python之路——作业：高级FTP（仅供参考）

一、作业需求

1. 用户加密认证
2. 多用户同时登陆
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、不同用户配额可不同
5. 用户可以登陆server后，可切换目录
6. 查看当前目录下文件
7. 上传下载文件，保证文件一致性
8. 传输过程中现实进度条
9.支持断点续传

二、实现功能

1、多用户同时登录注册（已有用户：japhi、alex；密码都是123）
2、上传/下载文件（已有示例文件）
3、查看不同用户自己家得目录下文件，且只能访问自己的家目录
4、对用户进行磁盘配额，不同用户配额不同（使用random函数，随机给用户一个内存大小（10m-20m））
5、用户登录后，可对用户目录下文件目录进行操作，包含：ls（查看当前操作目录下文件）、cd(切换当前操作目录)、rm（删除文件）、mkdir（创建目录）
6、上传下载文件，保证文件一致性，且在传输过程中实现进度条
7、支持断点续传（*******暂未实现*******）

三、目录说明

FTP/
|-- FTPClient/              #客户端文件夹
|   |-- 示例文件夹/         #客户端上传/下载示例文件夹
|   |-- Client_start.py     #客户端启动程序
|
|-- FTPServer/              #服务端文件夹
|   |-- bin/
|   |   |-- __init__.py
|   |   |-- Server_start.py   #程序启动的主入口
|   |
|   |-- conf/
|   |   |-- setting.py         #配置文件
|   |
|   |-- db/                    #用户数据
|   |   |-- alex               #用户名alex的数据文件夹
|   |   |-- japhi              #用户名japhi的数据文件夹
|   |
|   |-- home/
|   |   |-- alex/               #用户alex用户家目录
|   |   |-- japhi/              #用户japhi用户家目录
|   |
|-- |-- log/
|   |-- log_sys.log             #日志文件（未启用）
|
|-- |-- src/
|   |   |-- __init__.py
|   |   |-- common.py               #公共功能
|   |   |-- Server_start.py         #程序启动的主入口
|   |   |-- user.py                 #用户类及方法

|-- db/                    #用户数据
|   |   |-- alex               #用户名alex的数据文件夹
|   |   |-- japhi              #用户名japhi的数据文件夹
|-- FTP.png                     #流程图
|-- README.txt

四、流程图

五、代码说明

1、FTPClient/Client_start.py

from __future__ import division
import socket,os,sys,time,hashlib,math
updir = os.path.join(os.path.dirname(os.path.abspath(__file__)),"示例文件夹")

HOST = "localhost"
PORT = 9998
def upload(client,user_info,name):
    '''
    客户端上传文件的函数
    :param client:scoket客户端标志
    :param user_info:客户端登陆用户的信息
    :param name:客户端登陆用户的名字
    :return:none
    '''
    print("33[1;37m当前可选上传33[0m".center(40,"*"))
    dic = {}
    for root, dirs, files in os.walk(updir):
        for i,j in enumerate(files):
            k = i+1
            dic[k] = j
            print("33[1;37m%s：%s33[0m"%(k,j))
    choice = input("请输入要上传的文件序号：>>>").strip()
    if choice.isdigit() and 0 < int(choice) <= len(dic):
        command = "upload+"+user_info+"+"+dic[int(choice)]
        client.sendall(bytes(command,encoding="utf-8"))
        res = client.recv(1024)
        if str(res,encoding="utf-8") == "True":
            dir = os.path.join(updir,dic[int(choice)])
            f = open(dir,"rb")
            md5 = hashlib.md5()
            length = os.stat(dir).st_size
            client.send(str(length).encode())
            sign = client.recv(1024).decode()
            if sign == "ok":
                data = f.read()
                md5.update(data)
                client.sendall(data)
                f.close()
                client.send(md5.hexdigest().encode())
                res_sign = client.recv(1024)
                if res_sign == b'True':
                    print("33[1;37m文件上传成功33[0m")
                elif res_sign == b'False':
                    print("33[1;37m文件上传失败33[0m")
                    exit()
            elif sign == "no":
                print("33[1;37m磁盘空间不足33[0m")
                exit()
    else:
        print("33[1;37m输入有误33[0m")

