Сахарова Дарья Лаб. 2 Группа 6513

Api.Gateway/Api.Gateway.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+	<PropertyGroup>
+		<TargetFramework>net8.0</TargetFramework>
+		<Nullable>enable</Nullable>
+		<ImplicitUsings>enable</ImplicitUsings>
+	</PropertyGroup>
+
+	<ItemGroup>
+		<PackageReference Include="Ocelot" Version="24.1.0" />
+	</ItemGroup>
+
+	<ItemGroup>
+		<ProjectReference Include="..\CourseApp.ServiceDefaults\CourseApp.ServiceDefaults.csproj" />
+	</ItemGroup>
+
+</Project>

Api.Gateway/LoadBalancers/WeightedRandom.cs

@@ -0,0 +1,51 @@
+using Ocelot.LoadBalancer.Interfaces;
+using Ocelot.Responses;
+using Ocelot.Values;
+
+namespace Api.Gateway.LoadBalancers;
+
+/// <summary>
+/// Балансировщик нагрузки, выбирающий downstream-сервис случайным образом с учётом весов.
+/// Чем больше вес у сервиса, тем выше вероятность его выбора.
+/// Веса задаются в конфигурации (<c>WeightedRandom:Weights</c>) и применяются к сервисам в порядке их перечисления в маршруте Ocelot.
+/// </summary>
+/// <param name="services">Фабричная функция получения списка downstream-сервисов.</param>
+/// <param name="configuration">Конфигурация приложения с секцией весов.</param>
+public class WeightedRandom(Func<Task<List<Service>>> services, IConfiguration configuration) : ILoadBalancer
+{
+    private static readonly object _locker = new();
+    private readonly int[] _weights = configuration
+        .GetSection("WeightedRandom:Weights")
+        .Get<int[]>() ?? [1, 1, 1, 1, 1];
+    private readonly Random _random = new(111);
+
+    public string Type => nameof(WeightedRandom);
+
+    public async Task<Response<ServiceHostAndPort>> LeaseAsync(HttpContext httpContext)
+    {
+        var serviceList = await services();
+
+        if (serviceList.Count == 0)
+            throw new InvalidOperationException("Нет доступных сервисов");
+
+        lock (_locker)
+        {
+            var totalWeight = 0;
+            for (var i = 0; i < serviceList.Count; i++)
+                totalWeight += i < _weights.Length ? _weights[i] : 1;
+
+            var threshold = _random.Next(totalWeight);
+            var cumulative = 0;
+            for (var i = 0; i < serviceList.Count; i++)
+            {
+                cumulative += i < _weights.Length ? _weights[i] : 1;
+                if (threshold < cumulative)
+                    return new OkResponse<ServiceHostAndPort>(serviceList[i].HostAndPort);
+            }
+
+            return new OkResponse<ServiceHostAndPort>(serviceList[^1].HostAndPort);
+        }
+    }
+
+    public void Release(ServiceHostAndPort hostAndPort) { }
+}

Api.Gateway/Program.cs

@@ -0,0 +1,33 @@
+using Api.Gateway.LoadBalancers;
+using CourseApp.ServiceDefaults;
+using Ocelot.DependencyInjection;
+using Ocelot.Middleware;
+
+var builder = WebApplication.CreateBuilder(args);
+
+builder.AddServiceDefaults();
+builder.Services.AddServiceDiscovery();
+builder.Configuration.AddJsonFile("ocelot.json", optional: false, reloadOnChange: true);
+builder.Services.AddOcelot()
+    .AddCustomLoadBalancer((sp, _, provider) =>
+        new WeightedRandom(provider.GetAsync, sp.GetRequiredService<IConfiguration>()));
+
+builder.Services.AddCors(options =>
+{
+    options.AddPolicy("wasm", policy =>
+    {
+        policy.AllowAnyOrigin()
+        .WithMethods("GET")
+        .WithHeaders("Content-Type");
+    });
+});
+
+var app = builder.Build();
+
+app.UseCors("wasm");
+
+app.MapDefaultEndpoints();
+
+await app.UseOcelot();
+
+app.Run();

Api.Gateway/Properties/launchSettings.json

@@ -0,0 +1,38 @@
+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:46205",
+      "sslPort": 44343
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "http://localhost:5200",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "https://localhost:7186;http://localhost:5200",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

