Add project files.

.dockerignore

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+**/.classpath
+**/.dockerignore
+**/.env
+**/.git
+**/.gitignore
+**/.project
+**/.settings
+**/.toolstarget
+**/.vs
+**/.vscode
+**/*.*proj.user
+**/*.dbmdl
+**/*.jfm
+**/azds.yaml
+**/bin
+**/charts
+**/docker-compose*
+**/Dockerfile*
+**/node_modules
+**/npm-debug.log
+**/obj
+**/secrets.dev.yaml
+**/values.dev.yaml
+LICENSE
+README.md
+!**/.gitignore
+!.git/HEAD
+!.git/config
+!.git/packed-refs
+!.git/refs/heads/**

Controllers/OembedController.cs

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+using Microsoft.AspNetCore.Mvc;
+using System.Xml.Linq;
+
+namespace OembedTests.Controllers
+{
+    [Route("/oembed")]
+    [ApiController]
+    public class OembedController : ControllerBase
+    {
+        [HttpGet]
+        public async Task<IActionResult> GetOembed([FromQuery]string url, [FromQuery] string? format = "json")
+        {
+            var userName = url.Replace("https://oembed-test.yawaflua.ru/pay/", "");
+            var response = $@"{{
+	""version"": ""1.0"",
+	""type"": ""link"",
+	""provider_name"": ""SP-Donate"",
+	""provider_url"": ""https://sp-donate.ru/"",
+	""title"": ""Donate to {userName} right now!"",
+	""thumbnail_url"": ""https://avatar.spworlds.ru/front/240/{userName}""
+	}}";
+            return Ok(response);
+        }
+    }
+}

Controllers/WeatherForecastController.cs

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+using Microsoft.AspNetCore.Mvc;
+
+namespace OembedTests.Controllers
+{
+    [ApiController]
+    [Route("pay")]
+    public class WeatherForecastController : ControllerBase
+    {
+        
+        [HttpGet("/{userName}")]
+        public async Task<IActionResult> Get(string userName)
+        {
+            return Ok(userName);
+        }
+    }
+}

Dockerfile

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+#See https://aka.ms/customizecontainer to learn how to customize your debug container and how Visual Studio uses this Dockerfile to build your images for faster debugging.
+
+FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
+USER app
+WORKDIR /app
+EXPOSE 8080
+EXPOSE 8081
+
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+ARG BUILD_CONFIGURATION=Release
+WORKDIR /src
+COPY ["OembedTests.csproj", "."]
+RUN dotnet restore "./OembedTests.csproj"
+COPY . .
+WORKDIR "/src/."
+RUN dotnet build "./OembedTests.csproj" -c $BUILD_CONFIGURATION -o /app/build
+
+FROM build AS publish
+ARG BUILD_CONFIGURATION=Release
+RUN dotnet publish "./OembedTests.csproj" -c $BUILD_CONFIGURATION -o /app/publish /p:UseAppHost=false
+
+FROM base AS final
+WORKDIR /app
+COPY --from=publish /app/publish .
+ENTRYPOINT ["dotnet", "OembedTests.dll"]

OembedTests.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <UserSecretsId>5a8aa1d4-191d-41df-a985-bd3376a38224</UserSecretsId>
+    <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
+    <DockerfileContext>.</DockerfileContext>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.19.6" />
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
+  </ItemGroup>
+
+</Project>

OembedTests.http

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+@OembedTests_HostAddress = http://localhost:5052
+
+GET {{OembedTests_HostAddress}}/weatherforecast/
+Accept: application/json
+
+###

OembedTests.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.9.34728.123
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OembedTests", "OembedTests.csproj", "{4E788BB3-1E69-4EA5-A4C3-BF89F97CACED}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{4E788BB3-1E69-4EA5-A4C3-BF89F97CACED}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4E788BB3-1E69-4EA5-A4C3-BF89F97CACED}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4E788BB3-1E69-4EA5-A4C3-BF89F97CACED}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4E788BB3-1E69-4EA5-A4C3-BF89F97CACED}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {F81C49C6-5456-40F1-997C-812D773364B6}
+	EndGlobalSection
+EndGlobal

Program.cs

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+
+namespace OembedTests
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            var builder = WebApplication.CreateBuilder(args);
+
+            // Add services to the container.
+
+            builder.Services.AddControllers();
+            // Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
+            builder.Services.AddEndpointsApiExplorer();
+            builder.Services.AddSwaggerGen();
+
+            var app = builder.Build();
+
+            // Configure the HTTP request pipeline.
+            if (app.Environment.IsDevelopment())
+            {
+                app.UseSwagger();
+                app.UseSwaggerUI();
+            }
+
+            app.UseHttpsRedirection();
+
+            app.UseAuthorization();
+
+
+            app.MapControllers();
+
+            app.Run();
+        }
+    }
+}

Properties/launchSettings.json

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+{
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      },
+      "dotnetRunMessages": true,
+      "applicationUrl": "http://localhost:5052"
+    },
+    "https": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      },
+      "dotnetRunMessages": true,
+      "applicationUrl": "https://localhost:7250;http://localhost:5052"
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "Container (Dockerfile)": {
+      "commandName": "Docker",
+      "launchBrowser": true,
+      "launchUrl": "{Scheme}://{ServiceHost}:{ServicePort}/swagger",
+      "environmentVariables": {
+        "ASPNETCORE_HTTPS_PORTS": "8081",
+        "ASPNETCORE_HTTP_PORTS": "8080"
+      },
+      "publishAllPorts": true,
+      "useSSL": true
+    }
+  },
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:26517",
+      "sslPort": 44326
+    }
+  }
+}

WeatherForecast.cs

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+namespace OembedTests
+{
+    public class WeatherForecast
+    {
+        public DateOnly Date { get; set; }
+
+        public int TemperatureC { get; set; }
+
+        public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
+
+        public string? Summary { get; set; }
+    }
+}

appsettings.Development.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

appsettings.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*"
+}