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from codecs import open as codecs_open
from urllib.request import urlopen
from typing import Optional
from .exceptions import (
TldIOError,
TldImproperlyConfigured,
)
from .helpers import project_dir
from .registry import Registry
__author__ = 'Artur Barseghyan'
__copyright__ = '2013-2020 Artur Barseghyan'
__license__ = 'MPL-1.1 OR GPL-2.0-only OR LGPL-2.1-or-later'
__all__ = ('BaseTLDSourceParser',)
class BaseTLDSourceParser(metaclass=Registry):
"""Base TLD source parser."""
uid: Optional[str] = None
source_url: str
local_path: str
@classmethod
def validate(cls):
"""Constructor."""
if not cls.uid:
raise TldImproperlyConfigured(
"The `uid` property of the TLD source parser shall be defined."
)
@classmethod
def get_tld_names(cls, fail_silently: bool = False, retry_count: int = 0):
"""Get tld names.
:param fail_silently:
:param retry_count:
:return:
"""
cls.validate()
raise NotImplementedError(
"Your TLD source parser shall implement `get_tld_names` method."
)
@classmethod
def update_tld_names(cls, fail_silently: bool = False) -> bool:
"""Update the local copy of the TLD file.
:param fail_silently:
:return:
"""
try:
remote_file = urlopen(cls.source_url)
local_file = codecs_open(
project_dir(cls.local_path),
'wb',
encoding='utf8'
)
local_file.write(remote_file.read().decode('utf8'))
local_file.close()
remote_file.close()
except Exception as err:
if fail_silently:
return False
raise TldIOError(err)
return True
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