Deal with HTML documents properly

redditbot.py

@@ -37,6 +37,7 @@ cron_duration = config_data['config']['cron_duration']
 
 logging.basicConfig(level=logging.INFO)
 async def main():
+    zws = '\u200b'
     client = await TelegramClient('redditbot', tg_api_id, tg_api_hash).start(bot_token=bot_token)
     client.parse_mode = 'html'
     session = aiohttp.ClientSession()
@@ -228,6 +229,10 @@ async def main():
                         url = preview['images'][0]['source']['url']
                 if url:
                     await _download_file(filename, url)
+                    ext = await _get_file_ext(filename)
+                    if ext.startswith('.htm'):
+                        files = []
+                        captions = [f'<a href="{url}">{zws}</a>{text}\n\nURL: {url}']
                 for a, i in enumerate(files):
                     ext = await _get_file_ext(i)
                     os.rename(i, i + ext)