.net core 1.0 实现负载多服务器单点登录

前言

　　.net core 出来有一时间了，这段时间也一直在做技术准备，目前想做一个单点登录（SSO）系统，在这之前用.net时我用习惯了machineKey ,也顺手在.net core 中尝试了一上，结果发现不好使了，也不起作用，于是开始了网上学习。

实现方法

　　功夫不负有心人，网上高人还是多，在github.com上面ISSUES中也有人在讨论此问题，于是找到代码尝试，结果实现了。

　　直接上代码，我们需要先封装一个XmlRepository，Key的格式如下：

<?xml version="1.0" encoding="utf-8"?>
<key id="cbb8a41a-9ca4-4a79-a1de-d39c4e307d75" version="1">
  <creationDate>2016-07-23T10:09:49.1888876Z</creationDate>
  <activationDate>2016-07-23T10:09:49.1388521Z</activationDate>
  <expirationDate>2116-10-21T10:09:49.1388521Z</expirationDate>
  <descriptor deserializerType="Microsoft.AspNetCore.DataProtection.AuthenticatedEncryption.ConfigurationModel.AuthenticatedEncryptorDescriptorDeserializer, Microsoft.AspNetCore.DataProtection, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60">
    <descriptor>
      <encryption algorithm="AES_256_CBC" />
      <validation algorithm="HMACSHA256" />
      <masterKey p4:requiresEncryption="true" xmlns:p4="http://schemas.asp.net/2015/03/dataProtection">
        <!-- Warning: the key below is in an unencrypted form. -->
        <value>WYgZNh/3dOKRYJ1OAhVqs56pWPMHei15Uj44DPLWbYUiCpNVEBwqDfYAUq/4jBKYrNoUbaRkGY5o/NZ6a2NTwA==</value>
      </masterKey>
    </descriptor>
  </descriptor>
</key>

XmlRepository代码：

    public class CustomFileXmlRepository : IXmlRepository
    {
        private readonly string filePath = @"C:\keys\key.xml";

        public virtual IReadOnlyCollection<XElement> GetAllElements()
        {
            return GetAllElementsCore().ToList().AsReadOnly();
        }

        private IEnumerable<XElement> GetAllElementsCore()
        {
            yield return XElement.Load(filePath);
        }
        public virtual void StoreElement(XElement element, string friendlyName)
        {
            if (element == null)
            {
                throw new ArgumentNullException(nameof(element));
            }
            StoreElementCore(element, friendlyName);
        }

        private void StoreElementCore(XElement element, string filename)
        {
        }
    }

Startup代码：

    public class Startup
    {
        public Startup(IHostingEnvironment env)
        {
            var builder = new ConfigurationBuilder()
                .SetBasePath(env.ContentRootPath)
                .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
                .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
                .AddEnvironmentVariables();
            Configuration = builder.Build();
        }

        public IConfigurationRoot Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddSingleton<IXmlRepository, CustomFileXmlRepository>();
            services.AddDataProtection(configure =>
            {
                configure.ApplicationDiscriminator = "Htw.Web";
            });
            // Add framework services.
            services.AddMvc();
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            loggerFactory.AddConsole(Configuration.GetSection("Logging"));
            loggerFactory.AddDebug();

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseBrowserLink();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }

            app.UseStaticFiles();

            app.UseCookieAuthentication(new CookieAuthenticationOptions()
            {
                AuthenticationScheme = CookieAuthenticationDefaults.AuthenticationScheme,
                LoginPath = new PathString("/Account/Unauthorized/"),
                AccessDeniedPath = new PathString("/Account/Forbidden/"),
                AutomaticAuthenticate = true,
                AutomaticChallenge = false,
                CookieHttpOnly = true,
                CookieName = "MyCookie",
                ExpireTimeSpan = TimeSpan.FromHours(2),
#if !DEBUG
                CookieDomain="h.cn",
#endif
                DataProtectionProvider = null
            });
            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });
        }
    }

登录代码：

        public async void Login()
        {
            if (!HttpContext.User.Identities.Any(identity => identity.IsAuthenticated))
            {
                var user = new ClaimsPrincipal(new ClaimsIdentity(new[] { new Claim(ClaimTypes.Name, "bob") }, CookieAuthenticationDefaults.AuthenticationScheme));
                await HttpContext.Authentication.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme, user);

                HttpContext.Response.ContentType = "text/plain";
                await HttpContext.Response.WriteAsync("Hello First timer");
            }
            else
            {
                HttpContext.Response.ContentType = "text/plain";
                await HttpContext.Response.WriteAsync("Hello old timer");
            }
        }

注意 

C:\keys\key.xml 这个文件路径可以更改，还有就是也可用共享目录或数据库来实现统一管理

到此可以登录试一下。