Question

Implement your first Networking application that uses the Client-Server model. Using Python and either TCP or UDP Protocol, the application should do the following:

1. Client reads a line of characters (data) from its keyboard and sends data to server

2. Server receives the data and converts characters to uppercase

3. Server sends modified data to client

4. Client receives modified data and displays line on its screen

Answer 1

********** server.py********

import socket

name_host = socket.gethostname()
port = 8550 # port Number

socket = socket.socket()
socket.bind((name_host, port)) # bind Socket

socket.listen(2)
conn, add = socket.accept()
print("Connection Done" + str(add)) # print connection info

while True:
data_client = conn.recv(1024).decode() # receive data
if not data_client:
break
print("Client Message: " + str(data_client))
upper = data_client.upper() # Upper case conversion
conn.send(upper.encode()) # send data

conn.close() # close connection

*********** client.py*******

import socket

name_host = socket.gethostname()
port = 8550 #port

socket = socket.socket()   
socket.connect((name_host, port)) # connect to the server

data = raw_input("->")   

while data.lower().strip() != 'bye':
socket.send(data.encode()) # send message
data = socket.recv(1024).decode() # receive data
print('Data Received from server: ' + data)

data = raw_input("->")   

socket.close() # close the connection

*********** OUTPUT ********

server output:

client ouput :