## 程序介绍:
- 实现了基于线程开发一个FTP服务器的常用功能
- 基本功能全部用python的基础知识实现,用到了socket\hashlib\configparse\os\sys\pickle\函数\模块\类知识
- 在保证了支持多并发的功能上，不使用SocketServer模块，自己实现了多线程，而且使用了队列
 
## 概述
本次作业文件夹一共包含了以下4个文件：
- 程序结构图：整个Thread_based_FTP_homework的程序文件结构
- 程序结构文件：整个Thread_based_FTP_homework的程序文件结构
- 程序文件: Thread_based_FTP_homework
- 程序说明文件：README.md
 
## 程序要求
- 1.用户加密认证
- 2.允许同时多用户登录
- 3.每个用户有自己的家目录 ，且只能访问自己的家目录
- 4.对用户进行磁盘配额，每个用户的可用空间不同
- 5.允许用户在ftp server上随意切换目录
- 6.允许用户查看当前目录下文件
- 7.允许上传和下载文件，保证文件一致性(md5)
- 8.文件传输过程中显示进度条
- 9.附加功能：支持文件的断点续传
 
- 10.在之前开发的FTP基础上，开发支持多并发的功能 
- 11.不能使用SocketServer模块，必须自己实现多线程 
- 12.必须用到队列Queue模块，实现线程池 
- 13.允许配置最大并发数，比如允许只有10个并发用户
 
## 本项目思路
- 1 对于此次项目，在上次作业的基础上完成
- 2 本次首要任务，为了降低程序的耦合性，将把server端和client端的许多东西分出来，保证一个函数只做一件事情
- 3 发现了上次作业里面出现的小问题，进行了解决
- 4 使用队列Queue模块，实现多线程
- 5 设置配置最大的并发数，此处设置在settings里面，最大并发用户设置为3
 
 
##### 备注（程序结构）
> 目前还不会把程序树放在README.md里面，所以做出程序结构的txt版本和图片版本，放在文件外面方便查看
 
## 对几个实例文件的说明
### 几个实例文件全是为了上传和下载使用，自己随便找的素材，没有把视频，照片上传
 
## 不足及其改进的方面
### 每次程序从用户登陆到使用只能完成一次功能，不能重复使用
 
## 程序结构
 
 
│  Thread_based_FTP_homework
│  __init__.py
│ 
├─client                # 客户端程序入口
│  │  __init__.py
│  ├─bin                # 可执行程序入口目录
│  │      run.py
│  │      __init__.py
│  ├─config             # 配置文件目录
│  │  │  settings.py    # 配置文件
│  │  │  __init__.py      
│  ├─core                          # 主要逻辑程序目录
│  │  │  file_func.py              # client端文件操作功能模块
│  │  │  ftp_client.py             # client端主程序模块
│  │  │  md5_func.py               # client端对文件加密操作功能模块
│  │  │  progress_bar_func_func.py # client端文件下载进度条操作功能模块
│  │  │  __init__.py      
│  ├─download           # 下载内容模块
│  │      a.txt
│  │      b.txt
│  │      c.txt 
│  └─upload             # 上传内容模块
│          a.txt
│          b.txt
└─server                 # 服务端程序入口
    ├─bin
    │      run.py        # 可执行程序入口目录
    │      __init__.py
    ├─config             # 配置文件目录
    │  │  accounts.ini   # 账号密码配置文件
    │  │  settings.py    # 配置文件
    │  │  __init__.py       
    ├─core               # 主要逻辑程序目录
    │  │  ftp_server.py  # server端主程序模块
    │  │  main.py        # 主程序模块
    │  │  user_handle.py # 用户注册登录模块 
    │  │  file_func.py   # server端文件操作功能模块
    │  │  auth_func.py   # server端用户认证功能模块
    │  │  md5_func.py    # server端对文件加密操作功能模块
    └─home               # 家目录
        │  __init__.py
        ├─curry          # curry用户的家目录
        │  │  a.txt
        │  │  b.txt
        │  │  c.txt
        ├─durant         # durant用户的家目录
        │  └─test3
        │  └─test4
        └─james           # james用户的家目录
            │  a.txt
            │  b.txt
            │  c.txt
            │  test1
            │  test2
            └─test3

# _*_ coding: utf-8 _*_
import os
import sys
 
 
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(BASE_DIR)
 
 
from core import ftp_server
from core import main
from config import settings
 
if __name__ == ‘__main__‘:
    a = main.Manager()
    a.interactive()

# _*_ coding: utf-8 _*_
import os
import sys
import socket
import logging
  
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(BASE_DIR)
  
