I am trying to make a group chat program, where an unlimited amount of clients may join the server using the same script, it'll work by the server receiving the clients message and sending it to all the connected clients including the sender. I have only managed to make it so that the sender only gets his own message back, but not what another client sends.
I was thinking of storing all the connected client IP's in a list, and sending it to each IP, but I do not know how to change the recpient of socket.send
Server code:
from threading import *
import socket
s = socket.socket()
host = socket.gethostbyname(socket.gethostname())
port = 1337
s.bind((host, port))
s.listen(5)
print("Server host is", host)
def getMainThread():
for thread in enumerate():
if thread.name == 'MainThread':
return thread
return None
class client(Thread):
def __init__(self, socket, address):
Thread.__init__(self)
self.socket = socket
self.address = address
self.start()
def run(self):
main = getMainThread()
while main and main.isAlive():
print(self.address, "has connected!")
message = self.socket.recv(8192).decode('utf-8')
self.socket.send(bytes(message, 'UTF-8'))
self.socket.close()
while True:
c, addr = s.accept()
client(c, addr)
clients = [] #list for all client IP's
clients.append(addr)
Also, is there a way so that the client can establish a connection with the server so it doesn't keep poping up on the server.py that client has connected each time it sends a message?
Client code:
import socket
import os
import sys
host = '25.154.84.23'
print("""
=======================================================
=Welcome to Coder77's local internet messaging service=
=======================================================
The current soon to be encrypted server is {0}
You can enter the command /help for a list of commands available
""".format(host))
#username = input("Enter username: ")
username = 'Smile'
print("Now connecting to {0}....".format(host))
def printhelp():
print("""
The following commands are in the current version of this program:
/clear to clear the screen
/username to change your username
/exit to exit
/help for a list of commands
""")
def main():
global username
global host
sock = socket.socket()
try:
sock.connect((host, 1337))
while True:
message2 = input("{0}: ".format(username))
message = ('{0}: {1}'.format(username,message2))
if '/quit' in message:
sys.exit()
if '/clear' in message:
os.system('cls')
if '/help' in message:
printhelp()
if '/username' in message:
username = input("What would you like as your new username? ")
sock.send(bytes(message, 'UTF-8'))
received = sock.recv(8192).decode('utf-8')
print(received)
except socket.error:
print("Host is unreachable")
if __name__ == '__main__':
main()
#
Corrected Server code:
import sys
print(sys.version)
from threading import *
import socket
s = socket.socket()
host = socket.gethostbyname(socket.gethostname())
port = 1337
s.bind((host, port))
s.listen(5)
print("Server host is", host)
def getMainThread():
for thread in enumerate(): # Imported from threading
if thread.name == 'MainThread':
return thread
return None
class Client(Thread):
def __init__(self, socket, address):
Thread.__init__(self)
self.socket = socket
self.address = address
self.start()
def run(self):
main = getMainThread()
print(self.address, "has connected!")
while main and main.isAlive():
message = self.socket.recv(8192).decode('utf-8')
print(message)
self.socket.send(bytes(message, 'UTF-8'))
for each_client in clients:
each_client.socket.send(bytes(message, 'UTF-8'))
while True:
c, addr = s.accept()
this_client = Client(c, addr)
clients = []
clients.append(this_client)
The new code, adapted by gravetii is causing a lot of format errors. What happens now, is the user gets back what he sent, he does not get back what other users send and the user gets back what his previous message was, its terribly confusing. Please run the code, and you'll see as it's very hard to explain.
Example
In your server code, you are doing only a self.socket.send(bytes(message, 'UTF-8')). How can you then expect the server to send the message to all the clients? To do that you would need to iterate through the list of clients and call the send() method on each of their sockets.
while True:
c, addr = s.accept()
client(c, addr)
clients = [] #list for all client IP's
clients.append(addr)
In this code, you are creating a client object but never adding it to the list, then what's the point of creating one?
I think what you want is this:
while True:
c, addr = s.accept()
this_client = client(c, addr)
clients = [] #list for all client IP's
clients.append(this_client)
Then, you can send the message to all the clients by modifying the relevant part of your server code:
def run(self):
main = getMainThread()
while main and main.isAlive():
print(self.address, "has connected!")
message = self.socket.recv(8192).decode('utf-8')
self.socket.send(bytes(message, 'UTF-8'))
for each_client in clients:
each_client.socket.send(bytes(message, 'UTF-8'))
Also, why are you closing the connection after sending just one message? I believe your intention is to send more than one message to the server, and in that case, you don't need to close the connection.
