An async-native WebTransport stack for Python

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Overview

PyWebTransport implements the WebTransport protocol over QUIC and HTTP/3. It provides a deterministic state machine for streams and datagrams, alongside a high-level application framework designed for standards compliance and strict concurrency safety.

Features

• Sans-I/O Architecture: Powered by an ownership-driven Rust state machine decoupled from an autonomous threaded reactor via a lock-free IPC boundary.
• Transport Primitives: Full implementation of bidirectional streams, unidirectional streams, and unreliable datagrams.
• Structured Concurrency: Deterministic lifecycle management for connections and streams via asynchronous context managers.
• Zero-Copy I/O: End-to-end support for buffer protocols and memoryview to minimize data copying overhead.
• Application Framework: Declarative ServerApp featuring path-based routing and composable stateful middleware.

Interoperability

Infrastructure

• Public Instance: https://interop.wtransport.org, Native Dual-Stack
• Container Image: ghcr.io/wtransport/interop-server:latest, UDP Port 4433

Endpoints

• /echo: Bidirectional stream and datagram reflection.
• /stats: Current session statistics and negotiated parameters.
• /status: Global server health and aggregate metrics.
• /webtransport/devious-baton: Devious Baton protocol state transition validation.

API Reference

• Full Reference: Comprehensive documentation organized into the Application Framework, Transport Layer, and Shared Primitives.

Community

• GitHub: Source code and issue tracker.
• PyPI: Package distribution.

License

Distributed under the terms of the Apache License 2.0. See LICENSE for details.