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9bc5891b4b
Mirror the ASGI strip-and-warn behavior (commits 2191832b, 41ec7527, 0d35d2ae) on the WSGI path. Previously gunicorn would forward an app-supplied Content-Length and body bytes for HEAD requests and 1xx/204/304 responses, violating RFC 9110 / RFC 9112. - Add _response_omits_body() and _response_forbids_content_length() helpers on Response. - After process_headers, strip Content-Length and clear response_length on 1xx/204 (RFC 9110 §6.4.2 forbids it). HEAD and 304 keep app-supplied Content-Length. - write() and sendfile() drop body bytes for no-body responses and log a single WARNING per request. - is_chunked() now also covers 1xx via _omits_body. Fixes #3413
Gunicorn
Gunicorn is maintained by volunteers. If it powers your production, please consider supporting us:
Gunicorn 'Green Unicorn' is a Python WSGI HTTP Server for UNIX. It's a pre-fork worker model ported from Ruby's Unicorn project. The Gunicorn server is broadly compatible with various web frameworks, simply implemented, light on server resource usage, and fairly speedy.
New in v25: Per-app worker allocation for dirty arbiters, HTTP/2 support (beta)!
Quick Start
pip install gunicorn
gunicorn myapp:app --workers 4
For ASGI applications (FastAPI, Starlette):
gunicorn myapp:app --worker-class asgi
Features
- WSGI support for Django, Flask, Pyramid, and any WSGI framework
- ASGI support for FastAPI, Starlette, Quart
- HTTP/2 support (beta) with multiplexed streams
- Dirty Arbiters (beta) for heavy workloads (ML models, long-running tasks)
- uWSGI binary protocol for nginx integration
- Multiple worker types: sync, gthread, gevent, asgi
- Graceful worker process management
- Compatible with Python 3.9+
Documentation
Full documentation at https://gunicorn.org
Community
- Report bugs on GitHub Issues
- Chat in #gunicorn on Libera.chat
- See CONTRIBUTING.md for contribution guidelines
Support
Powering Python apps since 2010. Support continued development.
Sponsors
License
Gunicorn is released under the MIT License. See the LICENSE file for details.