Also, it's a better idea to create a class with its name starting with an upper case letter. So you may want to use Client instead of client for the class name.
Now coming to the issue of the message popping up everytime a client says something in your server.py, look at the run() method for the client thread:
def run(self):
main = getMainThread()
while main and main.isAlive():
print(self.address, "has connected!")
message = self.socket.recv(8192).decode('utf-8')
self.socket.send(bytes(message, 'UTF-8'))
The thread starts executing as soon as you create the client object, and so the first time when it connects to the server, it is right in showing that message. But then it's incorrect to place the print(self.address, "has connected!") in the while loop. So everytime the client says something, the server sends it back to the client and then the loop runs again, thus displaying the message back again. You need to modify it like so:
def run(self):
print(self.address, "has connected!")
main = getMainThread()
while main and main.isAlive():
message = self.socket.recv(8192).decode('utf-8')
self.socket.send(bytes(message, 'UTF-8'))
Hope this helps!
Related
I'm writing a simple console chat with server and client. When receiving a message from the first client server should send it to the second client and vice versa. But when first client sends a message to the server it returns back and doesn't reach the second client. Maybe there is a problem in receiving() function.
Here is my client.py:
import socket
from _thread import *
def recieving(clientSocket):
while True:
encodedMsg = clientSocket.recv(1024)
decodedMsg = encodedMsg.decode('utf-8')
print(decodedMsg)
def chat(clientSocket, name):
msg = input()
encoded_msg = f'[{name}] {msg}'.encode('utf-8')
clientSocket.send(encoded_msg)
def main():
serverAddress = (socket.gethostname(), 4444)
clientSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
clientSocket.connect(serverAddress)
name = input('Enter your name: ')
start_new_thread(recieving, (clientSocket,))
while True:
chat(clientSocket, name)
if __name__ == "__main__":
main()
And server.py:
import time
import socket
from _thread import *
def listen(clientSocket, addr):
while True:
encodedMsg = clientSocket.recv(1024)
decodedMsg = encodedMsg.decode('utf-8')
currTime = time.strftime("%Y-%m-%d-%H.%M.%S", time.localtime())
for client in clients:
if addr != client:
clientSocket.sendto(encodedMsg, client)
print(f'[{currTime}] {decodedMsg}')
def main():
serverAddress = (socket.gethostname(), 4444)
global clients
clients = []
serverSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
serverSocket.bind(serverAddress)
serverSocket.listen(2)
while True:
clientSocket, addr = serverSocket.accept()
if addr not in clients:
clients.append(addr)
print(f'{addr} joined chat')
start_new_thread(listen, (clientSocket, addr))
if __name__ == '__main__':
main()
sendto doesn't work as expected if its socket is connected. It just sends to the connected socket, not the specified address.
Therefore, listen needs to be able to access the open socket of each client in order to write to it.
Currently clients is a list of addresses, but you could change it to a dict of address to socket mappings:
def main():
global clients
clients = {}
Then when you get a new client connection, save address and socket:
clientSocket, addr = serverSocket.accept()
if addr not in clients:
clients[addr] = clientSocket
print(f'{addr} joined chat')
start_new_thread(listen, (clientSocket, addr))
Finally, in listen, write to each other client's socket, not the connected clientSocket for that listen thread:
for client in clients:
if addr != client:
print(f"sending message from {addr} to {client}")
clients[client].send(encodedMsg)
There's a number of other problems with your code.
Sockets are not thread safe. So there is a race condition if 2 clients happen to write the same thing at the same time; the writes could be interpolated and the messages munged up.
If a client disconnects, the server doesn't handle the disconnection well. If the server disconnects, the clients go into an infinite loop as well.
First, i ask a lot of questions i know it and i'm sorry... Anyway, i have a few problem on my Application.
