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import sfml.network as sf
# python 2.* compatability
try: input = raw_input
except NameError: pass
def run_tcp_server():
""" Launch a server. The server waits for an incoming connection,
sends a message and waits for the answer. """
try:
# create a server socket to accept new connections
listener = sf.TcpListener()
# listen to the given port for incoming connections
listener.listen(PORT)
print("Server is listening to port {0}, waiting for connections...".format(PORT))
# wait for a connection
socket = listener.accept()
print("Client connected: {0}".format(socket.remote_address))
# send a message to the connected client
message = "Hi, I'm the server"
socket.send(message.encode('utf-8'))
print("Message sent to the client: {0}".format(message))
# recieve a message back from the client
answer = socket.receive(128).decode('utf-8')
print("Answer received from the client: {0}".format(answer))
except sf.SocketException as error:
print("An error occured!")
print(error)
return
def run_tcp_client():
""" Create a client. The client is connected to a server, displays
the welcome message and sends an answer. """
server = input("Type the address or name of the server to connect to: ")
server = sf.IpAddress.from_string(server)
# create a socket for communicating with the server
socket = sf.TcpSocket()
# connect to the server
try:
socket.connect(server, PORT)
print("Connected to server {0}".format(server))
# receive a message from the server
message = socket.receive(128).decode('utf-8')
print("Message received from the server: {0}".format(message))
# send an answer to the server
answer = "Hi, I'm a client"
socket.send(answer.encode('utf-8'))
print("Message sent to the server: {0}".format(answer))
except sf.SocketException as error:
print("An error occured!")
print(error)
return
def run_udp_server():
""" Launch a server. The server waits for a message then sends an
answer. """
# create a socket to receive a message from anyone
socket = sf.UdpSocket()
try:
# listen to messages on the specified port
socket.bind(PORT)
print("Server is listening to port {0}, waiting for message...".format(PORT))
# wait for a message
message, ip, port = socket.receive(128)
print("Message received from client {0}: {1}".format(ip, message.decode('utf-8')))
# send an answer to the client
answer = "Hi, I'm the server"
socket.send(answer.encode('utf-8'), ip, port)
print("Message sent to the client: {0}".format(answer))
except sf.SocketException as error:
print("An error occured!")
print(error)
return
def run_udp_client():
""" Send a message to the server, wait for the answer. """
# ask for the server address
server = input("Type the address or name of the server to connect to: ")
server = sf.IpAddress.from_string(server)
# create a socket for communicating with the server
socket = sf.UdpSocket()
try:
# send a message to the server
message = "Hi, I'm a client"
socket.send(message.encode('utf-8'), server, PORT)
print("Message sent to the server: {0}".format(message))
# receive an answer from anyone (but most likely from the server)
answer, ip, port = socket.receive(128)
print("Message received from {0}: {1}".format(ip, answer.decode('utf-8')))
except sf.SocketException as error:
print("An error occured!")
print(error)
return
if __name__ == "__main__":
# choose an arbitrary port for opening sockets
PORT = 50001
# TCP or UDP ?
print("Do you want to use TCP (t) or UDP (u) ?")
protocol = input()
# client or server ?
print("Do you want to be a server (s) or a client (c) ?")
who = input()
if protocol == 't':
if who == 's': run_tcp_server()
else: run_tcp_client()
else:
if who == 's': run_udp_server()
else: run_udp_client()
input("Press any key to exit...")
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