1 客户端输入命令，传输到服务端调用操作系统命令

客户端代码：

代码块
import socket

sk = socket.socket()

sk.connect_ex(('127.0.0.1',8080))

while 1:

    cmd = input('请输入一个命令>>>')

    sk.send(cmd.encode('utf-8'))

    result = sk.recv(102400).decode('gbk')

    print(result)

sk.close()

服务端代码：

代码块
import socket

import subprocess

sk = socket.socket()

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

sk.listen()

conn,addr = sk.accept()

while 1:

    cmd = conn.recv(1024).decode('utf-8')

    r = subprocess.Popen(cmd,shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE)

    stdout = r.stdout.read()

    stderr = r.stderr.read()

    if stderr:

        conn.send(stderr)

    else:

        conn.send(stdout)

conn.close()

sk.close()

2 模拟ftp文件的上传下载

客户端：

代码块
import socket

import os

import json

sk = socket.socket()

sk.connect_ex(('127.0.0.1', 8080))  # 带返回值,如果出错,不会报错,会返回错误的编码

# sk.connect()# 会直接报错    两个都是连接服务器的功能

menu = {'1': 'upload', '2': 'download'}

for k, v in menu.items():

    print(k, v)

num = input('请输入功能选项:')

if num == '1':

    file_path = input('请输入一个文件的绝对路径>>>')

    # D:/sylar/python_workspace/day31/文件上传下载/__init__.py

    filename = os.path.basename(file_path)

    with open(file_path, 'r', encoding='utf-8') as f:

        content = f.read()

    dic = {'opt': menu.get(num), 'filename': filename, 'content': content}

    str_dic = json.dumps(dic)  # 把字典序列化，用来传输

    sk.send(str_dic.encode('utf-8'))  # 发射给服务器

sk.close()

服务端：

代码块
import socket

import json

sk = socket.socket()

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

sk.listen()

conn,addr = sk.accept()

str_dic = conn.recv(9090).decode('utf-8')    #接收客户端传输的数据

dic = json.loads(str_dic)    #解析数据，还原字典

# dic = {'opt':menu.get(num),'filename':filename,'content':content}

if dic['opt'] == 'upload':    #判断客户端手否输入的是upload

    # 上传

    filename = 'new' + dic['filename']      #写入新文件的名字

    with open(filename,'w',encoding='utf-8') as f:

        f.write(dic['content'])

conn.close()

sk.close()

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