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#!/usr/bin/env python
"""Simple server that listens on port 6000 and echos back every input to the client.
Connect to it with:
telnet localhost 6000
Terminate the connection by terminating telnet (typically Ctrl-] and then 'quit').
"""
from gevent.server import StreamServer
# this handler will be run for each incoming connection in a dedicated greenlet
def echo(socket, address):
print ('New connection from %s:%s' % address)
socket.sendall('Welcome to the echo server! Type quit to exit.\r\n')
# using a makefile because we want to use readline()
fileobj = socket.makefile()
while True:
line = fileobj.readline()
if not line:
print ("client disconnected")
break
if line.strip().lower() == 'quit':
print ("client quit")
break
fileobj.write(line)
fileobj.flush()
print ("echoed %r" % line)
if __name__ == '__main__':
# to make the server use SSL, pass certfile and keyfile arguments to the constructor
server = StreamServer(('0.0.0.0', 6000), echo)
# to start the server asynchronously, use its start() method;
# we use blocking serve_forever() here because we have no other jobs
print ('Starting echo server on port 6000')
server.serve_forever()
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