Python script that does checks on apex domains from a text file. Checks status for bare apex / "www." subdomains and ssl / non-ssl. (4 checks on each domain). Outputs in CSV format.

site_up_down.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

##  Brady Shea - 04AUG2021 - (Python 3 script)
##  This will read in a file list of plain APEX domains like:
##   "example.com"
##  If you want it in a file just pipe the script to a file.
##    python3 -u ./sites-up-down.py | tee ./domain-check.csv

import requests
import ssl
import socket
from requests.packages.urllib3.exceptions import InsecureRequestWarning

requests.packages.urllib3.disable_warnings(InsecureRequestWarning)

## can change these
sitelist = "sitelist-test.txt"
time_out = 2
##

def filelist_lookup():
    uri_type = ""
    counter = 0
    file_contents = open(sitelist, 'r')
    Lines = file_contents.readlines()

    print("Group,Domain,URI_type,Response_Code,Link Up/Down,Errors,Link,Redirect")

    for line in Lines:
        counter += 1
        nosubdomain    = line.strip()
        wwwsubdomain   = "www." + line.strip()
        dorequests("http://",  nosubdomain, counter)
        dorequests("http://",  wwwsubdomain, counter)
        dorequests("https://", nosubdomain, counter)
        dorequests("https://", wwwsubdomain, counter)

def dorequests(uri_type, domain, count):
        up_down = "link down"
        full_link = uri_type + domain

        try:
             with requests.Session() as req:
                  response = req.get(full_link, verify=False, allow_redirects=False, timeout=time_out)
        except requests.exceptions.Timeout as e:
             print_line(count, domain, uri_type[:-3], "000", up_down, "ERROR = TIMEOUT", full_link, "n/a")
        except requests.exceptions.ReadTimeout as e:
             print_line(count, domain, uri_type[:-3], "000", up_down, "ERROR = READ TIMEOUT", full_link, "n/a")
        except requests.ConnectionError as e:
             print_line(count, domain, uri_type[:-3], "000", up_down, "ERROR = CONNECTION/SSL/TLS", full_link, "n/a")
        except requests.exceptions.TooManyRedirects as e:
             print_line(count, domain, uri_type[:-3], "000", up_down, "ERROR = TOO MANY REDIRECTS", full_link, "n/a")
        except KeyboardInterrupt:
             print("Keyboard exception caught. Exiting.")
             raise SystemExit()
        except requests.exceptions.RequestException as e:
             raise SystemExit(e)
        else:  # Got a reply..
             if response.ok:
               up_down = "link up"
             if response.status_code == 301 or response.status_code == 302: # Check if redirect and show link
               print_line(count, domain, uri_type[:-3], response.status_code, up_down, "n/a", full_link, response.headers['Location'])
             else:
               print_line(count, domain, uri_type[:-3], response.status_code, up_down, "n/a", full_link, "n/a")

def print_line(ct, dom, uri, rscode, updown, errors, fullurl, redirect):
        print("Site {0},{1},{2},{3},{4},{5},{6},{7}".format(ct, dom, uri, rscode, updown, errors, fullurl, redirect))

filelist_lookup()

sitelist-test.txt

example.com
example.net
example.org
example.edu
example.us
example.me

Have tested with a site list of +350 domains and works. Had some read timeout issues at first. Please report if you find errors.

Example output (Four checks per site / .csv format):