Пахомов Леонид Лаб. 2 Группа 6512

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="..\WarehouseApp\WarehouseApp.ServiceDefaults\WarehouseApp.ServiceDefaults.csproj" />
+  </ItemGroup>
+
+</Project>

Api.Gateway/Program.cs

@@ -0,0 +1,32 @@
+using Api.Gateway;
+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>()));
+
+var allowedOrigins = builder.Configuration
+    .GetSection("Cors:AllowedOrigins")
+    .Get<string[]>() ?? [];
+
+builder.Services.AddCors(options =>
+    options.AddDefaultPolicy(policy =>
+        policy.WithOrigins(allowedOrigins)
+              .WithMethods("GET")
+              .AllowAnyHeader()));
+
+var app = builder.Build();
+
+app.UseCors();
+
+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:48792",
+      "sslPort": 44345
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "http://localhost:5252",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "https://localhost:7032;http://localhost:5252",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

Api.Gateway/WeightedRandom.cs

@@ -0,0 +1,56 @@
+using Ocelot.LoadBalancer.Interfaces;
+using Ocelot.Responses;
+using Ocelot.Values;
+
+namespace Api.Gateway;
+
+/// <summary>
+/// Балансировщик нагрузки «Взвешенный случайный выбор» (Weighted Random).
+/// Каждой реплике присваивается целочисленный вес из секции <c>LoadBalancer:Weights</c>.
+/// При поступлении запроса реплика выбирается случайно — вероятность выбора пропорциональна весу
+/// (вес реплики / сумма всех весов).
+/// </summary>
+/// <param name="services">Делегат для получения списка доступных реплик сервиса.</param>
+/// <param name="configuration">
+/// Конфигурация приложения с секцией <c>LoadBalancer:Weights</c> —
+/// массив <c>int</c>, где индекс соответствует номеру реплики, а значение — относительному весу.
+/// </param>
+public class WeightedRandom(
+    Func<Task<List<Service>>> services,
+    IConfiguration configuration) : ILoadBalancer
+{
+    public string Type => nameof(WeightedRandom);
+
+    private readonly int[] _weights = configuration.GetSection("LoadBalancer:Weights").Get<int[]>() ?? [];
+
+    public async Task<Response<ServiceHostAndPort>> LeaseAsync(HttpContext context)
+    {
+        var pool = await services();
+
+        if (pool.Count == 0)
+            throw new InvalidOperationException("No available downstream services");
+
+        var total = 0;
+        for (var i = 0; i < pool.Count; i++)
+            total += Weight(i);
+
+        var value = Random.Shared.Next(total);
+
+        for (var i = 0; i < pool.Count; i++)
+        {
+            value -= Weight(i);
+            if (value < 0)
+                return new OkResponse<ServiceHostAndPort>(pool[i].HostAndPort);
+        }
+
+        return new OkResponse<ServiceHostAndPort>(pool[^1].HostAndPort);
+    }
+
+    public void Release(ServiceHostAndPort hostAndPort) { }
+
+    /// <summary>
+    /// Возвращает вес реплики по индексу.
+    /// Если вес не задан или не положителен — возвращает 1.
+    /// </summary>
+    private int Weight(int i) => i < _weights.Length && _weights[i] > 0 ? _weights[i] : 1;
+}

Api.Gateway/appsettings.Development.json

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

Api.Gateway/appsettings.json

@@ -0,0 +1,18 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "Cors": {
+    "AllowedOrigins": [
+      "http://localhost:5127",
+      "https://localhost:7282"
+    ]
+  },
+  "LoadBalancer": {
+    "Weights": [ 35, 25, 20, 12, 8 ]
+  },
+  "AllowedHosts": "*"
+}

Api.Gateway/ocelot.json

@@ -0,0 +1,20 @@
+{
+  "Routes": [
+    {
+      "DownstreamPathTemplate": "/api/warehouse-item",
+      "DownstreamScheme": "https",
+      "DownstreamHostAndPorts": [
+        { "Host": "localhost", "Port": 7250 },
+        { "Host": "localhost", "Port": 7251 },
+        { "Host": "localhost", "Port": 7252 },
+        { "Host": "localhost", "Port": 7253 },
+        { "Host": "localhost", "Port": 7254 }
+      ],
+      "UpstreamPathTemplate": "/warehouse-item",
+      "UpstreamHttpMethod": [ "GET" ],
+      "LoadBalancerOptions": {
+        "Type": "WeightedRandom"
+      }
+    }
+  ]
+}

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>№31 "Товар на складе"</Strong></UnorderedListItem>
+            <UnorderedListItem>Выполнил <Strong>Пахомов Леонид 6512</Strong> </UnorderedListItem>
+            <UnorderedListItem><Link To="https://github.com/Sonya-From-IBAS/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:7032/warehouse-item"
 }

CloudDevelopment.sln

@@ -5,6 +5,14 @@ VisualStudioVersion = 17.14.36811.4
 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}") = "WarehouseApp.AppHost", "WarehouseApp\WarehouseApp.AppHost\WarehouseApp.AppHost.csproj", "{62DA23FA-2BAF-4F9A-B719-B4EE06809BA0}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WarehouseApp.ServiceDefaults", "WarehouseApp\WarehouseApp.ServiceDefaults\WarehouseApp.ServiceDefaults.csproj", "{ADCEFD5A-DE46-3D8E-DD7F-B5FD83A993DF}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WarehouseApp.Api", "WarehouseApp.Api\WarehouseApp.Api.csproj", "{6D2468DE-58C5-E4A1-2839-0E91AF620D88}"
+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 +23,22 @@ 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
+		{62DA23FA-2BAF-4F9A-B719-B4EE06809BA0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{62DA23FA-2BAF-4F9A-B719-B4EE06809BA0}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{62DA23FA-2BAF-4F9A-B719-B4EE06809BA0}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{62DA23FA-2BAF-4F9A-B719-B4EE06809BA0}.Release|Any CPU.Build.0 = Release|Any CPU
+		{ADCEFD5A-DE46-3D8E-DD7F-B5FD83A993DF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{ADCEFD5A-DE46-3D8E-DD7F-B5FD83A993DF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{ADCEFD5A-DE46-3D8E-DD7F-B5FD83A993DF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{ADCEFD5A-DE46-3D8E-DD7F-B5FD83A993DF}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6D2468DE-58C5-E4A1-2839-0E91AF620D88}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6D2468DE-58C5-E4A1-2839-0E91AF620D88}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6D2468DE-58C5-E4A1-2839-0E91AF620D88}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6D2468DE-58C5-E4A1-2839-0E91AF620D88}.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