全角双引号  
                break;  
            case '&':  
                sb.append('＆');//全角  
                break;  
            case '\\':  
                sb.append('＼');//全角斜线  
                break;  
            case '#':  
                sb.append('＃');//全角井号  
                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 XssHttpServletRequestWrapper) {  
            return ((XssHttpServletRequestWrapper) req).getOrgRequest();  
        }  
  
        return req;  
    }  
}