FTP

 

1、作业需求

开发简单的FTP:

1. 用户登陆

2. 上传/下载文件

3. 不同用户家目录不同

4. 查看当前目录下文件

5. 充分使用面向对象知识

2、流程图

3、目录结构

 

4、代码区

bin目录下的start.py程序执行文件

# -*- coding:utf-8 -*-
# Author:D.Gray
import os,sys
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(BASE_DIR)
from core import ftp_client
fc = ftp_client.FTP_client()
start_client.py
# -*- coding:utf-8 -*-
# Author:D.Gray
import os,sys
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(BASE_DIR)
from core import ftp_server
fs = ftp_server.FTP_server()
start_server.py

conf目下的setting.py系统配置文件

# -*- coding:utf-8 -*-
# Author:D.Gray
import os,sys,socket
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
#IP地址和端口
IP_PORT = ("localhost",6969)
#数据文件路径
USER_FILE = BASE_DIR + r"dbuser.db"
#用户文件目录
USER_HOME = BASE_DIR
setting.py

core目录下主程序文件

# -*- coding:utf-8 -*-
# Author:D.Gray
import os,sys,socket
from conf import setting
from core import ftp_server
from core import users
class FTP_client(object):
def __init__(self):
self.client = setting.socket.socket()
self.client.connect(setting.IP_PORT)
self.user_obj = users.Users()
self.help_info = {
"get":"用于上传文件,例如:get readme.txt 即 get 文件名",
"put":"用于下载文件,例如:put readme.txt 即 put 文件名",
'dir':"用于显示当前目录下文件或文件详细信息 格式 ls "
}
if self.auth():
self.start()
def auth(self):
'''
用户登录验证函数
:return:
'''
while True:
username = input("请输入用户名>>>:").strip()
pwd = input("请输入用户密码>>>:").strip()
auth_info = 'auth %s %s'%(username,pwd) #格式化输出 auth 用户名 密码
self.client.send(auth_info.encode()) #将格式化后的内容发送给服务端
back_res = self.client.recv(1024).decode()
if back_res == "ok":
print('认证成功')
user = self.user_obj.get_user(username)
self.current_user = username
self.current_pwd = pwd
self.current_path = user['home']
self.current_dir = back_res[1]
return True
elif back_res == "Not password":
print("33[31;1m密码不正确33[0m")
else:
print("33[31;1m用户不存在33[0m")
def start(self):
'''
输入指令上传下载文件函数
:return:
'''
while True:
user_input = input('%s>>>:'%self.current_user).strip()
if len(user_input) == 0:continue
user_input = user_input.split()
if user_input[0] == 'q':break
if hasattr(self,user_input[0]):
func = getattr(self,user_input[0])
func(user_input)
else:
print("33[31;1m请输入有效指令33[0m")
continue
def put(self,cmd):
'''
从服务器端下载文件函数
:param cmd:
:return:
'''
print('in the put:',cmd)
send_server_info = '%s %s'%(cmd[0],cmd[1]) #格式化输出['方法','文件名']
self.client.send(send_server_info.encode()) #将格式化输出内容发送给服务器端
server_back = self.client.recv(1024).decode() #接收服务器回调结果
print("接收服务器回调信息:",server_back)
if server_back == "302":
print('33[31;1m文件不存在33[0m')
else:
file_totle_size = int(server_back) #从服务器端接收文件大小
print("您要下载的文件大小为:%sByte"%file_totle_size)
self.client.send('可以开始下载了...'.encode())
rever_file_size = 0 #接收到的文件大小
file_name_path = setting.USER_HOME + self.current_path + '\user_home\' + cmd[1]
#print(file_name_path)
with open(file_name_path,"wb") as f:
while rever_file_size < file_totle_size:
if file_totle_size - rever_file_size < 1024: #当剩余文件大小<1024 全部接收文件
size = file_totle_size - rever_file_size
else:
size = 1024
data = self.client.recv(size) #当剩余文件<1024全部接收文件,当剩余文件>1024每次只接收1024
rever_file_size += len(data) #每次接收数据时自动累计rever_file_size值
print("已接收%sByte"%rever_file_size)
f.write(data)
else:
print('接受完毕')
def get(self,cmd):
'''
本地上次文件给服务器端
:param cmd: 接收用户通过start函数输入的操作指令
:return:
'''
print(cmd)
file_path = setting.USER_HOME + self.current_path +'\user_home\' + cmd[1]
if os.path.isfile(file_path):
file_totle_size = os.stat(file_path).st_size
print('您要上传文件大小为【%sByte】'%file_totle_size)
file_info = '%s %s %s'%(cmd[0],cmd[1],file_totle_size) #格式化输出['操作指令','文件名','文件大小']
self.client.send(file_info.encode()) #将格式化输出内容发送给服务器端
server_back = self.client.recv(1024).decode() #接收回调信息
if server_back == "300":
print('可以上传文件了...')
send_file_size = 0
with open(file_path,'rb') as f:
while send_file_size != file_totle_size:
if file_totle_size-send_file_size <= 1024:
data = f.read(file_totle_size-send_file_size)
send_file_size += file_totle_size - send_file_size
else:
data = f.read(1024)
send_file_size += len(data)
print("已上传【%sByte】"%send_file_size)
self.client.send(data)
print("上传成功")
else:
print('33[31;1m文件不存在33[0m')
def dir(self,cmd):
'''
查看服务端目录文件信息
:param cmd:
:return:
'''
print(cmd)
send_server_info = '%s'%cmd[0] #格式化输出用户指令
 self.client.send(send_server_info.encode())
server_back = self.client.recv(1024).decode() #接收服务端回调
print("获取服务端回调信息:%s"%server_back)
self.client.send("ok".encode()) #发送给服务端'ok'
recv_size = 0
recv_data = b''
while recv_size < int(server_back):
data = self.client.recv(1024)
recv_data += data
recv_size = len(data)
print(recv_size)
else:
print(recv_data.decode())
def help(self,cmd):
'''
查看帮助文档函数
:param cmd:
:return:
'''
print(cmd)
d = self.help_info
print(d)
ftp_client.py
# -*- coding:utf-8 -*-
# Author:D.Gray
import os,sys,socket
from conf import setting
from core import ftp_client
from core import users
class FTP_server(object):
def __init__(self):
self.server = setting.socket.socket()
self.server.bind(setting.IP_PORT)
self.server.listen(5)
self.user_obj = users.Users() #导入users文件并实例化Users类
 self.start()
def start(self):
print("等待链接中...")
while True:
self.conn,self.addr = self.server.accept()
print("一个新的链接:%s %s"%(self.conn,self.addr))
while True:
self.data = self.conn.recv(1024) #接受客户端格式化输出内容
#print('data:',self.conn)
if not self.data:
print("客户端断开")
break
cmd_res = self.data.decode().split() #以列表形式获取用户输入的[[方法名],[文件名]]
cmd_action = cmd_res[0] #获取方法名
#print('in the start获取方法名:',cmd_action)
if hasattr(self,cmd_action): #判断用户输入的方法名是否存在
func = getattr(self,cmd_action) #执行对应的方法函数
func(cmd_res) #用户输入的[[方法名],[文件名]]传给方法函数
else:
print("33[31;1m请输入有效命令33[0m")
def auth(self,cmd):
#print('auth:',cmd) #接受客户端格式化输出的 auth 用户名 密码
user = self.user_obj.get_user(cmd[1]) #调用Users类中get_user方法,并把cmd[1](用户名)传参给get_user方法
print('in the ftp_server_auth:',user)
if user:
if user['password'] == cmd[2]:
self.current_user = user
self.current_path = user["home"]
self.user_home = setting.USER_HOME
self.conn.send(b"ok")
else:
self.conn.send(b"Not password")
else:
self.conn.send(b'Not username')
def put(self,cmd):
'''
上传文件函数
:param cmd: 接收用户输入的[[方法名],[文件名]]
:return:
'''
#print('in the put:',cmd)
file_name_path = self.user_home + self.current_path +'server_home\'+ cmd[1]
print('文件路径',file_name_path)
if os.path.isfile(file_name_path):
file_totle_size = os.stat(file_name_path).st_size #查看文件大小
self.conn.send(str(file_totle_size).encode()) #将文件大小发送给客户端
self.conn.recv(1024) #接收客户端消息
with open(file_name_path,'rb') as f:
for line in f: #循环遍历文件内容
self.conn.send(line) #并将文件内容发送给客户端
print("send done>>>")
else:
print('33[31;1m文件不存在33[0m')
self.conn.send('302'.encode())
def get(self,cmd):
'''
接收客户端上传文件函数
:param cmd:
:return:
'''
print(cmd)
file_path = self.user_home + self.current_path + 'server_home\' + cmd[1] #文件路径
file_totle_size = cmd[2] #接收客户端上传文件大小
file_totle_size = int(file_totle_size)
with open(file_path,'wb') as f:
self.conn.send('300'.encode()) #返回客户端参数300
revered_file_size = 0 #初始接收文件大小
while revered_file_size < file_totle_size: #开始接收客户端上传文件
if file_totle_size - revered_file_size <= 1024:
size = file_totle_size-revered_file_size
else:
size = 1024
data = self.conn.recv(size)
revered_file_size += len(data)
f.write(data)
else:
print("文件接收完毕")
def dir(self,cmd):
'''
查看服务端目录文件信息函数
:param cmd:
:return:
'''
print(cmd)
file_path = self.user_home + self.current_path + 'server_home\'
res = os.popen('%s %s'%(cmd[0],file_path)).read()
print('服务端文件目录信息:',res)
if len(res) == 0 :
res = 'cmd has not output'
self.conn.send(str(len(res)).encode()) #服务端发送目录文件大小给客户端
self.conn.recv(1024) #接收客户端回调信息 "ok"
self.conn.send(res.encode()) #服务端发送目录文件信息给客户端
ftp_server.py
#-*- Coding:utf-8 -*-
# Author: D.Gray
import os,sys,shelve
from conf import setting
class Users(object):
def __init__(self):
self.user_file = setting.USER_FILE
self.users_read = self.read_users()
def read_users(self):
print(self.user_file)
with open(self.user_file, 'r') as f:
user_read = eval(f.read())
return user_read
def get_users(self):
print(self.users_read)
return self.users_read
def get_user(self,username):
for user in self.users_read:
print('in the User_get_user:',user)
if user["username"] == username:
return user
users

db目录下的数据文件

{
"username":"alex",
"password":"admin",
"status":0,
"type":0,
"home":"home\alex",
"disk_quota":0.97
}
student_view
 
 
 
原文地址:https://www.cnblogs.com/gaodi2345/p/11412810.html