Server fixes:
- Move H3Connection initialization to ProtocolNegotiated event (matches official aioquic pattern)
- Fix datagram routing to use session_id instead of flow_id
- Add max_datagram_frame_size=65536 to enable QUIC datagrams
- Fix send_datagram() to use keyword arguments
- Add certificate chain handling for Let's Encrypt
- Add no-cache headers to static server
Command-line improvements:
- Move settings from environment variables to argparse
- Add comprehensive CLI arguments with defaults
- Default mode=wt, cert=cert.pem, key=key.pem
Test clients:
- Add test_webtransport_client.py - Python WebTransport client that successfully connects
- Add test_http3.py - Basic HTTP/3 connectivity test
Client updates:
- Auto-configure server URL and certificate hash from /cert-hash.json
- Add ES6 module support
Status:
✅ Python WebTransport client works perfectly
✅ Server properly handles WebTransport connections and datagrams
❌ Chrome fails due to cached QUIC state (QUIC_IETF_GQUIC_ERROR_MISSING)
🔍 Firefox sends packets but fails differently - to be debugged next session
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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