python socket简单使用(二)

服务端:

#server.py
#服务器
import socket
import time
import threading

# 创建socket对象
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# 监听端口:
# 参数是一个tuple
# 我们写的这个服务不是标准服务，所以用9999这个端口号
# 小于1024的端口号必须要有管理员权限才能绑定
# (地址，端口号)
s.bind(('127.0.0.1', 9999))
# 参数指定等待连接的最大数量
# Listen for connections made to the socket.
# The backlog argument specifies the maximum number of queued connections
# and should be at least 1; the maximum value is system-dependent (usually 5).
s.listen(5)
print('Waiting for connection...')

def tcplink(sock, addr):
    print('Accept new connection from %s:%s...' % addr)
    # 先给客户端发送一个welcome
    sock.send(b'Welcome!')
    while 1:
        # 每次接收的数据为1K
        data = sock.recv(1024)
        # 休息一下
        time.sleep(1)
        # 如果不是数据或退出指令
        if not data or data.decode('utf-8') == 'exit':
            break
        # 给客户端发送数据
        sock.send(('Hello, %s!' % data.decode('utf-8')).encode('utf-8'))
    # 关闭
    sock.close()
    print('Connection from %s:%s closed.' % addr)

while 1:
    #接收一个新连接
    sock,addr = s.accept()
    #创建新的线程来处理TCP连接
    t = threading.Thread(target = tcplink,args = (sock,addr))
    t.start()

客户端:

# 客户端
# client.py
import socket

# 创建socket对象
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
# 连接127.0.0.1
s.connect(('127.0.0.1',9999))
# 接收欢迎消息
print(s.recv(1024).decode("utf-8"))
for data in [b'Green',b'Shawn',b'Curry']:
    # 发送数据到服务端
    s.send(data)
    print(s.recv(1024).decode('utf-8'))
s.send(b'exit')
s.close()

如何运行:
终端1:

> python server.py

终端2:

> python client.py

运行结果:
终端1(服务器):

Waiting for connection...
Accept new connection from 127.0.0.1:61700...
Connection from 127.0.0.1:61700 closed.

终端2(客户端):

Welcome!
Hello, Green!
Hello, Shawn!
Hello, Curry!

来源：CSDN

作者：Curry Caesar

链接：https://blog.csdn.net/qq_43933657/article/details/104709965

标签

socket

python