Api.Gateway/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

Api.Gateway/appsettings.json

@@ -0,0 +1,12 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*",
+  "WeightedRandom": {
+    "Weights": [ 5, 4, 3, 2, 1 ]
+  }
+}

Api.Gateway/ocelot.json

@@ -0,0 +1,38 @@
+{
+  "Routes": [
+    {
+      "UpstreamPathTemplate": "/course",
+      "UpstreamHttpMethod": [ "GET" ],
+      "DownstreamPathTemplate": "/api/course",
+      "DownstreamScheme": "https",
+      "LoadBalancerOptions": {
+        "Type": "WeightedRandom"
+      },
+      "DownstreamHostAndPorts": [
+        {
+          "Host": "localhost",
+          "Port": 8000
+        },
+        {
+          "Host": "localhost",
+          "Port": 8001
+        },
+        {
+          "Host": "localhost",
+          "Port": 8002
+        },
+        {
+          "Host": "localhost",
+          "Port": 8003
+        },
+        {
+          "Host": "localhost",
+          "Port": 8004
+        }
+      ]
+    }
+  ],
+  "GlobalConfiguration": {
+    "BaseUrl": "https://localhost:7186"
+  }
+}

Client.Wasm/Components/StudentCard.razor

@@ -4,10 +4,10 @@
     </CardHeader>
     <CardBody>
         <UnorderedList Unstyled>
-            <UnorderedListItem>Номер <Strong>№X "Название лабораторной"</Strong></UnorderedListItem>
-            <UnorderedListItem>Вариант <Strong>№Х "Название варианта"</Strong></UnorderedListItem>
-            <UnorderedListItem>Выполнена <Strong>Фамилией Именем 65ХХ</Strong> </UnorderedListItem>
-            <UnorderedListItem><Link To="https://puginarug.com/">Ссылка на форк</Link></UnorderedListItem>
+            <UnorderedListItem>Номер <Strong>№2 Балансировка нагрузки</Strong></UnorderedListItem>
+            <UnorderedListItem>Вариант <Strong>№50 "Учебный курс"</Strong></UnorderedListItem>
+            <UnorderedListItem>Выполнена <Strong>Сахаровой Дарьей 6513</Strong> </UnorderedListItem>
+            <UnorderedListItem><Link To="https://github.com/daryaskhrv/cloud-development">Ссылка на форк</Link></UnorderedListItem>
         </UnorderedList>
     </CardBody>
 </Card>

Client.Wasm/Properties/launchSettings.json

@@ -12,7 +12,7 @@
     "http": {
       "commandName": "Project",
       "dotnetRunMessages": true,
-      "launchBrowser": true,
+      "launchBrowser": false,
       "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
       "applicationUrl": "http://localhost:5127",
       "environmentVariables": {
@@ -22,7 +22,7 @@
     "https": {
       "commandName": "Project",
       "dotnetRunMessages": true,
-      "launchBrowser": true,
+      "launchBrowser": false,
       "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
       "applicationUrl": "https://localhost:7282;http://localhost:5127",
       "environmentVariables": {
@@ -31,7 +31,7 @@
     },
     "IIS Express": {
       "commandName": "IISExpress",
-      "launchBrowser": true,
+      "launchBrowser": false,
       "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
       "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"

Client.Wasm/wwwroot/appsettings.json

@@ -6,5 +6,5 @@
     }
   },
   "AllowedHosts": "*",
-  "BaseAddress": ""
+  "BaseAddress": "https://localhost:7186/course"
 }

