#!/usr/bin/env python

# encoding: utf-8

#

# Copyright (c) 2010 Doug Hellmann. All rights reserved.

#

"""Server half of echo example, using Unix domain sockets

"""

#end_pymotw_header

import socket

import sys

import os

server_address = './uds_socket'

# Make sure the socket does not already exist

try:

os.unlink(server_address)

except OSError:

if os.path.exists(server_address):

raise

# Create a UDS socket

sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)

# Bind the socket to the address

print >>sys.stderr, 'starting up on %s' % server_address

sock.bind(server_address)

# Listen for incoming connections

sock.listen(1)

while True:

# Wait for a connection

print >>sys.stderr, 'waiting for a connection'

connection, client_address = sock.accept()

try:

print >>sys.stderr, 'connection from', client_address

# Receive the data in small chunks and retransmit it

while True:

data = connection.recv(16)

print >>sys.stderr, 'received "%s"' % data

if data:

print >>sys.stderr, 'sending data back to the client'

connection.sendall(data)

else:

print >>sys.stderr, 'no data from', client_address

break

finally:

# Clean up the connection

connection.close()