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aioquic

License Version Python versions Tests Coverage Documentation

What is aioquic?

aioquic is a library for the QUIC network protocol in Python. It features a minimal TLS 1.3 implementation, a QUIC stack and an HTTP/3 stack.

aioquic is used by Python opensource projects such as dnspython, hypercorn, mitmproxy and the Web Platform Tests cross-browser test suite. It has also been used extensively in research papers about QUIC.

To learn more about aioquic please read the documentation.

Why should I use aioquic?

aioquic has been designed to be embedded into Python client and server libraries wishing to support QUIC and / or HTTP/3. The goal is to provide a common codebase for Python libraries in the hope of avoiding duplicated effort.

Both the QUIC and the HTTP/3 APIs follow the "bring your own I/O" pattern, leaving actual I/O operations to the API user. This approach has a number of advantages including making the code testable and allowing integration with different concurrency models.

A lot of effort has gone into writing an extensive test suite for the aioquic code to ensure best-in-class code quality, and it is regularly tested for interoperability against other QUIC implementations.

Features

  • minimal TLS 1.3 implementation conforming with RFC 8446
  • QUIC stack conforming with RFC 9000 (QUIC v1) and RFC 9369 (QUIC v2)
    • IPv4 and IPv6 support
    • connection migration and NAT rebinding
    • logging TLS traffic secrets
    • logging QUIC events in QLOG format
    • version negotiation conforming with RFC 9368
  • HTTP/3 stack conforming with RFC 9114
    • server push support
    • WebSocket bootstrapping conforming with RFC 9220
    • datagram support conforming with RFC 9297

Installing

The easiest way to install aioquic is to run:

pip install aioquic

Building from source

If there are no wheels for your system or if you wish to build aioquic from source you will need the OpenSSL development headers.

Linux

On Debian/Ubuntu run:

sudo apt install libssl-dev python3-dev

On Alpine Linux run:

sudo apk add openssl-dev python3-dev bsd-compat-headers libffi-dev

OS X

On OS X run:

brew install openssl

You will need to set some environment variables to link against OpenSSL:

export CFLAGS=-I$(brew --prefix openssl)/include
export LDFLAGS=-L$(brew --prefix openssl)/lib

Windows

On Windows the easiest way to install OpenSSL is to use Chocolatey.

choco install openssl

You will need to set some environment variables to link against OpenSSL:

$Env:INCLUDE = "C:\Progra~1\OpenSSL\include"
$Env:LIB = "C:\Progra~1\OpenSSL\lib"

Running the examples

aioquic comes with a number of examples illustrating various QUIC usecases.

You can browse these examples here: https://github.com/aiortc/aioquic/tree/main/examples

License

aioquic is released under the BSD license.