自定义OWIN CookieAuthenticationProvider在第一次/冷启动时失败

Question

我们有一个自定义cookie身份验证提供程序,它将auth cookie设置为主机名,.domain.com而不是domain.com或my.domain.com.我们这样做,因此cookie可用于所有子域和域.它很简单,如下所示.

问题

在应用程序冷启动后的第一次尝试中,cookie STILL承载域my.domain.com(我们的登录已开启my.domain.com)DESPITE .domain.com在执行SubdomainCookieAuthentication下面的代码后将其设置为(使用断点检查).在后续登录尝试中,cookie主机名很好.

题

我该如何解决这个问题,即使在第一次尝试时也能正常工作？

码

自定义cookie身份验证

public class SubdomainCookieAuthentication : CookieAuthenticationProvider
{
    public override void ResponseSignIn(CookieResponseSignInContext context)
    {
        // We need to add a "." in front of the domain name to 
        // allow the cookie to be used on all sub-domains too
        var hostname = context.Request.Uri.Host;
        // works for www.google.com => google.com
        // will FAIL for www.google.co.uk (gives co.uk) but doesn't apply to us
        var dotTrimmedHostname = Regex.Replace(hostname, @"^.*(\.\S+\.\S+)", "$1");
        context.Options.CookieDomain = dotTrimmedHostname;            
        base.ResponseSignIn(context);
    }
}

这在Owin启动类中初始化如下

类: Startup

文件: App_start\Startup.Auth.cs

public void ConfigureAuth(IAppBuilder app) 
{
    app.UseCookieAuthentication(new CookieAuthenticationOptions
    {
        AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
        LoginPath = new PathString("/Account/Login"),
        Provider = new SubdomainCookieAuthentication()
    });
}

Answer 1

我遇到了同样的问题，第一次尝试使用 ResponseSignIn 方法时未设置 Cookie 域。我通过将 Owin 库更新到 3.x 并使用新的 CookieManager 设置域来解决这个问题。从这篇文章中找到了这个解决方案：

Owin 如何在 Application_EndRequest 阶段之后设置 Asp.Net 身份验证 cookie？

public class ChunkingCookieManagerWithSubdomains : ICookieManager
{
    private readonly ChunkingCookieManager _chunkingCookieManager;

    public ChunkingCookieManagerWithSubdomains()
    {
        _chunkingCookieManager = new ChunkingCookieManager();
    }

    public string GetRequestCookie(IOwinContext context, string key)
    {
        return _chunkingCookieManager.GetRequestCookie(context, key);
    }

    public void AppendResponseCookie(IOwinContext context, string key, string value, CookieOptions options)
    {
        options.Domain = context.Request.Uri.GetHostWithoutSubDomain();
        _chunkingCookieManager.AppendResponseCookie(context, key, value, options);
    }

    public void DeleteCookie(IOwinContext context, string key, CookieOptions options)
    {
        options.Domain = context.Request.Uri.GetHostWithoutSubDomain();
        _chunkingCookieManager.DeleteCookie(context, key, options);
    }
}

public static class UriExtensions
{
    public static string GetHostWithoutSubDomain(this Uri url)
    {
        if (url.HostNameType == UriHostNameType.Dns)
        {
            string host = url.Host;
            if (host.Split('.').Length > 2)
            {
                int lastIndex = host.LastIndexOf(".");
                int index = host.LastIndexOf(".", lastIndex - 1);
                return host.Substring(index + 1);
            }
            else
            {
                return host;
            }
        }

        return null;
    }
}

然后，在Startup.Auth.cs中注册它

app.UseCookieAuthentication(new CookieAuthenticationOptions
    {
        ...
        CookieManager = new ChunkingCookieManagerWithSubdomains(), 
        ...
    }
);