I developed a TCP Chat Room with socket and thread modules. Everything is fine but when I write something I see it twice. I only want to see this once and like (ME : Message). Not only that, when I press CTRL + C I can't exit the application and even if I shut down the server, clients can message and the application stops. Finally, I want all messages from the user to be logged. How can I do that?
def broadcast(MESSAGE):
for CLIENT in CLIENT_LIST:
CLIENT.send(MESSAGE)
def handle(CLIENT):
while True:
try:
MESSAGE = CLIENT.recv(1024)
broadcast(MESSAGE)
except:
INDEX = CLIENT_LIST.index(CLIENT)
CLIENT.close()
USERNAME = USERNAME_LIST[INDEX]
broadcast (f'{USERNAME} Left The Chat!'.encode('utf-8'))
USERNAME_LIST.remove(USERNAME)
break
I will share my codes for you. I want learn it and solve with you. I know when i see a problem i'm writing here. Sorry, i'm writing there because i'm beginner so i'm a new in this world :)
import socket
import threading
HOST = "127.0.0.1"
PORT = 7777
ADDR = (HOST,PORT)
SERVER_SOCKET = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
SERVER_SOCKET.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
SERVER_SOCKET.bind((ADDR))
SERVER_SOCKET.listen()
CLIENT_LIST = []
USERNAME_LIST = []
def broadcast(MESSAGE):
for CLIENT in CLIENT_LIST:
CLIENT.send(MESSAGE)
def handle(CLIENT):
while True:
try:
MESSAGE = CLIENT.recv(1024)
broadcast(MESSAGE)
except:
INDEX = CLIENT_LIST.index(CLIENT)
CLIENT.close()
USERNAME = USERNAME_LIST[INDEX]
broadcast (f'{USERNAME} Left The Chat!'.encode('utf-8'))
USERNAME_LIST.remove(USERNAME)
break
def take():
while True:
CLIENT, ADDRESS = SERVER_SOCKET.accept()
print(f'Connected With {str(ADDRESS)}')
CLIENT.send("USERNAME".encode('utf-8'))
USERNAME = CLIENT.recv(1024).decode('utf-8')
USERNAME_LIST.append(USERNAME)
CLIENT_LIST.append(CLIENT)
print(f'Username Of The Client Is {USERNAME}!')
broadcast(f'{USERNAME} Joined The Chat! Welcome!'.encode('utf-8)'))
CLIENT.send("Connected To The Server!".encode('utf-8'))
thread = threading.Thread(target=handle, args=(CLIENT, ))
thread.start()
print("Server Is Listening...")
take()
Disclaimer: The following are direct solutions, but may not be the best design choice overall.
Seeing message twice:
The CLIENT sending MESSAGE is being broadcasted to again. Exclude sender from broadcast():
def broadcast(MESSAGE, sender):
for CLIENT in CLIENT_LIST:
if CLIENT == sender: continue
CLIENT.send(MESSAGE)
...
broadcast(MESSAGE, CLIENT)
Threads not stopping with CTRL+C:
You can set daemon=True to stop the thread with the parent process, but read the warning here
thread = threading.Thread(target=handle, args=(CLIENT, ), daemon=True)
Hello I tried to make a simple server that accept multiple clients simultaneously I'm new to python and I have a difficult to understand it....I try to change my code in multi-thread applications but without positive result...here is the code:
import socket, threading
def message():
while 1:
data = connection.recv(1024)
if not data: break
#connection.sendall(b'-- Message Received --\n')
print(data.decode('utf-8'))
connection.close()
def connection():
address = input("Insert server ip")
port = 44444
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((address, port))
s.listen(1)
print("Server started! Waiting for connections...")
def accept connection():
connection, address = s.accept()
print('Client connected with address:', address)
t=thread.Threading(target=message,args=(connection))
t.run()
I know that there are many errors but I'm new in python sorry :(
The original non-threaded code is:
import socket
address = input("Insert server ip:")
port = 44444
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((address, port))
s.listen(1)
print("Server started! Waiting for connections...")
connection, address = s.accept()
print('Client connected with address:', address)
while 1:
data = connection.recv(1024)
if not data: break
#connection.sendall(b'-- Message Received --\n')
print(data.decode('utf-8'))
connection.close()
Your basic design is close, but you've got a whole lot of little problems making it hard to move forward.
First, you have a function name with a space in it, which isn't allowed. And you have an IndentationError because you didn't indent its contents.
