# simple illustration client/server pair; client program sends a string
# to server, which echoes it back to the client (in multiple copies),
# and the latter prints to the screen
# this is the server
import socket
import sys
# create a socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# associate the socket with a port
host = '' # can leave this blank on the server side
port = int(sys.argv[1])
s.bind((host, port))
# accept "call" from client
s.listen(1)
conn, addr = s.accept()
print 'client is at', addr
# read string from client (assumed here to be so short that one call to
# recv() is enough), and make multiple copies (to show the need for the
# "while" loop on the client side)
data = conn.recv(1000000)
data = 10000 * data # concatenate data with itself 999 times
# wait for the go-ahead signal from the keyboard (to demonstrate that
# recv() at the client will block until server sends)
z = raw_input()
# now send
conn.send(data)
# close the connection
conn.close()