python-- simple interactive cmd code

cmd_server

Import Socket
 Import   The subprocess # execute shell commands 
SK = socket.socket () 
address = ( ' 127.0.0.1 ' , 8000 ) 
sk.bind (address) 
sk.listen ( . 3 )
 Print ( ' Waiting ... ' ) 

the while . 1 : 
    Conn, addr = sk.accept ()
     the while . 1 :
         the try : 
            data = conn.recv (1024) # of data received incomplete too cause 
        the except Exception AS E:
             Print (' The customer has left ' )
             BREAK 
        IF  Not Data: BREAK 
        Print (STR (Data, " UTF-. 8 ' )) 

        obj = subprocess.Popen (STR (Data, " UTF-. 8 ' ), the shell = True, stdout = The subprocess. pIPE)
         # stdout standard output pIPE is the process transfer conduit act as the main process (the package) 
        # if it can not be added to get a final assignment to the variable 
        cmd_result = obj.stdout.read () 
        result_len = bytes ( str (len (cmd_result)), ' UTF-. 8 ' )
         # int type can not be directly converted to bytes required by an intermediate transition str
        conn.sendall (result_len) 
        conn.recv ( 1024) # isolates the 
        conn.sendall (cmd_result) 
sk.close () 

"" " " " 
Client then sends a command to the server side to return results 

  to solve the problem: if a transmission of command result is too large to be received a plurality of times, the next command can not be executed resulting in 
  solution: the results using the len function determines the length of the transmission, after transmission to the client terminal 
then the while loop is determined by the client 
  Note: only 1 transmission will pass bytes class, while int can not be converted directly bytes so the need for excessive use str 
  2. send two together is likely to stick package, you need to be a cut off if a sleep time module time.sleep (), then the process will delay 
  Therefore plus any 'closed aND dEVELOPMENT' like 
'' '

 

 

cmd_clinet:

import socket

address=('127.0.0.1',8000)

sk=socket.socket()

sk.connect(address)

while True:
    a=input(">>>")
    if a=='exit':
        break
    sk.send(bytes(a,'utf-8'))
    recv_len=int(str(sk.recv(1024),'utf-8'))
    sk.send('ok')#用于隔断
    print(recv_len)
    data=bytes()
    while len(data)!=recv_len:
        recv=sk.recv(1024)
        data+=recv
    print(str(data,'gbk'))
sk.close()
"""""

"""