文件的上传、下载结合用户认证并解决粘包问题

# 1.文件的上传、下载
# 2.结合用户认证
# 要求：
# 1.tcp协议粘包的问题，使用struct模块解决粘包问题
# 2.传递的所有的信息都尽量是json格式
# 3.再server端用上反射

server端

import os
import json
import time
import socket


def up():
    str_dic = conn.recv(1024).decode('utf-8')  # 接收str字典
    if str_dic == 'Q':
        return
    dic = json.loads(str_dic)  # 转换为字典
    print(dic)
    content = conn.recv(dic['filesize'])  # 接收字典中的文件大小项
    filebase = os.path.join(r'D:homeworkday29file', dic['filename'])
    with open(filebase, mode='wb') as f:  # 创建字典中文件名的项,模式为写字节
        f.write(content)


def download():
    a = os.listdir(r'D:homeworkday29file')       # 服务器上的文件的列表
    stra = json.dumps(a)        # 字符串列表
    conn.send(stra.encode('utf-8'))         # 发给client
    filename = conn.recv(1024).decode('utf-8')      # 接收文件名
    file = os.path.join(r'D:homeworkday29file', filename)        # 获取文件路径
    filesize = os.path.getsize(file)
    dic = {'filename': filename, 'filesize': filesize}
    strdic = json.dumps(dic)
    conn.send(strdic.encode('utf-8'))
    with open(file, mode='rb') as f:       # 打开文件,模式为读取字节
        content = f.read()

    conn.send(content)
    print('下载完成!')


def run(con):
    dic = {'1': up, '2': download}
    while 1:
        choice = con.recv(1024).decode('utf-8')
        print(choice)
        func = dic.get(choice)
        if choice.upper() == 'Q':
            break
        if not func:
            print('输入有误!')
            time.sleep(1)
            continue
        func()
        print('任务完成!')
        break


sk = socket.socket()
sk.bind(('127.0.0.1', 9000))
sk.listen()
while 1:
    conn, addr = sk.accept()
    run(conn)
    conn.close()


sk.close()

client端

import os
import json
import socket


def up():
    sk.send('1'.encode('utf-8'))
    file_path = input('>>>')  # 输入文件路径
    if file_path.upper() == 'Q':
        sk.send(b'Q')
        return
    if os.path.isabs(file_path):  # 判断文件路径是否为绝对路径
        filename = os.path.basename(file_path)  # 返回文件名
        filesize = os.path.getsize(file_path)  # 返回文件大小
        dic = {'filename': filename, 'filesize': filesize}  # 存入字典
        str_dic = json.dumps(dic)  # 转为str格式
        sk.send(str_dic.encode('utf-8'))
        with open(file_path, mode='rb') as f:  # 打开文件,模式为读取字节
            content = f.read()
            sk.send(content)

    print('上传完成!')


def download():
    sk.send(b'2')
    print('3333')
    msg = sk.recv(1024).decode('utf-8')
    article = json.loads(msg)
    for i in range(len(article)):
        print('序号:', i+1, '文件名:', article[i])
    user = int(input('请选择序号:'))
    sk.send(article[user-1].encode('utf-8'))
    strdic = sk.recv(1024).decode('utf-8')
    dic = json.loads(strdic)
    content = sk.recv(dic['filesize'])
    with open(dic['filename'], 'wb') as f:
        f.write(content)
    print('下载完成!')


def run():
    dic = {'1': up, '2': download}
    while 1:
        user = input('1.上传文件
2.下载文件
请选择(Q/q退出):')
        if user.upper() == 'Q':
            break
        choice = dic.get(user)
        if not choice:
            print('输入有误!')
            continue
        dic[user]()
    print('任务完成程序结束!')
    return


def regis():
    while 1:
        username = input('用户名:')
        pwd = input('密码:')
        if username == 'alex' and pwd == '123':
            print('登陆成功!')
            run()
            return
        else:
            print('账号或密码错误!')


sk = socket.socket()
sk.connect(('127.0.0.1', 9000))
if __name__ == '__main__':
    regis()
    sk.close()