linkcheck.py

import requests
import argparse

NOSITE_CODE = ''

def check_url(url):
    try:
        response = requests.get(url)
        return response.status_code
    except requests.RequestException:
        print(requests.RequestException)

def check_urls_from_file(input_filename, output_filename):
    with open(input_filename, 'r') as input_file, open(output_filename, 'w') as output_file:
        output_file.write(f"Tested Link, HTTP Status, Found\n")
        for line in input_file:
            input_url = line.strip()  # Remove newline characters and leading/trailing whitespaces
            print(input_url)
            if input_url == '':
                output_file.write(f"{NOSITE_CODE},{NOSITE_CODE},N/A\n")
            else:
                if input_url[:4] != 'http':
                    test_url = 'https://' + input_url
                else:
                    test_url = input_url
                status_code = check_url(test_url)
                if   status_code == 200: found =  'Y'
                elif status_code == 404: found =  'N'
                elif status_code is None: found = '?'
                elif status_code >= 500: found =  'N'
                else: found = '?' 
                output_file.write(f"{test_url},{status_code},{found}\n")


if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="Check the validity of URLs from a file.")
    parser.add_argument("input_file", help="The name of the input file containing URLs, one per line.")
    parser.add_argument("output_file", help="The name of the output file to store the results.")
    args = parser.parse_args()

    check_urls_from_file(args.input_file, args.output_file)