python day 14: 作业：开发一个能够多用户上传文件的FTP脚本

python day 14

2019/10/19

目录

• python day 14
  • 1. 要求
  • 2. 自己写的程序目录
  • 3. models模块
  • 4. settings模块
  • 5. tcp_server模块
  • 6. client模块
  • 7. 后记

看了老师的FTP脚本之后，我下面的代码就是a piece of shit。不忍目睹。

1. 要求

FTP：

1，单独功能实现(进度条，断点续传)

2，整合

3，bin,config,db,lib程序目录

2. 自己写的程序目录

3. models模块

import os, sys

sys.path.append(os.path.dirname(os.path.dirname(__file__)))
import socketserver
import socket
import hashlib
import pickle
from config import settings
import subprocess
import chardet

def down_file(conn):
    conn.sendall('请输入文件路径'.encode('utf-8'))
    filename = conn.recv(1024).decode('utf-8')
    print(filename)
    path = os.path.join(settings.FILE_DB_DIR, filename)
    if not os.path.exists(path):
        conn.sendall(b'1000')
        filesize = int(conn.recv(1024).decode('utf-8'))
        print(filesize)
        conn.sendall(b'ack')
        has_data = 0
        content = bytes('',encoding='ISO-8859-1')
        while has_data<filesize:
            ret = conn.recv(1024)
            # print(chardet.detect(ret))
            content += ret
            has_data += len(ret)
        f = open(path,'wb')
        f.write(content)
        f.close()
    else:
        conn.sendall(b'1001')
        exist_file_size=os.stat(path).st_size
        conn.sendall(str(exist_file_size).encode('utf-8'))

def do_command(conn):
    conn.sendall('请输入命令'.encode('utf-8'))
    com1 = conn.recv(1024).decode('utf-8')  # ipconfig
    print(com1)
    result = subprocess.check_output(com1)
    # linux系统是以utf-8默认编码，windows是以gbk默认编码，所以此处result是以gbk编码的bytes，折腾了两个小时
    # print(result.decode('gbk'))
    conn.sendall(str(len(result)).encode('utf-8'))  # 1638
    print(conn.recv(1024))  # b'lan'
    conn.sendall('ack'.encode('utf-8'))
    print(conn.recv(1024))  # b'ack'
    result = result.decode('gb2312').encode('utf-8')
    # print(chardet.detect(result))
    conn.sendall(result)

def login(conn, name, pwd):
    m = hashlib.md5(bytes('lan', encoding='utf-8'))
    m.update(bytes(pwd, encoding='utf-8'))
    hex1 = m.hexdigest()
    path = os.path.join(settings.CLIENT_DB_DIR, name)
    result = pickle.load(open(path, 'rb'))
    username, password = result.split('$')
    if username == name and password == hex1:
        conn.sendall('登录成功'.encode('utf-8'))
        return 1
    else:
        conn.sendall('密码错误'.encode('utf-8'))
        return 0

def register(conn, name, pwd):
    m = hashlib.md5(bytes('lan', encoding='utf-8'))
    m.update(bytes(pwd, encoding='utf-8'))
    hex1 = m.hexdigest()
    s1 = '$'.join([name, hex1])
    print(s1)
    path = os.path.join(settings.CLIENT_DB_DIR, name)
    pickle.dump(s1, open(path, 'wb'))
    conn.sendall('用户{0}注册成功'.format(name).encode('utf-8'))

def connect_user(conn, addr1):
    inp = '请输入用户名与密码'.encode('utf-8')
    conn.sendall(inp)
    name = conn.recv(1024).decode('utf-8')

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

    inp2 = '1是登录；2是注册，请输入数字进行选择'.encode('utf-8')
    conn.sendall(inp2)
    ret = conn.recv(1024).decode('utf-8')
    print('来自%s的消息:\n>>>%s' % (addr1[0], ret))
    if ret == '2':
        register(conn, name, pwd)
    if ret == '1':
        result = login(conn, name, pwd)

        if result:
            while True:
                inp3 = '3是执行命令；4是上传文件，请输入数字进行选择'.encode('utf-8')
                conn.sendall(inp3)
                ret2 = conn.recv(1024).decode('utf-8')
                print('来自%s的消息:\n>>>%s' % (addr1[0], ret2))
                if ret2 == '3':
                    do_command(conn)
                elif ret2 == '4':
                    down_file(conn)
                elif ret == 'q':
                    break

class MyServer(socketserver.BaseRequestHandler):
    def handle(self):
        conn, addr2 = self.request, self.client_address
        connect_user(conn, addr2)
        # size_str = conn.recv(1024).decode('utf-8')
        # total_size_int = int(size_str)
        # print('来自%s的消息:\n>>>文件大小是%s' % (addr[0], total_size_int))
        # has_data = 0
        # file_name = conn.recv(1024).decode('utf-8')
        # print('来自%s的消息:\n>>>文件名字是%s' % (addr[0], file_name))
        # conn.sendall('ack'.encode('utf-8'))
        # f = open(file_name, 'wb')
        # while True:
        #     if has_data == total_size_int:
        #         break
        #     ret = conn.recv(1024)
        #     f.write(ret)
        #     has_data += len(ret)
        # f.close()

# class MySocket(socket.socket):
#     def __init__(self, family=-1, type=-1, proto=-1, fileno=None):
#         self.name = None
#         self.pwd = None
#         super().__init__(family, type, proto, fileno)
#
#     def login(self, user, pwd):
#         if self.name == user and self.pwd == pwd:
#             return True
#         else:
#             return False
#
#     def register(self, user, pwd):
#         self.name = user
#         m = hashlib.md5()
#         m.update(bytes(pwd, encoding='utf-8'))
#         password = m.hexdigest()
#         self.pwd = password

if __name__ == '__main__':
    addr = ('192.168.131.1', 9999,)
    tcp_server = socketserver.ThreadingTCPServer(addr, MyServer)
    tcp_server.serve_forever()

