https://github.com/ionelmc/python-cogen
Automatically exported from https://code.google.com/p/cogen
https://github.com/ionelmc/python-cogen
Last synced: 6 months ago
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Automatically exported from https://code.google.com/p/cogen
- Host: GitHub
- URL: https://github.com/ionelmc/python-cogen
- Owner: ionelmc
- License: mit
- Created: 2015-03-19T18:19:30.000Z (over 10 years ago)
- Default Branch: master
- Last Pushed: 2015-03-19T18:28:30.000Z (over 10 years ago)
- Last Synced: 2025-03-25T06:41:38.531Z (6 months ago)
- Language: Python
- Homepage:
- Size: 2.31 MB
- Stars: 6
- Watchers: 2
- Forks: 0
- Open Issues: 7
-
Metadata Files:
- Readme: README.txt
- License: LICENSE.txt
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README
Overview
--------
This is a library for network oriented, coroutine based programming.
*cogen*'s goal is to enable writing code in a seemingly synchronous and easy
manner in the form of generators that yield calls and receive the result
from that yield. These calls translate to asynchronous and fast os calls
in *cogen*'s internals.
Notable features
================
* a WSGI server, HTTP1.1 compliant, with asynchronous extensions
* epoll, kqueue, select, i/o completion ports, sendfile behind the scenes
* a couple of useful classes for putting the coroutine to sleep, wait for
signals, queues, timeouts etc.
Quick introduction
==================
A coroutine is just a generator wrapped in a helper class:
::
from cogen.core.coroutines import coroutine
@coroutine
def mycoro(bla):
result = yield
result = yield
* the `operation` instructs the scheduler what to do with the coroutine:
suspend it till something happens, add another coro in the scheduler, raise
a event and so on.
* if a `operation` has a result associated then the yield will return that
result (eg. a string or a (connection, address) tuple) otherwise it will
return the operation instance.
Echo server example
'''''''''''''''''''
::
from cogen.core import sockets
from cogen.core import schedulers
from cogen.core.coroutines import coroutine
@coroutine
def server():
srv = sockets.Socket()
print type(srv)
srv.bind(('localhost',777))
srv.listen(10)
while 1:
print "Listening..."
conn, addr = yield srv.accept()
print "Connection from %s:%s" % addr
m.add(handler, args=(conn, addr))
@coroutine
def handler(sock, addr):
yield sock.write("WELCOME TO ECHO SERVER !\r\n")
while 1:
line = yield sock.readline(8192)
if line.strip() == 'exit':
yield sock.write("GOOD BYE")
sock.close()
return
yield sock.write(line)
m = schedulers.Scheduler()
m.add(server)
m.run()
Documentation
=============
http://cogen.googlecode.com/svn/trunk/docs/build/index.html
Development
============
Takes place at: http://code.google.com/p/cogen/
Grab the latest and greatest from `trunk `_ with::
easy_install cogen==dev