實用的請求類 (c#)

using System;
using System.Web;

namespace EmanUtils
{
    /**//// <summary>
    /// RequestHelper 的摘要說明。
    /// 請求類
    /// </summary>
    public class RequestHelper
    {
        public RequestHelper()
        {
            //
            // TODO: 在此處添加構造函數邏輯
            //
        }

        /**//// <summary>
        /// 判斷當前頁面是否接收到了Post請求
        /// </summary>
        /// <returns>是否接收到了Post請求</returns>
        public static bool IsPost()
        {
            return HttpContext.Current.Request.HttpMethod.Equals("POST");
        }
        /**//// <summary>
        /// 判斷當前頁面是否接收到了Get請求
        /// </summary>
        /// <returns>是否接收到了Get請求</returns>
        public static bool IsGet()
        {
            return HttpContext.Current.Request.HttpMethod.Equals("GET");
        }

        /**//// <summary>
        /// 返回指定的服務器變量信息
        /// </summary>
        /// <param name="strName">服務器變量名</param>
        /// <returns>服務器變量信息</returns>
        public static string GetServerString(string strName)
        {
            //
            if (HttpContext.Current.Request.ServerVariables[strName] == null)
            {
                return "";
            }
            return HttpContext.Current.Request.ServerVariables[strName].ToString();
        }

        /**//// <summary>
        /// 返回上一個頁面的地址
        /// </summary>
        /// <returns>上一個頁面的地址</returns>
        public static string GetUrlReferrer()
        {
            string retVal = null;
    
            try
            {
                retVal = HttpContext.Current.Request.UrlReferrer.ToString();
            }
            catch{}
            
            if (retVal == null)
                return "";
    
            return retVal;

        }
        
        /**//// <summary>
        /// 得到當前完整主機頭
        /// </summary>
        /// <returns></returns>
        public static string GetCurrentFullHost()
        {
            HttpRequest request = System.Web.HttpContext.Current.Request;
            if (!request.Url.IsDefaultPort)
            {
                return string.Format("{0}:{1}", request.Url.Host, request.Url.Port.ToString());
            }
            return request.Url.Host;
        }

        /**//// <summary>
        /// 得到主機頭
        /// </summary>
        /// <returns></returns>
        public static string GetHost()
        {
            return HttpContext.Current.Request.Url.Host;
        }


        /**//// <summary>
        /// 獲取當前請求的原始 URL(URL 中域信息之後的部分,包括查詢字符串(如果存在))
        /// </summary>
        /// <returns>原始 URL</returns>
        public static string GetRawUrl()
        {
            return HttpContext.Current.Request.RawUrl;
        }

        /**//// <summary>
        /// 判斷當前訪問是否來自瀏覽器軟件
        /// </summary>
        /// <returns>當前訪問是否來自瀏覽器軟件</returns>
        public static bool IsBrowserGet()
        {
            string[] BrowserName = {"ie", "opera", "netscape", "mozilla"};
            string curBrowser = HttpContext.Current.Request.Browser.Type.ToLower();
            for (int i = 0; i < BrowserName.Length; i++)
            {
                if (curBrowser.IndexOf(BrowserName[i]) >= 0)
                {
                    return true;
                }
            }
            return false;
        }

        /**//// <summary>
        /// 判斷是否來自搜索引擎鏈接
        /// </summary>
        /// <returns>是否來自搜索引擎鏈接</returns>
        public static bool IsSearchEnginesGet()
        {
            string[] SearchEngine = {"google", "yahoo", "msn", "baidu", "sogou", "sohu", "sina", "163", "lycos", "tom"};
            string tmpReferrer = HttpContext.Current.Request.UrlReferrer.ToString().ToLower();
            for (int i = 0; i < SearchEngine.Length; i++)
            {
                if (tmpReferrer.IndexOf(SearchEngine[i]) >= 0)
                {
                    return true;
                }
            }
            return false;
        }

        /**//// <summary>
        /// 獲得當前完整Url地址
        /// </summary>
        /// <returns>當前完整Url地址</returns>
        public static string GetUrl()
        {
            return HttpContext.Current.Request.Url.ToString();
        }
        

        /**//// <summary>
        /// 獲得指定Url參數的值
        /// </summary>
        /// <param name="strName">Url參數</param>
        /// <returns>Url參數的值</returns>
        public static string GetQueryString(string strName)
        {
            if (HttpContext.Current.Request.QueryString[strName] == null)
            {
                return "";
            }
            return HttpContext.Current.Request.QueryString[strName];
        }

