Add spartan proto

Protocols/SpartanProtoHandler.cs

@@ -0,0 +1,81 @@
+using System.Net.Sockets;
+using System.Text;
+using System.Web;
+
+namespace Shoko;
+
+[Protocol("spartan")]
+class SpartanProtoHandler : ProtoHandler
+{
+    public SpartanProtoHandler(Uri url)
+    {
+        URL = url;
+    }
+
+    public override void Load()
+    {
+        var file = URL.AbsolutePath;
+
+        if(!file.StartsWith("/")) file = "/"+file;
+
+        var data = URL.Query;
+        if(data.StartsWith("?")) data.Remove(0,1);
+
+        var query = Encoding.UTF8.GetBytes(data);
+
+        var uri = Encoding.UTF8.GetBytes($"{URL.Host} {HttpUtility.UrlDecode(file)} {query.Length}\r\n");
+
+        var tcp = new TcpClient(URL.Host, URL.Port < 0 ? 300 : URL.Port);
+
+        var stream = tcp.GetStream();
+        stream.Write(uri);
+        if(query.Length > 0)
+            stream.Write(query);
+
+        var reader = new StreamReader(stream);
+        var header = reader.ReadLine();
+
+        var meta = header.Split(" ", 2, StringSplitOptions.TrimEntries);
+        Status = meta[0];
+
+        MediaType = "text/plain";
+
+        if(Status.StartsWith('2'))
+        {
+            if(meta.Length > 1)
+            {
+                var dict = new Dictionary<string, string>();
+                var type = meta[1].Split(";", StringSplitOptions.TrimEntries).ToList();
+                MediaType = type[0];
+
+                foreach (var item in type)
+                {
+                    var val = item.Split("=", 2);
+                    dict[val[0]] = val.Length > 1 ? val[1] : "";
+                }
+
+                MediaTypeParams = dict;
+            }
+            Content = stream;
+        }
+        else
+        {
+            byte[] content = new byte[]{};
+            if(meta.Length > 1)
+            {
+                if(Status.StartsWith('3'))
+                {
+                    meta[1] = "=> "+meta[1];
+                    MediaType = "text/gemini";
+                }
+                content = Encoding.UTF8.GetBytes(meta[1]);
+            }
+            Content = new MemoryStream(content);
+        }
+        Loaded = true;
+    }
+
+    public override void Render()
+    {
+    }
+}