ACCOUNTS_FILE = os.path.join(BASE_DIR,‘config‘,‘accounts.ini‘)
  
address_family = socket.AF_INET
socket_type = socket.SOCK_STREAM
  
BIND_HOST = ‘127.0.0.1‘
BIND_PORT = 9999
ip_port = (BIND_HOST,BIND_PORT)
coding = ‘utf-8‘
listen_count = 5
max_recv_bytes = 8192
allow_reuser_address = False
# 允许配置最大并发数,这里设置为3
MAX_CONCURRENT_COUNT =3

# _*_ coding: utf-8 _*_
import pickle
import hashlib
import os
import struct
 
from config import settings
from core.user_handle import UserHandle
from core.file_func import File_func
 
class Auth_func():
 
    def auth(self, conn):
        ‘‘‘
        处理用户的认证请求
        1，根据username读取accounts.ini文件，然后查看用户是否存在
        2，将程序运行的目录从bin.user_auth修改到用户home/username方便之后查询
        3，把客户端返回用户的详细信息
        :return:
        ‘‘‘
        while True:
            user_dic = self.get_recv(conn)
            username = user_dic[‘username‘]
            password = user_dic[‘password‘]
            md5_obj = hashlib.md5(password.encode(‘utf-8‘))
            check_password = md5_obj.hexdigest()
            user_handle = UserHandle(username)
            # 判断用户是否存在 返回列表,
            user_data = user_handle.judge_user()
            if user_data:
                if user_data[0][1] == check_password:
                    conn.send(struct.pack(‘i‘, 1))  # 登录成功返回 1
                    self.homedir_path = os.path.join(settings.BASE_DIR, ‘home‘, username)
                    # 将程序运行的目录名修改到 用户home目录下
                    os.chdir(self.homedir_path)
                    # 将用户配额的大小从M 改到字节
                    self.quota_bytes = int(user_data[2][1]) * 1024 * 1024
                    user_info_dic = {
                        ‘username‘: username,
                        ‘homedir‘: user_data[1][1],
                        ‘quota‘: user_data[2][1]
                    }
                    # 用户的详细信息发送到客户端
                    conn.send(pickle.dumps(user_info_dic))
                    return True
                else:
                    conn.send(struct.pack(‘i‘, 0))  # 登录失败返回 0
            else:
                conn.send(struct.pack(‘i‘, 0))  # 登录失败返回 0
 
 
    def get_recv(self, conn):
        ‘‘‘从client端接收发来的数据‘‘‘
        return pickle.loads(conn.recv(settings.max_recv_bytes))
 
    def current_home_size(self):
        """得到当前用户目录的大小，字节/M"""
        self.home_bytes_size = 0
        File_func().recursion_file(self.homedir_path, self.home_bytes_size)
        home_m_size = round(self.home_bytes_size / 1024 / 1024, 1)

# _*_ coding: utf-8 _*_
import os
import sys
import struct
import pickle
 
from config import settings
from core import ftp_server
from core import md5_func
 
 
class File_func(object):
    def readfile(self,file_path):
        ‘‘‘读取文件，得到文件内容的bytes类型‘‘‘
        with open(file_path, ‘rb‘) as f:
            filedata = f.read()
        return filedata
 
    def send_filedata(self,file_path,conn,exist_file_size=0):
        """下载时，将文件打开，send(data)"""
        with open(file_path, ‘rb‘) as f:
            f.seek(exist_file_size)
            while True:
                data = f.read(1024)
                if data:
                    conn.send(data)
                else:
                    break
 
    def write_file(self,conn,f,recv_size,file_size):
        ‘‘‘上传文件时，将文件内容写入到文件中‘‘‘
        while recv_size < file_size:
            res = conn.recv(settings.max_recv_bytes)
            f.write(res)
            recv_size += len(res)
            conn.send(struct.pack(‘i‘, recv_size))  # 为了进度条的显示
 
    def recursion_file(self, homedir_path,home_bytes_size):
        """递归查询用户目录下的所有文件，算出文件的大小"""
        res = os.listdir(homedir_path)
        for i in res:
            path = os.path.join(homedir_path,i)
            if os.path.isdir(path):
                self.recursion_file(path,home_bytes_size)
            elif os.path.isfile(path):
                home_bytes_size += os.path.getsize(path)
 
    def current_home_size(self,homedir_path):
        """得到当前用户目录的大小，字节/M"""
        self.home_bytes_size =0
        self.recursion_file(self.home_bytes_size,homedir_path)
        home_m_size = round(self.home_bytes_size / 1024 / 1024, 1)

