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超轻量级php框架startmvc

python基于FTP实现文件传输相关功能代码实例

更新时间:2020-08-01 08:24:02 作者:startmvc
这篇文章主要介绍了python基于FTP实现文件传输相关功能代码实例,文中通过示例代码介绍的

这篇文章主要介绍了python基于FTP实现文件传输相关功能代码实例,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

本实例有文件传输相关功能,包括:文件校验、进度条打印、断点续传

客户端示例:


import socket
import json
import os
import hashlib

CODE = {
 '1001':'重新上传文件'
}

def file_md5(file_path):
 obj = open(file_path,'rb')
 m = hashlib.md5()
 for line in obj:
 m.update(line)
 obj.close()
 return m.hexdigest()

def jdt(size,total_size):
 '''
 显示进度条
 '''
 val = int(size/total_size * 100)
 print('\r%s%%|%s' %(val,'#'*val,),end='')

def send_file(exist_size,file_total_size):
 '''
 发送文件
 :param exist_size: 开始读取字节的位置
 :param file_total_size: 文件大小
 :return:
 '''
 f = open(file_path, 'rb')
 f.seek(exist_size)
 send_size = exist_size
 while send_size < file_total_size:
 data = f.read(1024)
 sk.sendall(data)
 send_size += len(data)
 jdt(send_size,file_total_size)
 f.close()
 print('上传成功')

def upload(file_path):
 '''文件上传(含断点)'''
 file_path = '111.jpg'
 file_md5_val = file_md5(file_path)
 file_name = os.path.basename(file_path)
 file_size = os.stat(file_path).st_size

 cmd_dict = {'cmd': 'upload', 'file_name': file_name, 'size': file_size, 'md5': file_md5_val}
 upload_cmd_bytes = json.dumps(cmd_dict).encode('utf8')
 sk.sendall(upload_cmd_bytes)

 # 2.等待服务端相应
 response = json.loads(sk.recv(8096).decode('utf8'))
 if response['code'] == 1001:
 send_file(0,file_size)
 else: # 断点续传
 exist_size = response('size')
 send_file(exist_size,file_size)

sk = socket.socket()
sk.connect(('127.0.0.1',8001))

while 1:
 #upload|文件路径
 user_input = input('命令>>>')
 # 1、自定义协议{'cmd':'upload','file_name':'...'}
 cmd,file_path = user_input.split('|',maxsplit=1)
 if cmd == 'upload':
 upload(file_path)
 elif cmd == 'download':
 pass

服务端示例:


import socketserver
import json
import os
import shutil

CODE = {
 '1001':'重新上传文件'
}

def upload(cmd_dict,conn,username):
 '''服务端完成上传文件(含断点续传)'''
 # 2.获取文件信息
 file_md5 = cmd_dict['md5']
 file_name = cmd_dict['file_name']
 file_md5_path = os.path.join('home', username, file_md5)
 file_name_path = os.path.join('home', username, file_name)
 upload_file_size = cmd_dict['size']

 # 3.判断文件是否存在
 exist = os.path.exists(file_md5_path)
 if not exist: # 不续传
 # 3.1.1通知可以开始上传,已经准备好
 response = {'code': 1001}
 conn.sendall(json.dumps(response).encode('utf8'))

 # 3.1.2接收上传的文件内容
 f = open(file_md5_path, 'wb')
 recv_size = 0
 while recv_size < upload_file_size:
 data = conn.recv(1024)
 f.write(data) # 写到内存
 f.flush() # 刷到硬盘
 recv_size += len(data)
 f.close()

 # 3.1.3改文件名
 shutil.move(file_md5_path, file_name_path)

 else: # 存在就续传
 # 3.2续传 + 大小
 exist_size = os.stat(file_md5_path).st_size
 response = {'code': 1002, 'size': exist_size}
 conn.sendall(json.dumps(response).encode('utf8'))

 f = open(file_md5_path, 'ab')
 recv_size = exist_size
 while recv_size < upload_file_size:
 data = conn.recv(1024)
 f.write(data) # 写到内存
 f.flush() # 刷到硬盘
 recv_size += len(data)
 f.close()

 # 3.1.3改文件名
 shutil.move(file_md5_path, file_name_path)


class NBServer(socketserver.BaseRequestHandler):
 def handle(self):
 '''self.request是请求客户端的socket对象'''

 #1.接受命令
 upload_cmd_bytes = self.request.recv(8096)
 cmd_dict = json.loads(upload_cmd_bytes.decode('utf8'))

 if cmd_dict['cmd'] == 'upload':
 upload(cmd_dict,self.request,'zhangzijian')
 elif cmd_dict['cmd'] == 'download':
 pass

if __name__ == '__main__':
 server = socketserver.ThreadingTCPServer(('127.0.0.1',8001),NBServer)
 server.serve_forever()

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

python FTP 文件 传输