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H2O HTTP server library

Project description

The pyh2o module provides Python binding for the H2O HTTP server. Specifically, it provides high performance HTTP 1/2 and websocket server for Python.


pip install pyh2o

If binary distribution for your platform is not provided, you will need cmake>=2.8.11 to install.


Clone the repository, initialize submodules by git submodule update --init --recursive.

  • Build: python build
  • Test: python test
  • Clean: python clean

End to end test brings up a real server and make requests to it.


Below is an example of serving static content.

import h2o
import socket

class Handler(h2o.Handler):
    def on_req(self):
        self.res_status = 200
        self.send_inline(b'Hello, world!')
        return 0

config = h2o.Config()
host = config.add_host(b'default', 65535)

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, True)
sock.bind(('', 8888))

loop = h2o.Loop()
loop.start_accept(sock.fileno(), config)
while == 0:

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