Python Simple socket Networking programming [ Echo Server / Echo Client ]

TCP/IP socket Networking 

클라이언트는 서버측에게 message 를 보낸다.

서버에서는 클라이언트로부터 받은 Message 를 받아서 판별하고 해당값따른 다른값을 Send 해준다.

클라이언트는 서버로부터 받은 메세지를 print 해준다.

Echo 서버, Echo 클라이언트를 약간수정해보았다.

Client Side Code.

# Python 2.7 Version Client 
# OS  Raspbian  < Raspberry pi 3>
import socket
import sys
import select
from time import ctime

HOST = '192.168.0.90'
PORT = 9999
ADDR = (HOST,PORT)

clinetSocket = socket.socket(socket.AF_INET , socket.SOCK_STREAM)

try:
     Msg = 'hi'   # Message Variable
     clientSocket.connect(ADDR)        # connect Server 
     clientSocket.send(Msg)   # Send Message  
 
except Exception as e:
     print('%s  %s' % ADDR)
     sys.exit()


receiveMsg = clientSocket.recv(1024)

print('RECV : %s' % receiveMsg )

Server Side Code.

# Python 2.7 Version Server Side 
# OS  windows 10 < PC >
import socket
import select

HOST = ''
PORT = 9999
BUFSIZE = 1024
ADDR = (HOST,PORT)

serverSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

serverSocket.bind(ADDR)

print('bind')

serverSocket.listen(10)
print('listen')

clientSocket, addr_info = serverSocket.accept()

print('accept')
print('---client Info----')
print(clientSocket)

data = clientSocket.recv(10000)

if data == 'hi':
	clientSocket.send(data)   #receive 값을 판별하여 해당값이맞을경우 client 측에보냄 

	
else:
	print("not")

clientSocket.close()
serverSocket.close()

print('closed')