python uses sockets to create tcp servers and clients.
The server side is a timestamp server that automatically replies after receiving data from the client.
Client, waits for user input, returns and sends the user input to the server.
Tested under python2.7 and python3.6 respectively. You need to start the server side first and the client side at startup.
under python 2.7
The server-side code is
#coding:utf-8
from socket import *
from time import ctime
print("=====================timestampTCPserver (computer)=====================");
HOST = '' # The host number is blank to indicate that any available address can be used.
PORT = 21567 # port number
BUFSIZ = 1024 #Receive data buffer size
ADDR = (HOST, PORT)
tcpSerSock = socket(AF_INET, SOCK_STREAM) # Create TCP server sockets
(ADDR) # Sockets bound to addresses
(5) # Listen for connections, maximum number of simultaneous connection requests
while True:
print('Waiting for the client to connect...')
tcpCliSock, addr = () # Receive client connection requests
print('Get Connection:', addr)
while True:
data = (BUFSIZ) # Receive the specified bytes of data consecutively, received as a byte array
if not data: #If the data is blank, the client exits, so exit reception
break
('[%s] %s' % (ctime(), data)) # Send timestamp data to the client
() # Close the connection with the client
() # Close the server socket
The client code is
#coding:utf-8
from socket import *
print("=====================TCPclient (computing)=====================");
HOST = '127.0.0.1' # Server ip address, equivalent to localhost.
PORT = 21567 # Communication port number
BUFSIZ = 1024 #Receive data buffer size
ADDR = (HOST, PORT)
tcpCliSock = socket(AF_INET, SOCK_STREAM) # Create client sockets
(ADDR) # Initiate a TCP connection
while True:
data = raw_input('> ') # Receive user input
if not data: #If the user input is empty, just enter will send "", "" is for false
break
(data) # Clients send messages
data = (BUFSIZ) #Receive response messages, received as byte arrays
if not data: # If receiving a server message fails, or there is no message response
break
print(data) #Print Response Message
() # Close the client socket
under python 3.6
The server-side code is
#coding:utf-8
from socket import *
from time import ctime
print("=====================timestampTCPserver (computer)=====================");
HOST = '127.0.0.1' # The host number is blank to indicate that any available address can be used.
PORT = 21567 # port number
BUFSIZ = 1024 #Receive data buffer size
ADDR = (HOST, PORT)
tcpSerSock = socket(AF_INET, SOCK_STREAM) # Create TCP server sockets
(ADDR) # Sockets bound to addresses
(5) # Listen for connections, maximum number of simultaneous connection requests
while True:
print('Waiting for the client to connect...')
tcpCliSock, addr = () # Receive client connection requests
print('Get Connection:', addr)
while True:
data = (BUFSIZ) # Receive the specified bytes of data consecutively, received as a byte array
if not data: #If the data is blank, the client exits, so exit reception
break
#('[%s] %s' % (bytes(ctime(), 'utf-8'), data))
(bytes('[%s] %s' % (ctime(), ('utf-8')), 'utf-8')) # Send timestamp data to client, must send byte array
() # Close the connection with the client
() # Close the server socket
The client code is
#coding:utf-8
from socket import *
print("=====================TCPclient (computing)=====================");
HOST = '127.0.0.1' # Server ip address, equivalent to localhost.
PORT = 21567 # Communication port number
BUFSIZ = 1024 #Receive data buffer size
ADDR = (HOST, PORT)
tcpCliSock = socket(AF_INET, SOCK_STREAM) # Create client sockets
(ADDR) # Initiate a TCP connection
while True:
data = input('> ') # Receive user input
if not data: #If the user input is empty, just enter will send "", "" is for false
break
(bytes(data, 'utf-8')) # Client sends message, must send byte array
data = (BUFSIZ) #Receive a response message, received as an array of bytes
if not data: # If receiving a server message fails, or there is no message response
break
print(('utf-8')) # Print the response message, or str(data, "utf-8")
() # Close the client socket
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