（十）React Ant Design Pro + .Net5 WebApi：后端环境搭建-IdentityServer4（二）授权模式
2024-08-24 23:40:16
一、前言
先交代一下整个Demo项目结构：
- 一个认证服务（端口5000）
IdentityServer4.Authentication - 五个授权模式（两个控制台程序，三个MVC项目端口5001）文件夹
GrantClient - 两个资源服务（WebApi：UserApiResource端口8000，ProductApiResource端口9000）文件夹
ApiResource
二、准备认证服务 + 资源服务
1、认证服务
（1）新建一个MVC项目，安装 IdentityServer4 ，注册五种授权模式客户端，代码如下
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddControllersWithViews();
services.AddIdentityServer()
.AddDeveloperSigningCredential() //临时证书
.AddInMemoryClients(InMemoryConfig.GetClients()) //客户端模式，InMemory内存数据
.AddInMemoryApiScopes(InMemoryConfig.GetApiScopes()) //作用域
.AddInMemoryApiResources(InMemoryConfig.GetApiResources()) //资源
.AddTestUsers(InMemoryConfig.GetTestUser()) //用户
.AddInMemoryIdentityResources(InMemoryConfig.IdentityResources);
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
}
app.UseIdentityServer(); //使用IdentityServer4
app.UseStaticFiles();
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Home}/{action=Index}/{id?}");
});
}
}
public class InMemoryConfig
{
public static IEnumerable<IdentityResource> IdentityResources =>
new IdentityResource[]
{
new IdentityResources.OpenId(),
new IdentityResources.Profile(),
//new IdentityResources.Email(),
//new IdentityResources.Address(),
//new IdentityResources.Phone()
};
/// <summary>
/// ApiResource 资源列表
/// </summary>
public static IEnumerable<ApiResource> GetApiResources()
{
return new[]
{
new ApiResource("UserApiResource", "获取用户信息API")
{
Scopes={ "UserScope" }
},
new ApiResource("ProductApiResource", "获取商品信息API")
{
Scopes={ "ProductScope" }
}
};
}
/// <summary>
/// ApiScopes 作用域
/// </summary>
public static IEnumerable<ApiScope> GetApiScopes()
{
return new ApiScope[]
{
new ApiScope("UserScope"),
new ApiScope("ProductScope")
};
}
/// <summary>
/// Client 客户端
/// </summary>
public static IEnumerable<Client> GetClients()
{
return new[]
{
//客户端模式
new Client
{
ClientId = "ClientCredentials",
ClientName = "ClientCredentials",
ClientSecrets = new [] { new Secret("ClientCredentials".Sha256()) },
AllowedGrantTypes = GrantTypes.ClientCredentials,
AllowedScopes = new [] { "UserScope" }
},
//密码模式
new Client
{
ClientId = "ResourceOwnerPasswordCredentials",
ClientName = "ResourceOwnerPasswordCredentials",
ClientSecrets = new [] { new Secret("ResourceOwnerPasswordCredentials".Sha256()) },
AllowedGrantTypes = GrantTypes.ResourceOwnerPassword,
AllowedScopes = new []
{
"ProductScope",
IdentityServerConstants.StandardScopes.OpenId,
IdentityServerConstants.StandardScopes.Profile,
}
},
//简化模式
new Client
{
ClientId = "Implicit",
ClientName = "Implicit",
AllowedGrantTypes = GrantTypes.Implicit,
RedirectUris = { "https://localhost:5001/signin-oidc" },
PostLogoutRedirectUris = { "https://localhost:5001/signout-callback-oidc" },
RequireConsent = true,
AllowedScopes = new []{
"UserScope",
"ProductScope",
IdentityServerConstants.StandardScopes.OpenId,
IdentityServerConstants.StandardScopes.Profile,
}
},
//授权码模式
new Client
{
ClientId = "AuthorizationCode",
ClientName = "AuthorizationCode",
ClientSecrets = new [] { new Secret("AuthorizationCode".Sha256()) },
AllowedGrantTypes = GrantTypes.Code,
RedirectUris = { "https://localhost:5001/signin-oidc" },
PostLogoutRedirectUris = { "https://localhost:5001/signout-callback-oidc" },
RequireConsent = true,
AllowedScopes = new []{
"UserScope",
"ProductScope",
IdentityServerConstants.StandardScopes.OpenId,
IdentityServerConstants.StandardScopes.Profile,
