> Greentext

Simple and just works

    def fetch_html(self, url):
        domain = urllib.parse.urlparse(url).netloc
        if domain not in self.robot_parsers:
            rp = urllib.robotparser.RobotFileParser()
            rp.set_url(f'https://{domain}/robots.txt')
            rp.read()
            self.robot_parsers[domain] = rp

        rp = self.robot_parsers[domain]
        if not rp.can_fetch(self.user_agent, url):
            print(f"Fetching not allowed by robots.txt: {url}")
            return None

        if self.last_fetch_time:
            time_since_last_fetch = time.time() - self.last_fetch_time
            if time_since_last_fetch < self.delay:
                time.sleep(self.delay - time_since_last_fetch)

        headers = {'User-Agent': self.user_agent}
        response = requests.get(url, headers=headers)
        self.last_fetch_time = time.time()

        if response.status_code == 200:
            return response.text
        else:
            print(f"Failed to fetch {url}: {response.status_code}")
            return None

Randomly selected something from a project I'm working on that's simple and just works. Show me less than 300 lines of .NET to do the same, and I would be somewhat surprised.