ASP.NET Request对象

using System;
using System.Web;
using System.Text.RegularExpressions;

namespace WMSWeb.Common
{
/// <summary>
/// Request操作类
/// </summary>
public class WMSRequest
{
/// <summary>
/// 判断当前页面是否接收到了Post请求
/// </summary>
/// <returns>是否接收到了Post请求</returns>
public static bool IsPost()
{
return HttpContext.Current.Request.HttpMethod.Equals("POST");
}
/// <summary>
/// 判断当前页面是否接收到了Get请求
/// </summary>
/// <returns>是否接收到了Get请求</returns>
public static bool IsGet()
{
return HttpContext.Current.Request.HttpMethod.Equals("GET");
}

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

/// <summary>
/// 返回上一个页面的地址
/// </summary>
/// <returns>上一个页面的地址</returns>
public static string GetUrlReferrer()
{
string retVal = null;

try
{
retVal = HttpContext.Current.Request.UrlReferrer.ToString();
}
catch { }

if (retVal == null)
return "";

return retVal;

}

/// <summary>
/// 得到当前完整主机头
/// </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>
/// 得到主机头
/// </summary>
/// <returns></returns>
public static string GetHost()
{
return HttpContext.Current.Request.Url.Host;
}

/// <summary>
/// 获取当前请求的原始 URL(URL 中域信息之后的部分,包括查询字符串(如果存在))
/// </summary>
/// <returns>原始 URL</returns>
public static string GetRawUrl()
{
return HttpContext.Current.Request.RawUrl;
}

/// <summary>
/// 判断当前访问是否来自浏览器软件
/// </summary>
/// <returns>当前访问是否来自浏览器软件</returns>
public static bool IsBrowserGet()
{
string[] BrowserName = { "ie", "opera", "netscape", "mozilla", "konqueror", "firefox" };
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>
/// 判断是否来自搜索引擎链接
/// </summary>
/// <returns>是否来自搜索引擎链接</returns>
public static bool IsSearchEnginesGet()
{
if (HttpContext.Current.Request.UrlReferrer == null)
{
return false;
}
string[] SearchEngine = { "google", "yahoo", "msn", "baidu", "sogou", "sohu", "sina", "163", "lycos", "tom", "yisou", "iask", "soso", "gougou", "zhongsou" };
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>
/// 获得当前完整Url地址
/// </summary>
/// <returns>当前完整Url地址</returns>
public static string GetUrl()
{
return HttpContext.Current.Request.Url.ToString();
}

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

/// <summary>
/// 获得当前页面的名称
/// </summary>
/// <returns>当前页面的名称</returns>
public static string GetPageName()
{
string[] urlArr = HttpContext.Current.Request.Url.AbsolutePath.Split('/');
return urlArr[urlArr.Length - 1].ToLower();
}

/// <summary>
/// 返回表单或Url参数的总个数
/// </summary>
/// <returns></returns>
public static int GetParamCount()
{
return HttpContext.Current.Request.Form.Count + HttpContext.Current.Request.QueryString.Count;
}

/// <summary>
/// 获得指定表单参数的值
/// </summary>
/// <param name="strName">表单参数</param>
/// <returns>表单参数的值</returns>
public static string GetFormString(string strName)
{
if (HttpContext.Current.Request.Form[strName] == null)
{
return "";
}
return SqlFix(HttpContext.Current.Request.Form[strName]);
}

/// <summary>
/// 获得Url或表单参数的值, 先判断Url参数是否为空字符串, 如为True则返回表单参数的值
/// </summary>
/// <param name="strName">参数</param>
/// <returns>Url或表单参数的值</returns>
public static string GetString(string strName)
{
var value = GetQueryString(strName);
if (String.IsNullOrEmpty(value))
{
return GetFormString(strName);
}
return value;
}

/// <summary>
/// 过滤Sql关键字
/// </summary>
/// <param name="strName"></param>
/// <returns></returns>
public static string SqlFix(string strName)
{
strName = strName.Replace("+", "＋");
strName = strName.Replace("--", "－－");
strName = strName.Replace("/*", "／＊");
strName = strName.Replace("*/", "＊／");
strName = strName.Replace("0x", "０ｘ");
strName = strName.Replace("'", "''");
//Regex r = null;
Match m = null;
Regex RegexBr = new Regex(@"(delete)", RegexOptions.IgnoreCase);
for (m = RegexBr.Match(strName); m.Success; m = m.NextMatch())
{
strName = strName.Replace(m.Groups[0].ToString(), "");
}

m = null;
RegexBr = new Regex(@"(drop)", RegexOptions.IgnoreCase);
for (m = RegexBr.Match(strName); m.Success; m = m.NextMatch())
{
strName = strName.Replace(m.Groups[0].ToString(), "");
}

m = null;
RegexBr = new Regex(@"(insert)", RegexOptions.IgnoreCase);
for (m = RegexBr.Match(strName); m.Success; m = m.NextMatch())
{
strName = strName.Replace(m.Groups[0].ToString(), "");
}

m = null;
RegexBr = new Regex(@"(select)", RegexOptions.IgnoreCase);
for (m = RegexBr.Match(strName); m.Success; m = m.NextMatch())
{
strName = strName.Replace(m.Groups[0].ToString(), "");
}

