Python Socket Programming - Server Client basic

Question

I recently started learning socket programming with python. Starting with the most basic scripts of server and client on the same computer, I wrote the following code.

Server.py

import socket
import time

serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
host = socket.gethostname()
port = 9999
serversocket.bind((host,port))
serversocket.listen(5)

while True:
    clientsocket, addr = serversocket.accept()
    print("Got a connection from %s" %str(addr))
    currentTime = time.ctime(time.time()) + "\r\n"
    clientsocket.send(currentTime.encode('ascii'))
    clientsocket.close()

Client.py

import socket

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
host = socket.gethostname()
port = 9999
s.connect((host,port))
tm = s.recv(1024)
s.close()
print("The time got from the server is %s" %tm.decode('ascii'))

I'm using spyder IDE. Whenever I run the client in the IPython Console, this is what I get: "ConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it."

and whenever I run the Server I get an unending process.

So, what should I do to make this work?

Thank you for any help!

Credits :- http://www.bogotobogo.com/python/python_network_programming_server_client.php

Googling "ConnectionRefusedError: [WinError 10061]" gives me this, and this, and a few others. Have you taken a look at those? — Ramon
– Ramon, Commented Jul 6, 2017 at 18:34

TheoretiCAL · Accepted Answer · 2017-07-06 19:00:35Z

3

Try changing socket.gethostname() to socket.gethostbyname(socket.gethostname()). gethostbyname returns the ip for the hostname. You want to setup a socket to connect to an ip, port. Alternatively, since you are running everything locally, just set your host to "127.0.0.1" directly for both the client/server.

edited Jul 6, 2017 at 19:00

answered Jul 6, 2017 at 18:21

TheoretiCAL

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1 Comment

Joran Beasley Over a year ago

I would probably just advise to use 'localhost','127.0.0.1', or '0.0.0.0' ... but great answer +1

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