What’s this

https://travis-ci.org/mopemope/meinheld.svg

This is a high performance python wsgi web server.

And Meinheld is a WSGI compliant web server. (PEP333 and PEP3333 supported)

You can also join us in meinheld mailing list.

Requirements

Meinheld requires Python 2.x >= 2.6 or Python 3.x >= 3.5 . and greenlet >= 0.4.5.

Meinheld supports Linux, FreeBSD, and macOS.

Installation

Install from pypi:

$ pip install -U meinheld

Install from source:

$ python setup.py install

Meinheld also supports working as a gunicorn worker.

To install gunicorn:

$ pip install -U gunicorn

Basic Usage

simple wsgi app:

from meinheld import server

def hello_world(environ, start_response):
    status = b'200 OK'
    res = b"Hello world!"
    response_headers = [('Content-type', 'text/plain'), ('Content-Length', str(len(res)))]
    start_response(status, response_headers)
    return [res]

server.listen(("0.0.0.0", 8000))
server.run(hello_world)

with gunicorn. user worker class “egg:meinheld#gunicorn_worker” or “meinheld.gmeinheld.MeinheldWorker”:

$ gunicorn --workers=2 --worker-class="egg:meinheld#gunicorn_worker" gunicorn_test:app

Continuation

NOTE: This feature is deprecated and will be removed in 2.0

Meinheld provides a simple continuation API (based on greenlet).

To enable continuations, use ContinuationMiddleware. get Continuation from wsgi environ.

Continuation objects have two very interesting methods, suspend and resume.

For example:

from meinheld import server
from meinheld import middleware

def app(environ, start_response):
    ...

    #get Continuation
    c = environ.get(middleware.CONTINUATION_KEY, None)

    ...

    if condtion:
        waiters.append(c)
        #suspend
        c.suspend()
    else:
        for c in waiters:
            # resume suspend function
            c.resume()

    ...


server.listen(("0.0.0.0", 8000))
server.run(middleware.ContinuationMiddleware(hello_world))

For more info see http://github.com/mopemope/meinheld/tree/master/example/chat/

Websocket

NOTE: This feature is deprecated and will be removed in 2.0

Meinheld support Websockets. use WebSocketMiddleware.

For example:

from flask import Flask, render_template, request
from meinheld import server, middleware

SECRET_KEY = 'development key'
DEBUG=True

app = Flask(__name__)
app.config.from_object(__name__)


participants = set()


@app.route('/')
def index():
    return render_template('websocket_chat.html')

@app.route('/chat')
def chat():
    print request.environ
    ws = request.environ.get('wsgi.websocket')
    participants.add(ws)
    try:
        while True:
            print "ws.wait()..."
            m = ws.wait()
            print "recv msg %s" % m
            if m is None:
                break
            for p in participants:
                print "send message %s" % m
                p.send(m)
    finally:
        participants.remove(ws)
    return ""


if __name__ == "__main__":
    server.listen(("0.0.0.0", 8000))
    server.run(middleware.WebSocketMiddleware(app))

Patching

NOTE: This feature is deprecated and will be removed in 2.0

Meinheld provides a few monkeypatches.

Socket

This patch replaces the standard socket module.

For Example:

from meinheld import patch
patch.patch_all()

For more info see http://github.com/mopemope/meinheld/tree/master/example/patch/

Performance

For parsing HTTP requests, Meinheld uses Ryan Dahl’s http-parser library.

(see https://github.com/joyent/http-parser)

It is built around the high performance event library picoev.

(see http://developer.cybozu.co.jp/kazuho/2009/08/picoev-a-tiny-e.html)

Sendfile

Meinheld uses sendfile(2), over wgsi.file_wrapper.

Metadata

Release files for meinheld 1.0.2

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for meinheld 1.0.2
File	Size	Uploaded
meinheld-1.0.2.tar.gz	83.1 kB	May 17, 2020	Details

Release files / meinheld-1.0.2.tar.gz

Download URL	meinheld-1.0.2.tar.gz
Size	83.1 kB
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SHA-256 checksum How to use checksums	`008c76937ac2117cc69e032dc69cea9f85fc605de9bac1417f447c41c16a56d6`
BLAKE2b-256 checksum How to use checksums	`a641f11e4dbfe35f251b1fe10cee5b186a4ac29de3e03fede010db40313d829e`
Upload date	May 17, 2020
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/3.1.1 pkginfo/1.5.0.1 requests/2.23.0 setuptools/46.3.1 requests-toolbelt/0.9.1 tqdm/4.42.1 CPython/3.8.2`