GNU nano 2.0.6            File: chat_server.py                                

              # Tcp Chat server

 

import socket, select

 

#Function to broadcast chat messages to all connected clients

def broadcast_data (sock, message):

    #Do not send the message to master socket and the client who has send us the message

    for socket in CONNECTION_LIST:

        if socket != server_socket and socket != sock :

            try :

                socket.send(message)

            except :

                # broken socket connection may be, chat client pressed ctrl+c for example

                socket.close()

                CONNECTION_LIST.remove(socket)

 

if __name__ == "__main__":

     

    # List to keep track of socket descriptors

    CONNECTION_LIST = []

    RECV_BUFFER = 4096 # Advisable to keep it as an exponent of 2

    PORT = 5432

     

    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    # this has no effect, why ?

    server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

    server_socket.bind(("0.0.0.0", PORT))

    server_socket.listen(10)

 

    # Add server socket to the list of readable connections

    CONNECTION_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

        read_sockets,write_sockets,error_sockets = select.select(CONNECTION_LIST,[],[])

 

        for sock in read_sockets:

            #New connection

            if sock == server_socket:

                # Handle the case in which there is a new connection recieved through server_socket

                sockfd, addr = server_socket.accept()

                CONNECTION_LIST.append(sockfd)

                print "Client (%s, %s) connected" % addr

                 

                broadcast_data(sockfd, "[%s:%s] entered room\n" % addr)

             

            #Some incoming message from a client

            else:

                # Data recieved from client, process it

                try:

                    #In Windows, sometimes when a TCP program closes abruptly,

                    # a "Connection reset by peer" exception will be thrown

                    data = sock.recv(RECV_BUFFER)

                    if data:

                        broadcast_data(sock, "\r" + '<' + str(sock.getpeername()) + '> ' + data)                

                 

                except:

                    broadcast_data(sock, "Client (%s, %s) is offline" % addr)

                    print "Client (%s, %s) is offline" % addr

                    sock.close()

                    CONNECTION_LIST.remove(sock)

                    continue

     
    server_socket.close()

    

# telnet program example
import socket, select, string, sys
 
def prompt() :
    sys.stdout.write('<You> ')
    sys.stdout.flush()
 
#main function
if __name__ == "__main__":
     
    if(len(sys.argv) < 3) :
        print 'Usage : python telnet.py hostname port'
        sys.exit()
     
    host = sys.argv[1]
    port = int(sys.argv[2])
     
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.settimeout(2)
     
    # connect to remote host
    try :
        s.connect((host, port))
    except :
        print 'Unable to connect'
        sys.exit()
     
    print 'Connected to remote host. Start sending messages'
    prompt()
     
    while 1:
        socket_list = [sys.stdin, s]
         
        # Get the list sockets which are readable
        read_sockets, write_sockets, error_sockets = select.select(socket_list , [], [])
         
        for sock in read_sockets:
            #incoming message from remote server
            if sock == s:
                data = sock.recv(4096)
                if not data :
                    print '\nDisconnected from chat server'
                    sys.exit()
                else :
                    #print data
                    sys.stdout.write(data)
                    prompt()
             
            #user entered a message
            else :
                msg = sys.stdin.readline()
                s.send(msg)
                prompt()

(Mar-30-2017, 07:45 PM)abrew132 Wrote: idk why it did size x= small... just the forum did that thats not part of the code.