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#!/usr/bin/env python3
"""
Remote python server.
Execute Python commands remotely and send output back.
WARNING: This version has a gaping security hole -- it accepts requests
from any host on the Internet!
"""
import sys
from socket import socket, AF_INET, SOCK_STREAM
import io
import traceback
PORT = 4127
BUFSIZE = 1024
def main():
if len(sys.argv) > 1:
port = int(sys.argv[1])
else:
port = PORT
s = socket(AF_INET, SOCK_STREAM)
s.bind(('', port))
s.listen(1)
while True:
conn, (remotehost, remoteport) = s.accept()
with conn:
print('connection from', remotehost, remoteport)
request = b''
while True:
data = conn.recv(BUFSIZE)
if not data:
break
request += data
reply = execute(request.decode())
conn.send(reply.encode())
def execute(request):
stdout = sys.stdout
stderr = sys.stderr
sys.stdout = sys.stderr = fakefile = io.StringIO()
try:
try:
exec(request, {}, {})
except:
print()
traceback.print_exc(100)
finally:
sys.stderr = stderr
sys.stdout = stdout
return fakefile.getvalue()
try:
main()
except KeyboardInterrupt:
pass
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