4. settings模块

import os

BASE_DIR = os.path.dirname(os.path.dirname(__file__))
CLIENT_DB_DIR = os.path.join(BASE_DIR, 'db', 'client')
FILE_DB_DIR= os.path.join(BASE_DIR, 'db', 'file')

5. tcp_server模块

import os, sys

sys.path.append(os.path.dirname(os.path.dirname(__file__)))
import pickle
from lib.models import *

def main():
    addr = ('192.168.131.1', 9999,)
    tcp_server = socketserver.ThreadingTCPServer(addr, MyServer)
    tcp_server.serve_forever()

if __name__ == '__main__':
    main()

6. client模块

import os, sys
import socket

sys.path.append(os.path.dirname(os.path.dirname(__file__)))
from lib.models import *
import hashlib
import getpass
import chardet
import pickle

def recv_com(obj):
    file_size = int(obj.recv(1024).decode('utf-8'))
    print(file_size)  # 1857
    has_data = 0
    obj.sendall('lan'.encode('utf-8'))
    print(obj.recv(1024))  # b'ack
    obj.sendall(b'ack')
    ret3 = ''
    while has_data < file_size:
        data = obj.recv(1024)
        # print(chardet.detect(data))
        ret3 += data.decode('utf-8')
        has_data += len(data)
        # has_data = len(obj.recv(1024)) 这里还会再执行一次接收数据动作，所以就是这里卡住了。

    print(ret3)

def load_file(obj):
    command1 = obj.recv(1024).decode('utf-8')  # 文件路径
    print(command1)
    file_path = input('文件路径是：\n>>>').strip()
    file_name = os.path.split(file_path)[1]
    obj.sendall(file_name.encode('utf-8'))

    ret_code = obj.recv(1024)
    if ret_code ==b'1000':
        file_size = os.stat(file_path).st_size  # int类型
        obj.sendall(str(file_size).encode('utf-8'))
        obj.recv(1024)
        with open(file_path, 'rb') as f:
            for i in range(1,file_size+1):
                file_content = f.read(1)
                obj.sendall(file_content)
                sys.stdout.write('\r')
                sys.stdout.write('%.2f%% |%s' % (i / file_size * 100, int(i / file_size * 100) * '#'))
                sys.stdout.flush()
    elif ret_code==b'1001':
        pass

def connect_server():
    obj = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    addr = ('192.168.131.1', 9999,)
    obj.connect(addr)
    ret_str = obj.recv(1024).decode('utf-8')
    print('来自%s的消息:\r\n>>>%s' % (addr[0], ret_str))
    user = input('请输入用户名:>>>').strip()
    obj.sendall(user.encode('utf-8'))
    pwd = getpass.win_getpass('password:')
    obj.sendall(pwd.encode('utf-8'))

    result2 = str(obj.recv(1024), encoding='utf-8')  # 1是登录；2是注册，请输入数字进行选择
    print('来自%s的消息:\r\n>>>%s' % (addr[0], result2,))
    inp = input('请输入发送给%s的消息:\n>>>' % addr[0]).strip()  # 1
    obj.sendall(inp.encode('utf-8'))

    result2 = str(obj.recv(1024), encoding='utf-8')
    print('来自%s的消息:\r\n>>>%s' % (addr[0], result2,))  # 登录成功

    while True:
        result2 = str(obj.recv(1024), encoding='utf-8')
        print('来自%s的消息:\r\n>>>%s' % (addr[0], result2,))
        # 3是执行命令；4是上传文件，请输入数字进行选择
        inp = input('请输入发送给%s的消息:\n>>>' % addr[0]).strip()
        obj.sendall(inp.encode('utf-8'))  # 3
        if inp == '3':
            result2 = str(obj.recv(1024), encoding='utf-8')
            print('来自%s的消息:\r\n>>>%s' % (addr[0], result2,))  # 请输入命令
            inp = input('请输入发送给%s的消息:\n>>>' % addr[0]).strip()
            obj.sendall(inp.encode('utf-8'))  # ipconfig
            recv_com(obj)
        elif inp == '4':
            load_file(obj)
        elif inp == 'q':
            obj.close()
            break

def main():
    '''
    客户端主程序
    :return:
    '''
    connect_server()
    # ret = obj.recv(1024).decode('utf-8')
    # print('来自%s的消息:\n>>>%s' % (addr[0], ret))
    # inp = input('请输入要传送的文件路径:\n>>>').strip()
    # size = str(os.stat(inp).st_size, encoding='utf-8')
    # file_name = os.path.split(inp)[1]
    # obj.sendall(size.encode('utf-8'))
    # obj.sendall(file_name.encode('utf-8'))
    # obj.recv(1024)
    # with open(inp, 'rb') as f:
    #     for line in f:
    #         if line:
    #             obj.sendall(line)
    #         else:
    #             print('传送完毕')
    #             break
    # obj.close()

if __name__ == '__main__':
    main()

7. 后记

只实现了多用户md5登录，命令执行，文件传递，进度条显示，并没有实现文件续传功能。

还需要修改。不过也折腾了近5个小时，在编码的转换问题上折腾了好久。

下次一定要记住使用chardet模块的detect方法先检测下编码，然后按照对应的编码方式进行编码与解码。