def download(client,user_info,name):
    '''
    客户端下载文件的函数
    :param client: scoket客户端标志
    :param user_info: 客户端登陆的用户信息
    :param name:客户端登陆的用户名字
    :return: none
    '''
    dic = {}
    command = "download+"+user_info
    client.sendall(bytes(command, encoding="utf-8"))
    data = client.recv(4069)
    res = eval(str(data, encoding="utf-8"))
    if len(res) == 0:
        print("33[1;31m当前目录下暂无文件33[0m".center(40, "-"))
    else:
        for i,j in enumerate(res):
            k = i + 1
            dic[k] = j
            print("33[1;37m%s：%s33[0m" % (k, j))
        choice = input("请选择要下载的文件序号：>>>")
        cm = dic[int(choice)]
        client.sendall(bytes(cm, encoding="utf-8"))
        print("33[1;37m准备开始下载文件33[0m")
        dir = os.path.join(updir, dic[int(choice)])
        res = str(client.recv(1024).decode()).split("+")
        res_length = res[0]
        or_md5 = res[1]
        # print(or_md5)
        length = 0
        f = open(dir, "wb")
        m = hashlib.md5()
        while length < int(res_length):
            if int(res_length) - length > 1024:  # 要收不止一次
                size = 1024
            else:  # 最后一次了，剩多少收多少
                size = int(res_length) - length
                # print("最后一次剩余的:", size)
            data = client.recv(size)
            length += len(data)
            m.update(data)
            f.write(data)
            progressbar(length, int(res_length))
        else:
            new_md5 = m.hexdigest()
            # print(new_md5)
            f.close()
        if new_md5 == or_md5:
            print("33[1;37m文件下载成功33[0m")
            return True
        else:
            print("33[1;37m文件下载失败33[0m")
            return False

def switch(client,user_info,name):
    '''
    切换目录操作函数，包括“ls”，“cd”，“rm”，“mkdir”
    :param client: 客户端
    :param user_info: 用户信息
    :param name: 用户名
    :return: none
    '''
    command = '''
    ls
    cd
    rm
    mkdir 目录名
    '''
    # while True:
    print("33[1;33m%s33[0m" % command)
    c = input("请输入您要操作的命令:>>>").strip()
    if c == "ls":
        view_file(client, user_info, name)
    elif c == "cd":
        cm = "cd+" + user_info
        client.sendall(cm.encode("utf-8"))
        dirs = eval(client.recv(1024).decode())
        if len(dirs) != 0:
            for j in dirs:
                print("33[1;37m目录:%s33[0m" % (j))
            choice = input("请输入“cd”的目录名称：>>").strip()
            if choice in dirs:
                client.sendall(choice.encode("utf-8"))
                sign = client.recv(1024).decode()
                # print(len(res[0]),len(res[1]))
                if sign == "True":
                    print("33[1;31m%s目录切换成功33[0m" % (choice))
                else:
                    print("33[1;31m%s目录切换失败33[0m" % (choice))
            else:
                print("33[1;31m输入有误33[0m")
                client.sendall("error".encode("utf-8"))
                exit()
        else:
            print("33[1;31m无其它目录33[0m")
    elif c.split(" ")[0] == "mkdir":
        cm = "mkdir+" + user_info + "+" + c.split(" ")[1]
        # print(cm)
        client.sendall(cm.encode("utf-8"))
        res = client.recv(1024).decode()
        if res == "True":
            print("33[1;37m目录创建成功33[0m")
        else:
            print("33[1;37m目录创建失败33[0m")
    elif c == "rm":
        cm = "rm+" + user_info
        # print(cm)
        client.sendall(cm.encode("utf-8"))
        res_list = eval(client.recv(1024))
        if len(res_list) == 0:
            print("33[1;37m无其它文件33[0m")
            client.sendall("error".encode("utf-8"))
        else:
            for i in res_list:
                print("33[1;37m文件:%s33[0m" % i)
            choice = input("请输入“rm”的文件名称：>>").strip()
            if choice in res_list:
                client.sendall(choice.encode("utf-8"))
                if client.recv(1024).decode() == "True":
                    print("33[1;37m文件删除成功33[0m")
                else:
                    print("33[1;37m文件删除失败33[0m")
            else:
                print("33[1;37m输入有误33[0m")
                client.sendall("error".encode("utf-8"))
                exit()
    else:
        print("33[1;37m输入有误33[0m")
        exit()

