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#!/bin/python
# Ouroboros - Copyright (C) 2016 - 2020
#
# A simple echo application
#
# Dimitri Staessens <dimitri@ouroboros.rocks>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
# OF THE POSSIBILITY OF SUCH DAMAGE.
from ouroboros.event import *
import argparse
def client():
with flow_alloc("oecho") as f:
f.writeline("Hello, PyOuroboros!")
print(f.readline())
def server():
print("Starting the server.")
while True:
with flow_accept() as f:
print("New flow.")
fq = FEventQueue()
with FlowSet([f]) as fs:
fs.wait(fq)
f2, t = fq.next()
if t != FEventType.FlowPkt:
continue
line = f2.readline()
print("Message from client is " + line)
f2.writeline(line)
if __name__ == "__main__":
parser = argparse.ArgumentParser(description='A simple echo client/server')
parser.add_argument('-l', '--listen', help='run as a server', action='store_true')
args = parser.parse_args()
if args.listen is True:
server()
else:
client()
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