1.基于多线程实现并发的套接字通信
server:
1 # -*- coding:utf-8 -*-
2 """基于多线程实现并发的套接字通信"""
3 """有一个致命的问题，不能无限的开线程，机器会卡死了"""
4 import socket
5 from threading import Thread
6
7 def task(conn):
8 while True:
9 try:
10 data = conn.recv(1024)
11 if not data: continue
12 conn.send(data.upper())
13 except Exception:
14 break
15 conn.close()
16
17 def server(ip,port):
18 server = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
19 server.bind((ip,port))
20 server.listen(5)
21 while True:
22 conn,addr = server.accept()
23 t = Thread(target=task,args=(conn,))
24 t.start()
25 server.close()
26
27 if __name__ == "__main__":
28 server('127.0.0.1',8080)
29
30 """应该将线程控制在一定的数量"""
31 """
32 进程池：。。。 io阻塞不用进程池了
33 线程池：。。。
34 """
35 """基于线程池实现："""
36 import socket
37 from threading import Thread,Semaphore
38 from concurrent.futures import ThreadPoolExecutor
39
40 def task(conn):
41 # sm.acquire()
42 while True:
43 try:
44 data = conn.recv(1024)
45 if not data: break
46 conn.send(data.upper())
47 except Exception:
48 break
49 conn.close()
50 # sm.release()
51
52 def server(ip,port):
53 server = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
54 server.bind((ip,port))
55 server.listen(5)
56 while True:
57 conn,addr = server.accept()
58 pool.submit(task,conn)
59 # t = Thread(target=task, args=(conn,))
60 # t.start()
61 server.close()
62
63
64 if __name__ == "__main__":
65 pool = ThreadPoolExecutor(2) # 随着机器性能不同而不同 一般用 线程池 不用 信号量
66 # sm = Semaphore(2)
67 server('127.0.0.1',8080)
client:
1 import socket
2
3 client = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
4 client.connect(('127.0.0.1',8080))
5 while True:
6 msg = input(">>>:").strip()
7 if not msg:continue
8 client.send(msg.encode('utf-8'))
9 data = client.recv(1024)
10 print(data.decode('utf-8'))
2.编写一个简单的文本处理工具，具备三个任务，一个接收用户输入，一个将用户输入的内容格式化成大写，一个将格式化后的结果存入文件
1 from threading import Thread
2 import json
3 import time
4
5 def save(msg_upper):
6 with open('db.txt','a',encoding='utf-8') as f:
7 json.dump(msg_upper,f)
8
9 def handle(msg):
10 time.sleep(10)
11 msg_upper = msg.upper()
12 p2 = Thread(target=save,args=(msg_upper,))
13 p2.start()
14
15 def recv():
16 while True:
17 msg = input('>>>:').strip()
18 p1 = Thread(target=handle, args=(msg,))
19 p1.start()
20
21 if __name__ == "__main__":
22 recv()
