Socket server-client example

README.md

An example of server-client interaction with Python socket for Stackoverflow question: https://stackoverflow.com/questions/45833771

client.py

from __future__ import print_function

import socket

try:
    input = raw_input
except NameError:
    pass


host = socket.gethostname()
port = 12345

while True:
    req = input("Request to send: ")

    s = socket.socket(socket.AF_INET,
                      socket.SOCK_STREAM)
    s.connect((host, port))
    try:
        s.sendall(bytes(req, "ascii"))
    except TypeError:
        s.sendall(req)
    data = s.recv(1024)
    s.close()
    print('Received', repr(data))

server.py

from __future__ import print_function

import socket
import time

host = ""
port = 12345
s = socket.socket(socket.AF_INET,
                  socket.SOCK_STREAM)
s.bind((host, port))
s.listen(1)
while True:
    print("Listening on port: {}".format(port))

    conn, addr = s.accept()

    print("Connected by", addr)

    # Receive all data
    while True:
        data = conn.recv(1024)
        print("Recevied some data: {}".format(data))
        print("It was of type: {}".format(type(data)))
        break

    print("Checking data to form response")
    # Check the data and prepare the response
    if data == "TIME" or data == b"TIME":
        time_str = (time.ctime(time.time()) + "\r\n").encode('ascii')
        print("Got a TIME request, sending: {}".format(time_str))
        return_data = time_str 
    else:
        print("Got a {} request, unknown.".format(data))
        return_data = "Unknown request"

    # Send the result back to the client
    try:
        conn.sendall(bytes(return_data, "ascii"))
    except TypeError:
        conn.sendall(return_data)
    conn.close()