CloudDevelopment.sln

@@ -1,10 +1,20 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 17
-VisualStudioVersion = 17.14.36811.4
+# Visual Studio Version 18
+VisualStudioVersion = 18.3.11505.172
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Client.Wasm", "Client.Wasm\Client.Wasm.csproj", "{AE7EEA74-2FE0-136F-D797-854FD87E022A}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CourseApp.Domain", "CourseApp.Domain\CourseApp.Domain.csproj", "{8DB96A31-4C80-448B-8E97-33930E7DD01C}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CourseApp.Api", "CourseApp.Api\CourseApp.Api.csproj", "{3E70AD66-1A84-425D-8EAA-23B820F3A292}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CourseApp.ServiceDefaults", "CourseApp.ServiceDefaults\CourseApp.ServiceDefaults.csproj", "{FA3F9ED2-E039-4168-AA5E-1E49E771AD99}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CourseApp.AppHost", "CourseApp.AppHost\CourseApp.AppHost.csproj", "{8874AAD8-BCC8-4E48-B7AB-C39E7B5F0F53}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Api.Gateway", "Api.Gateway\Api.Gateway.csproj", "{C99E72F4-9BA7-7D56-C88E-FB28534EFCB6}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +25,26 @@ Global
 		{AE7EEA74-2FE0-136F-D797-854FD87E022A}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{AE7EEA74-2FE0-136F-D797-854FD87E022A}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{AE7EEA74-2FE0-136F-D797-854FD87E022A}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8DB96A31-4C80-448B-8E97-33930E7DD01C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8DB96A31-4C80-448B-8E97-33930E7DD01C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8DB96A31-4C80-448B-8E97-33930E7DD01C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8DB96A31-4C80-448B-8E97-33930E7DD01C}.Release|Any CPU.Build.0 = Release|Any CPU
+		{3E70AD66-1A84-425D-8EAA-23B820F3A292}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3E70AD66-1A84-425D-8EAA-23B820F3A292}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3E70AD66-1A84-425D-8EAA-23B820F3A292}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3E70AD66-1A84-425D-8EAA-23B820F3A292}.Release|Any CPU.Build.0 = Release|Any CPU
+		{FA3F9ED2-E039-4168-AA5E-1E49E771AD99}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FA3F9ED2-E039-4168-AA5E-1E49E771AD99}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FA3F9ED2-E039-4168-AA5E-1E49E771AD99}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FA3F9ED2-E039-4168-AA5E-1E49E771AD99}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8874AAD8-BCC8-4E48-B7AB-C39E7B5F0F53}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8874AAD8-BCC8-4E48-B7AB-C39E7B5F0F53}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8874AAD8-BCC8-4E48-B7AB-C39E7B5F0F53}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8874AAD8-BCC8-4E48-B7AB-C39E7B5F0F53}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C99E72F4-9BA7-7D56-C88E-FB28534EFCB6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C99E72F4-9BA7-7D56-C88E-FB28534EFCB6}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C99E72F4-9BA7-7D56-C88E-FB28534EFCB6}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C99E72F4-9BA7-7D56-C88E-FB28534EFCB6}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

CourseApp.Api/Controllers/CourseController.cs

@@ -0,0 +1,22 @@
+using CourseApp.Api.Services;
+using CourseApp.Domain.Entity;
+using Microsoft.AspNetCore.Mvc;
+
+namespace CourseApp.Api.Controllers;
+
+[ApiController]
+[Route("api/[controller]")] 
+public class CourseController(CourseService _courseService) : ControllerBase
+{
+    /// <summary>
+    /// Получить курс по идентификатору
+    /// </summary>
+    /// <param name="id">Идентификатор курса</param>
+    /// <returns>Информация о курсе</returns>
+    [HttpGet] 
+    public async Task<ActionResult<Course>> Get(int id)
+    {
+        var course = await _courseService.GetCourseAsync(id);
+        return Ok(course);
+    }
+}

CourseApp.Api/CourseApp.Api.csproj

@@ -0,0 +1,20 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Aspire.StackExchange.Redis.DistributedCaching" Version="13.1.1" />
+    <PackageReference Include="Bogus" Version="35.6.5" />
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.6.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\CourseApp.Domain\CourseApp.Domain.csproj" />
+    <ProjectReference Include="..\CourseApp.ServiceDefaults\CourseApp.ServiceDefaults.csproj" />
+  </ItemGroup>
+
+</Project>

CourseApp.Api/Program.cs

@@ -0,0 +1,28 @@
+using CourseApp.Api.Services;
+using CourseApp.ServiceDefaults;
+
+var builder = WebApplication.CreateBuilder(args);
+
+builder.AddServiceDefaults();
+builder.AddRedisDistributedCache("redis");
+
+builder.Services.AddControllers();
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
+builder.Services.AddSingleton<CourseGenerator>();
+builder.Services.AddScoped<CourseService>();
+
+var app = builder.Build();
+
+if (app.Environment.IsDevelopment())
+{
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
+
+app.MapDefaultEndpoints();
+app.UseHttpsRedirection();
+app.UseAuthorization();
+app.MapControllers();
+app.Run();