Task 1: Server Socket Creation

Step 1

• In the PyCharm project created in L1, create a new Python file by right-clicking the projects folder, and selecting New > Python File. Name the file Server Message.

Step 2

• Import the socket module to the file.

import socket

Step 3

• Create a socket variable.

sock = socket.socket()

Step 4

• Bind the socket to accept connections from all IP addresses on port 4444.

sock.bind(("0.0.0.0", 45000))

Step 5

• Allow only one connection to the socket.

sock.listen(1) 

Step 6

• Allow the server to accept connections, and save the connection object and the address to variables.

conn, addr = sock.accept() 

Step 7

• Send a welcome message to the connected client.

conn.send("Welcome to the server!")

Step 8

• Encode the message sent to the client.

conn.send("Welcome to the server!".encode()) 

Step 9

• Accept a message from the client and print it.

print(conn.recv(2048).decode()) 

Step 10

• Close the connection.

sock.close()

Task 2: Client Socket Creation

Step 1

• Create a new Python file by right-clicking the projects folder, and selecting New > Python File. Name the file Client Message.

Step 2

• Import the socket module to the file.

import socket

Step 3

• Create a socket variable.

sock = socket.socket()

Step 4

• Connect the socket to the listener in the server.

sock.connect(("127.0.0.1", 45000))

Step 5

• Allow the client to receive the message from the server, and print it.

print(sock.recv(2048).decode())

Step 6

• Return a message to the server notifying it that the client received the message.

sock.send("Thanks!".encode()) 

Step 7

• Close the connection.

sock.close()

Step 8

• Execute the server script.

Step 9

• Execute the client script.

Step 10

• Notice the message the client received.

Step 11

• Notice the message the server received.

Final Code

Client Message

"""Lab Objective: Create a server socket and a client socket and enable them to communicate with each other."""
import socket

sock = socket.socket()
sock.connect(("127.0.0.1", 45000))
print(sock.recv(2048).decode())
sock.send("Thanks!".encode())
sock.close()

input("\nPress 'Enter' to exit the program")# prevents program from closing upon execution

Server Message

"""Lab Objective: Create a server socket and a client socket and enable them to communicate with each other."""

import socket

sock = socket.socket()
sock.bind(("0.0.0.0", 45000))
sock.listen(1)
conn, addr = sock.accept()
conn.send("Welcome to the server!".encode())
print(conn.recv(2048).decode())
sock.close()

input("\nPress 'Enter' to exit the program")# prevents program from closing upon execution