网关和服务发现

src/HelloShop.ApiService/HelloShop.ApiService.csproj

@@ -8,4 +8,8 @@
   <ItemGroup>
     <ProjectReference Include="..\HelloShop.ServiceDefaults\HelloShop.ServiceDefaults.csproj" />
   </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.ServiceDiscovery.Yarp" Version="9.0.0-preview.3.24210.17" />
+    <PackageReference Include="Yarp.ReverseProxy" Version="2.1.0" />
+  </ItemGroup>
 </Project>

src/HelloShop.ApiService/Infrastructure/ConfiguredServiceEndPoint.cs

@@ -0,0 +1,9 @@
+namespace HelloShop.ApiService.Infrastructure
+{
+    public class ConfiguredServiceEndPoint
+    {
+        public required string ServiceName { get; set; }
+
+        public IReadOnlyCollection<string>? Endpoints { get; set; }
+    }
+}

src/HelloShop.ApiService/Infrastructure/ConfiguredServiceEndPointResolver.cs

@@ -0,0 +1,35 @@
+
+using Microsoft.Extensions.Options;
+using Microsoft.Extensions.ServiceDiscovery.Abstractions;
+
+namespace HelloShop.ApiService.Infrastructure;
+
+public class ConfiguredServiceEndPointResolver(IConfiguration configuration, IOptions<ConfigurationServiceEndPointResolverOptions> resolverOptions) : IConfiguredServiceEndPointResolver
+{
+    private readonly Lazy<IReadOnlyCollection<ConfiguredServiceEndPoint>> _serviceEndPoints = new(() =>
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(resolverOptions.Value.SectionName, nameof(resolverOptions.Value.SectionName));
+
+        IConfigurationSection section = configuration.GetRequiredSection(resolverOptions.Value.SectionName);
+
+        List<ConfiguredServiceEndPoint> serviceEndPoints = [];
+
+        foreach (IConfigurationSection serviceSection in section.GetChildren())
+        {
+            string serviceName = serviceSection.Key;
+
+            serviceEndPoints.Add(new ConfiguredServiceEndPoint
+            {
+                ServiceName = serviceName,
+                Endpoints = serviceSection.GetChildren().SelectMany(x => x.Get<List<string>>() ?? []).Distinct().ToList()
+            });
+        }
+
+        return serviceEndPoints;
+    });
+
+    public async Task<IReadOnlyCollection<ConfiguredServiceEndPoint>> GetConfiguredServiceEndpointsAsync(CancellationToken cancellationToken = default)
+    {
+        return await Task.FromResult(_serviceEndPoints.Value);
+    }
+}

src/HelloShop.ApiService/Infrastructure/CustomReverseProxyConfigProvider.cs

@@ -0,0 +1,61 @@
+using Yarp.ReverseProxy.Configuration;
+using Yarp.ReverseProxy.LoadBalancing;
+
+namespace HelloShop.ApiService.Infrastructure;
+
+public class CustomReverseProxyConfigProvider(IConfiguredServiceEndPointResolver configuredServiceEndPointResolver) : IReverseProxyConfigProvider
+{
+    public async Task<IReadOnlyList<RouteConfig>> GetRoutesAsync()
+    {
+        List<RouteConfig> routeConfigs = [];
+
+        foreach (var serviceEndPoint in await configuredServiceEndPointResolver.GetConfiguredServiceEndpointsAsync())
+        {
+            string serviceName = serviceEndPoint.ServiceName;
+
+            routeConfigs.Add(new RouteConfig()
+            {
+                // Forces a new route id each time GetRoutes is called.
+                RouteId = serviceName,
+                ClusterId = serviceName,
+                Match = new RouteMatch
+                {
+                    // This catch-all pattern matches all request paths.
+                    Path = $"{serviceEndPoint.ServiceName}/{{**remainder}}"
+                },
+                Transforms = [new Dictionary<string, string> { { "PathPattern", "{**remainder}" } }]
+            });
+        }
+
+        return routeConfigs;
+    }
+
+    public async Task<IReadOnlyList<ClusterConfig>> GetClustersAsync()
+    {
+        List<ClusterConfig> clusterConfigs = [];
+
+        foreach (var serviceEndPoint in await configuredServiceEndPointResolver.GetConfiguredServiceEndpointsAsync())
+        {
+            string serviceName = serviceEndPoint.ServiceName;
+
+            string? address = serviceEndPoint.Endpoints?.OrderBy(x => x)?.FirstOrDefault();
+
+            if (!string.IsNullOrWhiteSpace(address))
+            {
+                UriBuilder uriBuilder = new(address) { Host = serviceName };
+
+                clusterConfigs.Add(new ClusterConfig()
+                {
+                    ClusterId = serviceName,
+                    LoadBalancingPolicy = LoadBalancingPolicies.FirstAlphabetical,
+                    Destinations = new Dictionary<string, DestinationConfig>(StringComparer.OrdinalIgnoreCase)
+                        {
+                            { "destination1", new DestinationConfig() { Address = uriBuilder.ToString() } }
+                        },
+                });
+            }
+        }
+
+        return clusterConfigs;
+    }
+}

