功能：
1、获取文件列表
2、上传文件
3、下载文件
4、退出
第一部分，TftpServer部分。
①导入相关模块
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from socket import *import osimport signalimport sysimport time |
②确定文件路径
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# 文件库路径 FILE_PATH = "/home/tarena/" |
③建立一个类，用来实现服务器功能模块
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class TftpServer(object): def __init__(self, connfd): self.connfd = connfd def do_list(self): # 获取列表 file_list = os.listdir(FILE_PATH) # 如果对应的路径内没有文件,返回Empty if not file_list: self.connfd.send('Empty'.encode()) return # 路径存在文件,向客户端发送OK else: self.connfd.send(b'OK') time.sleep(0.1) files = "" for file in file_list: # 排除以'.'开头的隐藏文件 if file[0] != '.' and \ os.path.isfile(FILE_PATH + file): files = files + file + '#' # 返回文件列表 self.connfd.send(files.encode()) # 下载文件功能 def do_get(self, filename): try: fd = open(FILE_PATH + filename, 'rb') except: self.connfd.send("File doesn't exist".encode()) return # 如果能正常打开,发送OK self.connfd.send(b"OK") time.sleep(0.1) # 开始发送文件 try: for line in fd: self.connfd.send(line) fd.close() except Exception as e: print(e) time.sleep(0.1) self.connfd.send(b'##') print("File send over") # 开始上传文件 def do_put(self, filename): try: fd = open(FILE_PATH + filename, 'w') except: self.connfd.send("Some error") # 如果能正常打开文件,则发送OK self.connfd.send(b'OK') # 开始发送 while True: # data为文件内容 data = self.connfd.recv(1024).decode() if data == "##": break fd.write(data) fd.close() print("上传完毕") |
④主流程控制
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def main(): # 创建套接字/地址/端口 HOST = '0.0.0.0' PORT = 8888 ADDR = (HOST, PORT) sockfd = socket() # 设置端口可重用 sockfd.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1) # 绑定地址 sockfd.bind(ADDR) # 设置监听队列大小 sockfd.listen(5) signal.signal(signal.SIGCHLD, signal.SIG_IGN) print("Listen to port 8888....") while True: try: connfd, addr = sockfd.accept() except KeyboardInterrupt: sockfd.close() sys.exit("Server exit") except Exception as e: print(e) continue print("Client login:", addr) # 创建父子进程 pid = os.fork() if pid < 0: print("Process creation failed") continue elif pid == 0: # 子进程负责请求接收和发送,所以节省资源,关闭连接套字 sockfd.close() tftp = TftpServer(connfd) # 接收客户端请求 while True: data = connfd.recv(1024).decode() if not data: continue # 调用do_list方法获取文件列表 elif data[0] == 'L': tftp.do_list() # data ==> G filename # 文件名以G开头,以空格为间隔发送过来 elif data[0] == 'G': filename = data.split(' ')[-1] tftp.do_get(filename) elif data[0] == 'P': filename = data.split(' ')[-1] tftp.do_put(filename) elif data[0] == 'Q': print("客户端退出") sys.exit(0) else: connfd.close() continue |
⑤运行主控制流程，等待客户端连接
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if __name__ == "__main__": main() |
第二部分，TftpClient
①导入相关模块
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from socket import *import sys import time |
②实现基本的请求功能
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class TftpServer(object): def __init__(self, sockfd): self.sockfd = sockfd def do_list(self): self.sockfd.send(b"L") # 发送请求类型 # 等待接收服务器端确认 data = self.sockfd.recv(1024).decode() if data == 'OK': data = self.sockfd.recv(4096).decode() files = data.split('#') for file in files: print(file) print("%%%%%There is file list%%%%%\n") else: # 失败的原因由服务器发送过来 print(data) def do_get(self, filename): self.sockfd.send(('G '+filename).encode()) data = self.sockfd.recv(1024).decode() if data == 'OK': fd = open(filename, 'w') while True: data = self.sockfd.recv(1024).decode() if data == "##": break fd.write(data) fd.close() print("%s Download over\n" % filename) else: print(data) def do_put(self, filename): try: fd = open(filename, 'rb') except: print("There is no such file") return self.sockfd.send(("P " + filename).encode()) data = self.sockfd.recv(1024).decode() if data == 'OK': for line in fd: self.sockfd.send(line) fd.close() time.sleep(0.1) self.sockfd.send(b'##') print("%s upload over" % filename) else: print(data) def do_quit(self): self.sockfd.send(b'Q') |
③主流程控制
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# 套接字连接def main(): if len(sys.argv) < 3: print("argv is error") return HOST = sys.argv[1] PORT = int(sys.argv[2]) ADDR = (HOST, PORT) sockfd = socket() sockfd.connect(ADDR) tftp = TftpServer(sockfd) # tftp对象调用请求方法 while True: print("=======命令选项========") print("******* list *********") print("*******get file ******") print("*******put file ******") print("******* quit *********") print("======================") cmd = input("请输入命令>>") if cmd.strip() == 'list': tftp.do_list() elif cmd[:3] == "get": filename = cmd.split(' ')[-1] tftp.do_get(filename) elif cmd[:3] == "put": filename = cmd.split(' ')[-1] tftp.do_put(filename) elif cmd.strip() == "quit": tftp.do_quit() sockfd.close() sys.exit("Welcome") else: print("Enter the right order!!!") continue |
④运行客户端
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if __name__ == "__main__": main() |
第三部分，展示
一下就不做逐一显示，如有问题，烦请之处修正，共同进步！
原文链接：https://blog.csdn.net/weixin_42122355/article/details/80791857
