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Session0204 (#60)
* Started on samples * Completed initial demos and added reference links * Status of the sample projects after stream
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# Session 0204 - Introducing APIs
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## Agenda
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- New API project template
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- Simplest API with middleware
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- EVEN simpler API with middleware and C# 9 top-level programs
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- Model Binding
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- Return Objects
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- Content Formatting
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## References
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[https://docs.microsoft.com/en-us/aspnet/core/web-api/?view=aspnetcore-5.0](https://docs.microsoft.com/en-us/aspnet/core/web-api/?view=aspnetcore-5.0)
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**Formatters**
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[https://docs.microsoft.com/en-us/aspnet/core/web-api/advanced/custom-formatters?view=aspnetcore-5.0](https://docs.microsoft.com/en-us/aspnet/core/web-api/advanced/custom-formatters?view=aspnetcore-5.0)
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## Next Time
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- OpenAPI with Swashbuckle
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- gRPC
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{
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// Use IntelliSense to find out which attributes exist for C# debugging
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// Use hover for the description of the existing attributes
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// For further information visit https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md
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"version": "0.2.0",
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"configurations": [
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{
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"name": ".NET Core Launch (web)",
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"type": "coreclr",
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"request": "launch",
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"preLaunchTask": "build",
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// If you have changed target frameworks, make sure to update the program path.
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"program": "${workspaceFolder}/bin/Debug/net5.0/1-BareTemplate.dll",
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"args": [],
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"cwd": "${workspaceFolder}",
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"stopAtEntry": false,
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// Enable launching a web browser when ASP.NET Core starts. For more information: https://aka.ms/VSCode-CS-LaunchJson-WebBrowser
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"serverReadyAction": {
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"action": "openExternally",
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"pattern": "\\bNow listening on:\\s+(https?://\\S+)"
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},
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"env": {
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"ASPNETCORE_ENVIRONMENT": "Development"
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},
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"sourceFileMap": {
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"/Views": "${workspaceFolder}/Views"
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}
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},
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{
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"name": ".NET Core Attach",
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"type": "coreclr",
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"request": "attach",
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"processId": "${command:pickProcess}"
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}
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]
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}
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{
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"version": "2.0.0",
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"tasks": [
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{
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"label": "build",
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"command": "dotnet",
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"type": "process",
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"args": [
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"build",
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"${workspaceFolder}/1-BareTemplate.csproj",
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"/property:GenerateFullPaths=true",
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"/consoleloggerparameters:NoSummary"
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],
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"problemMatcher": "$msCompile"
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},
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{
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"label": "publish",
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"command": "dotnet",
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"type": "process",
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"args": [
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"publish",
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"${workspaceFolder}/1-BareTemplate.csproj",
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"/property:GenerateFullPaths=true",
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"/consoleloggerparameters:NoSummary"
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],
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"problemMatcher": "$msCompile"
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},
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{
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"label": "watch",
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"command": "dotnet",
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"type": "process",
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"args": [
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"watch",
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"run",
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"${workspaceFolder}/1-BareTemplate.csproj",
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"/property:GenerateFullPaths=true",
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"/consoleloggerparameters:NoSummary"
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],
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"problemMatcher": "$msCompile"
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}
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]
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}
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<Project Sdk="Microsoft.NET.Sdk.Web">
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<PropertyGroup>
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<TargetFramework>net5.0</TargetFramework>
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<RootNamespace>_1_BareTemplate</RootNamespace>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="5.0.1" NoWarn="NU1605" />
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<PackageReference Include="Microsoft.AspNetCore.Authentication.OpenIdConnect" Version="5.0.1" NoWarn="NU1605" />
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<PackageReference Include="Swashbuckle.AspNetCore" Version="5.6.3" />
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</ItemGroup>
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</Project>
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.Extensions.Logging;
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namespace _1_BareTemplate.Controllers
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{
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[ApiController]
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[Route("api/WeatherForecast")]
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public class FooController : ControllerBase
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{
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private static readonly string[] Summaries = new[]
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{
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"Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
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};
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private readonly ILogger<FooController> _logger;
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public FooController(ILogger<FooController> logger)
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{
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_logger = logger;
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}
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[HttpGet]
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public IEnumerable<WeatherForecast> Get()
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{
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var rng = new Random();
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return Enumerable.Range(1, 5).Select(index => new WeatherForecast
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{
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Date = DateTime.Now.AddDays(index),
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TemperatureC = rng.Next(-20, 55),
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Summary = Summaries[rng.Next(Summaries.Length)]
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})
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.ToArray();
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}
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}
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}
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore.Hosting;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Hosting;
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using Microsoft.Extensions.Logging;
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namespace _1_BareTemplate
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{
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public class Program
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{
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public static void Main(string[] args)
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{
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CreateHostBuilder(args).Build().Run();
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}
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public static IHostBuilder CreateHostBuilder(string[] args) =>
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Host.CreateDefaultBuilder(args)
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.ConfigureWebHostDefaults(webBuilder =>
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{
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webBuilder.UseStartup<Startup>();
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});
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}
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}
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{
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"$schema": "http://json.schemastore.org/launchsettings.json",
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"iisSettings": {
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"windowsAuthentication": false,
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"anonymousAuthentication": true,
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"iisExpress": {
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"applicationUrl": "http://localhost:65327",
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"sslPort": 44344
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}
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},
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"profiles": {
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"IIS Express": {
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"commandName": "IISExpress",
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"launchBrowser": true,
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"launchUrl": "swagger",
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"environmentVariables": {
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"ASPNETCORE_ENVIRONMENT": "Development"
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}
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},
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"_1_BareTemplate": {
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"commandName": "Project",
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"dotnetRunMessages": "true",
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"launchBrowser": true,
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"launchUrl": "swagger",
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"applicationUrl": "https://localhost:5001;http://localhost:5000",
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"environmentVariables": {
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"ASPNETCORE_ENVIRONMENT": "Development"
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}
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}
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}
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}
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore.Builder;
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using Microsoft.AspNetCore.Hosting;
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using Microsoft.AspNetCore.HttpsPolicy;
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Hosting;
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using Microsoft.Extensions.Logging;
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using Microsoft.OpenApi.Models;
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namespace _1_BareTemplate
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{
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public class Startup
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{
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public Startup(IConfiguration configuration)
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{
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Configuration = configuration;
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}
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public IConfiguration Configuration { get; }
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// This method gets called by the runtime. Use this method to add services to the container.
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public void ConfigureServices(IServiceCollection services)
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{
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services.AddControllers();
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services.AddSwaggerGen(c =>
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{
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c.SwaggerDoc("v1", new OpenApiInfo {
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Title = "_1_BareTemplate", Version = "v1"
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});
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});
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}
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// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
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public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
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{
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if (env.IsDevelopment())
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{
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app.UseDeveloperExceptionPage();
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app.UseSwagger();
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app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "_1_BareTemplate v1"));
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}
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app.UseHttpsRedirection();
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app.UseRouting();
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app.UseAuthorization();
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app.UseEndpoints(endpoints =>
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{
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endpoints.MapControllers();
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});
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}
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}
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}
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using System;
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namespace _1_BareTemplate
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{
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public class WeatherForecast
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{
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public DateTime Date { get; set; }
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public int TemperatureC { get; set; }
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public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
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public string Summary { get; set; }
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}
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}
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{
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"Logging": {
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"LogLevel": {
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"Default": "Information",
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"Microsoft": "Warning",
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"Microsoft.Hosting.Lifetime": "Information"
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}
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}
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}

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