}
},
//混合模式
new Client
{
ClientId = "Hybrid",
ClientName = "Hybrid",
ClientSecrets = new [] { new Secret("Hybrid".Sha256()) },
AllowedGrantTypes = GrantTypes.Hybrid,
RedirectUris = { "https://localhost:5001/signin-oidc" },
PostLogoutRedirectUris = { "https://localhost:5001/signout-callback-oidc" },
RequireConsent = true,
RequirePkce = false,
AllowedScopes = new []{
"UserScope",
"ProductScope",
IdentityServerConstants.StandardScopes.OpenId,
IdentityServerConstants.StandardScopes.Profile,
//IdentityServerConstants.StandardScopes.Email,
//IdentityServerConstants.StandardScopes.Address,
//IdentityServerConstants.StandardScopes.Phone
}
},
};
}
public static List<TestUser> GetTestUser()
{
return new List<TestUser>(){
new TestUser
{
SubjectId = "1",
Username = "WinterSir",
Password = "WinterSir",
Claims =
{
new Claim(JwtClaimTypes.Name,"WinterSir"),
new Claim(JwtClaimTypes.GivenName,"WinterSir"),
new Claim(JwtClaimTypes.FamilyName,"WinterSir-FamilyName"),
new Claim(JwtClaimTypes.Email,"641187567@qq.com"),
new Claim(JwtClaimTypes.EmailVerified,"true", ClaimValueTypes.Boolean),
new Claim(JwtClaimTypes.WebSite,"http://WinterSir.com"),
new Claim(JwtClaimTypes.Address,@" [ 'street_address': 'Chang Ping', 'locality': 'BeiJing' ,'postal_code’: 102206,'country': 'China'}",
IdentityServerConstants.ClaimValueTypes.Json)
}
}
};
}
}
（2）cmddotnet new is4ui安装Quickstart UI模板，删除原来 Controllers 中 HomeController 防止冲突，设置5000端口启动
2、资源服务
新建两个WebApi项目，安装IdentityServer4.AccessTokenValidation，分别修改Startup、Controller，设置8000、9000端口启动
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
services.AddSwaggerGen(c =>
{
c.SwaggerDoc("v1", new OpenApiInfo { Title = "ProductApiResource", Version = "v1" });
});
//集成端口为5000的认证服务
services.AddAuthentication("Bearer")
.AddIdentityServerAuthentication(options =>
{
options.Authority = "https://localhost:5000";
options.ApiName = "ProductApiResource";
});
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
app.UseSwagger();
app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "ProductApiResource v1"));
}
app.UseRouting();
app.UseAuthentication();//鉴权
app.UseAuthorization();//授权
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
三、授权模式
1、客户端授权模式
客户端模式（Client Credentials）指客户端以自己的名义，而不是以用户的名义，向"认证服务"进行认证。如果是提前约束好的客户端，直接给你颁发令牌 token
安装IdentityModel
class Program
{
/// <summary>
/// 客户端模式（Client Credentials）
/// </summary>
/// <param name="args"></param>
static void Main(string[] args)
{
Console.WriteLine("***************** 客户端模式（Client Credentials）*****************");
var client = new HttpClient();
var disco = client.GetDiscoveryDocumentAsync("https://localhost:5000/").Result;
if (disco.IsError)
{
Console.WriteLine(disco.Error);
return;
}
var tokenResponse = client.RequestClientCredentialsTokenAsync(new ClientCredentialsTokenRequest
{
Address = disco.TokenEndpoint,
ClientId = "ClientCredentials",
ClientSecret = "ClientCredentials",
Scope = "UserScope"
}).Result;
if (tokenResponse.IsError)
{
Console.WriteLine(tokenResponse.Error);
return;
}
Console.WriteLine("\nToken: " + tokenResponse.AccessToken);
var apiClient = new HttpClient();
apiClient.SetBearerToken(tokenResponse.AccessToken);
var response = apiClient.GetAsync("https://localhost:8000/User/Get").Result;
if (!response.IsSuccessStatusCode)
{
Console.WriteLine(response.StatusCode);
}
else
{
var content = response.Content.ReadAsStringAsync().Result;
Console.WriteLine("\n结果: " + content);
}
Console.ReadLine();
}
}
2、密码模式
