portquiz.net quick tester

portquiz.py

# directly from
# https://docs.python.org/3/library/concurrent.futures.html#threadpoolexecutor-example

import concurrent.futures
import urllib.request

def check_port(port):
    print('testing %d   \r' % port, end='')
    # smaller response text!
    r = urllib.request.Request('http://portquiz.net:%d' % port, headers={'User-Agent': 'curl'})
    with urllib.request.urlopen(r, timeout=5) as conn:
        return conn.read()

with concurrent.futures.ThreadPoolExecutor(max_workers=5) as executor:
    future_to_port = {
      executor.submit(check_port, port): port for port in range(1, 10000)
    }
    for future in concurrent.futures.as_completed(future_to_port):
        port = future_to_port[future]
        try:
            data = future.result()
        except Exception as exc:
            print('%d generated an exception: %s' % (port, exc))
        else:
            if b'Port %d test successful!' % port not in data:
                print('%r returned invalid response' % port)