        /**//// <summary>
        /// 獲得當前頁面的名稱
        /// </summary>
        /// <returns>當前頁面的名稱</returns>
        public static string GetPageName()
        {
            string [] urlArr = HttpContext.Current.Request.Url.AbsolutePath.Split('/');
            return urlArr[urlArr.Length - 1].ToLower();
        }

        /**//// <summary>
        /// 返回表單或Url參數的總個數
        /// </summary>
        /// <returns></returns>
        public static int GetParamCount()
        {
            return HttpContext.Current.Request.Form.Count + HttpContext.Current.Request.QueryString.Count;
        }


        /**//// <summary>
        /// 獲得指定表單參數的值
        /// </summary>
        /// <param name="strName">表單參數</param>
        /// <returns>表單參數的值</returns>
        public static string GetFormString(string strName)
        {
            if (HttpContext.Current.Request.Form[strName] == null)
            {
                return "";
            }
            return HttpContext.Current.Request.Form[strName];
        }

        /**//// <summary>
        /// 獲得Url或表單參數的值, 先判斷Url參數是否爲空字符串, 如爲True則返回表單參數的值
        /// </summary>
        /// <param name="strName">參數</param>
        /// <returns>Url或表單參數的值</returns>
        public static string GetString(string strName)
        {
            if ("".Equals(GetQueryString(strName)))
            {
                return GetFormString(strName);
            }
            else
            {
                return GetQueryString(strName);
            }
        }


        /**//// <summary>
        /// 獲得指定Url參數的int類型值
        /// </summary>
        /// <param name="strName">Url參數</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>Url參數的int類型值</returns>
        public static int GetQueryInt(string strName, int defValue)
        {
            return Utils.StrToInt(HttpContext.Current.Request.QueryString[strName], defValue);
        }


        /**//// <summary>
        /// 獲得指定表單參數的int類型值
        /// </summary>
        /// <param name="strName">表單參數</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>表單參數的int類型值</returns>
        public static int GetFormInt(string strName, int defValue)
        {
            return Utils.StrToInt(HttpContext.Current.Request.Form[strName], defValue);
        }

        /**//// <summary>
        /// 獲得指定Url或表單參數的int類型值, 先判斷Url參數是否爲缺省值, 如爲True則返回表單參數的值
        /// </summary>
        /// <param name="strName">Url或表單參數</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>Url或表單參數的int類型值</returns>
        public static int GetInt(string strName, int defValue)
        {
            if (GetQueryInt(strName, defValue) == defValue)
            {
                return GetFormInt(strName, defValue);
            }
            else
            {
                return GetQueryInt(strName, defValue);
            }
        }

        /**//// <summary>
        /// 獲得指定Url參數的float類型值
        /// </summary>
        /// <param name="strName">Url參數</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>Url參數的int類型值</returns>
        public static float GetQueryFloat(string strName, float defValue)
        {
            return Utils.StrToFloat(HttpContext.Current.Request.QueryString[strName], defValue);
        }


        /**//// <summary>
        /// 獲得指定表單參數的float類型值
        /// </summary>
        /// <param name="strName">表單參數</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>表單參數的float類型值</returns>
        public static float GetFormFloat(string strName, float defValue)
        {
            return Utils.StrToFloat(HttpContext.Current.Request.Form[strName], defValue);
        }
        
        /**//// <summary>
        /// 獲得指定Url或表單參數的float類型值, 先判斷Url參數是否爲缺省值, 如爲True則返回表單參數的值
        /// </summary>
        /// <param name="strName">Url或表單參數</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>Url或表單參數的int類型值</returns>
        public static float GetFloat(string strName, float defValue)
        {
            if (GetQueryFloat(strName, defValue) == defValue)
            {
                return GetFormFloat(strName, defValue);
            }
            else
            {
                return GetQueryFloat(strName, defValue);
            }
        }

        /**//// <summary>
        /// 獲得當前頁面客戶端的IP
        /// </summary>
        /// <returns>當前頁面客戶端的IP</returns>
        public static string GetIP()
        {


            string result = String.Empty;

            result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
            if (null == result || result == String.Empty)
            {
                result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
            }

            if (null == result || result == String.Empty)
            {
                result = HttpContext.Current.Request.UserHostAddress;
            }

            if (null == result || result == String.Empty)
            {
                return "0.0.0.0";
            }

            return result;

        }

        /**//// <summary>
        /// 保存用戶上傳的文件
        /// </summary>
        /// <param name="path">保存路徑</param>
        public static void SaveRequestFile(string path)
        {
            if (HttpContext.Current.Request.Files.Count > 0)
            {
                HttpContext.Current.Request.Files[0].SaveAs(path);
            }
        }

        
    }
}