Repository: yt-dlp/yt-dlp
File: yt_dlp/extractor/damtomo.py (Python)

Code before:
# coding: utf-8
from __future__ import unicode_literals

import re

from .common import InfoExtractor
from ..utils import ExtractorError, clean_html, int_or_none, try_get
from ..compat import compat_str


class DamtomoBaseIE(InfoExtractor):
    def _real_extract(self, url):
        video_id = self._match_id(url)
        webpage, handle = self._download_webpage_handle(self._WEBPAGE_URL_TMPL % video_id, video_id, encoding='sjis')

        if handle.url == 'https://www.clubdam.com/sorry/':
            raise ExtractorError('You are rate-limited. Try again later.', expected=True)
        if '<h2>予期せぬエラーが発生しました。</h2>' in webpage:
            raise ExtractorError('There is an error on server-side. Try again later.', expected=True)

        # NOTE: there are excessive amount of spaces and line breaks, so ignore spaces around these part
        description = self._search_regex(r'(?m)<div id="public_comment">\s*<p>\s*([^<]*?)\s*</p>', webpage, 'description', default=None)
        uploader_id = self._search_regex(r'<a href="https://www\.clubdam\.com/app/damtomo/member/info/Profile\.do\?damtomoId=([^"]+)"', webpage, 'uploader_id', default=None)

        # cleaner way to extract information in HTML
        # example content: https://gist.github.com/nao20010128nao/1d419cc9ca3177be134094addf28ab51
        data_dict = {g.group(2): clean_html(g.group(3)) for g in re.finditer(r'(?s)<(p|div)\s+class="([^" ]+?)">(.+?)</\1>', webpage)}
        data_dict = {k: re.sub(r'\s+', ' ', v) for k, v in data_dict.items() if v}

        # since videos do not have title, give the name of song instead
        data_dict['user_name'] = re.sub(r'\s*さん\s*$', '', data_dict['user_name'])
        title = data_dict['song_title']

        stream_tree = self._download_xml(
            self._DKML_XML_URL % video_id, video_id, note='Requesting stream information', encoding='sjis',
            # doing this has no problem since there is no character outside ASCII,
            # and never likely to happen in the future
            transform_source=lambda x: re.sub(r'\s*encoding="[^"]+?"', '', x))
        m3u8_url = try_get(stream_tree, lambda x: x.find(
            './/d:streamingUrl', {'d': self._DKML_XML_NS}).text.strip(), compat_str)
        if not m3u8_url:
            raise ExtractorError('Failed to obtain m3u8 URL')

        return {
            'id': video_id,
            'title': title,

Review comment (suggestion):
```suggestion
```
using /s* everywhere is already recommended practice

Code after:
# coding: utf-8
from __future__ import unicode_literals

import re

from .common import InfoExtractor
from ..utils import ExtractorError, clean_html, int_or_none, try_get, unified_strdate
from ..compat import compat_str


class DamtomoBaseIE(InfoExtractor):
    def _real_extract(self, url):
        video_id = self._match_id(url)
        webpage, handle = self._download_webpage_handle(self._WEBPAGE_URL_TMPL % video_id, video_id, encoding='sjis')

        if handle.url == 'https://www.clubdam.com/sorry/':
            raise ExtractorError('You are rate-limited. Try again later.', expected=True)
        if '<h2>予期せぬエラーが発生しました。</h2>' in webpage:
            raise ExtractorError('There is an error on server-side. Try again later.', expected=True)

        description = self._search_regex(r'(?m)<div id="public_comment">\s*<p>\s*([^<]*?)\s*</p>', webpage, 'description', default=None)
        uploader_id = self._search_regex(r'<a href="https://www\.clubdam\.com/app/damtomo/member/info/Profile\.do\?damtomoId=([^"]+)"', webpage, 'uploader_id', default=None)

        data_dict = {
            mobj.group('class'): re.sub(r'\s+', ' ', clean_html(mobj.group('value')))
            for mobj in re.finditer(r'(?s)<(p|div)\s+class="(?P<class>[^" ]+?)">(?P<value>.+?)</\1>', webpage)}

        # since videos do not have title, give the name of song instead
        data_dict['user_name'] = re.sub(r'\s*さん\s*$', '', data_dict['user_name'])
        title = data_dict.get('song_title')

        stream_tree = self._download_xml(
            self._DKML_XML_URL % video_id, video_id, note='Requesting stream information', encoding='sjis',
            # doing this has no problem since there is no character outside ASCII,
            # and never likely to happen in the future
            transform_source=lambda x: re.sub(r'\s*encoding="[^"]+?"', '', x))
        m3u8_url = try_get(stream_tree, lambda x: x.find(
            './/d:streamingUrl', {'d': self._DKML_XML_NS}).text.strip(), compat_str)
        if not m3u8_url:
            raise ExtractorError('Failed to obtain m3u8 URL')
        formats = self._extract_m3u8_formats(m3u8_url, video_id, ext='mp4')
        self._sort_formats(formats)

        return {
            'id': video_id,
            'title': title,