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Waitress WSGI server

Project description

Waitress is meant to be a production-quality pure-Python WSGI server with very acceptable performance. It has no dependencies except ones which live in the Python standard library. It runs on CPython on Unix and Windows under Python 2.6+ and Python 3.2+. It is also known to run on PyPy 1.6.0+ on UNIX. It supports HTTP/1.0 and HTTP/1.1.

For more information, see the “docs” directory of the Waitress package or .

1.0a2 (2016-07-07)


  • Removed AI_ADDRCONFIG from the call to getaddrinfo, this resolves an issue whereby getaddrinfo wouldn’t return any addresses to bind to on hosts where there is no internet connection but localhost is requested to be bound to. See for more information.

1.0a1 (2016-06-24)


  • Python 2.6 is no longer supported.


  • Waitress is now able to listen on multiple sockets, including IPv4 and IPv6. Instead of passing in a host/port combination you now provide waitress with a space delineated list, and it will create as many sockets as required. Using the host/port combination is deprecated but will be supported for at least the next 5 minor releases.

    from waitress import serve
    serve(wsgiapp, listen=' [::]:9090 *:6543')


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