密码模式（Resource Owner Password Credentials）中客户端使用用户提供的用户名和密码，向"认证服务"进行认证，有较高风险，通常只有在其他授权模式无法执行的情况下，才能考虑使用这种模式。相较于客户端多了一个用户角色。
安装IdentityModel
static void Main(string[] args)
{
Console.WriteLine("***************** 密码模式（Resource Owner Password credentials）***************** ");
var client = new HttpClient();
var disco = client.GetDiscoveryDocumentAsync("https://localhost:5000/").Result;
if (disco.IsError)
{
Console.WriteLine(disco.Error);
return;
}
var tokenResponse = client.RequestPasswordTokenAsync(new PasswordTokenRequest()
{
Address = disco.TokenEndpoint,
ClientId = "ResourceOwnerPasswordCredentials",
ClientSecret = "ResourceOwnerPasswordCredentials",
UserName = "WinterSir",
Password = "WinterSir",
Scope = "ProductScope",
}).Result;
if (tokenResponse.IsError)
{
Console.WriteLine(tokenResponse.Error);
return;
}
Console.WriteLine("\nToken: " + tokenResponse.AccessToken);
var apiClient = new HttpClient();
apiClient.SetBearerToken(tokenResponse.AccessToken);
var response = apiClient.GetAsync("https://localhost:9000/Product/Get").Result;
if (!response.IsSuccessStatusCode)
{
Console.WriteLine(response.StatusCode);
}
else
{
var content = response.Content.ReadAsStringAsync().Result;
Console.WriteLine("\n结果: " + content);
}
Console.ReadLine();
}
3、简化模式
简化模式（Implicit）比授权码模式少了code环节，所有步骤在浏览器中完成，令牌对访问者是可见的，且客户端不需要认证，该模式是很不安全的，且不支持refresh token，适用于 Web 安全要求不高的场景，设置较短时效的 token。
（1）安装IdentityServer4.AccessTokenValidation、Microsoft.AspNetCore.Authentication.OpenIdConnect，修改Startup
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
//关闭Jwt映射
JwtSecurityTokenHandler.DefaultMapInboundClaims = false;
//注册授权
services.AddAuthentication(options =>
{
options.DefaultScheme = "Cookies";
options.DefaultChallengeScheme = "oidc";
})
.AddCookie("Cookies")
.AddOpenIdConnect("oidc", options =>
{
options.Authority = "https://localhost:5000"; //认证服务
options.RequireHttpsMetadata = true; //必须使用Https，否则用户无法登录
options.ClientId = "Implicit";
options.ClientSecret = "Implicit";
options.SaveTokens = true; //表示Token要存储
});
services.AddControllersWithViews().AddRazorRuntimeCompilation();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
}
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseHttpsRedirection();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Home}/{action=Index}/{id?}");
});
}
}
（2）_Layout.cshtml添加 注销按钮
<div class="navbar-collapse collapse d-sm-inline-flex justify-content-between">
<ul class="navbar-nav flex-grow-1">
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Index">Home</a>
</li>
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
</li>
</ul>
<a class="nav-link text-dark float-right" asp-area="" asp-controller="Home" asp-action="Logout">Logout</a>
</div>
（3）HomeController添加对应功能，需要认证的方法加上特性[Authorize]
[Authorize]
public IActionResult Privacy()
{
return View();
}
//注销
public IActionResult Logout()
{
return SignOut("Cookies", "oidc");
}
（4）修改Privacy.cshtml
@{
ViewData["Title"] = "Privacy Policy";
}
<h1>@ViewData["Title"]</h1>
@using Microsoft.AspNetCore.Authentication
<h2>Claims</h2>
<dl>
@foreach (var claim in User.Claims)
{
<dt>@claim.Type</dt>
<dd>@claim.Value</dd>
}
</dl>
<h2>Properties</h2>
<dl>
@foreach (var prop in (await Context.AuthenticateAsync()).Properties.Items)
{
<dt>@prop.Key</dt>
<dd>@prop.Value</dd>
}
</dl>
（5）效果图
4、授权码模式
授权码模式（Authorization Code）不同于简化模式直接返回token，而是先返回一个授权码，再用授权码去请求token，然后携带访问Api资源。授权码模式是功能最完整、流程最严密的授权模式。
（1）安装IdentityServer4.AccessTokenValidation、Microsoft.AspNetCore.Authentication.OpenIdConnect，修改Startup
