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 socketimport jsonimport osimport hashlibCODE = { '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 socketserverimport jsonimport osimport shutilCODE = { '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': passif __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。