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echo_select_bonus.py
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import socket
import sys
import select
# GLOBAL VARS
max_buff_len = 1500
port = 7777
class Client:
"""
class Client of tcp chat server
socket the socket connection with client
nick the nickname of the client
"""
def __init__(self, socket, nick):
"""
init CLient object
:param socket: the socket connection with client
:param nick: the nickname of the client, (default = socket addr:port)
"""
self.socket = socket
if nick is not None:
self.nick = nick
else:
addr, port = socket.getpeername()
self.nick = str(addr) + ":" + str(port)
def getsocket(self):
return self.socket
def getnick(self):
return str(self.nick)
def setsocket(self, socket):
self.socket = socket
def setnick(self, nick):
self.nick = nick
class Channel:
"""
class Channel of tcp chat server
id the id number of the channel
admin the administrator of the channel
clients the list of the channel connected clients
"""
def __init__(self, id, admin):
self.id = id
self.admin = admin
self.clients = [admin]
def getid(self):
return self.id
def getadmin(self):
return self.admin
def getclients(self):
return self.clients
def setid(self, id):
self.id = id
def setadmin(self, admin):
self.admin = admin
def addclient(self, client):
self.clients.append(client)
def delclient(self, client):
self.clients.remove(client)
def ismember(self, client):
return self.clients.count(client) != 0
def isadmin(self, client):
return self.admin == client
class Server:
def __init__(self, socket):
self.socket = socket.getsocket()
self.clients = [socket]
self.channels = {}
def getsocket(self):
return self.socket
def getclients(self):
return self.clients
def getclient(self, nick):
for c in self.clients:
if c.getnick() == nick:
return c
return None
def getchannels(self):
return self.channels
def getclientchannels(self, client):
ret = []
for key in self.channels:
if self.channels[key].ismember(client):
ret.append(self.channels[key])
return ret
def iscotochannel(self, client, id):
if id.isnumeric():
if self.chanexist(id):
return self.getclients()[id].ismember(client)
else:
self.send(client, "channel {} doesn't exit".format(id))
else:
self.send(client, "channel id isn't a numeric value")
return False
def addchannel(self, channel):
print("channel created => channel {}".format(channel.getid()))
self.channels[channel.getid()] = channel
def delchannel(self, channel):
del self.channels[channel.getid()]
def addclient(self, client):
self.clients.append(client)
def delclient(self, client):
chnls = self.getclientchannels(client)
for ch in chnls:
self.channels[ch.getid()].delclient(client)
self.clients.remove(client)
def chanexist(self, id):
return self.getchannels().get(id) is not None
def send(self, client, msg):
client.getsocket().sendall("[server] {}\n".format(msg).encode("utf-8"))
def disconnect(server, client, msg, broadcast):
"""
disconnect a client from the server and send a message to all other clients
:param server: server object
:param client: client to disconnect
:param msg: array containing all words of the message
:param broadcast: specify if msg will be send to all client or not
:return: list without the disconnected Client object
"""
if broadcast:
for oc in server.getclients():
if oc.getsocket() != server.getsocket() and oc != client:
if len(msg) == 0:
oc.getsocket().sendall("client \"{}\" disconnected\n".format(client.getnick()).encode("utf-8"))
else:
oc.getsocket().sendall("[{}] {}\n".format(client.getnick(), msg).encode("utf-8"))
else:
if len(msg) == 0:
client.getsocket().sendall(
"You have been disconnected from the server\n".encode("utf-8"))
else:
client.getsocket().sendall("{}\n".format(msg).encode("utf-8"))
server.delclient(client)
client.getsocket().close()
print("client disconnected \"{}\"".format(client.getnick()))
return server.getclients()
def tcp_serv(port):
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
try:
server.bind(('', port))
except Exception as e:
print(e)
exit(1)
serv = Server(Client(server, "server"))
server.listen(10)
try:
while True:
inputs = serv.getclients()
