The use of socket making a simple download model (TCP)

Download fact, need two models, one is the server side, as a response and send data, the other model is the client side, initiate a download request and download data sent by the server, with this concept you can basically write.

 

1, the client-side code is

Import socket 

DEF main ():
     # create socket 
    TCP_SOCKET = socket.socket (socket.AF_INET, socket.SOCK_STREAM) # socket creates a socket, DGRAM as UDP, STREAM to TCP 

    # input you want to bind the server information 
    dest_ip = the iNPUT ( " Please enter the server ip: " ) 

    dest_port = int (the iNPUT ( " Please enter the server Porti: " )) 

    # bind server 
    tcp_socket.connect ((dest_ip, dest_port)) # TCP server IP port need to bind this point need to distinguish between UDP and 

    # need to download the input file name 
    file_name = the iNPUT ( " Please enter the name of the file you want to download: " ) 
    tcp_socket.send (file_name.encode ( ' UTF-8 '))
     # Receive and download information 
    Data tcp_socket.recv = (1024 * 1024 ) 
    with Open ( ' new ' + file_name, ' WB ' ) AS F: 
        f.write (Data) 

    # close the socket 
    tcp_socket.close () 


IF  the __name__ == ' __main__ ' : 
    main ()

2, server code

Import socket 

DEF main ():
     # create socket 
    TCP_SOCKET = socket.socket (socket.AF_INET, socket.SOCK_STREAM)
     # bind the local information 
    LOCAL_ADDR = ( '' , 8080 ) 
    tcp_socket.bind (LOCAL_ADDR) 


    # monitor 
    tcp_socket.listen (128 ) the TCP server has a listening #, wait for a connection link 
    
    # download service 
    new_client, client_addr = tcp_socket.accept () # wait connecting links, if the client connect a return tuples, tuples [0] is the next send and receive information the new socket is used, the ancestral [1] is connected to a client address 
    file_name = new_client.recv (1024) .decode ( ' UTF-. 8 ' )
     Print ( ' successful link from% s' %(str(client_addr)))
    try:
        f = open(file_name,'rb')
        data = f.read()
    except Exception as t:
        print("文件名错误%s" %(t))
    new_client.send(data)
    new_client.close()
    tcp_socket.close()


if __name__ == "__main__":
    main()

The above code, running directly on the two terminals can be linux