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. net 6 new feature, supporting http / 3 endpoint Publishing

2021-08-26 05:04:43 webmote33

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preface

Http3 The protocol is built on UDP On the basis of , Yes , It's amazing , Formerly known as the great God of instability UDP, Now assume the underlying protocol of reliable communication protocol . In order to eliminate UDP uncertainty , stay UDP The agreement above , Added QUIC agreement .

Use QUIC Agreement in place of TCP The agreement is about reliable 、 Part of flow control , So it makes HTTP3 It can reliably carry out communication transmission .

stay .net 6 Preview version of asp.net core On , Microsoft added a pair of HTTP/3 Support for , This is Web It brought a lot of improvement .HTTP3 Brings faster connection settings and improved performance on low-quality networks .

From this, we can also see that Microsoft is interested in .net 6 High hopes given .

Microsoft Now add a pair of HTTP/3 Support and for HTTP/3 To configure TLS (https) Support for .

1. HTTP/3 TLS To configure

Let's see how to use the following command in small MVC Configure... In the application HTTP/3:

dotnet new mvc -o Http3Tls -n Http3Tls
cd Http3Tls
code .
 Copy code 

This command creates a MVC Applications , Switch to the project folder and open VSCode.

We need to be in Program.cs Middle configuration HTTP/3, As shown in the following code :


public class Program
{
    public static void Main(string[] args)
    {
        CreateHostBuilder(args).Build().Run();
    }

    public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder
                    .ConfigureKestrel((context, options) =>
                    {
                        options.EnableAltSvc = true;
                        options.Listen(IPAddress.Any, 5001, listenOptions =>
                        {
							// Enables HTTP/3
                            listenOptions.Protocols = HttpProtocols.Http3;
                            // Adds a TLS certificate to the endpoint
                            listenOptions.UseHttps(httpsOptions =>
                            {
                                httpsOptions.ServerCertificate = LoadCertificate();
                            });
                        });
                    })
                    .UseStartup<Startup>();
            });
}
 Copy code 

Sign here EnableAltSvc Set a... For the browser Alt-Svc header .

To tell you that this is an existing HTTP/1 or HTTP/2 Alternative services . This needs to tell the browser , Alternative services - In this case it is HTTP/3 - Should be treated like existing services .

It needs a https Connect to ensure security and trust .

Use listenOptions.UseHttps To configure ssl Certificate .

Use listenOptions.Protocols = HttpProtocols.Http3; Activate Http3 service .

Yes , It's that simple , An adaptation http3 The service of the agreement has been set up .

2 http/3 Summary of advantages

because Http/3 agreement , be based on UDP, It avoids TCP、Http/1、HTTP/2 The classic question of , A safe, efficient and reliable HTTP Communication protocol .

with 0 RTT Establishing a connection 、 Smooth connection migration 、 Basically eliminated the team head blocking , And enhance the flow control and other characteristics , In the vast majority of scenarios, we get more than HTTP/2 Better results .

therefore Http /3 It must be http The future of the agreement .

3. Summary

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