src/HelloShop.ApiService/Infrastructure/IConfiguredServiceEndPointResolver.cs

@@ -0,0 +1,6 @@
+namespace HelloShop.ApiService.Infrastructure;
+
+public interface IConfiguredServiceEndPointResolver
+{
+    public Task<IReadOnlyCollection<ConfiguredServiceEndPoint>> GetConfiguredServiceEndpointsAsync(CancellationToken cancellationToken = default);
+}

src/HelloShop.ApiService/Infrastructure/IReverseProxyConfigProvider.cs

@@ -0,0 +1,10 @@
+using Yarp.ReverseProxy.Configuration;
+
+namespace HelloShop.ApiService.Infrastructure;
+
+public interface IReverseProxyConfigProvider
+{
+    Task<IReadOnlyList<RouteConfig>> GetRoutesAsync();
+
+    Task<IReadOnlyList<ClusterConfig>> GetClustersAsync();
+}

src/HelloShop.ApiService/Program.cs

@@ -1,39 +1,37 @@
+using HelloShop.ApiService.Infrastructure;
+using Yarp.ReverseProxy.Configuration;
+
 var builder = WebApplication.CreateBuilder(args);
 
 // Add service defaults & Aspire components.
 builder.AddServiceDefaults();
 
 // Add services to the container.
-builder.Services.AddProblemDetails();
+builder.Services.AddControllers().AddDataAnnotationsLocalization();
+
+builder.Services.AddHttpForwarderWithServiceDiscovery();
+
+builder.Services.AddReverseProxy()
+    .LoadFromConfig(builder.Configuration.GetSection("ReverseProxy"))
+    .LoadFromMemory(routes: [], clusters: []);
+
+builder.Services.AddSingleton<IConfiguredServiceEndPointResolver, ConfiguredServiceEndPointResolver>();
+builder.Services.AddSingleton<IReverseProxyConfigProvider, CustomReverseProxyConfigProvider>();
 
 var app = builder.Build();
 
-// Configure the HTTP request pipeline.
-app.UseExceptionHandler();
-
-var summaries = new[]
-{
-    "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
-};
-
-app.MapGet("/weatherforecast", () =>
-{
-    var forecast =  Enumerable.Range(1, 5).Select(index =>
-        new WeatherForecast
-        (
-            DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
-            Random.Shared.Next(-20, 55),
-            summaries[Random.Shared.Next(summaries.Length)]
-        ))
-        .ToArray();
-    return forecast;
-});
-
 app.MapDefaultEndpoints();
 
-app.Run();
+app.Services.GetRequiredService<IHostApplicationLifetime>().ApplicationStarted.Register(async () =>
-
-record WeatherForecast(DateOnly Date, int TemperatureC, string? Summary)
 {
-    public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
+    IReverseProxyConfigProvider provider = app.Services.GetRequiredService<IReverseProxyConfigProvider>();
-}
+    IReadOnlyList<RouteConfig> routes = await provider.GetRoutesAsync();
+    IReadOnlyList<ClusterConfig> clusters = await provider.GetClustersAsync();
+    app.Services.GetRequiredService<InMemoryConfigProvider>().Update(routes, clusters);
+});
+
+app.MapReverseProxy();
+
+app.MapControllers();
+
+app.Run();

src/HelloShop.ApiService/Properties/launchSettings.json

@@ -5,7 +5,7 @@
       "commandName": "Project",
       "dotnetRunMessages": true,
       "launchBrowser": true,
-      "launchUrl": "weatherforecast",
+      "launchUrl": "swagger",
       "applicationUrl": "http://localhost:5391",
       "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"

src/HelloShop.ApiService/appsettings.json

@@ -5,5 +5,29 @@
       "Microsoft.AspNetCore": "Warning"
     }
   },
-  "AllowedHosts": "*"
+  "AllowedHosts": "*",
-}
+  "ReverseProxy": {
+    "Routes": {
+      "testserviceRoute": {
+        "ClusterId": "testServiceCluster",
+        "Match": {
+          "Path": "testservice/{**remainder}"
+        },
+        "Transforms": [
+          {
+            "PathPattern": "{**remainder}"
+          }
+        ]
+      }
+    },
+    "Clusters": {
+      "testServiceCluster": {
+        "Destinations": {
+          "testServiceCluster/destination1": {
+            "Address": "http://identityservice"
+          }
+        }
+      }
+    }
+  }
+}

src/HelloShop.AppHost/Program.cs

@@ -1,14 +1,18 @@
 var builder = DistributedApplication.CreateBuilder(args);
 
