如何用Python编写TCP文件传输程序？

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几天前已经讲过UDP协议下大文件传输的Python实现代码，今天再来实现TCP协议下大文件传输的Python代码。TCP和UDP的实现过程有所不同。

实现代码：

服务端：pythonimport socket

def start_server(host='127.0.0.1', port=12345): server_socket=socket.socket(socket.AF_INET, socket.SOCK_STREAM) server_socket.bind((host, port)) server_socket.listen(5) print(Server is listening...) client_socket, client_address=server_socket.accept() print(Connected by, client_address) try: while True: data=client_socket.recv(1024) if not data: break print(Received:, data.decode()) finally: client_socket.close() server_socket.close()

if __name__==__main__: start_server()

客户端：pythonimport socket

def start_client(host='127.0.0.1', port=12345): client_socket=socket.socket(socket.AF_INET, socket.SOCK_STREAM) client_socket.connect((host, port)) message=Hello, Server! client_socket.sendall(message.encode()) client_socket.close()

if __name__==__main__: start_client()

请注意，以上代码仅用于示例，实际应用中需要根据具体需求进行修改和完善。

前几天已经讲过了UDP协议下大文件传输的python实现代码，今天再实现TCP协议下大文件传输的python实现代码。
TCP和UDP的实现过程还是比较不一样的。

实现代码：

服务端：

import socket import time s = socket.socket(socket.AF_INET,socket.SOCK_STREAM) s.bind(('127.0.0.1',9999)) s.listen(5) print('Waiting for connection...') while True: sock,addr = s.accept() print('Accept new connection from %s:%s...' % addr) if count == 0: data1 = sock.recv(1024) print(str(data1)) file_total_size = int(data1.decode()) received_size = 0 sock.send('received'.encode()) data = sock.recv(1024) filepath = str(data.decode()) f = open(filepath, 'wb') while received_size < file_total_size: data = sock.recv(1024) f.write(data) received_size += len(data) print('已接收 ',received_size,' Byte') data = sock.recv(1024) if data == b'end': break f.close() s.close()

客户端：

import socket import os import time filename = input('please enter the filename you want to send:\n') filesize = str(os.path.getsize(filename)) fname1, fname2 = os.path.split(filename) client_addr = ('127.0.0.1',9999) f = open(filename,'rb') count = 0 flag = 1 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) #建立连接: s.connect(('127.0.0.1', 9999)) while True: if count == 0: s.send(filesize.encode()) start = time.time() s.recv(1024) s.send(fname2.encode()) for line in f: s.send(line) print('sending...') s.send(b'end') break s.close end = time.time() print('cost' + str(round(end - start, 2)) + 's')

运行截图：

服务器端：

客户端：

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