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#!/usr/bin/env python3.3
"""Example echo server."""
# Stdlib imports.
import logging
import socket
import sys
# Local imports.
import scheduling
import sockets
def handler(conn, addr):
"""COROUTINE: Handle one connection."""
logging.info('Accepting connection from %r', addr)
trans = sockets.SocketTransport(conn)
rdr = sockets.BufferedReader(trans)
while True:
line = yield from rdr.readline()
logging.debug('Received: %r from %r', line, addr)
if not line:
break
yield from trans.send(line.upper())
logging.debug('Closing %r', addr)
trans.close()
def doit():
"""COROUTINE: Set the wheels in motion."""
# Set up listener.
listener = yield from sockets.create_listener('localhost', 1111,
af=socket.AF_INET,
backlog=100)
logging.info('Listening on %r', listener.sock.getsockname())
# Loop accepting connections.
while True:
conn, addr = yield from listener.accept()
t = scheduling.Task(handler(conn, addr))
def main():
# Initialize logging.
if '-d' in sys.argv:
level = logging.DEBUG
elif '-v' in sys.argv:
level = logging.INFO
elif '-q' in sys.argv:
level = logging.ERROR
else:
level = logging.WARN
logging.basicConfig(level=level)
# Run scheduler, starting it off with doit().
scheduling.run(doit())
if __name__ == '__main__':
main()
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