网站跨站点脚本，Sql注入等攻击的处理

从360安全论坛里找到的一段代码，经过整理封装，直接在站点Global.asax文件或写一个HttpModule来拦截恶意请求即可；

http://bbs.webscan.360.cn/forum.php?mod=viewthread&tid=711&page=1&extra=#pid1927 

using System.Text.RegularExpressions;  
using System.Web;  
  
/// <summary>  
/// Web请求安全检查：防止跨站点脚本,Sql注入等攻击,来自:http://bbs.webscan.360.cn/forum.php?mod=viewthread&tid=711&page=1&extra=#pid1927  
/// 检查数据包括:  
/// 1.Cookie  
/// 2.当前页面地址  
/// 3.ReferrerUrl  
/// 4.Post数据  
/// 5.Get数据  
/// </summary>  
public class Safe360  
{  
    #region 执行安全检查  
  
    /// <summary>  
    /// 执行安全检查  
    /// </summary>  
    public static void Procress()  
    {  
        const string errmsg =  
            "<div style='position:fixed;top:0px;100%;height:100%;background-color:white;color:green;font-weight:bold;border-bottom:5px solid #999;'><br>您的提交带有不合法参数,谢谢合作!<br><br>了解更多请点击:<a href='http://webscan.360.cn'>360网站安全检测</a></div>";  
  
        if (RawUrl())  
        {  
            HttpContext.Current.Response.Write(errmsg);  
            HttpContext.Current.Response.End();  
        }  
  
        if (CookieData())  
        {  
            HttpContext.Current.Response.Write(errmsg);  
            HttpContext.Current.Response.End();  
        }  
  
        if (HttpContext.Current.Request.UrlReferrer != null)  
        {  
            if (Referer())  
            {  
                HttpContext.Current.Response.Write(errmsg);  
                HttpContext.Current.Response.End();  
            }  
        }  
  
        if (HttpContext.Current.Request.RequestType.ToUpper() == "POST")  
        {  
            if (PostData())  
            {  
                HttpContext.Current.Response.Write(errmsg);  
                HttpContext.Current.Response.End();  
            }  
        }  
        if (HttpContext.Current.Request.RequestType.ToUpper() == "GET")  
        {  
            if (GetData())  
            {  
                HttpContext.Current.Response.Write(errmsg);  
                HttpContext.Current.Response.End();  
            }  
        }  
    }  
 
    #endregion  
 
    #region 安全检查正则  
  
    /// <summary>  
    /// 安全检查正则  
    /// </summary>  
    private const string StrRegex =  
        @"<[^>]+?style=[w]+?:expression(|(alert|confirm|prompt)|^+/v(8|9)|<[^>]*?=[^>]*?&#[^>]*?>|(and|or).{1,6}?(=|>|<|in|like)|/*.+?*/|<s*script|<s*img|EXEC|UNION.+?SELECT|UPDATE.+?SET|INSERTs+INTO.+?VALUES|(SELECT|DELETE).+?FROM|(CREATE|ALTER|DROP|TRUNCATE)s+(TABLE|DATABASE)";  
 
    #endregion  
 
    #region 检查Post数据  
  
    /// <summary>  
    /// 检查Post数据  
    /// </summary>  
    /// <returns></returns>  
    private static bool PostData()  
    {  
        bool result = false;  
  
        for (int i = 0; i < HttpContext.Current.Request.Form.Count; i++)  
        {  
            result = CheckData(HttpContext.Current.Request.Form[i]);  
            if (result)  
            {  
                break;  
            }  
        }  
        return result;  
    }  
 
    #endregion  
 
    #region 检查Get数据  
  
    /// <summary>  
    /// 检查Get数据  
    /// </summary>  
    /// <returns></returns>  
    private static bool GetData()  
    {  
        bool result = false;  
  
        for (int i = 0; i < HttpContext.Current.Request.QueryString.Count; i++)  
        {  
            result = CheckData(HttpContext.Current.Request.QueryString[i]);  
            if (result)  
            {  
                break;  
            }  
        }  
        return result;  
    }  
 
    #endregion  
 
    #region 检查Cookie数据  
  
    /// <summary>  
    /// 检查Cookie数据  
    /// </summary>  
    /// <returns></returns>  
    private static bool CookieData()  
    {  
        bool result = false;  
        for (int i = 0; i < HttpContext.Current.Request.Cookies.Count; i++)  
        {  
            result = CheckData(HttpContext.Current.Request.Cookies[i].Value.ToLower());  
            if (result)  
            {  
                break;  
            }  
        }  
        return result;  
    }  
 
    #endregion  
 
    #region 检查Referer  
  
    /// <summary>  
    /// 检查Referer  
    /// </summary>  
    /// <returns></returns>  
    private static bool Referer()  
    {  
        return CheckData(HttpContext.Current.Request.UrlReferrer.ToString());  
    }  
 
    #endregion  
 
    #region 检查当前请求路径  
  
    /// <summary>  
    /// 检查当前请求路径  
    /// </summary>  
    /// <returns></returns>  
    private static bool RawUrl()  
    {  
        return CheckData(HttpContext.Current.Request.RawUrl);  
    }  
 
    #endregion  
 
    #region 正则匹配  
  
    /// <summary>  
    /// 正则匹配  
    /// </summary>  
    /// <param name="inputData"></param>  
    /// <returns></returns>  
    private static bool CheckData(string inputData)  
    {  
        return Regex.IsMatch(inputData, StrRegex);  
    }  
 
    #endregion  
}  

　　

 

在Global.asax里调用的代码：

private void Application_BeginRequest(object sender, EventArgs e)
{
    Safe360.Procress();
}