Program.cs

/*
 * Copyright (c) 2019 Google LLC.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

usingCloudSql.Settings;
usingGoogle.Cloud.Diagnostics.AspNetCore3;
usingMicrosoft.AspNetCore;
usingMicrosoft.AspNetCore.Hosting;
usingMicrosoft.Extensions.Configuration;
usingMicrosoft.Extensions.Hosting;
usingSystem;
usingSystem.IO;

namespaceCloudSql
{
publicclassProgram
{
publicstaticAppSettingsAppSettings{get;privateset;}

publicstaticvoidMain(string[]args)
{
// Create Database table if it does not exist.
StartupExtensions.InitializeDatabase();
BuildWebHost(args).Build().Run();
}

publicstaticIWebHostBuilderBuildWebHost(string[]args)
{
ReadAppSettings();

returnWebHost.CreateDefaultBuilder(args)
.ConfigureServices(services =>
services.AddGoogleDiagnosticsForAspNetCore(
AppSettings.GoogleCloudSettings.ProjectId,
AppSettings.GoogleCloudSettings.ServiceName,
AppSettings.GoogleCloudSettings.Version))
.UseStartup<Startup>()
.UsePortEnvironmentVariable();
}

/// <summary>
/// Read application settings from appsettings.json. 
/// </summary>
privatestaticvoidReadAppSettings()
{
varconfig=newConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json",optional:false)
.Build();

// Read json config into AppSettings.
AppSettings=newAppSettings();
config.Bind(AppSettings);
}
}

staticclassProgramExtensions
{
// Google Cloud Run sets the PORT environment variable to tell this
// process which port to listen to.
publicstaticIWebHostBuilderUsePortEnvironmentVariable(
thisIWebHostBuilderbuilder)
{
stringport=Environment.GetEnvironmentVariable("PORT");
if(!string.IsNullOrEmpty(port))
{
builder.UseUrls($"http://0.0.0.0:{port}");
}
returnbuilder;
}
}
}