-
Notifications
You must be signed in to change notification settings - Fork 0
/
select_server.py
51 lines (43 loc) · 1.34 KB
/
select_server.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
"""
基于 select 方法的 IO多路复用网络并发
重点代码 !!!
"""
from socket import *
from select import select
# 创建好监听套接字
sockfd = socket()
sockfd.bind(('0.0.0.0',8888))
sockfd.listen(5)
# 与非阻塞IO配合防止传输过程阻塞
sockfd.setblocking(False)
# 准备IO进行监控
rlist = [sockfd]
wlist = []
xlist = []
# 循环监控IO发生
while True:
# 开始监控IO
rs,ws,xs = select(rlist,wlist,xlist)
# 伴随监控的IO的增多,就绪的IO情况也会复杂
# 分类讨论 分两类 sockfd(监听套接字,客户端链接了就能触发监听套接字) -- connfd(客户端链接套接字)
for r in rs:
# 有客户端连接
if r is sockfd:
connfd,addr = r.accept()
print("Connect from",addr)
connfd.setblocking(False)
rlist.append(connfd) # 增加监控,禁止 if 内部写死循环
else:
# 某个客户端发消息给我
data = r.recv(1024).decode()
if not data:
# 客户端退出
rlist.remove(r) # 移除监控
r.close()
continue
print("收到:",data)
# r.send(b'ok')
wlist.append(r)
for w in ws:
w.send(b'OK')
wlist.remove(w) # 如果不移除会一直就绪发送