Next, inside that accept_connection function, you're using threading wrong.
thread.Threading doesn't exist; you probably meant threading.Thread.
args has to be a sequence (tuple, list, etc.) of values. You probably expected (connection) to be a tuple of one value, but it's not; tuples are defined by commas, not parentheses, and what you have is just the value connection with superfluous parentheses around it. You wanted (connection,) here.
Also, calling run on a thread object just runs the thread's code in the current thread. You want to call start, which will start a new thread and call the run method on that thread.
Meanwhile, you're never actually calling this function anywhere, so of course it can't do anything. Think about where you want to call it. After creating the listener socket, you want to loop around accept, kicking off a new client thread for each accepted connection, right? So, you want to call it in a loop, either inside connection, or at the top level (in which case connection has to return s).
And finally, your accept_connection function can't access local variables from some other function; if you want it to use a socket named s, you have to pass it as a parameter.
So:
def connection():
address = input("Insert server ip")
port = 44444
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((address, port))
s.listen(1)
print("Server started! Waiting for connections...")
while True:
accept_connection(s)
def accept_connection(s):
connection, address = s.accept()
print('Client connected with address:', address)
t=thread.Threading(target=message, args=(connection,))
t.start()
As a side note, be careful with using sock.recv(1024) and assuming you're going to get the whole message that the other side sent with send(msg). You might get that, or you might get half the message, or the whole message plus half of another message the client sent later. Sockets are just streams of bytes, like files, not streams of separate messages; you need some kind of protocol to separate messages.
The simplest possible protocol is to send each message on its own line. Then you can just do socket.makefile() and for line in f:, just like you would for a real file. Of course this doesn't work if your messages can have newlines, but you can, e.g., backslash-escape them on one side and unescape them on the other.
This is a pretty old post but there's a nice way to do what you're talking about. Here's a link to an example I posted a little while back:
https://bitbucket.org/matthewwachter/tcp_threadedserver/src/master/
And the script:
from datetime import datetime
from json import loads, dumps
from pprint import pprint
import socket
from threading import Thread
class ThreadedServer(Thread):
def __init__(self, host, port, timeout=60, debug=False):
self.host = host
self.port = port
self.timeout = timeout
self.debug = debug
Thread.__init__(self)
# run by the Thread object
def run(self):
if self.debug:
print(datetime.now())
print('SERVER Starting...', '\n')
self.listen()
def listen(self):
# create an instance of socket
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
# bind the socket to its host and port
self.sock.bind((self.host, self.port))
if self.debug:
print(datetime.now())
print('SERVER Socket Bound', self.host, self.port, '\n')
# start listening for a client
self.sock.listen(5)
if self.debug:
print(datetime.now())
print('SERVER Listening...', '\n')
while True:
# get the client object and address
client, address = self.sock.accept()
# set a timeout
client.settimeout(self.timeout)
if self.debug:
print(datetime.now())
print('CLIENT Connected:', client, '\n')
# start a thread to listen to the client
Thread(target = self.listenToClient,args = (client,address)).start()
# send the client a connection message
# res = {
# 'cmd': 'connected',
# }
# response = dumps(res)
# client.send(response.encode('utf-8'))
def listenToClient(self, client, address):
# set a buffer size ( could be 2048 or 4096 / power of 2 )
size = 1024
while True:
try:
# try to receive data from the client
data = client.recv(size).decode('utf-8')
if data:
data = loads(data.rstrip('\0'))
if self.debug:
print(datetime.now())
print('CLIENT Data Received', client)
print('Data:')
pprint(data, width=1)
print('\n')
#send a response back to the client
res = {
'cmd': data['cmd'],
'data': data['data']
}
response = dumps(res)
client.send(response.encode('utf-8'))
else:
raise error('Client disconnected')
except:
if self.debug:
print(datetime.now())
print('CLIENT Disconnected:', client, '\n')
client.close()
return False
if __name__ == "__main__":
ThreadedServer('127.0.0.1', 8008, timeout=86400, debug=True).start()
Here is some example code I have showing a threaded socket connection.
def sock_connection( sock, host ):
"Handle socket"
pass
while 1:
try:
newsock = sock.accept()
thread = Thread( target=sock_connection, args=newsock )
thread.start()
except Exception, e:
print "error on socket connection: " % e)
All of the below mentioned is on windows machines using python 2.7
Hello,
I am currently attempting to listen on a socket for data send by a remote program. This data is then printed to the screen and user input is requested that is then returned to remote program. In testing I have been able to have the remote program send me a menu of command line programs (cmd, ipconfig, whoami, ftp) and then my program returns with a number as a selection of the menu option.
