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A simple client/server application in Python
# Python Aug 09 2003 - 06:55 EST Posted By numberXIII
  (0) | One of the most interesting feature in a programming language (in my point of view) is the ability to program sockets, that establishes a direct connection on various ports of a computer either waiting for a connection ( server model) or sending information to an already open port ( client model). The language here will be Python.
It is an nice high level programming language with loose typing , that is variables are declared when initialized and you don’t have to worry about what type they are , python will set the type for you! Now to our sockets. For this example we are going to establish a server socket and bind it to an open port. It will wait for a connection and print what is sent to it. The client will send information to the server socket ( in this example , the current time) and the server will print the time it receives from the client.
Server socket:
# Server socket:
import socket
import time
s = socket(AF_INET, SOCK_STREAM) # initialize TCP socket
s.bind((“”,8888)) # bind the socket to port 8888
s.listen(5) # the socket starts listening on port 8888 with a maximum of 5 connections
while 1:
client, addr = s.accept() # wait for a connection
print “ Got a connection from “, addr
client.send (time,ctime(time.time())) # send time back
client.close() # close the connection
Client socket:
# Client socket:
import socket
s = socket(AF_INET, SOCK_STREAM) # initialize TCP socket such as the server socket
s.connect((“localhost”,8888)) # connect to server socket
tm = s.recv(1024) # receive a maximum of 1024 bytes
s.close() # close socket
print “ The current time is”, tm
For more information on python, here are some links:
http://www.python.org
The official python website
http://www.awaretek.com/tutorials.html
Great list of python tutorials
http://www.scriptol.org/python.html
nice introduction to the language
XIII
numberXIII@Phreaker.net
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