asp.net单一登录
2021-03-14 08:31
标签：踢出 prot tco basepage web eve public Nid tor asp.net 使用 Application 限制单一登录 原理：用户登录后系统会分配一个与用户唯一对应的SessionID，将当前用户ID与其SessionID对应保存在Application中，一旦该用户在其他地方重复登录则Application中保存的SessionID就会被更新，导致当前session中的SessionID与Application中的SessionID不再一致 用户登录后保存SessionID在Application中 判断方法 aspx页面跳转时判断：添加基类 BasePage.cs ashx页面请求时判断：添加基类 BaseHandler.cs asp.net单一登录 标签：踢出 prot tco basepage web eve public Nid tor 原文地址：https://www.cnblogs.com/qiu18359243869/p/12812226.html
private static void RecordLogin(string strUId)
{
HttpContext.Current.Application.Lock();
HttpContext.Current.Application["SESSIONID_" + strUId] = HttpContext.Current.Session.SessionID;
HttpContext.Current.Application.UnLock();
}
public static bool CheckRepeatLogin(string strUId)
{
object objSessionId = HttpContext.Current.Application["SESSIONID_" + strUId];
if (objSessionId == null || objSessionId.ToString() == "") return false;
return objSessionId.ToString() != HttpContext.Current.Session.SessionID;
}
public class BasePage:System.Web.UI.Page
{
public UserInfo CurUser = null;
protected override void OnInitComplete(EventArgs e)
{
CurUser = CurSession.CurUser;
if (CurUser == null)
{
Response.Redirect(SysHelper.GetVirtualPath() + "pagesessionnull.html", true);
}
if (LoginService.CheckRepeatLogin(CurUser.UId))
{
Response.Redirect(SysHelper.GetVirtualPath() + "pagerepeatlogin.html", true);
}
base.OnInitComplete(e);
}
protected override void OnLoadComplete(EventArgs e)
{
Response.Cache.SetNoStore();
base.OnLoadComplete(e);
}
}
public class BaseHandler : IHttpHandler, IRequiresSessionState
{
public UserInfo CurUser = null;
public HttpContext CurContext = null;
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "application/json";
context.Response.Charset = "utf-8";
context.Response.Cache.SetCacheability(HttpCacheability.NoCache);
try
{
CurUser = CurSession.CurUser;
CurContext = context;
if (CurUser == null)
{
context.Response.Write(JsonHelper.GetResult(false, "登录超时，请重新登录", new { rcode = -98 }));
}
else if (LoginService.CheckRepeatLogin(CurUser.UId))
{
context.Response.Write(JsonHelper.GetResult(false, "您的帐号在其他地方登录，您已经被踢出，请重新登录", new { rcode = -99 }));
}
else
{
context.Response.Write(ActionMethod());
}
}
catch (Exception ex)
{
context.Response.Write(JsonHelper.GetResult(ex.Message.ToString()));
}
finally
{
context.Response.End();
}
}
public virtual string ActionMethod()
{
return JsonHelper.GetResult();
}
public bool IsReusable
{
get
{
return false;
}
}
}
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