Request API over unix socket using SocketsHttpHandler class

unix-socket-console-socket-http-handler-client.cs

using System.Net.Sockets;

const string BaseAddress = "http://localhost";
const string UnixSocketPath = "/tmp/foo.sock";

var httpHandler  = new SocketsHttpHandler
{
    ConnectCallback = async (context, token) =>
    {
        var socket = new Socket(AddressFamily.Unix, SocketType.Stream, ProtocolType.IP);
        var endpoint = new UnixDomainSocketEndPoint(UnixSocketPath);
        await socket.ConnectAsync(endpoint).ConfigureAwait(false);

        return new NetworkStream(socket, ownsSocket: false);
    }
};

var client = new HttpClient(httpHandler);
client.BaseAddress = new Uri(BaseAddress);

var response = await client.GetAsync("/").ConfigureAwait(false);
var content = await response.Content.ReadAsStringAsync().ConfigureAwait(false);

Console.WriteLine(content);