qh3 · PyPI

An implementation of QUIC and HTTP/3

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Project description

What is qh3?

qh3 is a maintained fork of the awesome aioquic library. Important changes/improvements are:

Made abi3 compatible, no need to build the wheel all over again on each interpreter version.
Only one dependency left! Cryptography will remain as long as Python does not ship with proper QUIC implementation.
Mitigated deprecated match_hostname.
Mimic load_default_certs SSL context from native Python.
Remove the need for OpenSSL development headers.
Many, many more pre-built wheel for your convenience! Including PyPy 3.8 and 3.9 and musl linux distributions.

qh3 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.

QUIC was standardised in RFC 9000 and HTTP/3 in RFC 9114. qh3 is regularly tested for interoperability against other QUIC implementations.

To learn more about qh3 please read the documentation.

Why should I use qh3?

qh3 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.

This library is the lowest-level you can find on handling QUIC and HTTP/3. Here are higher libraries:

mid-way: urllib3.future
highest and easiest: niquests

Features

QUIC stack conforming with RFC 9000
HTTP/3 stack conforming with RFC 9114
minimal TLS 1.3 implementation conforming with RFC 8446
IPv4 and IPv6 support
connection migration and NAT rebinding
logging TLS traffic secrets
logging QUIC events in QLOG format
HTTP/3 server push support

Requirements

qh3 requires Python 3.7 or greater.

Running the examples

qh3 comes with a number of examples illustrating various QUIC use-cases.

You can browse these examples here: https://github.com/Ousret/qh3/tree/main/examples

License

qh3 is released under the BSD license.

Project details

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Release history Release notifications | RSS feed

1.6.0

Mar 1, 2026

1.5.6

Nov 9, 2025

1.5.5

Oct 5, 2025

1.5.4

Aug 11, 2025

1.5.3

Jun 16, 2025

1.5.2

Jun 2, 2025

1.5.1

May 2, 2025

1.5.0

Apr 20, 2025

1.4.5

Apr 17, 2025

1.4.4

Apr 11, 2025

1.4.3

Apr 7, 2025

1.4.2

Mar 6, 2025

1.4.1

Feb 5, 2025

1.4.0

Feb 5, 2025

1.3.2

Jan 21, 2025

1.3.1

Jan 15, 2025

1.3.0

Jan 1, 2025

1.2.1

Oct 15, 2024

1.2.0

Sep 28, 2024

1.1.0

Sep 20, 2024

1.0.9

Aug 17, 2024

1.0.8

Jun 13, 2024

1.0.7

May 8, 2024

1.0.6

May 6, 2024

1.0.5

May 4, 2024

1.0.4

Apr 24, 2024

1.0.3

Apr 20, 2024

1.0.2

Apr 20, 2024

1.0.1

Apr 19, 2024

1.0.0

Apr 18, 2024

0.15.1

Mar 21, 2024

0.15.0

Feb 1, 2024

This version

0.14.0

Nov 11, 2023

0.13.0

Oct 27, 2023

0.12.0

Oct 8, 2023

0.11.5

Sep 5, 2023

0.11.4

Sep 3, 2023

0.11.3

Jul 20, 2023

0.11.2

Jul 14, 2023

0.11.1

Jun 18, 2023

0.11.0

Jun 18, 2023

0.10.0

Jun 16, 2023

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qh3 0.14.0

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