shoko/Protocols/GopherProtoHandler.cs

using System.Net.Sockets;
using System.Text;
using System.Web;

namespace Shoko;

[Protocol("gopher")]
class GopherProtoHandler : ProtoHandler
{
    public GopherProtoHandler(Uri url)
    {
        URL = url;
    }

    public override async Task Load()
    {
        var type = "0";
        var file = URL.PathAndQuery;

        var paths = file.Split("/", StringSplitOptions.RemoveEmptyEntries).ToList();

        if(paths.Count > 0)
        {
            if(paths[0].Length == 1)
            {
                type = paths[0];
                paths.RemoveAt(0);
            }
            else
            {
                type = paths[0][0].ToString();
                paths[0] = paths[0][1..];
            }
        }
        else
            type = "1";
        
        switch(type)
        {
            case "0":
                MediaType = "text/plain";
                break;
            case "1": // menu
            case "3":
            case "7":
                MediaType = "text/gopher-menu";
                break;
            case "g":
                MediaType = "image/gif";
                break;
            case "p":
                MediaType = "image/png";
                break;
            case "I":
            case ":":
                MediaType = "image/*";
                break;
            case "h":
                MediaType = "text/html";
                break;
            default:
                MediaType = "application/octet-stream"; // TODO: mimeguesser?
                break;
        }

        var uri = Encoding.UTF8.GetBytes(HttpUtility.UrlDecode(string.Join("/", paths))+"\r\n");

        var tcp = new TcpClient(URL.Host, URL.Port < 0 ? 70 : URL.Port);

        var stream = tcp.GetStream();

        stream.Write(uri);

        Content = await Download(stream);
        OnLoaded();
    }
    public override void Render()
    {
    }
}