网站用户登录认证

时间:2022-10-19 14:23:52

cookie登录后同域名下的网站保持相同的登录状态。

登录

private void SetAuthCookie(string userId, bool createPersistentCookie)
{
  var
ticket = new FormsAuthenticationTicket(2, userId, DateTime.Now, DateTime.Now.AddDays(7), true, "", FormsAuthentication.FormsCookiePath);  string ticketEncrypted = FormsAuthentication.Encrypt(ticket);

  HttpCookie cookie;
  
if (createPersistentCookie)//是否在设置的过期时间内一直有效
  {
    cookie
= new HttpCookie(FormsAuthentication.FormsCookieName, ticketEncrypted)
    {
      HttpOnly
= true,
      Path
= FormsAuthentication.FormsCookiePath,
      Secure
= FormsAuthentication.RequireSSL,
      Expires
= ticket.Expiration,
      Domain = "cnblogs.com"//这里设置认证的域名,同域名下包括子域名如aa.cnblogs.com或bb.cnblogs.com都保持相同的登录状态
    };
  }
  
else
  {
    cookie
= new HttpCookie(FormsAuthentication.FormsCookieName, ticketEncrypted)
    {
      HttpOnly
= true,
      Path
= FormsAuthentication.FormsCookiePath,
      Secure
= FormsAuthentication.RequireSSL,
      //Expires = ticket.Expiration,//无过期时间的,浏览器关闭后失效
      Domain = "cnblogs.com"
    };
  }

  HttpContext.Current.Response.Cookies.Remove(FormsAuthentication.FormsCookieName);
  HttpContext.Current.Response.Cookies.Add(cookie);
}

这样登录后,在同域名下的任何页面都可以得到用户状态

判断用户是否登录

public bool IsAuthenticated
{
  get
  {
    bool isPass = System.Web.HttpContext.Current.User.Identity.IsAuthenticated;

    if (!isPass)
      SignOut();

    return isPass;
  }
}

得到当前的用户名

public string GetCurrentUserId()
{
return _httpContext.User.Identity.Name;
}

集群中每台web服务器的web.config需要设置相同的machineKey,这样只有同域名下 machineKey相同的服务器才能保持登录状态。

<system.web>
...
<machineKey validationKey="4A525ERTY83D72198CA34CD919C23F291BFF9E60223D94FDC8165E3EA3720619508A8B6695092F465AB15E0E57B3F472615DE46322B2A4A224ABDA369164DBFC" decryptionKey="646E17926C57B99B3645BB752016DCF7F79AC085E91DD54EB38A152127F20264" validation="SHA1" decryption="AES" />
...
</system.web>