Using Windows named pipes in #csharp

client.cs

using System.IO.Pipes;

var httpHandler = new SocketsHttpHandler
{
    ConnectCallback = async (ctx, ct) =>
    {
        var pipeClientStream = new NamedPipeClientStream(
            serverName: ".",
            pipeName: "my-test-pipe",
            PipeDirection.InOut,
            PipeOptions.Asynchronous);

        await pipeClientStream.ConnectAsync(ct);
        
        return pipeClientStream;
    }
};

// Create an HttpClient using the named pipe handler
var httpClient = new HttpClient(httpHandler)
{
    BaseAddress = new Uri("http://localhost");
};

var result = await httpClient.GetStringAsync("/test");
Console.WriteLine(result);

server.cs

var builder = WebApplication.CreateBuilder(args);

builder.WebHost.ConfigureKestrel(
    opts => opts.ListenNamedPipe("my-test-pipe"));

builder.WebHost.UseNamedPipes(opts =>
{ 
    // Bump the buffer sizes to 4MB (defaults to 1MB)
    opts.MaxWriteBufferSize = 4 * 1024 * 1024;
    opts.MaxReadBufferSize = 4 * 1024 * 1024;
});

var app = builder.Build();

app.MapGet("/test", () =>  "Hello world!");

app.Run();