The webtransport-go from langhuihui

webtransport-go's Issues

Received datagrams have zero byte added to front?

Hi - I am using your example code (basically unchanged) together with https://googlechrome.github.io/samples/webtransport/client.html to connect and send a datagram. It works, but every message received by the server has a zero byte prefixed. For example, if I send a 5-byte datagram from the browser end ('HELLO'), the client apparently receives 6 bytes and your log prints:

ReceiveMessage:00 48 45 4c 4c 4f

Can you explain why this is happening? Thank you!

No method to stop the WebTransport server?

Hi - after starting the server by calling Run(), it appears there's no clean way to stop it, short of stopping the whole process. Can you add a Stop() method so we can cleanly stop a server and/or allow the object returned by NewWebTransportServer to be garbage collected?

My specific application here is the need to periodically change the PEM/KEY of the service while it's running.

Writes (both server->client and client->server) from unidirectional/bidirectional streams do not work

Use https://googlechrome.github.io/samples/webtransport/client.html
Connect to your example server
Enter 'XYZ123' in the 'Send data over WebTransport box', then press 'Open a bidirectional stream'

I expect to see: 'XYZ123' received by the server, and then echoed back to the client (via the s.Write(buf[:n]) line in your example)

What actually happens: the server receives nonsense

receive from Stream:40 41 00

and this is then echoed back to the client (which does successfully receive the same 'nonsense' string of 40 41 00). So the 'write' part is working OK, it is just the 'read' part which is broken.

Edited to add: note that if (instead of langhuihui/WebTransport-Go) I use Google's python3 demo server (https://raw.githubusercontent.com/GoogleChrome/samples/gh-pages/webtransport/webtransport_server.py), everything works fine.

Edit 2: here is the skeleton client I use to test things - this gives the same "nonsense" result as reported above:

<html>
<script>
  async function main() {
    let transport = new WebTransport("https://xxxxxx:4433/counter");
    await transport.ready;
    let stream = await transport.createBidirectionalStream();
    let encoder = new TextEncoder();
    let writer = stream.writable.getWriter();
    await writer.write(encoder.encode("XYZ123"));
    writer.close();
    console.log(await new Response(stream.readable).text());
  }

  main();
</script>
</html>

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webtransport-go's Issues

Received datagrams have zero byte added to front?

No method to stop the WebTransport server?

Writes (both server->client and client->server) from unidirectional/bidirectional streams do not work

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