///

/// Web请求安全类 ///

publicclass RequestKeeper { ///

/// 获取查询字符串字符值 ///

/// /// publicstaticstring GetQuerryString(string key) { string s = GetQuerry(key); return InputText(s); } ///

///获取查询字符串数字值 ///

/// /// publicstaticint GetQuerryInt(string key) { int i =0; int.TryParse(GetQuerryString(key), out i); return i; } #region Utilities privatestaticstring GetQuerry(string key) { string s =""; if (System.Web.HttpContext.Current.Request.QueryString[key] !=null) { s = System.Web.HttpContext.Current.Request.QueryString[key]; } return s; } #endregion ///

/// 获取表单字符值 ///

/// /// publicstaticstring GetFormString(string strText) { return InputText(strText); } ///

/// 获取表单数字值 ///

/// /// publicstaticint GetFormInt(string strText) { strText = GetFormString(strText); int i =0; int.TryParse(strText, out i); return i; } #region Utilities ///

/// 验证是否为正整数 ///

/// /// publicstaticbool IsInt(string str) { return Regex.IsMatch(str, @"^[0-9]*$"); } ///

/// 验证是否为日期格式的字符串 ///

/// /// publicstaticbool IsDateString(string str) { return Regex.IsMatch(str, @"(\d{4})-(\d{1,2})-(\d{1,2})"); } ///

/// 返回 HTML 字符串的编码结果 ///

///字符串 ///编码结果 publicstaticstring HtmlEncode(string str) { return HttpUtility.HtmlEncode(str); } ///

/// 返回 HTML 字符串的解码结果 ///

///字符串 ///解码结果 publicstaticstring HtmlDecode(string str) { return HttpUtility.HtmlDecode(str); } ///

/// 返回 URL 字符串的编码结果 ///

///字符串 ///编码结果 publicstaticstring UrlEncode(string str) { return HttpUtility.UrlEncode(str); } ///

/// 返回 URL 字符串的编码结果 ///

///字符串 ///解码结果 publicstaticstring UrlDecode(string str) { return HttpUtility.UrlDecode(str); } ///

/// HH:mm:ss ///

///日期字符串 publicstaticstring GetTime() { return GetDateTime("HH:mm:ss", null); } ///

/// yyyy-MM-dd ///

///日期字符串 publicstaticstring GetDate() { return GetDateTime("yyyy-MM-dd", null); } ///

/// yyyy-MM-dd HH:mm:ss ///

///日期字符串 publicstaticstring GetDateTime() { return GetDateTime("yyyy-MM-dd HH:mm:ss", null); } ///

/// yyyy-MM-dd HH:mm:ss ///

///需要增加的天数 ///日期字符串 publicstaticstring GetDateTime(int adddays) { return DateTime.Now.AddDays(adddays).ToString("yyyy-MM-dd HH:mm:ss"); } ///

/// 自定义日期 ///

///日期格式 如：yyyy-MM-dd ///默认日期 如：2010-10-10 ///日期字符串 publicstaticstring GetDateTime(string formats, string defaultd) { if (string.IsNullOrEmpty(formats)) { formats ="yyyy-MM-dd"; } if (string.IsNullOrEmpty(defaultd)) { defaultd = DateTime.Now.ToString("yyyy-MM-dd"); } string d =""; try { d = DateTime.Now.ToString(formats); } catch (FormatException e) { d = Convert.ToDateTime(defaultd).ToString("yyyy-MM-dd"); } return d; } ///

/// 清除所有脚本 ///

/// /// privatestaticstring InputText(string inputText) { if (inputText ==null) return""; inputText = Regex.Replace(inputText, "[\\s]{2,}", ""); inputText = Regex.Replace(inputText, "(<[b|B][r|R]/*>)+|(<[p|P](.|\\n)*?>)", "\n"); inputText = Regex.Replace(inputText, "(\\s*&[n|N][b|B][s|S][p|P];\\s*)+", ""); inputText = Regex.Replace(inputText, "<(.|\\n)*?>", ""); inputText = inputText.Replace("'", "''"); return Filter(inputText); } ///

///

/// 过滤危险字符 ///

/// /// publicstaticstring Filter(string input) { if ((input ==null) || (input =="")) { returnnull; } string p =@"exec[\s]{1,}|insert[\s]{1,}into[\s]{1,}|select[\s\S]{1,}from|delete[\s]{1,}|update[\s]{1,}|truncate[\s]{1,}table|--"; MatchCollection matches = Regex.Matches(input, p, RegexOptions.IgnoreCase); foreach (Match m in matches) { input = input.Replace(m.Value, ""); } return input; } #endregion }

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