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|
#!/usr/bin/env python
"""
Node Server Example
This example demonstrates how to create a very simple node server
that supports bi-diractional messaging between server and connected
clients forming a cluster of nodes.
"""
from optparse import OptionParser
from os import getpid
from circuits import Component, Debugger
from circuits.node import Node
__version__ = '0.0.1'
USAGE = '%prog [options]'
VERSION = '%prog v' + __version__
def parse_options():
parser = OptionParser(usage=USAGE, version=VERSION)
parser.add_option(
'-b',
'--bind',
action='store',
type='string',
default='0.0.0.0:8000',
dest='bind',
help='Bind to address:[port]',
)
parser.add_option(
'-d',
'--debug',
action='store_true',
default=False,
dest='debug',
help='Enable debug mode',
)
opts, args = parser.parse_args()
return opts, args
class NodeServer(Component):
def init(self, args, opts):
"""
Initialize our ``ChatServer`` Component.
This uses the convenience ``init`` method which is called after the
component is proeprly constructed and initialized and passed the
same args and kwargs that were passed during construction.
"""
self.args = args
self.opts = opts
self.clients = {}
if opts.debug:
Debugger().register(self)
if ':' in opts.bind:
address, port = opts.bind.split(':')
port = int(port)
else:
address, port = opts.bind, 8000
Node(port=port, server_ip=address).register(self)
def connect(self, sock, host, port):
"""Connect Event -- Triggered for new connecting clients"""
self.clients[sock] = {
'host': sock,
'port': port,
}
def disconnect(self, sock):
"""Disconnect Event -- Triggered for disconnecting clients"""
if sock not in self.clients:
return
del self.clients[sock]
def ready(self, server, bind):
print('Ready! Listening on {}:{}'.format(*bind))
print('Waiting for remote events...')
def hello(self):
return f'Hello World! ({getpid():d})'
def main():
opts, args = parse_options()
# Configure and "run" the System.
NodeServer(args, opts).run()
if __name__ == '__main__':
main()
|
