在配置 Kestrel 和 UseHttps 时确定托管环境

Question

在下面的ASP.NET Core Main 方法中，如何确定托管环境，以便在HTTPS 的不同证书文件之间切换？

public sealed class Program
{
    public static void Main(string[] args)
    {
        new WebHostBuilder()
            .UseContentRoot(Directory.GetCurrentDirectory())
            .UseKestrel(
                options =>
                {
                    if ([Development Hosting Environment])
                    {
                        options.UseHttps("DevelopmentCertificate.pfx");
                    }
                    else
                    {
                        options.UseHttps("ProductionCertificate.pfx");
                    }
                })
            .UseIISIntegration()
            .UseStartup<Startup>()
            .Build()
            .Run();
    }
}

更新

我提出了以下GitHub issue。

Answer 1

我已经试过了，它似乎确实有效，但你可能不想仔细检查...

public class Program
{
    public static void Main(string[] args)
    {
        var config = new ConfigurationBuilder()
                        .AddEnvironmentVariables()
                        .Build();

        var pfx = config["ASPNETCORE_ENVIRONMENT"].Equals("Development", StringComparison.CurrentCultureIgnoreCase)
            ? "DevelopmentCertificate.pfx"
            : "ProductionCertificate.pfx";

        var host = new WebHostBuilder()
            .UseKestrel(options =>
            {
                options.UseHttps(pfx);
            })
            .UseContentRoot(Directory.GetCurrentDirectory())
            .UseIISIntegration()
            .UseStartup<Startup>()
            .Build();

        host.Run();
    }
}

Answer 2

事实证明，您可以使用 ConfigureServices 来获取 IHostingEnvironment，如下所示：

public sealed class Program
{
    public static void Main(string[] args)
    {
        IHostingEnvironment hostingEnvironment = null;
        new WebHostBuilder()
            .UseContentRoot(Directory.GetCurrentDirectory())
            .ConfigureServices(
                services =>
                {
                    hostingEnvironment = services
                        .Where(x => x.ServiceType == typeof(IHostingEnvironment))
                        .Select(x => (IHostingEnvironment)x.ImplementationInstance)
                        .First();
                })
            .UseKestrel(
                options =>
                {
                    if (hostingEnvironment.IsDevelopment())
                    {
                        // Use a self-signed certificate to enable 'dotnet run' to work in development.
                        options.UseHttps("DevelopmentCertificate.pfx", "password");
                    }
                })
            .UseIISIntegration()
            .UseStartup<Startup>()
            .Build()
            .Run();
    }
}