关于IdentityServer4与ocelot博客园里已经有很多介绍我这里就不再重复了。
ocelot与IdentityServer4组合认证博客园里也有很多，但大多使用ocelot内置的认证，而且大多都是用来认证API的，查找了很多资料也没看到如何认证oidc，所以这里的ocelot实际只是作为统一入口而不参与认证，认证的完成依然在客户端。代码是使用IdentityServer4的Quickstart5_HybridAndApi 示例修改的。项目结构如下
一 ocelot网关
我们先在示例添加一个网关。
修改launchSettings.json中的端口为54660
配置文件如下
{
"ReRoutes": [
{ // MvcClient
"DownstreamPathTemplate": "/MvcClient/{route}",
"DownstreamScheme": "http",
"DownstreamHostAndPorts": [
{
"Host": "localhost",
"Port": 50891
}
],
"UpstreamPathTemplate": "/MvcClient/{route}",
"UpstreamHeaderTransform": {
"X-Forwarded-For": "{RemoteIpAddress}"
}
},
{ // signin-oidc
"DownstreamPathTemplate": "/signin-oidc",
"DownstreamScheme": "http",
"DownstreamHostAndPorts": [
{
"Host": "localhost",
"Port": 50891
}
],
"UpstreamPathTemplate": "/signin-oidc",
"UpstreamHeaderTransform": {
"X-Forwarded-For": "{RemoteIpAddress}"
}
},
{ // signout-callback-oidc
"DownstreamPathTemplate": "/signout-callback-oidc",
"DownstreamScheme": "http",
"DownstreamHostAndPorts": [
{
"Host": "localhost",
"Port": 50891
}
],
"UpstreamPathTemplate": "/signout-callback-oidc",
"UpstreamHeaderTransform": {
"X-Forwarded-For": "{RemoteIpAddress}"
}
},
{ // MyApi
"DownstreamPathTemplate": "/MyApi/{route}",
"DownstreamScheme": "http",
"DownstreamHostAndPorts": [
{
"Host": "localhost",
"Port": 50890
}
],
"UpstreamPathTemplate": "/MyApi/{route}",
"UpstreamHeaderTransform": {
"X-Forwarded-For": "{RemoteIpAddress}"
}
},
{ // IdentityServer
"DownstreamPathTemplate": "/{route}",
"DownstreamScheme": "http",
"DownstreamHostAndPorts": [
{
"Host": "localhost",
"Port": 50875
}
],
"UpstreamPathTemplate": "/IdentityServer/{route}",
"UpstreamHeaderTransform": {
"X-Forwarded-For": "{RemoteIpAddress}"
}
},
{ // IdentityServer
"DownstreamPathTemplate": "/{route}",
"DownstreamScheme": "http",
"DownstreamHostAndPorts": [
{
"Host": "localhost",
"Port": 50875
}
],
"UpstreamPathTemplate": "/{route}",
"UpstreamHeaderTransform": {
"X-Forwarded-For": "{RemoteIpAddress}"
}
}
]
}
这里我们定义3个下游服务，MvcClient，MyApi，IdentityServer，并使用路由特性把signin-oidc，signout-callback-oidc导航到MvcClient，由MvcClient负责生成最后的Cooike。并将默认路由指定到IdentityServer服务。
在ConfigureServices中添加Ocelot服务。
services.AddOcelot()
.AddCacheManager(x =>
{
x.WithDictionaryHandle();
})
.AddPolly()
在Configure中使用Ocelot中间件
app.UseOcelot().Wait();
Ocelot网关就部署完成了。
二 修改QuickstartIdentityServer配置
首先依然是修改launchSettings.json中的端口为50875
在ConfigureServices中修改AddIdentityServer配置中的PublicOrigin和IssuerUri的Url为http://localhost:54660/IdentityServer/
services.AddIdentityServer(Option =>
{
Option.PublicOrigin = "http://localhost:54660/IdentityServer/";
Option.IssuerUri = "http://localhost:54660/IdentityServer/";
})
.AddDeveloperSigningCredential()
.AddInMemoryIdentityResources(Config.GetIdentityResources())
.AddInMemoryApiResources(Config.GetApiResources())
.AddInMemoryClients(Config.GetClients())
.AddTestUsers(Config.GetUsers());
这样一来发现文档中的IdentityServer地址就变为网关的地址了，进一步实现IdentityServer的负载均衡也是没有问题的。
修改Config.cs中mvc客户端配置如下
ClientId = "mvc",
ClientName = "MVC Client",
AllowedGrantTypes = GrantTypes.HybridAndClientCredentials,
ClientSecrets =
{
new Secret("secret".Sha256())
},
// AccessTokenType = AccessTokenType.Reference,
RequireConsent = true,
RedirectUris = { "http://localhost:54660/signin-oidc" },
PostLogoutRedirectUris = { "http://localhost:54660/signout-callback-oidc" },
AllowedScopes =
{
IdentityServerConstants.StandardScopes.OpenId,
IdentityServerConstants.StandardScopes.Profile,