# _*_ coding: utf-8 _*_
import socket
import struct
import json
import os
import pickle
import subprocess
import hashlib
import queue
from threading import Thread
from threading import currentThread
 
from config import settings
from core.user_handle import UserHandle
from core.file_func import File_func
from core.md5_func import Md5_func
from core.auth_func import Auth_func
class FTPServer():
 
    def __init__(self,server_address,bind_and_listen = True):
        self.server_address = server_address
        self.socket = socket.socket(settings.address_family,settings.socket_type)
        self.q = queue.Queue(settings.MAX_CONCURRENT_COUNT)
        if bind_and_listen:
            try:
                self.server_bind()
                self.server_listen()
            except Exception:
                self.server_close()
 
    def server_bind(self):
        allow_reuse_address = False
        if allow_reuse_address:
            self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        self.socket.bind(self.server_address)
 
    def server_listen(self):
        self.socket.listen(settings.listen_count)
 
    def server_close(self):
        self.socket.close()
 
    def server_accept(self):
        return self.socket.accept()
 
    def conn_close(self, conn):
        conn.close()
 
    def server_link(self):
        print("\033[31;1mwaiting client .....\033[0m")
        while True:  # 链接循环
            conn,self.client_addr = self.server_accept()
            print(‘客户端地址:‘, self.client_addr)
            # while True:  # 通信循环
            try:
                t = Thread(target=self.server_handle,args=(conn,))
                self.q.put(t)
                t.start()
            except Exception as e:
                print(e)
                self.conn_close(conn)
                self.q.get()
 
    def server_handle(self,conn):
        ‘‘‘处理与用户的交互指令‘‘‘
        if Auth_func().auth(conn):
            print("\033[32;1m-------user authentication successfully-------\033[0m")
            try:
                res = conn.recv(settings.max_recv_bytes)
                if not res:
                    self.conn_close(conn)
                    self.q.get()
                # 解析命令，提取相应的参数
                self.cmds = res.decode(settings.coding).split()
                if hasattr(self, self.cmds[0]):
                    func = getattr(self, self.cmds[0])
                    func(conn)
            except Exception as e:
                print(e)
                self.conn_close(conn)
                self.q.get()
   
    def get(self, conn):
        ‘‘‘
       下载，首先查看文件是否存在，然后上传文件的报头大小，上传文件，以读的方式发开文件
       找到下载的文件
        发送 header_size
        发送 header_bytes file_size
        读文件 rb 发送 send(line)
        若文件不存在，发送0 client提示：文件不存在
       :param cmds:
       :return:
               ‘‘‘
        if len(self.cmds) > 1:
            filename = self.cmds[1]
            self.file_path = os.path.join(os.getcwd(), filename)
            if os.path.isfile(self.file_path):
                file_size = os.path.getsize(self.file_path)
                obj = conn.recv(4)
                exist_file_size = struct.unpack(‘i‘, obj)[0]
                header = {
                    ‘filename‘: filename,
                    ‘filemd5‘: Md5_func().getfile_md5(self.file_path),
                    ‘file_size‘: file_size
                }
                header_bytes = pickle.dumps(header)
                conn.send(struct.pack(‘i‘, len(header_bytes)))
                conn.send(header_bytes)
                if exist_file_size:  # 表示之前被下载过 一部分
                    if exist_file_size != file_size:
                        File_func().send_filedata(self.file_path, exist_file_size)
                    else:
                        print(‘\033[31;1mbreakpoint and file size are the same\033[0m‘)
                else:  # 文件第一次下载
                    File_func().send_filedata(self.file_path, conn)
            else:
                print(‘\033[31;1merror\033[0m‘)
                conn.send(struct.pack(‘i‘, 0))
 
        else:
            print("\033[31;1muser does not enter file name\033[0m")
 
    def put(self, conn):
        """从client上传文件到server当前工作目录下
        """
        if len(self.cmds) > 1:
            obj = conn.recv(4)
            state_size = struct.unpack(‘i‘, obj)[0]
            if state_size:
                # 算出了home下已被占用的大小self.home_bytes_size
                self.current_home_size()
                header_bytes = conn.recv(struct.unpack(‘i‘, conn.recv(4))[0])
                header_dic = pickle.loads(header_bytes)
                filename = header_dic.get(‘filename‘)
                file_size = header_dic.get(‘file_size‘)
                file_md5 = header_dic.get(‘file_md5‘)
                self.file_path = os.path.join(os.getcwd(), filename)
                if os.path.exists(self.file_path):
                    conn.send(struct.pack(‘i‘, 1))
                    has_size = os.path.getsize(self.file_path)
                    if has_size == file_size:
                        print("\033[31;1mfile already does exist!\033[0m")
                        conn.send(struct.pack(‘i‘, 0))
                    else:
                        print(‘\033[31;1mLast time  file not finished,this time continue\033[0m‘)
                        conn.send(struct.pack(‘i‘, 1))
                        if self.home_bytes_size + int(file_size - has_size) > self.quota_bytes:
                            print(‘\033[31;1mSorry exceeding user quotas\033[0m‘)
                            conn.send(struct.pack(‘i‘, 0))
                        else:
                            conn.send(struct.pack(‘i‘, 1))
                            conn.send(struct.pack(‘i‘, has_size))
                            with open(self.file_path, ‘ab‘) as f:
                                f.seek(has_size)
                                File_func().write_file(conn, f, has_size, file_size)
                            Md5_func().verification_filemd5(self.file_path, conn, file_md5)
 