The remote program receives my response and sends the output of the selected command. ipconfig and whoami work perfectly, but cmd and ftp only returns the output of the terminal once. (I.E. I can enter one command into the FTP program and send that too the remote program before I never hear back)
The part of my code that fails is that
if ready[0]: never becomes ready a second time after the first conversation.
I know the remote program is functioning correctly as I can use netcat to act in lieu of my code and operate the cmd terminal indefinitely.
How do I go about properly implementing a python socket listener that can account for this type of connection?
My "program" in its entirety:
import socket, sys, struct, time, select
host = ''
port = 50000
connectionSevered=0
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
except socket.error:
print 'Failed to create socket'
sys.exit()
print '[+] Listening for connections on port '+str(port)+'.'
s.bind((host,port))
s.listen(5)
def recvall(the_socket,timeout=2):
global connectionSevered
data=''; # Data found by recv
total_data=[]; # Finally list of everything
s.setblocking(0) #make socket non blocking
begin=time.time() #beginning time
while 1:
ready = select.select([client], [], [], .2)
if time.time()-begin > timeout:
print 'Timeout reached'
#Leave loop, timer has reached its threshold
break
if ready[0]:
print 'In ready loop!'
try:
data = client.recv(4096) #attempt to fetch data
if data:
begin=time.time() #reset timeout timer
total_data.append(data)
data='';
except socket.error:
print '[+] Lost connection to client. Printing buffer...'
connectionSevered=1 # Let main loop know connection has errored
pass
time.sleep(1)
#join all parts to make final string
return ''.join(total_data)
client, address = s.accept()
print '[+] Client connected!'
while (connectionSevered==0): # While connection hasn't errored
print "connectionSevered="+str(connectionSevered) # DEBUG
recvall(s)
response = raw_input() #take user input
client.sendto(response) #send input
client.close(0)
Please let me know if you need more information, any help would be greatly appreciated, I am very new to this and eager to learn.
Playing around with this for a while finally got it working nice with a telnet session locally using python 2.7.
What it does is it sets up a thread that runs when the client connects listening for client stuff.
When the client sends a return ("\r\n" might have to change that if your interacting with a Linux system?) the message gets printed to the server, while this is happening if there is a raw input at the server side this will get sent to the client:
import socket
import threading
host = ''
port = 50000
connectionSevered=0
class client(threading.Thread):
def __init__(self, conn):
super(client, self).__init__()
self.conn = conn
self.data = ""
def run(self):
while True:
self.data = self.data + self.conn.recv(1024)
if self.data.endswith(u"\r\n"):
print self.data
self.data = ""
def send_msg(self,msg):
self.conn.send(msg)
def close(self):
self.conn.close()
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((host,port))
s.listen(5)
except socket.error:
print 'Failed to create socket'
sys.exit()
print '[+] Listening for connections on port: {0}'.format(port)
conn, address = s.accept()
c = client(conn)
c.start()
print '[+] Client connected: {0}'.format(address[0])
c.send_msg(u"\r\n")
print "connectionSevered:{0}".format(connectionSevered)
while (connectionSevered==0):
try:
response = raw_input()
c.send_msg(response + u"\r\n")
except:
c.close()
The above answer will not work for more than a single connection. I have updated it by adding another thread for taking connections. It it now possible to have more than a single user connect.
import socket
import threading
import sys
host = ''
port = 50000
class client(threading.Thread):
def __init__(self, conn):
super(client, self).__init__()
self.conn = conn
self.data = ""
def run(self):
while True:
self.data = self.data + self.conn.recv(1024)
if self.data.endswith(u"\r\n"):
print self.data
self.data = ""
def send_msg(self,msg):
self.conn.send(msg)
def close(self):
self.conn.close()
class connectionThread(threading.Thread):
def __init__(self, host, port):
super(connectionThread, self).__init__()
try:
self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.s.bind((host,port))
self.s.listen(5)
except socket.error:
print 'Failed to create socket'
sys.exit()
self.clients = []
def run(self):
while True:
conn, address = self.s.accept()
c = client(conn)
c.start()
c.send_msg(u"\r\n")
self.clients.append(c)
print '[+] Client connected: {0}'.format(address[0])
def main():
get_conns = connectionThread(host, port)
get_conns.start()
while True:
try:
response = raw_input()
for c in get_conns.clients:
c.send_msg(response + u"\r\n")
except KeyboardInterrupt:
sys.exit()
if __name__ == '__main__':
main()
Clients are not able to see what other clients say, messages from the server will be sent to all clients. I will leave that as an exercise for the reader.