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
//关闭Jwt映射
JwtSecurityTokenHandler.DefaultMapInboundClaims = false;
//注册授权
services.AddAuthentication(options =>
{
options.DefaultScheme = "Cookies";
options.DefaultChallengeScheme = "oidc";
})
.AddCookie("Cookies")
.AddOpenIdConnect("oidc", options =>
{
options.Authority = "https://localhost:5000"; //认证服务
options.RequireHttpsMetadata = true; //必须使用Https，否则用户无法登录
options.ClientId = "AuthorizationCode";
options.ClientSecret = "AuthorizationCode";
options.ResponseType = "code";
options.Scope.Clear();
options.Scope.Add("UserScope");
options.Scope.Add("ProductScope");
options.Scope.Add(OidcConstants.StandardScopes.OpenId);
options.Scope.Add(OidcConstants.StandardScopes.Profile);
//options.Scope.Add(OidcConstants.StandardScopes.Email);
//options.Scope.Add(OidcConstants.StandardScopes.Phone);
//options.Scope.Add(OidcConstants.StandardScopes.Address);
options.SaveTokens = true; //表示Token要存储
});
services.AddControllersWithViews().AddRazorRuntimeCompilation();
services.AddControllers().AddJsonOptions(options =>
{
options.JsonSerializerOptions.Encoder = JavaScriptEncoder.Create(UnicodeRanges.All);
});
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
}
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseHttpsRedirection();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Home}/{action=Index}/{id?}");
});
}
}
（2）_Layout.cshtml添加 获取用户按钮、注销按钮
<div class="navbar-collapse collapse d-sm-inline-flex justify-content-between">
<ul class="navbar-nav flex-grow-1">
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Index">Home</a>
</li>
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
</li>
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="User">UserApi</a>
</li>
</ul>
<a class="nav-link text-dark float-right" asp-area="" asp-controller="Home" asp-action="Logout">Logout</a>
</div>
（3）HomeController添加对应功能，需要认证的方法加上特性[Authorize]
[Authorize]
public IActionResult Privacy()
{
return View();
}
[Authorize]
public async Task<IActionResult> User()
{
var client = new HttpClient();
var accessToken = await HttpContext.GetTokenAsync(OpenIdConnectParameterNames.AccessToken);
if (string.IsNullOrEmpty(accessToken))
{
return Json(new { msg = "accesstoken 获取失败" });
}
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
var httpResponse = await client.GetAsync("https://localhost:8000/User/Get");
var result = await httpResponse.Content.ReadAsStringAsync();
if (!httpResponse.IsSuccessStatusCode)
{
ViewBag.Result = new { msg = "请求 User/Get 失败", error = result };
}
ViewBag.Result = new { msg = "成功", data = result };
return View();
}
//注销
public IActionResult Logout()
{
return SignOut("Cookies", "oidc");
}
（4）修改Privacy.cshtml
@{
ViewData["Title"] = "Privacy Policy";
}
<h1>@ViewData["Title"]</h1>
@using Microsoft.AspNetCore.Authentication
<h2>Claims</h2>
<dl>
@foreach (var claim in User.Claims)
{
<dt>@claim.Type</dt>
<dd>@claim.Value</dd>
}
</dl>
<h2>Properties</h2>
<dl>
@foreach (var prop in (await Context.AuthenticateAsync()).Properties.Items)
{
<dt>@prop.Key</dt>
<dd>@prop.Value</dd>
}
</dl>
（5）效果图
5、混合模式
混合模式（Hybrid Flow）
它为我们提供了两全其美的优势，身份令牌通过浏览器传输，因此客户端可以在进行任何更多工作之前对其进行验证。如果验证成功，客户端会通过令牌服务的以获取访问令牌
（1）安装IdentityServer4.AccessTokenValidation、Microsoft.AspNetCore.Authentication.OpenIdConnect，修改Startup
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
//关闭Jwt映射
JwtSecurityTokenHandler.DefaultMapInboundClaims = false;
//注册授权
