Socket programming in Python - Transmission Control Protocol

Socket Programming TCP

Socket Programming for client-server communication using Transmission -Control-Protocol in Python.

TCP server:
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# Import socket library
import socket

# Create server
serverPort = 1200
ServerName = 'localhost'
ServerAddress = (ServerName, serverPort)

# Create server socket
serverSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Associate server port number with the socket
serverSocket.bind(ServerAddress)

# wait for some client to knock on the door
serverSocket.listen(1) # maximum number of queued connections (atleast 1)

print 'The server is ready to listen'
while 1:
    # Create connection socket
    connection_socket, addr = serverSocket.accept()
    
    # Receive message from client
    message = connection_socket.recv(2048)
    
    # Modify the message
    modified_message = message.upper()
    
    # Send the modified message
    connection_socket.send(modified_message)
    print "Reply sent"
    print addr
# Close communication with client
connection_socket.close()


TCP client:
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# Import libraries
import socket

# Create server
ServerName = 'localhost'
ServerPort = 1200
ServerAddress = (ServerName, ServerPort)

# Create client socket
clientSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # IPv4, TCP socket

# Ask for connection to server
clientSocket.connect(ServerAddress)

# three-way handshake is performed
# a TCP connection is established between the client and server.
while 1:
    
    # Create message
    message = raw_input('Enter the lower case message: ')

    # Send message
    clientSocket.send(message)

    # Receive from server
    modified_sent = clientSocket.recvfrom(2048)

    # Print received message
    print "From server:", modified_sent
    
    continue

# Close connection
clientSocket.close()

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