                else:
                    conn.send(struct.pack(‘i‘, 0))
                    print(‘\033[31;1mfile does not exist, now first put\033[0m‘)
                    if self.home_bytes_size + int(file_size) > self.quota_bytes:
                        print(‘\033[31;1mSorry exceeding user quotas\033[0m‘)
                        conn.send(struct.pack(‘i‘, 0))
                    else:
                        conn.send(struct.pack(‘i‘, 1))
                        with open(self.file_path, ‘wb‘) as f:
                            recv_size = 0
                            File_func().write_file(conn, f, recv_size, file_size)
                        Md5_func().verification_filemd5(self.file_path,conn, file_md5)
 
 
            else:
                print("\033[31;1mfile does not exist!\033[0m")
        else:
            print("\033[31;1muser does not enter file name\033[0m")
 
    def ls(self, conn):
        ‘‘‘查看当前工作目录下，先返回文件列表的大小，在返回查询的结果‘‘‘
        print("\033[34;1mview current working directory\033[0m")
        subpro_obj = subprocess.Popen(‘dir‘, shell=True,
                                      stdout=subprocess.PIPE,
                                      stderr=subprocess.PIPE)
        stdout = subpro_obj.stdout.read()
        stderr = subpro_obj.stderr.read()
        conn.send(struct.pack(‘i‘, len(stdout + stderr)))
        conn.send(stdout)
        conn.send(stderr)
        print(‘\033[31;1mCongratulations view directory success\033[0m‘)
 
    def mkdir(self, conn):
        ‘‘‘增加目录
        在当前目录下,增加目录
        1.查看目录名是否已经存在
        2.增加目录成功,返回 1
        2.增加目录失败,返回 0‘‘‘
        print("\033[34;1madd working directory\033[0m")
        if len(self.cmds) > 1:
            mkdir_path = os.path.join(os.getcwd(), self.cmds[1])
            if not os.path.exists(mkdir_path):
                os.mkdir(mkdir_path)
                print(‘\033[31;1mCongratulations add directory success\033[0m‘)
                conn.send(struct.pack(‘i‘, 1))
            else:
                print("\033[31;1muser directory already does exist\033[0m")
                conn.send(struct.pack(‘i‘, 0))
        else:
            print("\033[31;1muser does not enter file name\033[0m")
 
    def cd(self, conn):
        ‘‘‘切换目录
        1.查看是否是目录名
        2.拿到当前目录,拿到目标目录,
        3.判断homedir是否在目标目录内,防止用户越过自己的home目录 eg: ../../....
        4.切换成功,返回 1
        5.切换失败,返回 0‘‘‘
        print("\033[34;1mSwitch working directory\033[0m")
        if len(self.cmds) > 1:
            dir_path = os.path.join(os.getcwd(), self.cmds[1])
            if os.path.isdir(dir_path):
                # os.getcwd 获取当前工作目录
                previous_path = os.getcwd()
                # os.chdir改变当前脚本目录
                os.chdir(dir_path)
                target_dir = os.getcwd()
                if self.homedir_path in target_dir:
                    print(‘\033[31;1mCongratulations switch directory success\033[0m‘)
                    conn.send(struct.pack(‘i‘, 1))
                else:
                    print(‘\033[31;1mSorry switch directory failed\033[0m‘)
                    # 切换失败后,返回到之前的目录下
                    os.chdir(previous_path)
                    conn.send(struct.pack(‘i‘, 0))
            else:
                print(‘\033[31;1mSorry switch directory failed,the directory is not current directory\033[0m‘)
                conn.send(struct.pack(‘i‘, 0))
        else:
            print("\033[31;1muser does not enter file name\033[0m")
 
    def remove(self, conn):
        """删除指定的文件,或者空文件夹
               1.删除成功,返回 1
               2.删除失败,返回 0
               """
        print("\033[34;1mRemove working directory\033[0m")
        if len(self.cmds) > 1:
            file_name = self.cmds[1]
            file_path = os.path.join(os.getcwd(), file_name)
            if os.path.isfile(file_path):
                os.remove(file_path)
                conn.send(struct.pack(‘i‘, 1))
            elif os.path.isdir(file_path):  # 删除空目录
                if not len(os.listdir(file_path)):
                    os.removedirs(file_path)
                    print(‘\033[31;1mCongratulations remove success\033[0m‘)
                    conn.send(struct.pack(‘i‘, 1))
                else:
                    print(‘\033[31;1mSorry remove directory failed\033[0m‘)
                    conn.send(struct.pack(‘i‘, 0))
            else:
                print(‘\033[31;1mSorry remove directory failed\033[0m‘)
                conn.send(struct.pack(‘i‘, 0))
        else:
            print("\033[31;1muser does not enter file name\033[0m")