If you're in Python 3 by now and still wondering about sockets, here's a basic way of using them:
server.py
import time
import socket
# creating a socket object
s = socket.socket(socket.AF_INET,
socket.SOCK_STREAM)
# get local Host machine name
host = socket.gethostname() # or just use (host == '')
port = 9999
# bind to pot
s.bind((host, port))
# Que up to 5 requests
s.listen(5)
while True:
# establish connection
clientSocket, addr = s.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
# creates socket object
s = socket.socket(socket.AF_INET,
socket.SOCK_STREAM)
host = socket.gethostname() # or just use (host = '')
port = 9999
s.connect((host, port))
tm = s.recv(1024) # msg can only be 1024 bytes long
s.close()
print("the time we got from the server is %s" % tm.decode('ascii'))
Run server.py first, then run client.py.
This is just send and receive the currentTime.
What's new in Python 3.4 sockets?
A major difference between python 2.7 sockets and python 3.4 sockets is the sending messages. you have to .encode() (usually using 'ascii' or blank as parameters/arguments)
and then using .decode()
For example use .encode() to send, and use .decode() to receive.
Extra info: client/server socket tutorial
Alright, I've spent about three hours fiddling with socket programming in Python trying to make a simple chat program. I've gotten the client to send text to the server and then, from then client, it repeats the message to it's self. However, I want the message to be sent to the server and then the server, not the client, re-send it to all client's connected. I'm having issues doing this. This is my code so far:
Server Side Code:
import SocketServer
def handle(self):
data = self.request[0].strip()
socket = self.request[1]
print "%s wrote:" % self.client_address[0]
print data
socket.sendto(data.upper(), self.client_address)
if __name__ == "__main__":
HOST, PORT = "localhost", 25555
server = SocketServer.UDPServer((HOST, PORT), MyUDPHandler)
server.serve_forever()
Client Side Code:
import socket
import sys
global HOST
global PORT
HOST, PORT = "localhost", 25555
while 1 > 0:
data = raw_input(">".join(sys.argv[1:]))
# SOCK_DGRAM is the socket type to use for UDP sockets
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
# As you can see, there is no connect() call; UDP has no connections.
# Instead, data is directly sent to the recipient via sendto().
sock.sendto(data + "\n", (HOST, PORT))
received = sock.recv(1024)
print "Sent: %s" % data
print "Received: %s" % received
Right now your app is instantiating the MyUDPHandler class for each client connection. When the connection is opened you need to store that instance to a static array or queue. Then when the handle() call is made it can loop through all those sockets and send a copy of the data to each of them.
I'd checkout the python documentation; it basically does what your looking to: http://docs.python.org/library/socketserver.html#asynchronous-mixins
And what I'd change from that example (Don't just drop this in; it probably has glaring bugs!):
handlerList = []
class ...
def handle(self):
handlerList.append(self)
while (1):
data = self.request.recv(1024)
if (not data):
break
cur_thread = threading.currentThread()
response = "%s: %s" % (cur_thread.getName(), data)
for x in handlerList:
x.request.send(response)
psudo_code_remove_self_from_handlerList()
Would you like to play with a server that echos packets to all sockets but the original source of the data?
import socket, select
def main():
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.bind(('', 8989))
server.listen(5)
sockets = [server]
while True:
for sender in select.select(sockets, [], [])[0]:
if sender is server:
sockets.append(server.accept()[0])
else:
try:
message = sender.recv(4096)
except socket.error:
message = None
if message:
for receiver in sockets:
if receiver not in (server, sender):
receiver.sendall(message)
else:
sender.shutdown(socket.SHUT_RDWR)
sender.close()
sockets.remove(sender)
if __name__ == '__main__':
main()