python socket编程 tcp 简单示例

SOCKET基础编程

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功能说明

• python版本3.5.1
• 客户端连接服务器，server发送欢迎词并询问用户姓名，收到client回复，向client发送‘hello，***’
• client向server发送数据，server打印收到的数据
• 用线程处理多客户端连接

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Client

• demo_socket_client.py

import socket

# client
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  #AF_INET（IPV4使用） SOCK_STREAM（TCP模式）

client.connect(('localhost', 8080))         #连接本地回环地址127.0.0.1 端口号8080 以元组作为参数

print(client.recv(1024).decode('utf-8'))

while True:
    sendbuf = input()                      # 输入
    client.send(sendbuf.encode('utf-8'))   # UTF-8编码
if not sendbuf or sendbuf == 'exit':   #退出条件判断
break
    recvbuf = client.recv(1024)
print(recvbuf.decode('utf-8'))        # 解码
client.close()                            # 断开连接
print('Connection was closed...')

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客户端运行截图

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Server

• demo_socket_server.py

import socket
import threading
import time

ser = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

ser.bind(('127.0.0.1', 8080))

ser.listen(5)               # 监听连接 如果有超过5个连接请求，从第6个开始不会被accept

print('Server is running...')       # 打印运行提示

def tcplink(connect, addr):
print('Accept new connection from %s:%s...' % addr)
connect.send(b'Welcome!\r\n'+b'Please tell me your name:')
    data = connect.recv(1024)
connect.send(('Hello, %s' % data.decode('utf-8')).encode('utf-8'))
while True:
        data = connect.recv(1024)
time.sleep(1)
if not data or data.decode('utf-8') == 'exit':
break
print("Device: %s, Data: %s, Size: %s" % (addr[0], data.decode('utf-8'), len(data)))
connect.send(b'Data Receive')
connect.close()
print('Connection from %s:%s closed' % addr)

while True:
    sock, addr = ser.accept()
    pthread = threading.Thread(target=tcplink, args=(sock, addr))   #多线程处理socket连接
    pthread.start()

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服务器运行截图

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