# _*_ coding: utf-8 _*_
from core.user_handle import UserHandle
from core.ftp_server import FTPServer
from config import settings
 
 
class Manager():
    ‘‘‘
    主程序，包括启动server，创建用户，退出
    :return:
    ‘‘‘
    def __init__(self):
        pass
 
    def start_ftp(self):
        ‘‘‘启动server端‘‘‘
        server = FTPServer(settings.ip_port)
        server.server_link()
        server.close()
 
    def create_user(self):
        ‘‘‘创建用户，执行创建用户的类‘‘‘
        username =  input("\033[32;1mplease input your username>>>\033[0m").strip()
        UserHandle(username).add_user()
 
    def logout(self):
        ‘‘‘
        退出登陆
        :return:
        ‘‘‘
        print("\033[32;1m-------Looking forward to your next login-------\033[0m")
        exit()
 
    def interactive(self):
        ‘‘‘交互函数‘‘‘
        msg = ‘‘‘\033[32;1m
                       1   启动ftp服务端
                       2   创建用户
                       3   退出
               \033[0m‘‘‘
        menu_dic = {
            "1": ‘start_ftp‘,
            "2": ‘create_user‘,
            "3": ‘logout‘,
        }
        exit_flag = False
        while not exit_flag:
            print(msg)
            user_choice = input("Please input a command>>>").strip()
            if user_choice in menu_dic:
                getattr(self,menu_dic[user_choice])()
            else:
                print("\033[31;1myou choice doesn‘t exist\033[0m")

# _*_ coding: utf-8 _*_
import hashlib
import struct
 
from core import ftp_server
from core import file_func
 
class Md5_func(object):
 
    def getfile_md5(self,file_path):
        ‘‘‘获取文件的md5‘‘‘
        md5 = hashlib.md5(file_func.File_func().readfile(file_path))
        print("md5是：\n",md5.hexdigest())
        return md5.hexdigest()
 
    def handle_data(self):
        ‘‘‘处理接收到的数据，主要是将密码转化为md5的形式‘‘‘
        user_dic = ftp_server.FTPServer().get_recv()
        username = user_dic[‘username‘]
        password = user_dic[‘password‘]
        md5_obj = hashlib.md5()
        md5_obj.update(password)
        check_password = md5_obj.hexdigest()
 
    def verification_filemd5(self,file_path,conn,filemd5):
        # 判断文件内容的md5
        if self.getfile_md5(file_path) == filemd5:
            print(‘\033[31;1mCongratulations download success\033[0m‘)
            conn.send(struct.pack(‘i‘, 1))
        else:
            print(‘\033[31;1mSorry download failed\033[0m‘)
            conn.send(struct.pack(‘i‘, 0))

#_*_coding:utf-8_*_
import configparser
import hashlib
import os
 
from config import settings
 
class UserHandle():
    ‘‘‘
    创建用户名称，密码
    如果用户存在，则返回，如果用户不存在，则注册成功
    ‘‘‘
    def __init__(self,username):
        self.username = username
        self.config = configparser.ConfigParser()
        self.config.read(settings.ACCOUNTS_FILE)
 
    def password(self):
        ‘‘‘生成用户的密码，然后加密‘‘‘
        password_inp = input("\033[32;1mplease input your password>>>\033[0m").strip()
        md5_obj = hashlib.md5()
        md5_obj.update(password_inp.encode(‘utf-8‘))
        md5_password = md5_obj.hexdigest()
        return md5_password
 
    def disk_quota(self):
        ‘‘‘生成每个用户的磁盘配额‘‘‘
        quota = input(‘\033[32;1mplease input Disk quotas>>>:\033[0m‘).strip()
        if quota.isdigit():
            return quota
        else:
            exit(‘\033[31;1mdisk quotas must be integer\033[0m‘)
 
    def add_user(self):
        ‘‘‘创建用户，存到accounts.ini‘‘‘
        if not self.config.has_section(self.username):
            print(‘\033[31;1mcreating username is :%s \033[0m‘ % self.username)
            self.config.add_section(self.username)
            self.config.set(self.username,‘password‘,self.password())
            self.config.set(self.username, ‘homedir‘, ‘home/‘ + self.username)
            self.config.set(self.username, ‘quota‘, self.disk_quota())
            self.write_config()
            self.create_userhome()
            print(‘\033[1;32msuccessfully create userdata\033[0m‘)
        else:
            print(‘\033[1;31musername already existing\033[0m‘)
 
    def create_userhome(self):
        ‘‘‘创建用户的home文件夹‘‘‘
        os.mkdir(os.path.join(settings.BASE_DIR, ‘home‘, self.username))
 
    def write_config(self):
        ‘‘‘写入文档‘‘‘
        with open(settings.ACCOUNTS_FILE,‘w‘) as f:
            self.config.write(f)
 
    def judge_user(self):
        ‘‘‘判断用户是否存在‘‘‘
        if self.config.has_section(self.username):
            return self.config.items(self.username)