def view_file(client,user_info,name):
    '''
    客户端查看当前目录下文件的函数
    :param client: scoket客户端标志
    :param user_info: 客户端登陆的用户信息
    :param name: 客户端登陆的用户名字
    :return: none
    '''
    command = "view+"+user_info
    client.sendall(bytes(command,encoding="utf-8"))
    dirs = client.recv(1024)
    # print(dirs,"1111111111111111")
    if dirs.decode() == "False":
        dir = []
    else:
        dir = eval(str(dirs,encoding="utf-8"))
    files = client.recv(1024)
    file = eval(str(files, encoding="utf-8"))
    client.sendall("true".encode("utf-8"))
    storage = str(client.recv(1024).decode())
    # print(storage)
    if len(file) == 0 and len(dir) == 0:
        print("33[1;31m当前目录下暂无文件33[0m".center(40, "-"))
    else:
        print("33[1;33m当前目录包含以下文件内容33[0m".center(30,"*"))
        print("33[1;35m磁盘大小：%skb33[0m" % storage)
        for j in dir:
            print("33[1;35m目录：%s33[0m"%j)
        for i in file:
            print("33[1;35m文件：%s33[0m"%i)
        print("".center(33,"*"))

def operate(client,user_info,name):
    '''
    客户端操作主函数
    :param client: scoket客户端标志
    :param user_info: 客户端登陆的用户信息
    :param name: 客户端登陆的用户名字
    :return: none
    '''
    dic = {"1":upload,"2":download,"4":view_file,"3":switch}
    info = '''------操作指令------
    1、上传文件
    2、下载文件
    3、切换目录操作
    4、查看目录下文件
    5、退出
    '''
    while True:
        print("33[1;33m%s33[0m" % info)
        choice = input("请输入你要操作的命令：>>>").strip()
        if choice.isdigit() and 0 < int(choice) <= len(dic):
            dic.get(choice)(client,user_info,name)
        elif choice.isdigit() and int(choice) == 5:
            break
        else:
            print("33[1;31m输出错误33[0m".center(40, "-"))

def com_parse(client,com):
    '''
    客户端用户登陆注册命中解析函数
    :param client: 客户端scoket标志
    :param com: 命令
    :return: 登陆成功返回True，否则False
    '''
    # print(com)
    client.sendall(bytes(com,encoding="utf-8"))
    re = client.recv(4096)
    if str(re,encoding="utf-8") == "Success":
        return True
    elif str(re, encoding="utf-8") == "Success":
        return False

def login(client,data):
    '''
    客户端用户登陆函数
    :param client: 客户端scoket标志
    :param data: 数据
    :return: none
    '''
    name = input("请输入您的名字：>>>").strip()
    psd = input("请输入密码：>>>").strip()
    user_info = name+"+"+psd
    com = "login+"+user_info
    # com_parse(client, com)
    if com_parse(client,com):
        print("33[1;31m登陆成功33[0m")
        operate(client,user_info,name)
    else:
        print("33[1;31m登陆出现异常33[0m")

def register(client,data):
    '''
    客户端用户注册函数
    :param client: 客户端scoket标志
    :param data: 数据
    :return: none
    '''
    name = input("请输入您的名字：>>>").strip()
    psd = input("请输入密码：>>>").strip()
    com = "register+" + name + "+" + psd
    if com_parse(client,com):
        print("33[1;31m注册成功33[0m")
        user_info = name + "+" + psd
        operate(client, user_info, name)
    else:
        print("33[1;31m注册出现异常33[0m")

