apply filter letter_digit_hyphen to ads

more info: https://github.com/bootmortis/iran-hosted-domains/issues/6\#issuecomment-1427918979

Author: bootmortis

src/get_domians.py

@@ -32,6 +32,7 @@ def ads() -> Iterable[str]:
     ads = (ad.strip() for ad in ads if ad.strip() != '')
     ads = filter(utils.is_not_ip, ads)
     ads = filter(utils.is_url, ads)
+    ads = filter(utils.letter_digit_hyphen, ads)
     return sorted(ads)
 
 def v2fly(filename = "category-ir") -> Iterable[str]:

src/utils.py

@@ -99,7 +99,7 @@ def letter_digit_hyphen(text: str) -> bool:
     # https://github.com/v2fly/v2ray-core/discussions/1275
     # https://www.rfc-editor.org/rfc/rfc952
 
-    return not bool(re.match(r"[^a-zA-Z0-9-.]", text))
+    return bool(re.search(r"^[a-zA-Z0-9-\.]+$", text))
 
 
 def download(url: str, path: str, method: str = 'GET', headers: dict = None, payload: str = None):