An asynchronous, event driver web framework for the Python programming language.
Project description
Pyjoyment
An asynchronous, event driver web framework for the Python programming language.
Pyjoyment provides own reactor which handles I/O and timer events in its own main event loop but it supports other loops, ie. libev, asyncio.
Pyjoyment uses intensively own event emmiter which should be familiar for Node.JS programmers.
It provides tool set for parsing and creating HTTP messages and HTML documents. It also supports WSGI interface.
Pyjoyment is compatible with Python 2.7+, Python 3.3+ and PyPy 2.4+. It doesn’t require any external libraries or compilers.
Pyjoyment is based on Mojolicious: a next generation web framework for the Perl programming language.
Status
Early developement stage. Implemented already:
WSGI adapter
HTTP standalone async-io server
WebSockets client and server
HTTP user agent with TLS/SSL support
JSON pointers implementation based on RFC6901
Embedded files loader
HTML/XML DOM parser with CSS selectors
URL parser with container classes for URL, path and querystring
Non-blocking TCP client and server
Simple logging object
Synchronizer and sequentializer of multiple events
Main event loop which handle IO and timer events
Event emitter with subscriptions
Low level event reactor based on select(2) and poll(2)
Convenient functions and classed for unicode and byte strings and lists
Lazy properties for objects
Test units with API based on Perl’s Test::More and TAP protocol
Examples
Web scraping
import Pyjo.UserAgent
from Pyjo.String.Unicode import u
tx = Pyjo.UserAgent.new().get('https://html.spec.whatwg.org')
for n in tx.res.dom('#named-character-references-table tbody > tr').each():
u(n.at('td > code').text + ' ' + n.children('td')[1].text).trim().say()URL manipulation
import Pyjo.URL
from Pyjo.String.Unicode import u
# 'ssh+git://git@github.com/dex4er/Pyjoyment.git'
url = Pyjo.URL.new('https://github.com/dex4er/Pyjoyment')
print(url.set(scheme='ssh+git', userinfo='git', path=u(url.path) + '.git'))
# 'http://metacpan.org/search?q=Mojo::URL&size=20'
print(Pyjo.URL.new('http://metacpan.org/search')
.set(query={'q': 'Mojo::URL', 'size': 20}))Non-blocking TCP client/server
import Pyjo.IOLoop
# Listen on port 3000
@Pyjo.IOLoop.server(port=3000)
def server(loop, stream, cid):
@stream.on
def read(stream, chunk):
# Process input chunk
print("Server: {0}".format(chunk.decode('utf-8')))
# Write response
stream.write(b"HTTP/1.1 200 OK\x0d\x0a\x0d\x0a")
# Disconnect client
stream.close_gracefully()
# Connect to port 3000
@Pyjo.IOLoop.client(port=3000)
def client(loop, err, stream):
@stream.on
def read(stream, chunk):
# Process input
print("Client: {0}".format(chunk.decode('utf-8')))
# Write request
stream.write(b"GET / HTTP/1.1\x0d\x0a\x0d\x0a")
# Add a timer
@Pyjo.IOLoop.timer(3)
def timeouter(loop):
print("Timeout")
# Shutdown server
loop.remove(server)
# Start event loop
Pyjo.IOLoop.start()Standalone HTTP server serving embedded template file
# -*- coding: utf-8 -*-
import Pyjo.Server.Daemon
import Pyjo.URL
from Pyjo.Loader import embedded_file
from Pyjo.Util import b, u
import sys
opts = dict([['address', '0.0.0.0'], ['port', 3000]] + list(map(lambda a: a.split('='), sys.argv[1:])))
listen = str(Pyjo.URL.new(scheme='http', host=opts['address'], port=opts['port']))
daemon = Pyjo.Server.Daemon.new(listen=[listen])
daemon.unsubscribe('request')
# Embedded template file
DATA = u(r'''
@@ index.html.tpl
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Pyjoyment</title>
</head>
<body>
<h1>♥ Pyjoyment ♥</h1>
<h2>This page is served by Pyjoyment framework.</h2>
<p>{method} request for {path}</p>
</body>
</html>
''')
@daemon.on
def request(daemon, tx):
# Request
method = tx.req.method
path = tx.req.url.path
# Template
template = embedded_file(sys.modules[__name__], 'index.html.tpl')
# Response
tx.res.code = 200
tx.res.headers.content_type = 'text/html; charset=utf-8'
tx.res.body = b(template.format(**locals()))
# Resume transaction
tx.resume()
daemon.run()Release history Release notifications | RSS feed
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