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ChatServer.py
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ChatServer.py
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import socket
import sys
import threading
import Channel
from Client import Client
from Serialization import Serialization
class Server:
SERVER_CONFIG = {"MAX_CONNECTIONS": 15}
HELP_MESSAGE = """\n> The list of commands available are:
/help - Show the instructions
/join [channel_name] - To create or switch to a channel.
/quit - Exits the program.
/list - Lists all available channels.\n\n""".encode('utf8')
def __init__(self, host=socket.gethostbyname('localhost'), port=50000, allowReuseAddress=True):
self.address = (host, port)
self.channels = {} # Channel Name -> Channel
self.serializer = Serialization()
self.channels_client_map = {} # Client Name -> Channel Name
try:
self.serverSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
except socket.error as errorMessage:
sys.stderr.write("Failed to initialize the server. Error - %s\n", str(errorMessage))
raise
if allowReuseAddress:
self.serverSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
try:
self.serverSocket.bind(self.address)
except socket.error as errorMessage:
sys.stderr.write('Failed to bind to ' + self.address + '. Error - %s\n', str(errorMessage))
raise
def listen_thread(self, defaultGreeting="\n> Welcome to our chat app!!! What is your name?\n"):
while True:
print("Waiting for a client to establish a connection\n")
#Accept connection, returns tuple
clientSocket, clientAddress = self.serverSocket.accept()
client = Client(clientSocket)
# Authorize user
client = self.serializer.authorize_client(client)
# client was returned with None
while client is None:
# Repeat until the is an authenticated or new client
client = self.serializer.authorize_client(client)
print(client.get_clientName())
print(client.get_clientPassword())
print(client.get_levels())
print(str(client.get_status()))
#Stablish connection
print("Connection established with IP address {0} and port {1}\n".format(clientAddress[0], clientAddress[1]))
clientThread = threading.Thread(target=self.client_thread, args=(client,))
clientThread.start()
def start_listening(self):
self.serverSocket.listen(Server.SERVER_CONFIG["MAX_CONNECTIONS"])
listenerThread = threading.Thread(target=self.listen_thread)
listenerThread.start()
listenerThread.join()
def client_thread(self, client, size=4096):
welcomeMessage = '> Welcome %s, type /help for a list of helpful commands.\n\n' % client.get_clientName()
client.send_message(welcomeMessage)
while True:
chatMessage = client.receive_message(size)
if not chatMessage:
break
if '/quit' in chatMessage:
self.quit(client.get_socket(), client.get_clientName())
break
elif '/list' in chatMessage:
self.list_all_channels(client.get_clientSocket())
elif '/help' in chatMessage:
self.help(client.get_clientSocket())
elif '/join' in chatMessage:
self.join(chatMessage, client)
elif '/away' in chatMessage:
self.away(client, chatMessage)
elif '/info' in chatMessage:
self.info(client.get_clientSocket())
elif '/ison' in chatMessage:
query = self.ison(chatMessage)
if query == []:
client.send_message("\n>None of the nickname/s are connected in the network\n")
else:
for name in query:
client.send_message("\n>" + name + " is connected.\n")
elif '/kick' in chatMessage:
self.kick(client, chatMessage)
elif '/kill' in chatMessage:
self.kill(client, chatMessage)
elif '/privmsg' in chatMessage:
self.privmsg(client, chatMessage)
elif '/invite' in chatMessage:
self.invite(client, chatMessage)
elif '/mode' in chatMessage:
self.mode(client, chatMessage)
elif '/nick' in chatMessage:
self.nick()
else:
self.send_message(client.get_clientSocket(), chatMessage + '\n' , client.get_clientName())
client.get_socket().close()
def privmsg(self, client, chatMessage):
args_list = chatMessage.split()
msg_target = args_list[1]
message = args_list[2]
self.channels[self.channels_client_map[msg_target]].broadcast_message(message, msg_target)
def mode(self, client , chatMessage):
args_list = chatMessage.split()
if len(args_list) >= 3:
flag = args_list[2]
#mode change user flag -u must be set
if flag == "-u":
pass
elif flag == "-c":
pass
def get_all_channelName(self):
result = []
for channel in self.channels:
result.append(channel)
return result
def invite(self, client, chatMessage):
arg_list = chatMessage.split()
if len(arg_list) >= 2:
msgtarget = arg_list[1]
channel = arg_list[2]
if channel in self.channels:
if channel.get_mode() == True:
if client.get_levels() == "channelop" or client.get_levels() == "admin":
self.join(msgtarget)
else:
client.send_message("\n>Invite Incomplete. Not a channel operator.\n")
else:
if client.get_clientName() in self.channels_client_map:
target_client = self.find_client_target(msgtarget)
target_client.send_message("\n>" + client.get_clientName() + " has invited you to a channel. Leaving your channel.\n")
self.join(target_client)
else:
target_client_object = self.find_client_target(msgtarget)
self.join_invite(target_client_object, channel)
self.join_invite(client, channel)
else:
client.send_message("\n>Command Usage Error.\n\n>/invite msg_target channel \n")
def join_invite(self, client, channelName):
isInSameRoom = False
if client.get_clientName() in self.channels_client_map:
if channelName in self.channels_client_map[client.client.get_clientName()]:
# User already on that channel
client.send_message("\n> You are already in channel: " + channelName)
isInSameRoom = True
elif not channelName in self.channels_client_map[client.client.get_clientName()] and channelName in self.channels:
self.channels[channelName].clients[client.get_clientName()] = client
self.channels_client_map[client.get_clientName()].append(channelName)
if not isInSameRoom:
if not channelName in self.channels:
newChannel = Channel.Channel(channelName)
self.channels[channelName] = newChannel
self.channels[channelName].clients[client.get_clientName()] = client
self.channels[channelName].welcome_client(client.get_clientName())
self.channels_client_map[client.get_clientName()].append(channelName)
'''
Find_client_target is a function that find the msgtarget if the user is connected.