"api1"
},
AllowOfflineAccess = true,
//直接返回客户端需要的Claims
AlwaysIncludeUserClaimsInIdToken = true,
主要修改RedirectUris和PostLogoutRedirectUris为网关地址，在网关也设置了signin-oidc和signout-callback-oidc转发请求到Mvc客户端。
三 修改MvcClient
修改MvcClient的launchSettings.json端口为50891。
修改MvcClient的Authority地址为http://localhost:54660/IdentityServer和默认路由地址MvcClient/{controller=Home}/{action=index}/{id?}
JwtSecurityTokenHandler.DefaultInboundClaimTypeMap.Clear();
services.AddAuthentication(options =>
{
options.DefaultScheme = "Cookies";
options.DefaultChallengeScheme = "oidc";
//options.DefaultSignInScheme = CookieAuthenticationDefaults.AuthenticationScheme;
})
.AddCookie("Cookies",options=> {
options.ExpireTimeSpan = TimeSpan.FromMinutes(30);
options.SlidingExpiration = true;
})
.AddOpenIdConnect("oidc", options =>
{
options.SignInScheme = "Cookies";
options.Authority = "http://localhost:54660/IdentityServer";
options.RequireHttpsMetadata = false;
options.ClientId = "mvc";
options.ClientSecret = "secret";
options.ResponseType = "code id_token";
options.SaveTokens = true;
options.GetClaimsFromUserInfoEndpoint = true;
options.Scope.Add("api1");
options.Scope.Add("offline_access");
});
app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "MvcClient/{controller=Home}/{action=index}/{id?}");
});
修改HomeController，将相关地址修改为网关地址
public async Task<IActionResult> CallApiUsingClientCredentials()
{
var tokenClient = new TokenClient("http://localhost:54660/IdentityServer/connect/token", "mvc", "secret");
var tokenResponse = await tokenClient.RequestClientCredentialsAsync("api1");
var client = new HttpClient();
client.SetBearerToken(tokenResponse.AccessToken);
var content = await client.GetStringAsync("http://localhost:54660/MyApi/identity");
ViewBag.Json = JArray.Parse(content).ToString();
return View("json");
}
public async Task<IActionResult> CallApiUsingUserAccessToken()
{
var accessToken = await HttpContext.GetTokenAsync("access_token");
//OpenIdConnectParameterNames
var client = new HttpClient();
client.SetBearerToken(accessToken);
var content = await client.GetStringAsync("http://localhost:54660/MyApi/identity");
ViewBag.Json = JArray.Parse(content).ToString();
return View("json");
}
四 修改Api项目
Api项目修改多一点。
将MvcClient的HomeController和相关视图复制过来，模拟MVC与API同时存在的项目。
修改Api的launchSettings.json端口为50890。
修改Startup
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddDataProtection(options => options.ApplicationDiscriminator = "00000").SetApplicationName("00000");
services.AddMvc();
JwtSecurityTokenHandler.DefaultInboundClaimTypeMap.Clear();
services.AddAuthentication(options =>
{
options.DefaultScheme = "Cookies";
options.DefaultChallengeScheme = "oidc";
}).AddCookie("Cookies")
.AddOpenIdConnect("oidc", options =>
{
options.SignInScheme = "Cookies";
options.Authority = "http://localhost:54660/IdentityServer";
options.RequireHttpsMetadata = false;
options.ClientId = "mvc";
options.ClientSecret = "secret";
options.ResponseType = "code id_token";
options.SaveTokens = true;
options.GetClaimsFromUserInfoEndpoint = true;
options.Scope.Add("api1");
options.Scope.Add("offline_access");
})
.AddIdentityServerAuthentication("Bearer", options =>
{
options.Authority = "http://localhost:54660/IdentityServer";
options.RequireHttpsMetadata = false;
options.ApiSecret = "secret123";
options.ApiName = "api1";
options.SupportedTokens= SupportedTokens.Both;
});
services.AddAuthorization(option =>
{
