|
1
|
|
|
import select |
|
2
|
|
|
import socket |
|
3
|
|
|
|
|
4
|
|
|
HEADER_LENGTH = 10 |
|
5
|
|
|
|
|
6
|
|
|
|
|
7
|
|
|
def receive_message(client_socket_): |
|
8
|
|
|
try: |
|
9
|
|
|
message_header = client_socket_.recv(HEADER_LENGTH) |
|
10
|
|
|
if not len(message_header): |
|
11
|
|
|
return False |
|
12
|
|
|
|
|
13
|
|
|
message_length = int(message_header.decode('utf-8').strip()) |
|
14
|
|
|
return { |
|
15
|
|
|
"header": message_header, |
|
16
|
|
|
"data": client_socket_.recv(message_length) |
|
17
|
|
|
} |
|
18
|
|
|
|
|
19
|
|
|
except Exception as e: |
|
20
|
|
|
print(e) |
|
21
|
|
|
return False |
|
22
|
|
|
|
|
23
|
|
|
|
|
24
|
|
|
def start(ip, port): |
|
25
|
|
|
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) |
|
26
|
|
|
server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) |
|
27
|
|
|
|
|
28
|
|
|
server_socket.bind((ip, port)) |
|
29
|
|
|
server_socket.listen() |
|
30
|
|
|
|
|
31
|
|
|
print("server started") |
|
32
|
|
|
socket_list = [server_socket] |
|
33
|
|
|
clients = {} |
|
34
|
|
|
|
|
35
|
|
|
while True: |
|
36
|
|
|
run_cycle(server_socket, socket_list, clients) |
|
37
|
|
|
|
|
38
|
|
|
|
|
39
|
|
|
def register_user_connection(server_socket, socket_list, clients): |
|
40
|
|
|
client_socket, client_address = server_socket.accept() |
|
41
|
|
|
|
|
42
|
|
|
user = receive_message(client_socket) |
|
43
|
|
|
|
|
44
|
|
|
if not user: |
|
45
|
|
|
return |
|
46
|
|
|
|
|
47
|
|
|
socket_list.append(client_socket) |
|
48
|
|
|
clients[client_socket] = user |
|
49
|
|
|
|
|
50
|
|
|
print( |
|
51
|
|
|
f"Accepted new connection from {client_address[0]}:" |
|
52
|
|
|
f"{client_address[1]} username: {user['data'].decode('utf-8')}" |
|
53
|
|
|
) |
|
54
|
|
|
|
|
55
|
|
|
|
|
56
|
|
|
def remove_user_connection(clients, notified_socket, socket_list): |
|
57
|
|
|
print( |
|
58
|
|
|
"Closed connection from", |
|
59
|
|
|
clients[notified_socket]['data'].decode('utf-8') |
|
60
|
|
|
) |
|
61
|
|
|
|
|
62
|
|
|
socket_list.remove(notified_socket) |
|
63
|
|
|
clients.pop(notified_socket) |
|
64
|
|
|
return |
|
65
|
|
|
|
|
66
|
|
|
|
|
67
|
|
|
def send_message_to(client_socket, user, message): |
|
68
|
|
|
client_socket.send( |
|
69
|
|
|
user["header"] + user["data"] + message['header'] + message["data"] |
|
70
|
|
|
) |
|
71
|
|
|
|
|
72
|
|
|
|
|
73
|
|
|
def broadcast_message(clients, notified_socket, user, message): |
|
74
|
|
|
for client_socket in clients: |
|
75
|
|
|
if client_socket != notified_socket: |
|
76
|
|
|
send_message_to(client_socket, user, message) |
|
77
|
|
|
|
|
78
|
|
|
|
|
79
|
|
|
def handle_message(clients, notified_socket, message): |
|
80
|
|
|
user = clients[notified_socket] |
|
81
|
|
|
print( |
|
82
|
|
|
f"receive_message from {user['data'].decode('utf-8')}:", |
|
83
|
|
|
message['data'].decode('utf-8') |
|
84
|
|
|
) |
|
85
|
|
|
|
|
86
|
|
|
broadcast_message(clients, notified_socket, user, message) |
|
87
|
|
|
|
|
88
|
|
|
|
|
89
|
|
|
def handle_notified_socket(clients, notified_socket, socket_list): |
|
90
|
|
|
message = receive_message(notified_socket) |
|
91
|
|
|
|
|
92
|
|
|
if not message: |
|
93
|
|
|
remove_user_connection(clients, notified_socket, socket_list) |
|
94
|
|
|
return |
|
95
|
|
|
|
|
96
|
|
|
handle_message(clients, notified_socket, message) |
|
97
|
|
|
|
|
98
|
|
|
|
|
99
|
|
|
def run_cycle(server_socket, socket_list, clients): |
|
100
|
|
|
read_sockets, _, exception_sockets = select.select( |
|
101
|
|
|
socket_list, [], socket_list |
|
102
|
|
|
) |
|
103
|
|
|
|
|
104
|
|
|
for notified_socket in read_sockets: |
|
105
|
|
|
if notified_socket == server_socket: |
|
106
|
|
|
register_user_connection(server_socket, socket_list, clients) |
|
107
|
|
|
|
|
108
|
|
|
else: |
|
109
|
|
|
handle_notified_socket(clients, notified_socket, socket_list) |
|
110
|
|
|
|
|
111
|
|
|
for notified_socket in exception_sockets: |
|
112
|
|
|
socket_list.remove(notified_socket) |
|
113
|
|
|
clients.pop(notified_socket) |
|
114
|
|
|
|
Sigmanificient /
PyTchat