# _*_ coding: utf-8 _*_
import os
import sys
 
 
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(BASE_DIR)
 
 
from core import ftp_client
from config import settings
if __name__ == ‘__main__‘:
    run = ftp_client.FTPClient(settings.ip_port)
    run.execute()

# _*_ coding: utf-8 _*_
import os
import sys
import socket
 
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(BASE_DIR)
# 下载的文件存放路径
down_filepath = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), ‘download‘)
# 上传的文件存放路径
upload_filepath = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), ‘upload‘)
#绑定的IP地址
BIND_HOST = ‘127.0.0.1‘
#绑定的端口号
BIND_PORT = 9999
ip_port = (BIND_HOST,BIND_PORT)
address_family = socket.AF_INET
socket_type = socket.SOCK_STREAM
 
coding = ‘utf-8‘
listen_count = 5
max_recv_bytes = 8192
allow_reuser_address = False

# _*_ coding: utf-8 _*_
import os
import sys
import struct
import pickle
from config import settings
from core import ftp_client
from core import md5_func
from core import progress_bar_func
 
class File_func(object):
 
    def readfile(self,file_path):
        ‘‘‘读取文件‘‘‘
        with open(file_path,‘rb‘) as f:
            filedata = f.read()
        return filedata
 
    def appendfile_content(self,socket,file_path,temp_file_size,file_size):
        ‘‘‘追加文件内容‘‘‘
        with open(file_path,‘ab‘) as f:
            f.seek(temp_file_size)
            get_size = temp_file_size
            while get_size < file_size:
                res = socket.recv(settings.max_recv_bytes)
                f.write(res)
                get_size += len(res)
                progress_bar_func.progress_bar(1,get_size,file_size)  #1表示下载
 
    def write_file(self,socket,f,get_size,file_size):
        ‘‘‘下载文件，将内容写入文件中‘‘‘
        while get_size < file_size:
            res = socket.recv(settings.max_recv_bytes)
            f.write(res)
            get_size += len(res)
            progress_bar_func.progress_bar(1,get_size,file_size)  #1表示下载
 
    def recv_file_header(self,socket,header_size):
        """接收文件的header, filename file_size file_md5"""
        header_types = socket.recv(header_size)
        header_dic = pickle.loads(header_types)
        print(header_dic, type(header_dic))
        total_size = header_dic[‘file_size‘]
        filename = header_dic[‘filename‘]
        filemd5 = header_dic[‘filemd5‘]
        return (filename,total_size,filemd5)
 
    def open_sendfile(self,file_size,file_path,socket,recv_size =0):
        ‘‘‘打开要上传的文件（由于本程序上传文件的原理是先读取本地文件，再写到上传地址的文件）‘‘‘
        with open(file_path, ‘rb‘) as f:
            f.seek(recv_size)
            while True:
                data = f.read(1024)
                if data:
                    socket.send(data)
                    obj = socket.recv(4)
                    recv_size = struct.unpack(‘i‘, obj)[0]
                    progress_bar_func.progress_bar(2, recv_size, file_size)
                else:
                    break
        success_state = struct.unpack(‘i‘, socket.recv(4))[0]
        if success_state:
            print(‘\033[31;1mCongratulations upload success\033[0m‘)
        else:
            print(‘\033[31;1mSorry upload directory failed\033[0m‘)

# _*_ coding: utf-8 _*_
import socket
import struct
import json
import os
import sys
import pickle
import hashlib
 
from config import settings
from core.md5_func import Md5_func
from core.file_func import File_func
from core import progress_bar_func
class FTPClient:
 
    def __init__(self,server_address,connect = True):
        self.server_address = server_address
        self.socket = socket.socket(settings.address_family,settings.socket_type)
        if connect:
            try:
                self.client_connect()
            except Exception:
                self.client_close()
 
    def client_connect(self):
        try:
            self.socket.connect(self.server_address)
        except Exception as e:
            print("\033[31;1merror:%s\033[0m"%e)
            exit("\033[31;1m\nThe server is not activated \033[0m")
 
    def client_close(self):
        self.socket.close()
 