def quit(client,data):
    '''
    程序退出函数
    :param client: 客户端scoket标志
    :param data: 用户数据
    :return: none
    '''
    exit()

def main_func(client,data):
    '''
    客户端主菜单函数
    :param client: 客户端scoket标志
    :param data: 数据
    :return: none
    '''
    dic = {"1":login,"2":register,"3":quit}
    info = '''------用户登录界面------*{0}*
        1、登陆
        2、注册
        3、退出
    '''.format(data)
    print("33[1;33m%s33[0m"%info)
    what = input("你要干嘛？>>>").strip()
    if what.isdigit() and 0 < int(what) <= len(dic):
        dic.get(what)(client,data)
    else:
        print("33[1;31m输出错误33[0m".center(40,"-"))

def progressbar(cur, total):
    '''
    进度条处理函数
    :param cur: 当前文件内容长度
    :param total: 总长度
    :return: none
    '''
    percent = '{:.2%}'.format(cur / total)
    sys.stdout.write('
')
    sys.stdout.write('[%-50s] %s' % ('=' * int(math.floor(cur * 50 / total)), percent))
    # print('[%-50s] %s
' % ('=' * int(math.floor(cur * 50 / total)), percent),)
    sys.stdout.flush()
    time.sleep(0.01)
    if cur == total:
        sys.stdout.write('
')

if __name__ == '__main__':
    client = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    client.connect(("localhost",PORT))
    client.send("True".encode("utf-8"))
    # print("True 发送成功")
    # main_func(client,client.recv(1024))
    main_func(client,"connect")
    client.close()

2、FTPServer/conf/settings.py

import os

basedir = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
user_home = "%s/FTPServer/home"%basedir
user_info = "%s/db"%basedir

# print(user_home)
# print(user_info)
HOST = "0.0.0.0"
PORT = 9998

3、FTPServer/src/common.py

from __future__ import division
import logging,os,pickle,sys,uuid,math,time
frame = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(frame)
# from conf import setting
#
# def sys_logging(content,levelname):
#     '''
#     程序记录日志函数
#     :param content: 日志的内容
#     :param levelname: 日志的等级
#     :return: none
#     '''
#     _filename = os.path.join(setting.log_dir,"log_sys.log")
#     log = logging.getLogger(_filename)
#     logging.basicConfig(filename=_filename,level=logging.INFO,format='%(asctime)s-%(levelname)s-%(message)s', datefmt='%m/%d/%Y %I:%M:%S %p')
#     if levelname == 'debug':
#         logging.debug(content)
#     elif levelname == 'info':
#         logging.info(content)
#     elif levelname == 'warning':
#         logging.warning(content)
#     elif levelname == 'error':
#         logging.error(content)
#     elif levelname == 'critical':
#         logging.critical(content)

def show(msg,msg_type):
    '''
    程序不同信息打印的字体颜色
    :param msg: 打印信息
    :param msg_type: 打印信息的类型
    :return: none
    '''
    if msg_type == "info":
        show_msg = "33[1;35m%s33[0m"%msg
    elif msg_type == "error":
        show_msg = "33[1;31m%s33[0m"%msg
    elif msg_type == "msg":
        show_msg = "33[1;37m%s33[0m"%msg
    else:
        show_msg = "33[1;32m%s33[0m"%msg
    print(show_msg)

def progressbar(cur, total):
    '''
    进度条输出函数
    :param cur: 目前的长度
    :param total: 总共的长度
    :return: none
    '''
    percent = '{:.2%}'.format(cur / total)
    sys.stdout.write('
')
    sys.stdout.write('[%-50s] %s' % ('=' * int(math.floor(cur * 50 / total)), percent))
    # print('[%-50s] %s
' % ('=' * int(math.floor(cur * 50 / total)), percent),)
    sys.stdout.flush()
    time.sleep(0.01)
    if cur == total:
        sys.stdout.write('
')

