1-client.py

from socket import *

client = socket(AF_INET, SOCK_STREAM)

print('Socket Created')

2-client-error-handling.py

from socket import *
import sys

try:
    client = socket(AF_INET, SOCK_STREAM)
except error, msg:
    print('Failed to create socket, error code: {} {}'.format(msg[0], msg[1]))
    sys.exit()

print('Socket Created')

3-client-connect-server.py

from socket import *
import sys

try:
    client = socket(AF_INET, SOCK_STREAM)
except error, msg:
    print('Failed to create socket, error code: {} {}'.format(msg[0], msg[1]))
    sys.exit()

host = 'www.biblegateway.com'
port = 80

try:
    host_ip = gethostbyname(host)
except gaierror:
    print('Could not resolve hostname')
    sys.exit()

print('The IP of {} is {}'.format(host, host_ip))

client.connect((host_ip, port))

print('Connected to {} ({}) on port {}'.format(host, host_ip, port))

4-send-data.py

from socket import *
import sys

try:
    client = socket(AF_INET, SOCK_STREAM)
except error, msg:
    print('Failed to create socket, error code: {} {}'.format(msg[0], msg[1]))
    sys.exit()

host = 'www.biblegateway.com'
port = 80

try:
    host_ip = gethostbyname(host)
except gaierror:
    print('Could not resolve hostname')
    sys.exit()

print('The IP of {} is {}'.format(host, host_ip))

client.connect((host_ip, port))

print('Connected to {} ({}) on port {}'.format(host, host_ip, port))

message = 'GET / HTTP/1.1\r\n\r\n'

try:
    client.sendall(message)
except error:
    print('Send failed: {}'.format(error))
    sys.exit()

print('Message sent sucessfully')

5-receive-data.py

from socket import *
import sys

try:
    client = socket(AF_INET, SOCK_STREAM)
except error, msg:
    print('Failed to create socket, error code: {} {}'.format(msg[0], msg[1]))
    sys.exit()

host = 'www.biblegateway.com'
port = 80

try:
    host_ip = gethostbyname(host)
except gaierror:
    print('Could not resolve hostname')
    sys.exit()

print('The IP of {} is {}'.format(host, host_ip))

client.connect((host_ip, port))

print('Connected to {} ({}) on port {}'.format(host, host_ip, port))

message = 'GET / HTTP/2.0\r\n\r\n'

try:
    client.sendall(message)
except error:
    print('Send failed: {}'.format(error))
    sys.exit()

print('Message sent sucessfully')

reply = client.recv(4096)

print(reply)

client.close()

6-bind-socket.py

from socket import *
import sys

host = ''
port = 3983

server = socket(AF_INET, SOCK_STREAM)
print('Server created, listening on {}'.format(port))

try:
    server.bind((host, port))
except error, msg:
    print('Socket binding failed: {} {}'.format(msg[0], msg[1]))
    sys.exit()

print('Socket binding complete')

server.listen(10)
print('Socket is now listening')

connection, address = server.accept()

print('Connected with {} {}'.format(address[0], address[1]))

data = connection.recv(1024)
connection.sendall(data)
connection.close()
server.close()

7-live-server.py

from socket import *
import sys

host = ''
port = 3983

server = socket(AF_INET, SOCK_STREAM)
print('Server created, listening on {}'.format(port))

try:
    server.bind((host, port))
except error, msg:
    print('Socket binding failed: {} {}'.format(msg[0], msg[1]))
    sys.exit()

print('Socket binding complete')

server.listen(10)
print('Socket is now listening')

while 1:
    connection, address = server.accept()

    print('Connected with {} {}'.format(address[0], address[1]))

    data = connection.recv(1024)

    if not data:
        break

    connection.sendall('OK...{}'.format(data))

connection.close()
server.close()

8-threads.py

from socket import *
from thread import *

host = ''
port = 3983

s = socket(AF_INET, SOCK_STREAM)
s.bind((host, port))
s.listen(10)

def client_thread(c):
    c.send('Wecome to the server, send me something')

    while True:
        data = c.recv(1024)
        if not data:
            break
        c.sendall('OK...{}'.format(data))
    c.close()

while 1:
    conn, addr = s.accept()
    print('Connected with {}:{}'.format(addr[0], addr[1]))

    start_new_thread(client_thread, (conn,))

s.close()

9-client.sh

telnet localhost 3983

9-server-code.py

from socket import *
from thread import *

host = ''
port = 3983

s = socket(AF_INET, SOCK_STREAM)
s.bind((host, port))
s.listen(10)

clients = []

def client_thread(c):
    try:
        clients.append(c)
        c.send('Wecome to the server, send me something: ')

        while True:
            data = c.recv(1024)
            if not data:
                break
            
            if '!q' in data:
                c.close()
                for index, client in enumerate(clients):
                    if c == client:
                        del clients[index]
            
            if data.split(' ')[0] == '!sendall':
                for client in clients:
                    client.sendall('{}'.format(''.join(data.split(' ')[1:])))
            else:
                c.sendall('OK...{}'.format(data))
    except:
        print('Client disconnected')

while 1:
    conn, addr = s.accept()
    print('Connected with {}:{}'.format(addr[0], addr[1]))

    start_new_thread(client_thread, (conn,))

s.close()