services.AddAuthentication(options =>
{
options.DefaultScheme = "Cookies";
options.DefaultChallengeScheme = "oidc";
})
.AddCookie("Cookies")
.AddOpenIdConnect("oidc", options =>
{
options.Authority = "https://localhost:5000"; //认证服务
options.RequireHttpsMetadata = true; //必须使用Https，否则用户无法登录
options.ClientId = "Hybrid";
options.ClientSecret = "Hybrid";
options.ResponseType = "code id_token";
options.Scope.Clear();
options.Scope.Add("UserScope");
options.Scope.Add("ProductScope");
options.Scope.Add(OidcConstants.StandardScopes.OpenId);
options.Scope.Add(OidcConstants.StandardScopes.Profile);
//options.Scope.Add(OidcConstants.StandardScopes.Email);
//options.Scope.Add(OidcConstants.StandardScopes.Phone);
//options.Scope.Add(OidcConstants.StandardScopes.Address);
//options.Scope.Add(OidcConstants.StandardScopes.0fflineAccess);//获取到刷新Token
options.SaveTokens = true; //表示Token要存储
});
services.AddControllersWithViews().AddRazorRuntimeCompilation();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
}
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseHttpsRedirection();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Home}/{action=Index}/{id?}");
});
}
}
（2）_Layout.cshtml添加 获取产品、注销按钮
<div class="navbar-collapse collapse d-sm-inline-flex justify-content-between">
<ul class="navbar-nav flex-grow-1">
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Index">Home</a>
</li>
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
</li>
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Product">ProductApi</a>
</li>
</ul>
<a class="nav-link text-dark float-right" asp-area="" asp-controller="Home" asp-action="Logout">Logout</a>
</div>
（3）HomeController添加对应功能，需要认证的方法加上特性[Authorize]
[Authorize]
public IActionResult Privacy()
{
return View();
}
[Authorize]
public async Task<IActionResult> Product()
{
var client = new HttpClient();
var accessToken = await HttpContext.GetTokenAsync(OpenIdConnectParameterNames.AccessToken);
if (string.IsNullOrEmpty(accessToken))
{
return Json(new { msg = "accesstoken 获取失败" });
}
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
var httpResponse = await client.GetAsync("https://localhost:9000/Product/Get");
var result = await httpResponse.Content.ReadAsStringAsync();
if (!httpResponse.IsSuccessStatusCode)
{
ViewBag.Result = new { msg = "请求 User/Get 失败", error = result };
}
ViewBag.Result = new { msg = "成功", data = result };
return View();
}
//注销
public IActionResult Logout()
{
return SignOut("Cookies", "oidc");
}
（4）修改Privacy.cshtml
@{
ViewData["Title"] = "Privacy Policy";
}
<h1>@ViewData["Title"]</h1>
@using Microsoft.AspNetCore.Authentication
<h2>Claims</h2>
<dl>
@foreach (var claim in User.Claims)
{
<dt>@claim.Type</dt>
<dd>@claim.Value</dd>
}
</dl>
<h2>Properties</h2>
<dl>
@foreach (var prop in (await Context.AuthenticateAsync()).Properties.Items)
{
<dt>@prop.Key</dt>
<dd>@prop.Value</dd>
}
</dl>
（5）效果图
四、问题踩坑
1、Https
Demo全部用的Https，Mvc客户端配置RequireHttpsMetadata = true如果使用http遇到认证服无法务登录问题，可参考以下地址
https://www.cnblogs.com/i3yuan/p/14033016.html#autoid-20-0-0
2、ResponseType
授权码模式、混合模式需要修改客户端配置ResponseType，ResponseType = "code" 、 ResponseType = "code id_token"
3、RequirePkce
混合模式需要修改对应服务端注册客户端时配置RequirePkce = false，这样不需要客户端提供code challeng
4、其他Error
出现错误大概率是客户端、服务端配置项问题，仔细对比一下就OK了
五、前人栽树，后人乘凉
https://www.cnblogs.com/i3yuan/category/1777690.html
六、代码已上传
https://github.com/WinterSir/IdentityServer4.GrantTypesDemo
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