4、FTPServer/src/Server_start.py

import socketserver,os,sys
Base_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(Base_dir)
from conf import settings
from common import show
from user import User

class FTPserver(socketserver.BaseRequestHandler):
    '''
    服务端类
    '''
    def handle(self):
        '''
        重构handle
        :return: none
        '''
        if self.request.recv(1024) == b'True':
            show("收到{0}的连接请求，正在通信中。。。".format(self.client_address),"info")
        # try:
            while True:
                self.cmd = self.request.recv(4069)
                # print(self.cmd)
                if not self.cmd:
                    break
                elif self.cmd == b'':
                    break
                else:
                    data = str(self.cmd.decode(encoding="utf-8"))
                    res = data.split("+")
                    if hasattr(self,res[0]):
                        func = getattr(self,res[0])
                        func(res)
                    else:
                        show("wrong action","error")
        # except Exception as e:
        #     print(e)
        #     show("客户端发生错误","erroe")

    def login(self,res):
        '''
        登陆函数
        :param res: 命令结果
        :return: none
        '''
        show("收到客户端登陆的请求，正在登陆。。。", "msg")
        name = res[1]
        psd = res[2]
        user = User(name, psd)
        sign = user.login()
        if sign:
            self.request.sendall(bytes("Success", encoding="utf-8"))
        else:
            self.request.sendall(bytes("Failure", encoding="utf-8"))

    def register(self,res):
        '''
        注册
        :param res: 命令结果
        :return: none
        '''
        show("收到客户端注册的请求，正在注册。。。", "msg")
        name = res[1]
        psd = res[2]
        user = User(name, psd)
        if user.register():
            self.request.sendall(bytes("Success", encoding="utf-8"))
        else:
            self.request.sendall(bytes("Failure", encoding="utf-8"))

    def view(self,res):
        '''
        查看当前目录下文件函数
        :param res: 命令结果
        :return: none
        '''
        show("收到客户端查看当前目录文件的请求。。。", "msg")
        name = res[1]
        psd = res[2]
        user = User(name, psd)
        dirs,files = user.view_file()
        # print(dirs,files)
        dir = str(dirs)
        file = str(files)
        if len(dirs) == 0:
            self.request.sendall("False".encode("utf-8"))
        else:
            self.request.sendall(bytes(dir, encoding="utf-8"))
        self.request.sendall(bytes(file, encoding="utf-8"))
        self.request.recv(1024)
        dic = User.info_read(name)
        storage = str(dic["storage"])
        # print(storage,type(storage))
        self.request.sendall(bytes(storage, encoding="utf-8"))
        show("当前目录文件查看或创建成功", "info")

    def upload(self,res):
        '''
        上传文件函数
        :param res: 命令结果
        :return: none
        '''
        show("收到客户端上传文件的请求。。。", "msg")
        name = res[1]
        filename = res[3]
        self.request.sendall(bytes("True", encoding="utf-8"))
        res = int(self.request.recv(1024).decode())
        # print(res,"nice")
        if User.receive(filename, name, res,self.request):
            self.request.sendall(bytes("True", encoding="utf-8"))
        else:
            self.request.sendall(bytes("False", encoding="utf-8"))

    def download(self,res):
        '''
        下载文件函数
        :param res: 命令结果
        :return: none
        '''
        show("收到客户端下载文件的请求。。。", "msg")
        name = res[1]
        psd = res[2]
        user = User(name, psd)
        dirs,files = user.view_file()
        file = str(files)
        self.request.sendall(bytes(file, encoding="utf-8"))
        res = self.request.recv(1024).decode()
        # print(str(res))
        if User.download_file(res,name,self.request):
            show("文件下载成功", "info")
        else:
            show("文件下载失败", "error")

    def cd(self,res):
        '''
        “cd”函数
        :param res: 命令结果
        :return: none
        '''
        show("收到客户端“cd”的请求。。。", "msg")
        name = res[1]
        psd = res[2]
        user = User(name,psd)
        res = user.cd_command(self.request)
        dirs = str(res)
        self.request.sendall(str(dirs).encode("utf-8"))
        dir1 = self.request.recv(1024).decode()
        if dir1 == "error":
            show("客户端输入错误","error")
            self.request.close()
        else:
            sign = user.cd_dir(self.request,dir1,name)
            # print(sign)
            self.request.sendall(str(sign).encode("utf-8"))

