Network Tips

membuat server chat sederhana dengan script python 

oke langsung copy jangan lupa di copy di textedit atau notped sipan dengan chat_server.py

# chat_server.py
 
import sys
import socket
import select

HOST = '' 
SOCKET_LIST = []
RECV_BUFFER = 4096 
PORT = 9009

def chat_server():

    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    server_socket.bind((HOST, PORT))
    server_socket.listen(10)
 
    # add server socket object to the list of readable connections
    SOCKET_LIST.append(server_socket)
 
    print "Chat server started on port " + str(PORT)
 
    while 1:

        # get the list sockets which are ready to be read through select
        # 4th arg, time_out  = 0 : poll and never block
        ready_to_read,ready_to_write,in_error = select.select(SOCKET_LIST,[],[],0)
      
        for sock in ready_to_read:
            # a new connection request recieved
            if sock == server_socket: 
                sockfd, addr = server_socket.accept()
                SOCKET_LIST.append(sockfd)
                print "Client (%s, %s) connected" % addr
                 
                broadcast(server_socket, sockfd, "[%s:%s] entered our chatting room\n" % addr)
             
            # a message from a client, not a new connection
            else:
                # process data recieved from client, 
                try:
                    # receiving data from the socket.
                    data = sock.recv(RECV_BUFFER)
                    if data:
                        # there is something in the socket
                        broadcast(server_socket, sock, "\r" + '[' + str(sock.getpeername()) + '] ' + data)  
                    else:
                        # remove the socket that's broken    
                        if sock in SOCKET_LIST:
                            SOCKET_LIST.remove(sock)

                        # at this stage, no data means probably the connection has been broken
                        broadcast(server_socket, sock, "Client (%s, %s) is offline\n" % addr) 

                # exception 
                except:
                    broadcast(server_socket, sock, "Client (%s, %s) is offline\n" % addr)
                    continue

    server_socket.close()
    
# broadcast chat messages to all connected clients
def broadcast (server_socket, sock, message):
    for socket in SOCKET_LIST:
        # send the message only to peer
        if socket != server_socket and socket != sock :
            try :
                socket.send(message)
            except :
                # broken socket connection
                socket.close()
                # broken socket, remove it
                if socket in SOCKET_LIST:
                    SOCKET_LIST.remove(socket)
 
if __name__ == "__main__":

    sys.exit(chat_server())     

cara pemakainnya di terminal ketikan 

$ python chat_server.py
Chat server started on port 9009
$ python chat_server.py
Chat server started on port 9009// server terminal
$ python chat_server.py
Chat server started on port 9009
Client (127.0.0.1, 48952) connected
Client (127.0.0.1, 48953) connected
Client (127.0.0.1, 48954) connected


// client 1 terminal
$ python chat_client.py localhost 9009
Connected to remote host. You can start sending messages
[Me] [127.0.0.1:48953] entered our chatting room
[Me] [127.0.0.1:48954] entered our chatting room
[Me] client 1
[('127.0.0.1', 48953)] client 2
[('127.0.0.1', 48954)] client 3
[Me] Client (127.0.0.1, 48954) is offline
[Me] 


// client 2 terminal
$ python chat_client.py localhost 9009
Connected to remote host. You can start sending messages
[Me] [127.0.0.1:48953] entered our chatting room
[Me] [127.0.0.1:48954] entered our chatting room
[Me] client 1
[('127.0.0.1', 48953)] client 2
[('127.0.0.1', 48954)] client 3
[Me] Client (127.0.0.1, 48954) is offline
[Me] 

// client 3 terminal
$ python chat_client.py localhost 9009
Connected to remote host. You can start sending messages
[('127.0.0.1', 48952)] client 1
[('127.0.0.1', 48953)] client 2
[Me] client 3
[Me] ^CTraceback (most recent call last):
  File "chat_client.py", line 52, in 
    sys.exit(chat_client())
  File "chat_client.py", line 30, in chat_client
    read_sockets, write_sockets, error_sockets = select.select(socket_list , [], [])
KeyboardInterrupt
nah kurang lebih begitu langsung perktekan aja :)