restart.py

import requests
from bs4 import BeautifulSoup
import itertools
import netifaces
import time
from datetime import datetime

def connection_up():
    r = requests.get('google.com')

    return int(r.status_code) == 200

def get_page(tab):
    r = requests.get('http://192.168.100.1/' + tab)

    return r.text

def build_dictionary(html):
    soup = BeautifulSoup(html)
    table = soup.find_all(['td'])

    information = [str(item)[4:-5] for item in table]

    return dict(itertools.izip_longest(*[iter(information)] * 2, fillvalue=''))

def reset_modem():
    r = requests.get('http://192.168.1.100/reset.htm')

def get_filename():
    return 'incident-{}.html'.format(datetime.now().strftime("%Y%m%d-%H%M%S"))

while True:
    time.sleep(60)

    for _ in range(3):
        if connection_up:
            break

        time.sleep(10)

    else:
        # Get diagnostic information about local host and from Modem
        nic = netifaces.ifaddresses('eth0')
        nic[netifaces.AF_INET]

        try:
           status_html = get_page('indexData.htm')
           status = build_dictionary(status_html)

           address_html = get_page('cmAddressData.htm')
           address = build_dictionary(address_html)

           signal_html = get_page('cmSignalData.htm')
           logs_html = get_page('cmLogsData.htm')

        except:
           # Modem power off or unreachable
           break

        # Decide whether or not to restart the Modem
        if status['Cable Modem Status'] == 'Operational':
            reset_modem()

            with open(get_filename(), 'a') as f:
                f.write(status_html)
                f.write(address_html)
                f.write(signal_html)
                f.write(logs_html)

                time.sleep(120)

                if connection_up():
                    f.write('Connection restored after restart')
                else:
                    f.write('Connection still down after retart')

            time.sleep(1800)