    def mkdir(self,res):
        show("收到客户端“mkdir”的请求。。。", "msg")
        name = res[1]
        psd = res[2]
        user = User(name,psd)
        dir_name = res[3]
        # print(dir_name)
        sign = user.mkdir(self.request,dir_name)
        # print(sign)
        if sign:
            self.request.sendall("True".encode("utf-8"))
        else:
            self.request.sendall("False".encode("utf-8"))

    def rm(self,res):
        show("收到客户端“rm”的请求。。。", "msg")
        name = res[1]
        psd = res[2]
        user = User(name,psd)
        files = user.rm(self.request)
        # print(files)
        self.request.sendall(str(files).encode("utf-8"))
        file_name = self.request.recv(1024).decode()
        if file_name == "error":
            show("客户端不稳定","error")
        else:
            sign = user.rm_file(self.request,file_name)
            if sign:
                show("文件删除成功", "info")
                self.request.sendall("True".encode("utf-8"))
            else:
                self.request.sendall("False".encode("utf-8"))

if __name__ == '__main__':
    show("等待客户端连接。。。", "info")
    server = socketserver.ThreadingTCPServer(("localhost",settings.PORT),FTPserver)
    server.serve_forever()

5、FTPServer/src/user.py

import os,sys,pickle,socket,time,random,hashlib
Base_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(Base_dir)
from conf import settings
from common import show,progressbar

class User(object):
    '''
    用户类
    '''
    def __init__(self,username,psd):
        self.name = username
        self.password = psd
        self.home_path = settings.user_home + "/" +self.name

    def login(self):
        '''
        用户登陆方法
        :return:
        '''
        user_dic = User.info_read(self.name)
        print(user_dic,"qqqq")
        if user_dic.get(self.name) == self.password:
            show("登陆成功","info")
            user_dic["dir"] = self.home_path
            User.info_write(self.name,user_dic)
            return True
        else:
            show("登陆失败，用户名或密码错误","error")
            return False

    def register(self):
        '''
        用户注册方法
        :return:
        '''
        dic = {}
        dic[self.name] = self.password
        dic["storage"] = random.randint(10240,20480)
        dic["dir"] = self.home_path
        if User.info_write(self.name,dic):
            show("注册成功","info")
            os.mkdir(self.home_path)
            os.mkdir("%s/others" % self.home_path)
            with open("%s空白文件" % self.home_path, "w") as f:
                f.write("空白文件")
            return True
        else:
            show("注册失败","error")
            return False

    def view_file(self):
        '''
        查看当前目录下文件
        :return: 目录下文件名组成的列表
        '''
        if not os.path.exists(self.home_path):
            os.mkdir(self.home_path)
            os.mkdir("%s/others"%self.home_path)
            with open("%s空白文件"%self.home_path,"w") as f:
                f.write("空白文件")
        user_dic = User.info_read(self.name)
        if user_dic["dir"] == os.path.join(os.path.join(Base_dir, "home"), self.name):
            dir = os.path.join(os.path.join(Base_dir, "home"), self.name)
        else:
            dir = user_dic["dir"]
        for root, dirs, files in os.walk(dir):
            return dirs,files

    def cd_command(self,con):
        for root,dirs,files in os.walk(self.home_path):
            return dirs

    def cd_dir(self,con,dir,name):
        next_dir = self.home_path+"/" +dir
        user_dic = User.info_read(name)
        # print(user_dic)
        user_dic["dir"] = next_dir
        User.info_write(name,user_dic)
        return True

