C/S架构的简单文件传输系统的实现

源码链接： https://github.com/GYgavin/python/blob/master/client.py https://github.com/GYgavin/python/blob/master/server.py

设计思路：

确定协议语言选择 设计函数构建连接发送文件

---

选择使用python的原因：

所需实现的功能比较简单，灵活性不需要太高，这样的程序用c语言编写起来太过于繁琐，用python代码量少，容易理解和修改。

实现思路:

1. Server端实现思路

Created with Raphaël 2.1.0 客户端请求连接 Tcp协议建立连接 接受处理command 判断请求指令 发送数据 数据传输完成 接收数据 数据传输完成 yes no

**备注：此处判断的结果yes和no分别代表判断得到客户端的get和put指令

2. Client端实现思路

Created with Raphaël 2.1.0 请求连接服务器 Tcp协议建立连接 发送动作请求命令 判断请求指令 发送数据 数据传输完成 接收数据 数据传输完成 yes no

备注：此处判断yes为put，no为get

---

实现代码:

服务端代码

#!/usr/bin/env python from socket import * import time HOST = '127.0.0.1' PORT = 9036 BUFSIZ = 1024000 ADDR = (HOST,PORT) def recv_file(filename): print 'Starting receive file...' filename = open(filename,'wb') tcpCliSock.send('File will be received!') while True: data = tcpCliSock.recv(4096000) if data == 'EOF': print 'File received successfully!' break filename.write(data) filename.close() def send_file(filename): print 'Starting send file...' tcpCliSock.send('File will be sent...') filename = open(filename,'rb') while True: data = filename.read(4096000) if not data: break tcpCliSock.send(data) filename.close() time.sleep(1) tcpCliSock.send('EOF') print 'send file success!' tcpSerSock = socket(AF_INET,SOCK_STREAM) tcpSerSock.bind(ADDR) tcpSerSock.listen(5) while True: print('waiting for connection...') tcpCliSock,addr = tcpSerSock.accept() print('Tcpserver have connected with :',addr) while True: command = tcpCliSock.recv(4096000) act,filename = command.split() if act == 'put': print 'receiving file from client,please waiting...' recv_file(filename) elif act == 'get': print 'sending file to client,please waiting...' send_file(filename) else: print 'Error:no command,please input put or get + filename' continue

客户端代码

#!/usr/bin/env python import socket import time HOST = '127.0.0.1' PORT = 9036 BUFSIZ = 1024000 ADDR = (HOST,PORT) tcpCliSock =socket.socket(socket.AF_INET,socket.SOCK_STREAM) def recv_file(filename): print 'transfer from:',ADDR filename = open(filename,'wb') while True: data = tcpCliSock.recv(4096) if data == 'EOF': print 'File received successfully!' break filename.write(data) filename.close def send_file(filename): print 'transfer from:',ADDR filename = open(filename,'rb') while True: data = tcpCliSock.recv(4096000) if data == 'EOF': print 'File received successfully!' break filename.write(data) filename.close def send_file(filename): filename = open(filename,'rb') while True: data = filename.read(4096000) if not data: break tcpCliSock.send(data) filename.close() time.sleep(1) tcpCliSock.send('EOF') print 'send file success!' try: tcpCliSock.connect(ADDR) while True: client_command = raw_input('File transfer >>') if not client_command: continue tcpCliSock.send(client_command) act,filename = client_command.split() if act == 'put': print 'File sending...' send_file(filename) elif act == 'get': print 'File receiving...' recv_file(filename) else: print 'command error!' except socket.error,e: print 'ERROR',e finally: tcpCliSock.close()

---

运行结果：

---

小编能力有限，水平不高，感谢大家支持，关注！