//m = null;
//RegexBr = new Regex(@"(update)", RegexOptions.IgnoreCase);
//for (m = RegexBr.Match(strName); m.Success; m = m.NextMatch())
//{
//    strName = strName.Replace(m.Groups[0].ToString(), "");
//}

m = null;
RegexBr = new Regex(@"(grant)", RegexOptions.IgnoreCase);
for (m = RegexBr.Match(strName); m.Success; m = m.NextMatch())
{
strName = strName.Replace(m.Groups[0].ToString(), "");
}

m = null;
RegexBr = new Regex(@"(declare)", RegexOptions.IgnoreCase);
for (m = RegexBr.Match(strName); m.Success; m = m.NextMatch())
{
strName = strName.Replace(m.Groups[0].ToString(), "");
}

m = null;
RegexBr = new Regex(@"(exec)", RegexOptions.IgnoreCase);
for (m = RegexBr.Match(strName); m.Success; m = m.NextMatch())
{
strName = strName.Replace(m.Groups[0].ToString(), "");
}

return strName;
}

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

/// <summary>
/// 获得指定表单参数的int类型值
/// </summary>
/// <param name="strName">表单参数</param>
/// <param name="defValue">缺省值</param>
/// <returns>表单参数的int类型值</returns>
public static int GetFormInt(string strName, int defValue)
{
return Utils.StrToInt(HttpContext.Current.Request.Form[strName], defValue);
}

/// <summary>
/// 获得指定Url或表单参数的int类型值, 先判断Url参数是否为缺省值, 如为True则返回表单参数的值
/// </summary>
/// <param name="strName">Url或表单参数</param>
/// <param name="defValue">缺省值</param>
/// <returns>Url或表单参数的int类型值</returns>
public static int GetInt(string strName, int defValue)
{
if (GetQueryInt(strName, defValue) == defValue)
{
return GetFormInt(strName, defValue);
}
else
{
return GetQueryInt(strName, defValue);
}
}

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

/// <summary>
/// 获得指定表单参数的float类型值
/// </summary>
/// <param name="strName">表单参数</param>
/// <param name="defValue">缺省值</param>
/// <returns>表单参数的float类型值</returns>
public static float GetFormFloat(string strName, float defValue)
{
return Utils.StrToFloat(HttpContext.Current.Request.Form[strName], defValue);
}

/// <summary>
/// 获得指定Url或表单参数的float类型值, 先判断Url参数是否为缺省值, 如为True则返回表单参数的值
/// </summary>
/// <param name="strName">Url或表单参数</param>
/// <param name="defValue">缺省值</param>
/// <returns>Url或表单参数的int类型值</returns>
public static float GetFloat(string strName, float defValue)
{
if (GetQueryFloat(strName, defValue) == defValue)
{
return GetFormFloat(strName, defValue);
}
else
{
return GetQueryFloat(strName, defValue);
}
}

/// <summary>
/// 获得当前页面客户端的IP
/// </summary>
/// <returns>当前页面客户端的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 || !Utils.IsIP(result))
{
return "0.0.0.0";
}

return result;

}

/// <summary>
/// 保存用户上传的文件
/// </summary>
/// <param name="path">保存路径</param>
public static void SaveRequestFile(string path)
{
if (HttpContext.Current.Request.Files.Count > 0)
{
HttpContext.Current.Request.Files[0].SaveAs(path);
}
}

/// <summary>
/// Textarea输入内容转换成Html格式
/// </summary>
/// <param name="strName">参数</param>
/// <returns>Url或表单参数的值</returns>
public static string Text2Html(string strName)
{
//strName = strName.Replace("\r\n", "<br>");
strName = strName.Replace("\n", "<br>");
strName = strName.Replace("\r", "<br>");
strName = strName.Replace("<br><br>", "<br>");
strName = strName.Replace("<br><br>", "<br>");
return strName;
}
public static string Html2Text(string strName)
{
strName = strName.Replace("<br>", "\n");
return strName;
}

public static string GetScript(string scrip)
{
return String.Format("<script>{0}</script>", scrip);
}

//        /// <summary>
//        /// 保存上传的文件
//        /// </summary>
//        /// <param name="MaxAllowFileCount">最大允许的上传文件个数</param>
//        /// <param name="MaxAllowFileSize">最大允许的文件长度(单位: KB)</param>
//        /// <param name="AllowFileExtName">允许的文件扩展名, 以string[]形式提供</param>
//        /// <param name="AllowFileType">允许的文件类型, 以string[]形式提供</param>
//        /// <param name="Dir">目录</param>
//        /// <returns></returns>
//        public static Forum.AttachmentInfo[] SaveRequestFiles(int MaxAllowFileCount, int MaxAllowFileSize, string[] AllowFileExtName, string[] AllowFileType, string Dir)
//        {
//            int savefilecount = 0;
//
//            int fcount = Math.Min(MaxAllowFileCount, HttpContext.Current.Request.Files.Count);
//
//            Forum.AttachmentInfo[] attachmentinfo = new Forum.AttachmentInfo[fcount];
//            for(int i=0;i<fcount;i++)
//            {
//                string filename = HttpContext.Current.Request.Files[i].FileName;
//                string fileextname = filename.Substring(filename.LastIndexOf("."));
//                string filetype = HttpContext.Current.Request.Files[i].ContentType;
//                int filesize = HttpContext.Current.Request.Files[i].ContentLength;
//                // 判断 文件扩展名/文件大小/文件类型 是否符合要求
//                if(Utils.InArray(fileextname, AllowFileExtName) && (filesize <= MaxAllowFileSize * 1024) && Utils.InArray(filetype, AllowFileType))
//                {
//
//                    HttpContext.Current.Request.Files[i].SaveAs(Dir + Utils.GetDateTime() + Environment.TickCount.ToString() + fileextname);
//                    attachmentinfo[savefilecount].Filename = filename;
//                    attachmentinfo[savefilecount].Filesize = filesize;
//                    attachmentinfo[savefilecount].Description = filetype;
//                    attachmentinfo[savefilecount].Filetype = fileextname;
//                    savefilecount++;
//                }
//            }
//            return attachmentinfo;
//
//        }

}
}