r_list, w_list, x_list = select.select([x.getsocket() for x in inputs], [], [])
for t in r_list:
current_client = None
for cs in inputs:
if cs.getsocket() is t:
current_client = cs
if t is server:
# accept client connection & add client object to client list
client, addr = t.accept()
cli = Client(client, None)
print("client connected {}".format(cli.getnick()))
client.setblocking(0)
serv.addclient(cli)
else:
# data reception
payload = t.recv(max_buff_len)
if payload != b"":
cmd = payload.decode().split()
try:
data = ""
# command match cases
if cmd[0].upper() == "MSG":
if len(cmd) >= 2:
if cmd[1].isnumeric():
if len(serv.getclientchannels(current_client)) != 0:
# send message to all sockets except socket source
for oc in serv.getchannels()[eval(cmd[1])].getclients():
# concatenate all msg and send data
if oc.getsocket() != server and oc.getsocket() != t:
for i in range(len(cmd)):
if i > 1 and serv.getchannels()[eval(cmd[1])] \
.ismember(current_client):
if i == 2:
# put name at line beginning
data = "[{}] ".format(current_client.getnick())
data = data + cmd[i]
else:
data = data + " " + cmd[i]
data = data + "\n"
oc.getsocket().sendall(data.encode("utf-8"))
else:
serv.send(current_client, "you are not connected to a channel, please "
"connect using JOIN before trying to talk")
else:
serv.send(current_client, "bad command usage\nUsage: MSG <channel> <msg>")
else:
serv.send(current_client, "bad command usage\nUsage: MSG <channel> <msg>")
elif cmd[0].upper() == "NICK":
# change name of current client
for i in range(len(cmd)):
if i != 0:
if i == 1:
data = cmd[i]
else:
data = data + " " + cmd[i]
current_client.setnick(data)
print("client \"{}\" => \"{}\"".format(current_client.getsocket().getpeername(),
current_client.getnick()))
elif cmd[0].upper() == "WHO":
# send all connected client names to current client
for oc in inputs:
if oc.getsocket() is not server:
data += oc.getnick() + " "
serv.send(current_client, data)
elif cmd[0].upper() == "QUIT":
msg = ""
for i in range(len(cmd)):
if i != 0:
msg += " " + cmd[i]
inputs = disconnect(serv, current_client, msg, True)
elif cmd[0].upper() == "KILL":
if len(cmd) >= 2:
msg = "[{}] ".format(current_client.getnick())
print(len(cmd))
for i in range(len(cmd)):
print(i)
if i > 1:
if i != len(cmd):
msg += cmd[i] + " "
else:
msg += cmd[i]
for oc in inputs:
if oc.getnick() == cmd[1]:
ctodisc = oc
inputs = disconnect(serv, ctodisc, msg, False)
else:
serv.send(current_client, "command bad usage\nUsage: KILL <nick> <message>")
elif cmd[0].upper() == "JOIN":
if len(cmd) != 1:
if serv.chanexist(eval(cmd[1])):
serv.getchannels().get(eval(cmd[1])).addclient(current_client)
else:
serv.addchannel(Channel(eval(cmd[1]), current_client))
else:
serv.send(current_client, "command bad usage\nUsage: JOIN <channel>")
elif cmd[0].upper() == "PART":
if len(cmd) != 1:
if serv.chanexist(eval(cmd[1])):
serv.getchannels().get(eval(cmd[1])).delclient(current_client)
print("client {} leave channel {}".format(current_client.getnick(), cmd[1]))
else:
serv.send(current_client, "channel doesn't exist")
else:
serv.send(current_client, "command bad usage\nUsage: PART <channel>")
elif cmd[0].upper() == "LIST":
if len(serv.getchannels()) != 0:
data = "channels :\n"
for key in serv.getchannels():
data += "\tchannel {}\n".format(serv.getchannels()[key].getid())
serv.send(current_client, data)
else:
serv.send(current_client, "no channel opened")
elif cmd[0].upper() == "KICK":
cli_cnls = serv.getclientchannels(current_client)
ctokick = serv.getclient(cmd[1])
for ch in cli_cnls:
if ch.isadmin(current_client):
if ch.ismember(ctokick):
serv.getchannels()[ch.getid()].delclient(ctokick)
serv.send(ctokick, "you have been kicked from channel {}"
.format(ch.getid()))
else:
serv.send(current_client, "you cannot kick clients that aren't "
"in same channel as you")
else:
serv.send(current_client,
"you must be administrator of the channel to kick clients")
else:
serv.send(current_client, "Invalid command")
except IndexError:
continue
else:
inputs = disconnect(serv, current_client, "", True)
except KeyboardInterrupt:
exit(1)
tcp_serv(port)