-var apiservice = builder.AddProject<Projects.HelloShop_ApiService>("apiservice");
+var identityService = builder.AddProject<Projects.HelloShop_IdentityService>("identityservice");
 
-builder.AddProject<Projects.HelloShop_IdentityService>("identityservice");
+var orderingService=builder.AddProject<Projects.HelloShop_OrderingService>("orderingservice").WithReference(identityService);
 
-builder.AddProject<Projects.HelloShop_OrderingService>("orderingservice");
+var productService = builder.AddProject<Projects.HelloShop_ProductService>("productservice").WithReference(identityService);
 
-builder.AddProject<Projects.HelloShop_ProductService>("productservice");
+var basketService = builder.AddProject<Projects.HelloShop_BasketService>("basketservice").WithReference(identityService);
 
-builder.AddProject<Projects.HelloShop_BasketService>("basketservice");
+var apiservice = builder.AddProject<Projects.HelloShop_ApiService>("apiservice")
+.WithReference(identityService)
+.WithReference(orderingService)
+.WithReference(productService)
+.WithReference(basketService);
 
 builder.AddProject<Projects.HelloShop_WebApp>("webapp").WithReference(apiservice);
 

src/HelloShop.ProductService/Program.cs

@@ -22,10 +22,7 @@ builder.Services.AddCustomLocalization();
 builder.Services.AddOpenApi();
 builder.Services.AddModelMapper().AddModelValidator();
 builder.Services.AddLocalization().AddPermissionDefinitions();
-builder.Services.AddAuthorization().AddRemotePermissionChecker(options =>
+builder.Services.AddAuthorization().AddRemotePermissionChecker().AddCustomAuthorization();
-{
-    options.ApiEndpoint = "https://localhost:5001";
-}).AddCustomAuthorization();
 // End addd extensions services to the container.
 
 var app = builder.Build();

src/HelloShop.ServiceDefaults/Authorization/RemotePermissionChecker.cs

@@ -9,10 +9,8 @@ using System.Net.Http.Json;
 
 namespace HelloShop.ServiceDefaults.Authorization;
 
-public class RemotePermissionChecker(IHttpContextAccessor httpContextAccessor, IDistributedCache distributedCache, IHttpClientFactory httpClientFactory, IOptions<RemotePermissionCheckerOptions> options) : PermissionChecker(httpContextAccessor, distributedCache)
+public class RemotePermissionChecker(IHttpContextAccessor httpContextAccessor, IDistributedCache distributedCache, IHttpClientFactory httpClientFactory) : PermissionChecker(httpContextAccessor, distributedCache)
 {
-    private readonly RemotePermissionCheckerOptions _remotePermissionCheckerOptions = options.Value;
-
     public override async Task<bool> IsGrantedAsync(int roleId, string permissionName, string? resourceType = null, string? resourceId = null)
     {
         string? accessToken = await HttpContext.GetTokenAsync("access_token");
@@ -21,7 +19,7 @@ public class RemotePermissionChecker(IHttpContextAccessor httpContextAccessor, I
 
         httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
 
-        httpClient.BaseAddress = new Uri(_remotePermissionCheckerOptions.ApiEndpoint);
+        httpClient.BaseAddress = new Uri("http://identityservice");
 
         Dictionary<string, string?> parameters = new()
         {

src/HelloShop.ServiceDefaults/Authorization/RemotePermissionCheckerOptions.cs

@@ -1,6 +0,0 @@
-namespace HelloShop.ServiceDefaults.Authorization;
-
-public class RemotePermissionCheckerOptions
-{
-    public string ApiEndpoint { get; set; } = default!;
-}

src/HelloShop.ServiceDefaults/Extensions/PermissionExtensions.cs

@@ -65,10 +65,8 @@ public static class PermissionExtensions
         return routeGroup;
     }
 
-    public static IServiceCollection AddRemotePermissionChecker(this IServiceCollection services, Action<RemotePermissionCheckerOptions> configureOptions)
+    public static IServiceCollection AddRemotePermissionChecker(this IServiceCollection services)
     {
-        services.Configure(configureOptions);
-
         services.AddTransient<IPermissionChecker, RemotePermissionChecker>();
 
         return services;