    def mkdir(self,con,res_dir):
        user_dic = User.info_read(self.name)
        if user_dic["dir"] == os.path.join(os.path.join(Base_dir, "home"), self.name):
            dir = os.path.join(os.path.join(Base_dir, "home"), self.name)
        else:
            dir = user_dic["dir"]
        next_dir = dir+"/" +res_dir
        if os.path.exists(next_dir):
            show("该目录已存在", "error")
            return False
        else:
            os.mkdir(next_dir)
            show("目录创建成功","info")
            return True

    def rm(self,con):
        user_dic = User.info_read(self.name)
        if user_dic["dir"] == os.path.join(os.path.join(Base_dir, "home"), self.name):
            dir = os.path.join(os.path.join(Base_dir, "home"), self.name)
        else:
            dir = user_dic["dir"]
        for root,dirs,files in os.walk(dir):
            return files

    def rm_file(self,con,file_name):
        user_dic = User.info_read(self.name)
        if user_dic["dir"] == os.path.join(os.path.join(Base_dir, "home"), self.name):
            dir = os.path.join(os.path.join(Base_dir, "home"), self.name)
        else:
            dir = user_dic["dir"]
        os.remove(dir+"/" +file_name)
        return True

    @staticmethod
    def download_file(filename,name,con):
        '''
        下载文件静态方法
        :param filename: 文件名
        :param name: 用户名
        :param con: 标志
        :return: none
        '''
        user_dic = User.info_read(name)
        if user_dic["dir"] == os.path.join(os.path.join(Base_dir, "home"), name):
            user_dir = os.path.join(os.path.join(Base_dir, "home"), name)
        else:
            user_dir = user_dic["dir"]
        dir = os.path.join(user_dir, filename)
        f = open(dir,"rb")
        m = hashlib.md5()
        data = f.read()
        m.update(data)
        a = str(len(data))+"+"+ m.hexdigest()
        # print(a)
        con.sendall(bytes(a, encoding="utf-8"))
        con.sendall(data)
        f.close()
        return True

    @staticmethod
    def receive(filename,name,res,con):
        '''
        接收文件静态方法
        :param filename: 文件名
        :param name: 用户名
        :param con: 标志
        :return: none
        '''
        user_dic = User.info_read(name)
        if user_dic["dir"] == os.path.join(os.path.join(Base_dir, "home"), name):
            dir = os.path.join(os.path.join(os.path.join(Base_dir, "home"), name), filename)
        else:
            dir_name = user_dic["dir"]
            dir = os.path.join(dir_name, filename)
            # print(res,user_dic["storage"])
        if res/1024 < user_dic["storage"]:
            con.sendall("ok".encode("utf-8"))
            length = 0
            f =  open(dir, "wb")
            md5 = hashlib.md5()
            while length < res:
                if res - length > 1024:  # 要收不止一次
                    size = 1024
                else:  # 最后一次了，剩多少收多少
                    size = res - length
                    # print("最后一次剩余的:", size)
                data = con.recv(size)
                length += len(data)
                md5.update(data)
                f.write(data)
                progressbar(length, res)
            else:
                new_md5 = md5.hexdigest()
                f.close()
            # Num = User.download_Progress(res, length, Num)
            or_md5 = con.recv(1024)
            # print(new_md5)
            # print(or_md5)
            if new_md5 == or_md5.decode():
                show("文件下载成功", "info")
                return True
            else:
                show("文件不一致", "error")
                return False
        elif res/1024 > user_dic["storage"]:
            con.sendall("no".encode("utf-8"))
            show("磁盘空间不足", "error")
            return False

    @staticmethod
    def info_read(name):
        '''
        读取用户数据的静态方法
        :param name: 用户名
        :return: 字典
        '''
        user_dir = os.path.join(settings.user_info,name)
        if os.path.exists(user_dir):
            with open(user_dir,"rb") as f:
                dic = pickle.load(f)
                return dic
        else:
            print("用户数据为空")

    @staticmethod
    def info_write(name,dic):
        '''
        写入用户数据的静态方法
        :param name:用户名
        :param dic:用户信息字典
        :return:True
        '''
        user_dir = os.path.join(settings.user_info, name)
        with open(user_dir,"wb") as f:
            pickle.dump(dic,f)
            return True

六、界面显示