    def get(self,cmds):
        """从server下载文件到client
        """
        if len(cmds) >1:
            filename = cmds[1]
            self.file_path = os.path.join(settings.down_filepath, filename)
            if os.path.isfile(self.file_path):  #如果文件存在，支持断电续传
                temp_file_size = os.path.getsize(self.file_path)
                self.socket.send(struct.pack(‘i‘,temp_file_size))
                header_size = struct.unpack(‘i‘,self.socket.recv(4))[0]
                if header_size:
                    filename,file_size,filemd5 = File_func().recv_file_header(self.socket,header_size)
                    if temp_file_size == file_size:
                        print(‘\033[34;1mFile already does exist\033[0m‘)
                    else:
                        print(‘\033[34;1mFile now is breakpoint continuation\033[0m‘)
                        File_func().appendfile_content(self.socket,self.file_path,temp_file_size,file_size)
                        Md5_func().verification_filemd5(self.file_path,filemd5)
                else:
                    print("\033[34;1mFile was downloaded before,but now server‘s file is not exist\033[0m")
            else:#如果文件不存在，则是直接下载
                self.socket.send(struct.pack(‘i‘,0))
                obj = self.socket.recv(1024)
                header_size = struct.unpack(‘i‘, obj)[0]
                if header_size==0:
                    print("\033[31;1mfile does not exist!\033[0m")
                else:
                    filename, file_size, filemd5 = File_func().recv_file_header(self.socket,header_size)
                    download_filepath = os.path.join(settings.down_filepath, filename)
                    with open(download_filepath, ‘wb‘) as f:
                        get_size = 0
                        File_func().write_file(self.socket,f, get_size, file_size)
                    Md5_func().verification_filemd5(self.file_path,filemd5)
        else:
            print("\033[31;1muser does not enter file name\033[0m")
 
    def ls(self,cmds):
        ‘‘‘查看当前工作目录，文件列表‘‘‘
        print("\033[34;1mview current working directory\033[0m")
        obj = self.socket.recv(4)
        dir_size = struct.unpack(‘i‘,obj)[0]
        recv_size = 0
        recv_bytes = b‘‘
        while recv_size <dir_size:
            temp_bytes = self.socket.recv(settings.max_recv_bytes)
            recv_bytes +=temp_bytes
            recv_size += len(temp_bytes)
        print(recv_bytes.decode(‘gbk‘))
        print(‘\033[31;1mCongratulations view directory success\033[0m‘)
 
    def mkdir(self,cmds):
        ‘‘‘增加目录
        1，server返回1 增加成功
        2，server返回2 增加失败‘‘‘
        print("\033[34;1madd working directory\033[0m")
        obj = self.socket.recv(4)
        res = struct.unpack(‘i‘,obj)[0]
        if res:
            print(‘\033[31;1mCongratulations add directory success\033[0m‘)
        else:
            print(‘\033[31;1mSorry add directory failed\033[0m‘)
 
    def cd(self,cmds):
        ‘‘‘切换目录‘‘‘
        print("\033[34;1mSwitch working directory\033[0m")
        if len(cmds) >1:
            obj = self.socket.recv(4)
            res = struct.unpack(‘i‘, obj)[0]
            if res:
                print(‘\033[31;1mCongratulations switch directory success\033[0m‘)
            else:
                print(‘\033[31;1mSorry switch directory failed\033[0m‘)
        else:
            print("\033[31;1muser does not enter file name\033[0m")
 
    def remove(self,cmds):
        ‘‘‘表示删除文件或空文件夹‘‘‘
        print("\033[34;1mRemove working directory\033[0m")
        obj = self.socket.recv(4)
        res = struct.unpack(‘i‘, obj)[0]
        if res:
            print(‘\033[31;1mCongratulations remove success\033[0m‘)
        else:
            print(‘\033[31;1mSorry remove directory failed\033[0m‘)
 
    def put_situation(self,file_size,condition=0):
        ‘‘‘上传的时候有两种情况，文件已经存在，文件不存在‘‘‘
        quota_state= struct.unpack(‘i‘, self.socket.recv(4))[0]
        if quota_state:
            if condition:
                obj = self.socket.recv(4)
                recv_size = struct.unpack(‘i‘, obj)[0]
                File_func().open_sendfile(file_size, self.file_path, self.socket, recv_size=0)
            else:
                File_func().open_sendfile(file_size, self.file_path, self.socket, recv_size=0)
        else:
            print(‘\033[31;1mSorry exceeding user quotas\033[0m‘)
 
