Client/Server application using Python Socket API

client.py

# -*- coding: utf-8 -*-
import socket
from utils import readlines
"""
Client.
"""

# Création de la socket TCP
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# On se connecte sur le port 8080
server_address = ('localhost', 8084)
print('connecting to %s port %s' % server_address)
sock.connect(server_address)

try:
    # Send data
    message = b'Bonjour\n'
    print('sending "%s"' % message)
    sock.sendall(message)

    # Receive data
    for line in readlines(sock):
        print(line)
        if 'Au revoir' in line:
            break
finally:
    # Close the connection
    sock.close()

client_http.py

# -*- coding: utf-8 -*-
import socket
from utils import readlines
"""
Un simple client HTTP.
"""

# Création de la socket TCP
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# On se connecte sur le port 80 de google
server_address = ('www.google.com', 80)
print('connecting to %s port %s' % server_address)
sock.connect(server_address)

try:
    # Send HTTP request
    request = input('> ')
    print('sending "%s"' % request)
    sock.sendall((request + '\n\n').encode())

    # Receive the response
    for line in readlines(sock, delim='\r\n'):
        print(line)
        if line == '\r':  # caractère de fin de réponse HTTP
            break
finally:
    # Close the connection
    sock.close()

server.py

# -*- coding: utf-8 -*-
import socket
from utils import readlines
"""
Serveur qui renvoi (60 fois) l'heure au client.
"""

# Création de la socket TCP
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Bind de la socket au port 8080
server_address = ('localhost', 8084)
print('listen on %s port %s' % server_address)
sock.bind(server_address)

# Attente des connexions
sock.listen(1)

while True:
    print('waiting for a connection')
    connection, client_address = sock.accept()

    try:
        print('connection from', client_address)

        # Receive data
        for line in readlines(connection):
            print('receive "%s"' % line)
            if 'Bonjour' in line:
                # Envoi 60 fois l'heure au client
                for i in range(60):
                    print('sending data (%s)' % i)
                    connection.sendall(b'Test\n')
                # Say goodbye
                connection.sendall(b'Au revoir\n')
        break
    finally:
        # Close the connection
        connection.close()

utils.py

# -*- coding: utf-8 -*-
"""
Some useful function.
"""


def readlines(sock, buffer_size=2048, delim='\n'):
    """
    Read data from socket until connection is closed,
    and supply a generator interface.
    """
    buf = ''
    data = True
    while data:
        data = sock.recv(buffer_size)
        buf += data.decode()

        while buf.find(delim) != -1:
            line, buf = buf.split('\n', 1)
            yield line
    return