If given the clientName. returns None if client was not found.
'''
def find_client_target(self, msgtarget):
if msgtarget in self.channels_client_map:
return self.channels[self.channels_client_map[msgtarget]]
return None
def kick(self, client , chatMessage):
if client.get_levels() == "channelop" or client.get_levels() == "admin":
args = chatMessage[5:]
list_args = args.split()
channelName = list_args[0]
clientName = list_args[1]
message = list_args[2]
if clientName in self.channels[channelName].clients:
del self.channels[channelName].clients[clientName]
client.send_message(message)
def kill(self, client , chatMessage):
if client.get_levels() == "channelop" or client.get_levels() == "admin":
args_list = chatMessage.split()
clientName = args_list[1]
message = args_list[2]
if clientName in self.channels_client_map:
self.channels[self.channels_client_map[clientName]].clients[clientName].send_message(message)
del self.channels[self.channels_client_map[clientName]].clients[clientName]
del self.channels_client_map[clientName]
def ison(self, chatMessage):
nicknames = chatMessage[6:]
nicknames_list = nicknames.split()
query = []
for name in nicknames_list:
if name in self.channels_client_map:
query.append(name)
return query
"""
Information of the server. Program only uses one
server. Add information about the server.
"""
def info(self, clientSocket):
self.serializer.read_ServerConfigInfo(clientSocket)
def away(self, client, chatMessage):
PRIVAWAAYMSG = chatMessage[5:]
if PRIVAWAAYMSG is "":
client.set_away(False)
if client.get_away() == False and PRIVAWAAYMSG:
client.set_away(True)
client.set_awayMessage(PRIVAWAAYMSG)
#Kill the server, any user can
#TO DO - FIX
def die(self, clientSocket):
self.server_shutdown()
def quit(self, clientSocket, clientName):
clientSocket.sendall('/quit'.encode('utf8'))
self.remove_client(clientName)
def list_all_channels(self, clientSocket):
if len(self.channels) == 0:
chatMessage = "\n> No rooms available. Create your own by typing /join [channel_name]\n"
clientSocket.sendall(chatMessage.encode('utf8'))
else:
chatMessage = '\n\n> Current channels available are: \n'
for channel in self.channels:
chatMessage += " \n" + channel + ": " + str(len(self.channels[channel].clients)) + " user(s)"
chatMessage += "\n"
clientSocket.sendall(chatMessage.encode('utf8'))
def help(self, socket):
socket.sendall(Server.HELP_MESSAGE)
def join(self, chatMessage, client):
isInSameRoom = False
if len(chatMessage.split()) >= 2:
channelName = chatMessage.split()[1]
if client.get_clientName() in self.channels_client_map:
if channelName in self.channels_client_map[client.client.get_clientName()]:
# User already on that channel
client.send_message("\n> You are already in channel: " + channelName)
isInSameRoom = True
elif not channelName in self.channels_client_map[
client.client.get_clientName()] and channelName in self.channels:
self.channels[channelName].clients[client.get_clientName()] = client
self.channels_client_map[client.get_clientName()].append(channelName)
if not isInSameRoom:
if not channelName in self.channels:
newChannel = Channel.Channel(channelName)
self.channels[channelName] = newChannel
self.channels[channelName].clients[client.get_clientName()] = client
self.channels[channelName].welcome_client(client.get_clientName())
self.channels_client_map[client.get_clientName()].append(channelName)
else:
self.help(client.get_clientSocket())
def send_message(self, clientSocket, chatMessage, clientName):
if clientName in self.channels_client_map:
self.channels[self.channels_client_map[clientName]].broadcast_message(chatMessage, clientName + ": ")
else:
chatMessage = """\n> You are currently not in any channels:
Use /list to see a list of available channels.
Use /join [channel name] to join a channels.\n\n""".encode('utf8')
clientSocket.sendall(chatMessage)
def remove_client(self, clientName):
if clientName in self.channels_client_map:
self.channels[self.channels_client_map[clientName]].remove_client_from_channel(clientName)
del self.channels_client_map[clientName]
print("Client: " + clientName + " has left\n")
def server_shutdown(self):
print("Shutting down chat server.\n")
self.serverSocket.shutdown(socket.SHUT_RDWR)
self.serverSocket.close()
def main():
chatServer = Server()
print("\nListening on port " + str(chatServer.address[1]))
print("Waiting for connections...\n")
chatServer.start_listening()
chatServer.server_shutdown()
if __name__ == "__main__":
main()