    def put(self,cmds):
        """往server端登录的用户目录下上传文件
        """
        if len(cmds) > 1:
            filename = cmds[1]
            file_path = os.path.join(settings.upload_filepath, filename)
            if os.path.isfile(file_path):  # 如果文件存在，支持断电续传
                self.socket.send(struct.pack(‘i‘, 1))
                self.file_path = file_path
                file_size = os.path.getsize(self.file_path)
                header_dic = {
                    ‘filename‘: os.path.basename(filename),
                    ‘file_md5‘:  Md5_func().getfile_md5(self.file_path),
                    ‘file_size‘: file_size
                }
                header_bytes = pickle.dumps(header_dic)
                self.socket.send(struct.pack(‘i‘, len(header_bytes)))
                self.socket.send(header_bytes)
                state = struct.unpack(‘i‘, self.socket.recv(4))[0]
                if state:  #已经存在
                    has_state = struct.unpack(‘i‘, self.socket.recv(4))[0]
                    if has_state:
                        self.put_situation(file_size, 1)
                    else:  # 存在的大小 和文件大小一致 不必再传
                        print("\033[31;1mfile already does exist!\033[0m")
                else:  # 第一次传
                        self.put_situation(file_size)
            else:  # 文件不存在
                print("\033[31;1mfile does not exist!\033[0m")
                self.socket.send(struct.pack(‘i‘, 0))
        else:
            print("\033[31;1muser does not enter file name\033[0m")
 
    def get_recv(self):
        ‘‘‘从client端接受发来的数据‘‘‘
        return pickle.loads(self.socket.recv(settings.max_recv_bytes))
 
    def login(self):
        ‘‘‘
        登陆函数，当登陆失败超过三次，则退出
        用户密码发送到server短
        接受server端返回的信息，如果成功返回1，失败返回0
        :return: 如果用户账号密码正确，则返回用户数据的字典
        ‘‘‘
        retry_count = 0
        while retry_count <3:
            username = input(‘\033[34;1mplease input Username:\033[0m‘).strip()
            if not username:
                continue
            password = input(‘\033[34;1mplease input Password:\033[0m‘).strip()
            user_dic = {
                ‘username‘:username,
                ‘password‘:password
            }
            #将用户信息发送到客户端，然后接受客户端的数据
            data = pickle.dumps(user_dic)
            self.socket.send(pickle.dumps(user_dic))
            #为了防止出现黏包问题，所以先解压报头，读取报头，再读数据
            obj = self.socket.recv(4)
            res = struct.unpack(‘i‘,obj)[0]
            #此处，如果返回的是代码4001，则成功 4002则失败
            if res:
                print("\033[32;1m-----------------welcome to ftp client-------------------\033[0m")
                user_info_dic = self.get_recv()
                recv_username = user_info_dic[‘username‘]
                return True
            else:
                print("\033[31;1mAccount or Passwordoes not correct!\033[0m")
        retry_count +=1
 
    def execute(self):
        ‘‘‘
        执行，或者实施
        :return:
        ‘‘‘
        if self.login():
            while True:
                try:
                    self.help_info()
                    inp = input("Please input a command>>>").strip()
                    if not inp:
                        continue
                    self.socket.send(inp.encode(settings.coding))
                    cmds = inp.split()
                    if hasattr(self, cmds[0]):
                        func = getattr(self, cmds[0])
                        func(cmds)
                        break
                    else:
                        print(‘\033[31;1mNo such command ,please try again\033[0m‘)
                except Exception as e:  # server关闭了
                    print(‘\033[31;1m%s\033[0m‘%e)
                    break
 
    def help_info(self):
        print (‘‘‘\033[34;1m
              get + (文件名）    表示下载文件
              put + (文件名）    表示上传文件
              ls                 表示查询当前目录下的文件列表（只能访问自己的文件列表）
              mkdir + (文件名）  表示创建文件夹 
              cd + (文件名）     表示切换目录（只能在自己的文件列表中切换）
              remove + (文件名） 表示删除文件或空文件夹
        \033[0m‘‘‘)

# _*_ coding: utf-8 _*_
import hashlib
from core import ftp_client
from core.file_func import File_func
 
class Md5_func(object):
    def getfile_md5(self,file_path):
        ‘‘‘对文件内容进行加密，也就是保持文件的一致性‘‘‘
        md5 = hashlib.md5(File_func().readfile(file_path))
        print("md5是：\n",md5.hexdigest())
        return md5.hexdigest()
 
    def verification_filemd5(self,file_path,filemd5):
        # 判断下载下来的文件MD5值和server传过来的MD5值是否一致
        if self.getfile_md5(file_path) == filemd5:
            print(‘\033[31;1mCongratulations download success\033[0m‘)
        else:
            print(‘\033[31;1mSorry download failed,download again support breakpoint continuation\033[0m‘)

# _*_ coding: utf-8 _*_
‘‘‘进度条的表示功能‘‘‘
import sys
 
def progress_bar(num, get_size, file_size):
    float_rate = float(get_size) / float(file_size)
    rate_num = round(float_rate * 100, 2)
    if num == 1:  # 1表示下载
        sys.stdout.write(‘\033[31;1m\rfinish downloaded perentage：{0}%\033[0m‘.format(rate_num))
    elif num == 2:  # 2表示上传
        sys.stdout.write(‘\033[31;1m\rfinish uploaded perentage：{0}%\033[0m‘.format(rate_num))
    sys.stdout.flush()