Employment DAY2_ network programming _ file download client and server

Import socket DEF main ():
     # create socket 
    TCP_SOCKET = socket.socket (socket.AF_INET, socket.SOCK_STREAM) 

    # get server Port ip 
    dest_addr the INPUT = ( " Please enter the server's ip: " ) 
    dest_port = int (the INPUT ( " Please enter the server's Port: " )) 

    # linked server 
    tcp_socket.connect ((dest_addr, dest_port)) 

    # get the download file name 
    file = the iNPUT ( " Please enter the name of the file to be downloaded: " ) 

    # the file name of the sender to the server 
    tcp_socket.send (file.encode ( " GBK " )) 

    #Receiving file data 
    recv_data = tcp_socket.recv (1024 ) 

    # save the received data to a file 
    IF recv_data: 
        with Open ( " copy " + File, " WB " ) AS F: 
            f.write (recv_data) 
    # Close sockets 
    tcp_socket.close () 


IF  __name__ == " __main__ " : 
    main ()

Import Socket 

DEF send_file_2_client (client_socket, client_addr):
     # . 1 receiving the downloaded file name 
    # reception request transmitted to the client, the receiving client sent, the file name 
    file_name = client_socket.recv (1024 )
     Print ( " client% s sent, file name: S% " % (STR (client_addr), file_name.decode ( " GBK " ))) 

    FILE_CONTENT = None
     # 2 to open the file, read data 
    the try : 
        F = open (file_name.decode ( " GBK " ), " rb " ) 
        FILE_CONTENT =f.read () 
        f.close () 
    the except Exception AS RET:
         Print ( " do not want to download the file S% " % RET) 

    # Data 3 to send the file to the client 
    IF   FILE_CONTENT:
     # echo part of the data to the client 
        client_socket. the send (FILE_CONTENT) 


DEF main ():
     # buy a cell phone - create tcp socket 
    TCP_SOCKET = socket.socket (socket.AF_INET, socket.SOCK_STREAM) 

    # into the phone card - binding 
    tcp_socket.bind (( "" , 7890 ) ) 

    # set the phone to ring the normal mode (the default socket so that by the active becomes passive and the listen) 
    tcp_socket.listen (128 ) 

    the whileTrue:
         # wait for the arrival of someone else's phone (waiting for a client link the Accept) 
        client_socket, client_addr = tcp_socket.accept () 

        # Print (client_socket) 
        Print (client_addr) 

        send_file_2_client (client_socket, client_addr) 

        # close the socket 

        client_socket.close () 
    TCP_SOCKET .close () 

IF  __name__ == " __main__ " : 
    main ()