//默认 只写 [Authorize]，表示使用oidc进行认证
option.DefaultPolicy = new AuthorizationPolicyBuilder("oidc").RequireAuthenticatedUser().Build();
//ApiController使用这个 [Authorize(Policy = "ApiPolicy")]，使用jwt认证方案
option.AddPolicy("ApiPolicy", policy =>
{
policy.AddAuthenticationSchemes(JwtBearerDefaults.AuthenticationScheme);
policy.RequireAuthenticatedUser();
});
});
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
//var options = new ForwardedHeadersOptions
//{
// ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto | ForwardedHeaders.XForwardedHost,
// ForwardLimit = 1
//};
//options.KnownNetworks.Clear();
//options.KnownProxies.Clear();
//app.UseForwardedHeaders(options);
//if (env.IsDevelopment())
//{
// app.UseDeveloperExceptionPage();
//}
//else
//{
// app.UseExceptionHandler("/Home/Error");
//}
app.UseAuthentication();
app.UseStaticFiles();
app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "MyApi/{controller=MAccount}/{action=Login}/{id?}");
});
}
}
主要添加了oidc认证配置和配置验证策略来同时支持oidc认证和Bearer认证。
修改IdentityController中的[Authorize]特性为[Authorize(Policy = "ApiPolicy")]
依次使用调试-开始执行(不调试)并选择项目名称启动QuickstartIdentityServer，Gateway，MvcClient，Api，启动方式如图
应该可以看到Gateway启动后直接显示了IdentityServer的默认首页
在浏览器输入http://localhost:54660/MVCClient/Home/index进入MVCClient
点击Secure进入需要授权的页面，这时候会跳转到登陆页面（才怪
实际上我们会遇到一个错误，这是因为ocelot做网关时下游服务获取到的Host实际为localhost:50891，而在IdentityServer中设置的RedirectUris为网关的54660，我们可以通过ocelot转发X-Forwarded-Host头，并在客户端通过UseForwardedHeaders中间件来获取头。但是UseForwardedHeaders中间件为了防止IP欺骗攻击需要设置KnownNetworks和KnownProxies以实现严格匹配。当然也可以通过清空KnownNetworks和KnownProxies的默认值来不执行严格匹配，这样一来就有可能受到攻击。所以这里我直接使用硬编码的方式设置Host，实际使用时应从配置文件获取，同时修改MvcClient和Api相关代码
app.Use(async (context, next) =>
{
context.Request.Host = HostString.FromUriComponent(new Uri("http://localhost:54660/"));
await next.Invoke();
});
//var options = new ForwardedHeadersOptions
//{
// ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto | ForwardedHeaders.XForwardedHost,
// ForwardLimit = 1
//};
//options.KnownNetworks.Clear();
//options.KnownProxies.Clear();
//app.UseForwardedHeaders(options);
在反向代理情况下通过转发X-Forwarded-Host头来获取Host地址应该时常见设置不知道还有没有其他更好的解决办法。
再次启动MVCClient并输入http://localhost:54660/MvcClient/Home/Secure。
使用bob，password登陆一下
点击Yes, Allow返回http://localhost:54660/MvcClient/Home/Secure，此时可以查看到登陆后的信息
分别点击Call API using user token和Call API using application identity来验证一下通过access_token和ClientCredent模式请求来请求API
成功获取到返回值。
输入http://localhost:54660/myapi/Home/index来查看API情况
求成功。
点击Secure从API项目查看用户信息，此时展示信息应该和MvcClient一致
嗯，并没有看到用户信息而是又到了授权页.....，这是因为.netCore使用DataProtection来保护数据（点击查看详细信息），Api项目不能解析由MvcClient生成的Cookie，而被重定向到了IdentityServer服务中。
在MvcClient和Api的ConfigureServices下添加如下代码来同步密钥环。
services.AddDataProtection(options => options.ApplicationDiscriminator = "00000").SetApplicationName("00000");
再次启动MvcClient和Api项目并在浏览器中输入http://localhost:54660/MvcClient/home/Secure，此时被要求重新授权，点击Yes, Allow后看到用户信息
再输入http://localhost:54660/myapi/Home/Secure从API项目查看用户信息
分别点击Call API using user token和Call API using application identity来验证一下通过access_token和ClientCredent模式请求来请求API
请求成功。
如此我们便实现了通过ocelot实现统一入口，通过IdentityServer4来实现认证的需求
源代码 https://github.com/saber-wang/Quickstart5_HybridAndApi
参考
https://www.cnblogs.com/stulzq/category/1060023.html
https://www.cnblogs.com/xiaoti/p/10118930.html
https://www.cnblogs.com/jackcao/tag/identityserver4/
原文地址：https://www.cnblogs.com/nasha/p/10160695.html
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