FTP上传下载文件(函数简易版)
# 服务端
import socket
import json
import hashlib
import struct
import os
user_dic = {
'太上老君': '123456',
'元始天尊': '123456',
'通天教主': '123456'
}
server = socket.socket()
server.bind(('192.168.13.19', 2021))
server.listen(5)
conn, addr = server.accept()
def login(): # 登录
time = 3
while time > 0:
username, psw = conn.recv(1024).decode('utf-8').split('|')
if user_dic.get(username) == psw:
conn.send('True'.encode('utf-8'))
return True
else:
time -= 1
conn.send(str(time).encode('utf-8'))
return False
def up(): # 上传
while 1:
len_head_dic = struct.unpack('i', conn.recv(4))[0]
head_dic = json.loads(conn.recv(len_head_dic).decode('utf-8'))
file_name = head_dic['file_name']
file_md5 = head_dic['file_md5']
file_size = head_dic['file_size']
file_path = os.path.join(os.path.dirname(__file__), '上传/', file_name)
with open(file_path, mode='wb') as f:
md5 = hashlib.md5()
len_data = 0
while len_data < file_size:
data = conn.recv(1024)
len_data += len(data)
md5.update(data)
f.write(data)
data_md5 = md5.hexdigest()
if data_md5 == file_md5:
conn.send('True'.encode('utf-8'))
return True
else:
conn.send('False'.encode('utf-8'))
def down(): # 下载
file_path = os.path.join(os.path.dirname(__file__), '上传/')
file_lst = os.listdir(file_path)
file_show = ''
for n, file in enumerate(file_lst, 1):
file_show += f'序号:{n} 文件名:{file}
'
to_client = f'可下载文件:
{file_show}'.encode('utf-8')
conn.send(to_client)
while 1:
from_client = conn.recv(1024).decode('utf-8')
try:
with open(os.path.join(file_path, file_lst[int(from_client) - 1]), mode='rb') as f:
file_size = 0
md5 = hashlib.md5()
while 1:
data = f.read(1024)
if data:
md5.update(data)
file_size += len(data)
else:
break
file_md5 = md5.hexdigest()
conn.send('True'.encode('utf-8'))
except Exception:
conn.send('False.'.encode('utf-8'))
continue
else:
head_dic = {
'file_md5': file_md5,
'file_name': file_lst[int(from_client) - 1],
'file_size': file_size
}
head_dic_json_bytes = json.dumps(head_dic).encode('utf-8')
len_head_dic_bytes = struct.pack('i', len(head_dic_json_bytes))
conn.send(len_head_dic_bytes)
conn.send(head_dic_json_bytes)
with open(os.path.join(file_path, file_lst[int(from_client) - 1]), mode='rb') as f:
while 1:
data = f.read(1024)
if data:
conn.send(data)
else:
return True
def run(): # 主循环
if login():
while 1:
from_client = conn.recv(1024).decode('utf-8')
if from_client == '1':
up()
elif from_client == '2':
down()
elif from_client == '3':
break
if __name__ == '__main__':
run()
# 客户端
import socket
import hashlib
import json
import struct
import os
client = socket.socket()
client.connect(('192.168.13.19', 2021))
def login(): # 登录
while 1:
username = input('请输入账号:').strip()
psw = input('请输入密码:').strip()
to_server = f'{username}|{psw}'.encode('utf-8')
client.send(to_server)
from_server = client.recv(1024).decode('utf-8')
if from_server == 'True':
return True
elif from_server == '0':
return False
else:
print(f'账号或密码错误,还有{from_server}次机会')
def up(): # 上传
print('欢迎进入上传页面~~~~~~~~~~~~~~~~~~')
while 1:
file_path = input('请输入上传的文件路径:').strip()
try:
with open(file_path, mode='rb') as f:
file_size = 0
md5 = hashlib.md5()
while 1:
data = f.read(1024)
if data:
md5.update(data)
file_size += len(data)
else:
break
file_md5 = md5.hexdigest()
except Exception:
print('路径错误,请重新输入.')
continue
else:
head_dic = {
'file_md5': file_md5,
'file_name': os.path.basename(file_path),
'file_size': file_size
}
head_dic_json_bytes = json.dumps(head_dic).encode('utf-8')
len_head_dic_bytes = struct.pack('i', len(head_dic_json_bytes))
client.send(len_head_dic_bytes)
client.send(head_dic_json_bytes)
with open(file_path, mode='rb') as f:
while 1:
data = f.read(1024)
if data:
client.send(data)
else:
break
from_server = client.recv(1024).decode('utf-8')
if from_server == 'True':
print('上传成功.')
return True
else:
print('上传失败.')
def down(): # 下载
print('欢迎进入下载页面~~~~~~~~~~~~~~~~~~')
from_server = client.recv(1024).decode('utf-8')
print(from_server)
while 1:
choice = input('请输入选择的序号:').strip().encode('utf-8')
client.send(choice)
return_from_server = client.recv(1024).decode('utf-8')
if return_from_server == 'True':
len_head_dic = struct.unpack('i', client.recv(4))[0]
head_dic = json.loads(client.recv(len_head_dic).decode('utf-8'))
file_name = head_dic['file_name']
file_md5 = head_dic['file_md5']
file_size = head_dic['file_size']
file_path = os.path.join(os.path.dirname(__file__), '下载/', file_name)
with open(file_path, mode='wb') as f:
md5 = hashlib.md5()
len_data = 0
while len_data < file_size:
data = client.recv(1024)
len_data += len(data)
md5.update(data)
f.write(data)
data_md5 = md5.hexdigest()
if data_md5 == file_md5:
print('下载成功.')
return True
else:
print('下载失败.')
else:
print('输入错误,请重新输入.')
def run(): # 主循环
if login():
print('登陆成功~~~~~~~')
print('欢迎来到主页面~~~~~~')
while 1:
print('[1]上传 [2]下载 [3]退出')
choice = input('请输入选项:').strip()
client.send(choice.encode('utf-8'))
if choice == '1':
up()
elif choice == '2':
down()
elif choice == '3':
print('正在退出...')
break
else:
print('输入错误,请重新输入')
else:
print('登录失败,正在退出....')
if __name__ == '__main__':
run()