[Request] Check For Hybrid Torrent Support

[zero77]

Can you please check for trackers that support hybrid torrent and list them.
My python knowledge is basic but you may be able to do something like this.

from tornado.httpclient import AsyncHTTPClient, HTTPRequest
import bencodepy
import binascii
import urllib.parse
import asyncio

async def check_bep34_support(tracker_url, info_hash_hex):
    info_hash_bytes = binascii.unhexlify(info_hash_hex)
    encoded_info_hash = urllib.parse.quote(info_hash_bytes)

    announce_url = (
        f"{tracker_url}?info_hash={encoded_info_hash}"
        "&peer_id=-PC0001-123456789012"
        "&port=6881"
        "&uploaded=0"
        "&downloaded=0"
        "&left=0"
        "&event=started"
    )

    http_client = AsyncHTTPClient()
    try:
        response = await http_client.fetch(announce_url)
        decoded = bencodepy.decode(response.body)
        decoded_str_keys = {k.decode('utf-8'): v for k, v in decoded.items()}

        if 'extmap' in decoded_str_keys:
            extmap = decoded_str_keys['extmap']
            extmap_str_keys = {k.decode('utf-8'): v for k, v in extmap.items()}
            print("Tracker supports the following extensions:")
            for ext_name, version in extmap_str_keys.items():
                print(f"  {ext_name}: version {version}")

            if 'hybrid' in extmap_str_keys or 'ut_hybrid' in extmap_str_keys:
                print("Tracker supports hybrid torrents (BEP 34).")
                return True
            else:
                print("Tracker does NOT explicitly support hybrid torrents.")
                return False
        else:
            print("Tracker does not provide an extension map (no BEP 34 support).")
            return False

    except Exception as e:
        print(f"Error contacting tracker: {e}")
        return False

if __name__ == "__main__":
    import asyncio
    tracker = "http://tracker.example.com:6969/announce"
    info_hash = "0123456789abcdef0123456789abcdef01234567"

    asyncio.run(check_bep34_support(tracker, info_hash))

[Dahrkael]

where does this 'extmap' thing comes from? is the first time i see it and theres no mention anywhere in the BEPs

[zero77]

@Dahrkael
"extension map" is a field in the tracker response that lists which BitTorrent protocol extensions the tracker supports.
My python is not great and i reuse different code i found.
There may be a better way to do this and if you know one can you open a PR