python利用socket建立通讯

链接+循环 通信 服务端常驻

server端

import socket
phone=socket.socket()#买手机
phone.bind(('127.0.0.1',6666))#绑卡
phone.listen(5)#设置连接数一个连接加5个等待 缓存池
while 1:
    conn,addr=phone.accept()
    print(f'用户{addr}来了')
    while 1:
        try:
            from_client_data=conn.recv(1024)
            if from_client_data.decode('utf-8')=='Q':
                print('正常断开')
                break
            print(f'来自客户端{addr}消息{from_client_data.decode("utf-8")}')
            to_client_data=input('>>>>>>>')
            conn.send(to_client_data.encode('utf-8'))
        except Exception:
            break
    conn.close()
phone.close()

client端

# 自己的
import socket
phone=socket.socket()
phone.connect(('127.0.0.1',6666))
while 1:
    to_server_data=input('>>>>>>q退出')
    if not to_server_data:
        print('不可以输入空')
        continue
    phone.send(to_server_data.encode('utf-8'))#因为不可以让他发空 所以放在判断下
    if to_server_data.upper()=='Q':
        break
    from_server_data=phone.recv(1024)
    print(f'来自客户端消息{from_server_data.decode("utf-8")}')
phone.close()

执行远端命令

server端

# 用到的模块
import subprocess
# import subprocess
# obj = subprocess.Popen('系统命令',
#                        shell=True,
#                        stdout=subprocess.PIPE,
#                        stderr=subprocess.PIPE,
#                        )
# print(obj.stdout.read().decode('gbk'))  # 正确命令
# print(obj.stderr.read().decode('gbk'))  # 错误命令
# 错误的是空字符串

import socket
import subprocess
phone = socket.socket()

phone.bind(('127.0.0.1',8848))

phone.listen(2)
while 1:
    conn,addr = phone.accept()  # 等待客户端链接我,阻塞状态中
    print(f'链接来了: {conn,addr}')
    while 1:
        try:
            from_client_data = conn.recv(1024)  # 最多接受1024字节
            if from_client_data.upper() == b'Q':
                print('客户端正常退出聊天了')
                break
            obj = subprocess.Popen(from_client_data.decode('utf-8'),
                                   shell=True,
                                   stdout=subprocess.PIPE,
                                   stderr=subprocess.PIPE,
                                   )
            result = obj.stdout.read() + obj.stderr.read()

            conn.send(result)
        except ConnectionResetError:
            print('客户端链接中断了')
            break
    conn.close()
phone.close()

client端

# 用到的模块
import subprocess
# import subprocess
# obj = subprocess.Popen('系统命令',
#                        shell=True,
#                        stdout=subprocess.PIPE,
#                        stderr=subprocess.PIPE,
#                        )
# print(obj.stdout.read().decode('gbk'))  # 正确命令
# print(obj.stderr.read().decode('gbk'))  # 错误命令
# 错误的是空字符串

import socket
import subprocess
phone = socket.socket()

phone.bind(('127.0.0.1',8848))

phone.listen(2)
while 1:
    conn,addr = phone.accept()  # 等待客户端链接我,阻塞状态中
    print(f'链接来了: {conn,addr}')
    while 1:
        try:
            from_client_data = conn.recv(1024)  # 最多接受1024字节
            if from_client_data.upper() == b'Q':
                print('客户端正常退出聊天了')
                break
            obj = subprocess.Popen(from_client_data.decode('utf-8'),
                                   shell=True,
                                   stdout=subprocess.PIPE,
                                   stderr=subprocess.PIPE,
                                   )
            result = obj.stdout.read() + obj.stderr.read()

            conn.send(result)
        except ConnectionResetError:
            print('客户端链接中断了')
            break
    conn.close()
phone.close()

利用udp建立通讯

server端

import socket

udp_server = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)  # 基于网络,udp协议的socket

udp_server.bind(('127.0.0.1', 9000))#绑卡

while 1:
    from_client_data = udp_server.recvfrom(1024)#接收 前面消息 后面是ip端口
    print(f'来自{from_client_data[1]}的消息:{from_client_data[0].decode("utf-8")}')
    to_client_data = input('>>>').strip()
    udp_server.sendto(to_client_data.encode('utf-8'),from_client_data[1])

client端

import socket

udp_client = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)  # 基于网络,udp协议的socket

while 1:
    to_server_data = input('>>>').strip()
    udp_client.sendto(to_server_data.encode('utf-8'),('127.0.0.1', 9000))
    from_server_data = udp_client.recvfrom(1024)#发送端 端口不知道
    print(f'来自{from_server_data[1]}的消息:{from_server_data[0].decode("utf-8")}')

转载于:https://www.cnblogs.com/saoqiang/p/11377224.html