1 #!/usr/bin/env python3 2 3 """ 4 Remote python server. 5 Execute Python commands remotely and send output back. 6 7 WARNING: This version has a gaping security hole -- it accepts requests 8 from any host on the Internet! 9 """ 10 11 import sys 12 from socket import socket, AF_INET, SOCK_STREAM 13 import io 14 import traceback 15 16 PORT = 4127 17 BUFSIZE = 1024 18 19 def main(): 20 if len(sys.argv) > 1: 21 port = int(sys.argv[1]) 22 else: 23 port = PORT 24 s = socket(AF_INET, SOCK_STREAM) 25 s.bind(('', port)) 26 s.listen(1) 27 while True: 28 conn, (remotehost, remoteport) = s.accept() 29 print('connection from', remotehost, remoteport) 30 request = b'' 31 while 1: 32 data = conn.recv(BUFSIZE) 33 if not data: 34 break 35 request += data 36 reply = execute(request.decode()) 37 conn.send(reply.encode()) 38 conn.close() 39 40 def execute(request): 41 stdout = sys.stdout 42 stderr = sys.stderr 43 sys.stdout = sys.stderr = fakefile = io.StringIO() 44 try: 45 try: 46 exec(request, {}, {}) 47 except: 48 print() 49 traceback.print_exc(100) 50 finally: 51 sys.stderr = stderr 52 sys.stdout = stdout 53 return fakefile.getvalue() 54 55 try: 56 main() 57 except KeyboardInterrupt: 58 pass 59
