socket programming

what is a socket

server side

import socket

import sys

host='localhost'

PORT=8000

S=socket.socket(socket.AF_INET, socket.SOCK_STREAM)

print('socket created')

try:

S.bind((host,PORT))

except socket.error as e:

print(e[1])

sys.exit()

print('socket in listen mode ')

S.listen()

print ('Socket now listening')

while 1:

conn, addr = S.accept()

print ('Connected with ' + addr[0] + ':' + str(addr[1]))

data=conn.recv(1024)

print(data)

conn.send(b'I received data')

pass

S.close()

client side

import socket

import sys

host='localhost'

PORT=8000

S=socket.socket(socket.AF_INET, socket.SOCK_STREAM)

print('socket created')

try:

S.connect((host,PORT))

except socket.error as e:

print(e[1])

sys.exit()

l=3

print('client connected')

S.send(b'sent to server')

print ('message sent')

data=S.recv(1024)

print(data)