python USES tcp to realize file transfer in LAN

This paper shares the specific code of python using tcp to realize file transfer in LAN for your reference. The specific content is as follows

Function:

You can use the TCP client created by python to download files from the TCP server we built ourselves.

Implementation requirements:

Install the socket module
Simple understanding of sokcet module usage

The server code is as follows:

import socket

def file_deal(file_name):
 #  Define functions to handle files that the user asks to download 
 try:
 # 2 Read in base mode 
 files = open(file_name, "rb")

 mes = files.read()

 except:


 print(" There is no such file ")

 else:

 files.close()

 return mes

def main():
 #  Create the socket 
 tcp_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 #  Fixed port number 
 tcp_socket.bind(("",8888))
 #  Convert active socket to passive socket 
 tcp_socket.listen(128)

 while True:
 #  using accept Gets the address of the socket and the client 
 client_socket,client_addr = tcp_socket.accept()
 #  Receive data from the client 
 file_name = client_socket.recv(4096)
 #  Call the function to process the file downloaded by the user 
 mes = file_deal(file_name)

 if mes:
  #  If the file is not sent empty 

  client_socket.send(mes)
 # Close the socket 

 client_socket.close()

if __name__ == "__main__":
 main()

import socket


def file_deal(file_name):
 #  Define functions to handle files that the user asks to download 
 try:
 # 2 Read in base mode 
 files = open(file_name, "rb")

 mes = files.read()

 except:


 print(" There is no such file ")

 else:

 files.close()

 return mes

def main():
 #  Create the socket 
 tcp_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 #  Fixed port number 
 tcp_socket.bind(("",8888))
 #  Convert active socket to passive socket 
 tcp_socket.listen(128)

 while True:
 #  using accept Gets the address of the socket and the client 
 client_socket,client_addr = tcp_socket.accept()
 #  Receive data from the client 
 file_name = client_socket.recv(4096)
 #  Call the function to process the file downloaded by the user 
 mes = file_deal(file_name)

 if mes:
  #  If the file is not sent empty 

  client_socket.send(mes)
 # Close the socket 

 client_socket.close()


if __name__ == "__main__":
 main()

Client code:

from socket import *
import os

def main():
 #  Set up the socket 
 tcp_socket = socket(AF_INET, SOCK_STREAM)
 #  Receive input from the server side ip And port 
 tcp_ip = input(" Please enter the ip:")

 tcp_port = int(input(" Please enter port :"))
 #  Connect to server 
 tcp_socket.connect((tcp_ip, tcp_port))
 #  Enter the file name to download 
 file_name = input(" Please enter the file name you want to download :")

 #  Send the file name to the server 
 tcp_socket.send(file_name.encode())
 #  create 1 An empty file 
 new_file = open(file_name, "wb")
 #  USES and calculates the number of bytes read 
 time = 0

 while True:
 #  Receive the content returned from the server side 
 mes = tcp_socket.recv(4096)
 #  If the content is not executed for empty 
 if mes:
  #  Decode and write to the file 
  new_file.write(mes.decode())

  #  Calculation of bytes 
  time += len(mes)

 else:
  #  If the number of bytes is empty, nothing is received 
  if time == 0:
  #  Close the file 
  new_file.close()
  #  Delete the file you just created 
  os.remove(file_name)
  print(" There are no files you want to download ")
  else:
  #  if time Have a value name File transfer completed 
  print(" File download successful ")

  break
 #  Close the socket 
 tcp_socket.close()


if __name__ == '__main__':
main()