Python 3.5+ web server that's written to go fast
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README.rst

Sanic

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Sanic is a Flask-like Python 3.5+ web server that's written to go fast. It's based on the work done by the amazing folks at magicstack, and was inspired by this article.

On top of being Flask-like, Sanic supports async request handlers. This means you can use the new shiny async/await syntax from Python 3.5, making your code non-blocking and speedy.

Sanic is developed on GitHub. Contributions are welcome!

Benchmarks

All tests were run on an AWS medium instance running ubuntu, using 1 process. Each script delivered a small JSON response and was tested with wrk using 100 connections. Pypy was tested for Falcon and Flask but did not speed up requests.

Server Implementation Requests/sec Avg Latency
Sanic Python 3.5 + uvloop 33,342 2.96ms
Wheezy gunicorn + meinheld 20,244 4.94ms
Falcon gunicorn + meinheld 18,972 5.27ms
Bottle gunicorn + meinheld 13,596 7.36ms
Flask gunicorn + meinheld 4,988 20.08ms
Kyoukai Python 3.5 + uvloop 3,889 27.44ms
Aiohttp Python 3.5 + uvloop 2,979 33.42ms
Tornado Python 3.5 2,138 46.66ms

Hello World Example

from sanic import Sanic
from sanic.response import json


app = Sanic()


@app.route("/")
async def test(request):
    return json({"hello": "world"})

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=8000)

SSL Example

Optionally pass in an SSLContext:

import ssl
certificate = "/path/to/certificate"
keyfile = "/path/to/keyfile"
context = ssl.create_default_context(purpose=ssl.Purpose.CLIENT_AUTH)
context.load_cert_chain(certificate, keyfile=keyfile)

app.run(host="0.0.0.0", port=8443, ssl=context)

Installation

  • python -m pip install sanic

Documentation

Documentation can be found in the docs directory.

TODO

  • Streamed file processing
  • File output
  • Examples of integrations with 3rd-party modules
  • RESTful router

Limitations

  • No wheels for uvloop and httptools on Windows :(

Final Thoughts

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