033 remote execution command

Keywords: Python socket shell Linux encoding

Execute command on server
It seems that there is no module to execute the command before. Now it is added

import  subprocess
obj = subprocess.Popen('dir',shell=True,stdout=subprocess.PIPE)
#Get an object. The command is in front, shell The script can be executed, stdout Set a process pipeline. There are actually two processes, one is the main process and the other is shell process
x = obj.stdout.read()    # Here is the execution information
print(str(x,'gbk'))  #  str(x,'utf8')Forget that the system is gbk Encoding

###Example of remote command execution:

#If the execution result of the instruction is short, there will be no problem

 1 import socket
 2 import subprocess
 3 def get_server_socket():
 4     sk = socket.socket()
 5     server_address = ('127.0.0.1',8888)
 6     sk.bind(server_address)
 7     sk.listen(5)
 8     return sk
 9 
10 def get_conn(sk):
11     print('waitconnect...')
12     conn,addr = sk.accept()
13     return conn
14 
15 if __name__ == '__main__':
16     sk = get_server_socket()
17     conn = get_conn(sk)
18     while True:
19         try:
20             data = conn.recv(1024)##Linux will not report an error here. If conn is closed forcibly, data will become empty, that is to say, Linux will not try directly.
21         except Exception as e:
22             conn = get_conn(sk)
23         print(str(data,'utf8'))
24         if not data:
25             conn = get_conn(sk)
26             continue
27         sp = subprocess.Popen(str(data,'utf8'),shell=True,stdout=subprocess.PIPE)#Note if the command is of string type
28         result = sp.stdout.read()#str(sp.stdout.read(),'gbk')
29         conn.send(result)
30         print(str(result,'gbk'))
31         print('waiting...')
32     conn.close()

cmd_server.py

 1 import socket
 2 
 3 def connect_server():
 4     sk = socket.socket()
 5     server_address = ('127.0.0.1',8888)
 6     sk.connect(server_address)
 7     return sk
 8 
 9 if __name__ == '__main__':
10     sk = connect_server()
11     while True:
12         inp = input('>>>')
13         if inp == 'exit':
14             break
15         sk.send(bytes(inp,'utf8'))
16         print('waiting...')
17         data = sk.recv(1024)
18         print(str(data,'gbk'))
19     sk.close()

cmd_client.py

#The instruction execution result is too long to be delivered at one time. The idea of transferring documents.

1 import socket 2 import subprocess 3 def get_server_socket(): 4 sk = socket.socket() 5 server_address = ('127.0.0.1',8888) 6 sk.bind(server_address) 7 sk.listen(5) 8 return sk 9 def get_conn(sk): 10 print('waitconnect...') 11 conn, addr = sk.accept() 12 return conn 13 14 if __name__ == '__main__': 15 sk = get_server_socket() 16 conn = get_conn(sk) 17 while True: 18 try: 19 data = conn.recv(1024)##Linux will not report an error here. If conn is closed forcibly, data will become empty, that is to say, Linux will not try directly. 20 except Exception as e: 21 conn = get_conn(sk) 22 print(str(data,'utf8')) 23 if not data: 24 conn = get_conn(sk) 25 continue 26 sp = subprocess.Popen(str(data,'utf8'),shell=True,stdout=subprocess.PIPE)#Note if the command is of string type 27 result = sp.stdout.read()#Read content 28 conn.sendall(bytes(str(len(result)),'utf8'))#Sending length 29 conn.sendall(result)#send content 30 print(str(result,'gbk')) 31 print('waiting...') 32 conn.close()

1 import socket 2 def connect_server(): 3 sk = socket.socket() 4 server_address = ('127.0.0.1',8888) 5 sk.connect(server_address) 6 return sk 7 8 if __name__ == '__main__': 9 sk = connect_server() 10 while True: 11 inp = input('>>>') 12 if inp == '__exit': 13 break 14 sk.send(bytes(inp,'utf8')) 15 print('waiting...') 16 17 result_length = int(str(sk.recv(1024),'utf8'))#Record the length, and then stop receiving the corresponding length 18 data = bytes() 19 while len(data) != result_length: 20 r = sk.recv(1024) 21 data += r 22 print(str(data,'gbk')) 23 sk.close()

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033 remote execution command

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