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Apr 12, 2023

How to implement HTTP/3 in your ASP.NET Core application

Author:
Jaimin Soni
Source:
Views:
2828

HTTP/3 is the latest version of the HTTP protocol, built on top of the QUIC transport protocol. It offers several advantages over its predecessors, including faster and more reliable connections, improved security, and reduced latency. In this article, we will explore how to implement HTTP/3 in your ASP.NET Core application.

HTTP/3

Step 1: Install the Microsoft.AspNetCore.Server.Kestrel.Https NuGet package

To use HTTP/3 in your ASP.NET Core application, you need to install the Microsoft.AspNetCore.Server.Kestrel.Https NuGet package. This package provides the necessary classes and methods to support HTTP/3.

Open the NuGet Package Manager Console and enter the following command:

Install-Package Microsoft.AspNetCore.Server.Kestrel.Https -Version 5.0.0

Step 2: Configure Kestrel to use HTTP/3

Kestrel is the default web server in ASP.NET Core. To enable HTTP/3, you need to modify your application’s Startup.cs file.

First, add the following using statement at the top of the file:

using Microsoft.AspNetCore.Server.Kestrel.Https;

Next, add the following code inside the ConfigureWebHost method:

webBuilder.ConfigureKestrel(options =>
{
    options.Listen(IPAddress.Any, 443, listenOptions =>
    {
        listenOptions.UseHttps(httpsOptions =>
        {
            httpsOptions.HttpProtocols = HttpProtocols.Http3;
        });
    });
});

This code tells Kestrel to listen on all IP addresses on port 443 (the default HTTPS port) and to use HTTP/3.

Step 3: Test your application

Once you have configured your application to use HTTP/3, you can test it using a web browser that supports the protocol, such as Chrome or Firefox.

Open your application in the browser and look for the HTTP/3 indicator in the address bar. If everything is configured correctly, you should see the HTTP/3 indicator.

Step 4: Troubleshooting

If you encounter any issues with HTTP/3, there are several things you can try:

Make sure you are using a browser that supports HTTP/3, such as Chrome or Firefox.
Check your Kestrel configuration to ensure that HTTP/3 is enabled.
Verify that your network and firewall settings allow HTTP/3 traffic.
Review the Microsoft.AspNetCore.Server.Kestrel.Https documentation for troubleshooting tips.

Conclusion

HTTP/3 is a powerful new protocol that offers several advantages over its predecessors. By following the steps outlined in this article, you can enable HTTP/3 in your ASP.NET Core application and take advantage of its benefits.

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