[PGTips]

I want to install a program onto 4 computers that just listens for a command by 1 main server.

How would I go about doing that?

Should I install 4 servers on each PC and my main client program speaks to all of them?

Or

Should I create a client where its just listening for calls from the server (seems more logical). If so, how would I go about doing this?

What I have so far:
client.py

Code

# a simple client socket
import socket

# define socket address
TCP_IP = '127.0.0.1'  # ip of the server we want to connect to
TCP_PORT = 5000  # port used for communicating with the server
BUFFER_SIZE = 1024  # buffer size used when receiving data

# create socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print ("Socket created successfully.")

# connect to server
s.connect((TCP_IP, TCP_PORT))
print ("Established connection with the server.")

message = b"I've been sent from the client!"
# send message to the server
s.send(message)
print ("Message sent to server.")

# receive data from server
data = s.recv(BUFFER_SIZE)
print ("Here's the message received from the server:")
print (data)

Server.py

Code

# a simple server socket
import socket

# define socket address
TCP_IP = '0.0.0.0'  # consider all possible incoming IPs
TCP_PORT = 5000  # port used for communicating with the client
BUFFER_SIZE = 1024  # buffer size used when receiving data

# create socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print ("Socket created successfully.")

# bind socket
s.bind((TCP_IP, TCP_PORT))

# start listening
s.listen(20)
print ("Waiting for a connection...")

# wait for connection
while True:
    # accept connection
    conn, addr = s.accept()
    print ("Connected with " + addr[0] + " " + str(addr[1]))
  
    # get message from client
    message = conn.recv(BUFFER_SIZE)
    # check that there is a message  
    if not message:
        break
  
    # put some logic here, if needed
    
    server_message = b"I'm the message from the server..."
    #server_message = input("Enter message")
    #server_message = b(server_message)

    # send message to client
    conn.send(server_message)

s.close()

[Davian]

Server:

PHP Code


<?php 
import socket
clients = []
s = socket.socket()
s.bind(('0.0.0.0', 5000))
s.listen(4)
while len(clients) != 4:
    conn, addr = s.accept()
    clients.append(conn)
while True:
    client = int(raw_input('Client 1/2/3/4: ')) - 1
    command = raw_input('Command: ')
    clients[client].send(command) 


Client:

PHP Code


<?php 
import socket
s = socket.socket()
s.connect(('0.0.0.0', 5000))
while True:
    command = s.recv(1024)
    if not command:
        break
    elif command == whatever:
        #Do whatever 


[nizarnizario]

Why don't u install Apache or Nginx in the server, and host a file that commands the clients, it's easier to deal with , you'll just need to learn some web programming language like PHP or Python (Django/Flask/Bottle...)...

[PGTips]

Server:

PHP Code


<?php 
import socket
clients = []
s = socket.socket()
s.bind(('0.0.0.0', 5000))
s.listen(4)
while len(clients) != 4:
    conn, addr = s.accept()
    clients.append(conn)
while True:
    client = int(raw_input('Client 1/2/3/4: ')) - 1
    command = raw_input('Command: ')
    clients[client].send(command) 


Client:

PHP Code


<?php 
import socket
s = socket.socket()
s.connect(('0.0.0.0', 5000))
while True:
    command = s.recv(1024)
    if not command:
        break
    elif command == whatever:
        #Do whatever 


Bloody brilliant, I do have 1 question though.

How do I make it so that clients (if the server is up) attempts to connect to them again after X amount of time?

Sometimes the client.py will connect and after 10 minutes it will disconnect, I need them to try to connect all the time if that makes sense?

[HailPinkFloyd]

I love how you said "bloody brilliant" lmao

[Davian]

Bloody brilliant, I do have 1 question though.

How do I make it so that clients (if the server is up) attempts to connect to them again after X amount of time?

Sometimes the client.py will connect and after 10 minutes it will disconnect, I need them to try to connect all the time if that makes sense?

Just wrap client.py with while True 🤝

PHP Code


<?php 
import socket
while True:
    s = socket.socket()
    s.connect(('0.0.0.0', 5000))
    while True:
        command = s.recv(1024)
        if not command:
            break
        elif command == whatever:
            #Do whatever
    s.close()