/// <summary>
    /// 網址參數內容是否有效
    /// </summary>
    public bool IsQueryStringValueValid(string execFilePath, NameValueCollection queryString)
    {
        if (queryString == null || queryString.Count == 0)
        {
            return(true);
        }

        //建立參數過濾物件
        //特殊頁面參數過濾
        SpecificPageParamFilter specificPageParam = new SpecificPageParamFilter();

        //非字串參數過濾
        NonStringParamFilter nonStringParam = new NonStringParamFilter();

        // 指定參數名單
        nonStringParam.SetIntParamList(intParams);
        nonStringParam.SetGuidParamList(guidParams);

        //有限制長度的字串參數過濾
        LimitedStringParamFilter limitedStringParam = new LimitedStringParamFilter();

        // 指定參數名稱與內容長度對照表
        limitedStringParam.SetParamValueLenLookup(paramValueLenLookup);

        //規則表達式黑名單過濾
        RegexParamFilter regexParam = new RegexParamFilter();

        regexParam.SetBlacklistPatterns(blacklistPatterns);

        //SQL Injection 過濾
        SQLInjectionFilterExt sqlInjection1 = new SQLInjectionFilterExt();

        //用 HtmlDecode 解碼參數內容
        HtmlDecodeParamValue htmlDecodeValue = new HtmlDecodeParamValue();

        //黑名單關鍵字過濾
        BlacklistKeywordFilter blacklistKw = new BlacklistKeywordFilter();

        // 指定黑名單
        blacklistKw.SetBlacklistKeywords(blacklistKeywords);

        //SQL Injection過濾
        SQLInjectionFilterExt sqlInjection2 = new SQLInjectionFilterExt();

        //建立檢查順序
        ParamFilter chainOfResponsibility = specificPageParam;

        specificPageParam.SetSuccessor(nonStringParam);
        nonStringParam.SetSuccessor(limitedStringParam);
        limitedStringParam.SetSuccessor(regexParam);
        regexParam.SetSuccessor(sqlInjection1);
        sqlInjection1.SetSuccessor(htmlDecodeValue);
        htmlDecodeValue.SetSuccessor(blacklistKw);
        blacklistKw.SetSuccessor(sqlInjection2);

        //開始檢查
        logger.Debug("checking queryString.Keys");

        foreach (string key in queryString.Keys)
        {
            if (key == null || queryString[key] == null || queryString[key].Length == 0)
            {
                logger.DebugFormat("skip key[{0}]", key);
                continue;
            }

            //檢查參數名稱
            if (Regex.IsMatch(key, "[\"']"))
            {
                logger.InfoFormat("key[{0}] Failed!", key);
                return(false);
            }

            //參數內容是否有效
            ParamFilter.ParamInfo paramInfo = new ParamFilter.ParamInfo()
            {
                Key          = key,
                Value        = queryString[key],
                ExecFilePath = execFilePath
            };

            if (!chainOfResponsibility.HandleRequest(paramInfo))
            {
                return(false);
            }
        }

        return(true);
    }
    /// <summary>
    /// POST參數內容是否有效
    /// </summary>
    public bool IsPostValueValid(string execFilePath, NameValueCollection requestForm)
    {
        if (requestForm == null || requestForm.Count == 0)
        {
            return(true);
        }

        //建立參數過濾物件
        //針對 Acunetix 送來的 Post 參數過濾
        ForAcunetixPostParamFilter forAcunetix = new ForAcunetixPostParamFilter();

        //特殊頁面參數過濾
        SpecificPageParamFilter specificPageParam = new SpecificPageParamFilter();

        //非字串參數過濾
        NonStringParamFilter nonStringParam = new NonStringParamFilter();

        // 指定參數名單
        nonStringParam.SetIntParamList(intParams);
        nonStringParam.SetGuidParamList(guidParams);

        //有限制長度的字串參數過濾
        LimitedStringParamFilter limitedStringParam = new LimitedStringParamFilter();

        // 指定參數名稱與內容長度對照表
        limitedStringParam.SetParamValueLenLookup(paramValueLenLookup);

        //規則表達式黑名單過濾
        RegexParamFilter regexParam = new RegexParamFilter();

        regexParam.SetBlacklistPatterns(blacklistPatterns);

        //用 HtmlDecode 解碼參數內容
        HtmlDecodeParamValue htmlDecodeValue = new HtmlDecodeParamValue();

        //SQL Injection過濾
        SQLInjectionFilterExt sqlInjection1 = new SQLInjectionFilterExt();

        //用 UrlDecode 解碼參數內容
        UrlDecodeParamValue urlDecodeValue = new UrlDecodeParamValue();

        //黑名單關鍵字過濾
        BlacklistKeywordFilter blacklistKw = new BlacklistKeywordFilter();

        // 指定黑名單
        blacklistKw.SetBlacklistKeywords(blacklistKeywords);

        //SQL Injection過濾
        SQLInjectionFilterExt sqlInjection2 = new SQLInjectionFilterExt();

