C# Web开发 标准读写Cookies的方法 支持跨二级域和虚拟目录

在博客园看到另外一个朋友的可跨二级域操作Cookies方法，在它基础上完善了一下，现发出来

我参考的哪位朋友的文章地址是：http://www.cnblogs.com/voswin/articles/1281520.html

/// <summary>

/// 添加/更新 Cookies

/// </summary>

/// <param name="_domain"></param>

/// <param name="_cookiepath"></param>

/// <param name="_key"></param>

/// <param name="_cookiename"></param>

/// <param name="_value"></param>

public static void SetUserCookies(string _domain, string _cookiepath, string _key, string _cookiename, string _value, DateTime _expires)

{

HttpCookie cookie = HttpContext.Current.Request.Cookies[_key];

//防止中文乱码

_value = System.Web.HttpUtility.UrlEncode(_value);

//加密

_value = DESEncrypt.Encrypt(_value);

if (cookie == null)

{

cookie = new HttpCookie(_key);

cookie.Domain = _domain;

cookie.Path = _cookiepath;

cookie.Expires = _expires;

cookie.Values.Add(_cookiename, _value);

HttpContext.Current.Response.AppendCookie(cookie);

}

else

{

cookie.Domain = _domain;

cookie.Path = _cookiepath;

cookie.Expires = _expires;

if (cookie.Values[_cookiename] != null)

{

cookie.Values.Set(_cookiename, _value);

}

else

{

cookie.Values.Add(_cookiename, _value);

}

HttpContext.Current.Response.SetCookie(cookie);

}

}

/// <summary>

/// 读取Cookies

/// </summary>

/// <param name="_key"></param>

/// <param name="_cookiename"></param>

/// <returns></returns>

public static string GetUserCookies(string _key, string _cookiename)

{

HttpCookie cookie = HttpContext.Current.Request.Cookies[_key];

if (cookie != null)

{

string _value = cookie.Values.Get(_cookiename);

if (!string.IsNullOrEmpty(_value))

{

//防止中文乱码

_value = System.Web.HttpUtility.UrlDecode(_value);

//解密

_value = DESEncrypt.Decrypt(_value);

return _value;

}

else

{

return "";

}

}

else

{

return "";

}

}

/// <summary>

/// 清除Cookies

/// </summary>

/// <param name="_domain"></param>

/// <param name="_cookiepath"></param>

/// <param name="key"></param>

public static void ClearUserCookies(string _domain, string _cookiepath, string _key)

{

HttpCookie cookie = HttpContext.Current.Request.Cookies[_key];

if (cookie != null)

{

cookie.Values.Clear();

cookie.Domain = _domain;

cookie.Path = _cookiepath;

cookie.Expires = DateTime.Now.AddDays(-1);

HttpContext.Current.Response.SetCookie(cookie);

}

}

加密Cookies和解密Cookies方法：

加密/解密方法 DESEncrypt

public class DESEncrypt

{

#region ========加密========

/// <summary>

/// 加密

/// </summary>

/// <param name="Text"></param>

/// <returns></returns>

public static string Encrypt(string Text)

{

return Encrypt(Text, "lixyvip");

}

/// <summary>

/// 加密数据

/// </summary>

/// <param name="Text"></param>

/// <param name="sKey"></param>

/// <returns></returns>

public static string Encrypt(string Text, string sKey)

{

DESCryptoServiceProvider des = new DESCryptoServiceProvider();

byte[] inputByteArray;

inputByteArray = Encoding.Default.GetBytes(Text);

des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));

des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));

System.IO.MemoryStream ms = new System.IO.MemoryStream();

CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);

cs.Write(inputByteArray, 0, inputByteArray.Length);

cs.FlushFinalBlock();

StringBuilder ret = new StringBuilder();

foreach (byte b in ms.ToArray())

{

ret.AppendFormat("{0:X2}", b);

}

return ret.ToString();

}

#endregion

#region ========解密========

/// <summary>

/// 解密

/// </summary>

/// <param name="Text"></param>

/// <returns></returns>

public static string Decrypt(string Text)

{

return Decrypt(Text, "lixyvip");

}

/// <summary>

/// 解密数据

/// </summary>

/// <param name="Text"></param>

/// <param name="sKey"></param>

/// <returns></returns>

public static string Decrypt(string Text, string sKey)

{

try

{

DESCryptoServiceProvider des = new DESCryptoServiceProvider();

int len;

len = Text.Length / 2;

byte[] inputByteArray = new byte[len];

int x, i;

for (x = 0; x < len; x++)

{

i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);

inputByteArray[x] = (byte)i;

}

des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));

des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));

System.IO.MemoryStream ms = new System.IO.MemoryStream();

CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);

cs.Write(inputByteArray, 0, inputByteArray.Length);

cs.FlushFinalBlock();

return Encoding.Default.GetString(ms.ToArray());

}

catch

{

return Text;

}

}

#endregion

}

读取当前客户机器所有的Cookies代码：

string[] keyArr = HttpContext.Current.Request.Cookies.AllKeys;

for (int c = 0; c < keyArr.Length; c++)

{

Response.Write(HttpContext.Current.Request.Cookies[keyArr[c]].Name);

Response.Write("<br />");

Response.Write(HttpContext.Current.Request.Cookies[keyArr[c]].Expires.ToString());

Response.Write("<br />");

Response.Write(HttpContext.Current.Request.Cookies[keyArr[c]].Value);

Response.Write("<br />");

Response.Write("<br />");

}

使用或自己写重载方法参考示例：

SetUserCookies(SiteInfo.DomainName, "/", "hnce", name, str, DateTime.Now.AddMinutes(miniute));

return GetUserCookies("hnce", name);

ClearUserCookies(SiteInfo.DomainName, "/", "hnce");

另外提醒一下，cookie.Values.Add(_cookiename, _value); 跟 cookie.Values[_cookiename] = _value; 这两种方式都可以设置Cookies的值，但是Add和Set方法后，读取要使用Get方法，而Values[]赋值方式，读取要使用HttpContext.Current.Request.Cookies[_key][_cookiename].ToString()

否则有Cookies读取不了的情况。

//下面附参考文章的部分内容说明

//------------------------------------------------------------------------

Cookie有三个属性需要注意一下：

1. Domain 域

2. Path 路径

3. Expires 过期时间

跨域操作需要设置域属性:

Response.Cookies("MyCookie").Domain = "cnblogs.com"; (这里指的是泛域名)

这样在其它二级域名下就都可以访问到了， ASP 和 ASP.NET 测试通过

虚拟目录下访问：

我在ASP端做了下测试，.NET的没试, 如果不指定Path属性， 不同虚拟目录下Cookie无法共享

将Response.Cookies("MyCookie").Path = "/" 就可以了

总的写法:

Response.Cookies("MyCookie").Domain = "cnblogs.com";

Response.Cookies("MyCookie").Path = "/"

Response.Cookies("MyCookie").Expires = Now + 365;

Response.Cookies("MyCookie")("Test") = "test";