        //建立檢查順序
        ParamFilter chainOfResponsibility = forAcunetix;

        forAcunetix.SetSuccessor(specificPageParam);
        specificPageParam.SetSuccessor(regexParam);
        regexParam.SetSuccessor(htmlDecodeValue);
        htmlDecodeValue.SetSuccessor(sqlInjection1);
        sqlInjection1.SetSuccessor(urlDecodeValue);
        urlDecodeValue.SetSuccessor(blacklistKw);
        blacklistKw.SetSuccessor(sqlInjection2);

        //開始檢查
        logger.Debug("checking requestForm.Keys");

        foreach (string key in requestForm.Keys)
        {
            if (key == null || requestForm[key] == null || requestForm[key].Length == 0)
            {
                logger.DebugFormat("skip key[{0}]", key);
                continue;
            }

            if (key.StartsWith("__"))
            {
                logger.DebugFormat("skip key[{0}]", key);
                continue;
            }

            //參數內容是否有效
            ParamFilter.ParamInfo paramInfo = new ParamFilter.ParamInfo()
            {
                Key          = key,
                Value        = requestForm[key],
                ExecFilePath = execFilePath
            };

            if (!chainOfResponsibility.HandleRequest(paramInfo))
            {
                return(false);
            }
        }

        return(true);
    }
    /// <summary>
    /// POST參數內容是否有效
    /// </summary>
    public bool IsPostValueValid(string execFilePath, NameValueCollection requestForm)
    {
        if (requestForm == null || requestForm.Count == 0)
        {
            return(true);
        }

        bool   useSimplifedChain = true;
        string lowerFileName     = execFilePath.ToLower();

        if (lowerFileName == "login.aspx" ||
            lowerFileName == "psw-change.aspx" ||
            lowerFileName == "psw-require.aspx" ||
            lowerFileName == "captcha.ashx" ||
            lowerFileName == "errorpage.aspx"
            )
        {
            useSimplifedChain = false;
        }

        //規則表達式黑名單過濾
        RegexParamFilter regexParam = new RegexParamFilter();

        regexParam.SetBlacklistPatterns(blacklistPatterns);

        //黑名單關鍵字過濾
        BlacklistKeywordFilter blacklistKw = new BlacklistKeywordFilter();

        // 指定黑名單
        blacklistKw.SetBlacklistKeywords(blacklistKeywords);
        // 指定黑名單關鍵字在特定頁面中要允許的白名單
        blacklistKw.SetWhitelistOfBlacklistKeywords(whitelistOfBlacklistKeywords);

        //建立檢查順序
        ParamFilter chainOfResponsibility = null;

        if (useSimplifedChain)
        {
            //簡易版參數過濾規則
            chainOfResponsibility = regexParam;
            regexParam.SetSuccessor(blacklistKw);
        }
        else
        {
            //針對 Acunetix 送來的 Post 參數過濾
            ForAcunetixPostParamFilter forAcunetix = new ForAcunetixPostParamFilter();

            //特殊頁面參數過濾
            SpecificPageParamFilter specificPageParam = new SpecificPageParamFilter();

            //用 HtmlDecode 解碼參數內容
            HtmlDecodeParamValue htmlDecodeValue = new HtmlDecodeParamValue();

            //SQL Injection過濾
            SQLInjectionFilterExt sqlInjection1 = new SQLInjectionFilterExt();

            //用 UrlDecode 解碼參數內容
            UrlDecodeParamValue urlDecodeValue = new UrlDecodeParamValue();

            //SQL Injection過濾
            SQLInjectionFilterExt sqlInjection2 = new SQLInjectionFilterExt();

            chainOfResponsibility = forAcunetix;
            forAcunetix.SetSuccessor(specificPageParam);
            specificPageParam.SetSuccessor(regexParam);
            regexParam.SetSuccessor(htmlDecodeValue);
            htmlDecodeValue.SetSuccessor(sqlInjection1);
            sqlInjection1.SetSuccessor(urlDecodeValue);
            urlDecodeValue.SetSuccessor(blacklistKw);
            blacklistKw.SetSuccessor(sqlInjection2);
        }

        //開始檢查
        logger.Debug("checking requestForm.Keys");

        foreach (string key in requestForm.Keys)
        {
            if (key == null || requestForm[key] == null || requestForm[key].Length == 0)
            {
                logger.DebugFormat("skip key[{0}]", key);
                continue;
            }

            if (key.StartsWith("__"))
            {
                logger.DebugFormat("skip key[{0}]", key);
                continue;
            }

            //參數內容是否有效
            ParamFilter.ParamInfo paramInfo = new ParamFilter.ParamInfo()
            {
                Key          = key,
                Value        = requestForm[key],
                ExecFilePath = execFilePath
            };

            if (!chainOfResponsibility.HandleRequest(paramInfo))
            {
                return(false);
            }
        }

        return(true);
    }