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[extractor/redgifs] Fix extractor (#4892)

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Closes #4805
Authored by: jhwgh1968
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jhwgh1968 2022-10-04 03:16:01 +00:00 committed by GitHub
parent c7f540ea1e
commit c53e5cf59f
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1 changed files with 31 additions and 3 deletions
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34
yt_dlp/extractor/redgifs.py
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@ -18,6 +18,12 @@ class RedGifsBaseInfoExtractor(InfoExtractor):
'hd': None,
}
_API_HEADERS = {
'referer': 'https://www.redgifs.com/',
'origin': 'https://www.redgifs.com',
'content-type': 'application/json',
}
def _parse_gif_data(self, gif_data):
video_id = gif_data.get('id')
quality = qualities(tuple(self._FORMATS.keys()))
@ -43,7 +49,7 @@ def _parse_gif_data(self, gif_data):
return {
'id': video_id,
'webpage_url': f'https://redgifs.com/watch/{video_id}',
'ie_key': RedGifsIE.ie_key(),
'extractor_key': RedGifsIE.ie_key(),
'extractor': 'RedGifs',
'title': ' '.join(gif_data.get('tags') or []) or 'RedGifs',
'timestamp': int_or_none(gif_data.get('createDate')),
@ -57,9 +63,29 @@ def _parse_gif_data(self, gif_data):
'formats': formats,
}
def _fetch_oauth_token(self, video_id):
# These pages contain the OAuth token that is necessary to make API calls.
index_page = self._download_webpage(f'https://www.redgifs.com/watch/{video_id}', video_id)
index_js_uri = self._html_search_regex(
r'href="?(/assets/js/index[.a-z0-9]*.js)"?\W', index_page, 'index_js_uri')
index_js = self._download_webpage(f'https://www.redgifs.com/{index_js_uri}', video_id)
# It turns out that a { followed by any valid JSON punctuation will always result in the
# first two characters of the base64 encoding being "ey".
# Use this fact to find any such string constant of a reasonable length with the correct
# punctuation for an oauth token
oauth_token = self._html_search_regex(
r'\w+\s*[=:]\s*"(ey[^"]+\.[^"]*\.[^"]{43,45})"', index_js, 'oauth token')
self._API_HEADERS['authorization'] = f'Bearer {oauth_token}'
def _call_api(self, ep, video_id, *args, **kwargs):
if 'authorization' not in self._API_HEADERS:
self._fetch_oauth_token(video_id)
assert 'authorization' in self._API_HEADERS
headers = dict(self._API_HEADERS)
headers['x-customheader'] = f'https://www.redgifs.com/watch/{video_id}'
data = self._download_json(
f'https://api.redgifs.com/v2/{ep}', video_id, *args, **kwargs)
f'https://api.redgifs.com/v2/{ep}', video_id, headers=headers, *args, **kwargs)
if 'error' in data:
raise ExtractorError(f'RedGifs said: {data["error"]}', expected=True, video_id=video_id)
return data
@ -102,6 +128,7 @@ class RedGifsIE(RedGifsBaseInfoExtractor):
'like_count': int,
'categories': list,
'age_limit': 18,
'tags': list,
}
}, {
'url': 'https://thumbs2.redgifs.com/SqueakyHelplessWisent-mobile.mp4#t=0',
@ -117,13 +144,14 @@ class RedGifsIE(RedGifsBaseInfoExtractor):
'like_count': int,
'categories': list,
'age_limit': 18,
'tags': list,
}
}]
def _real_extract(self, url):
video_id = self._match_id(url).lower()
video_info = self._call_api(
f'gifs/{video_id}', video_id, note='Downloading video info')
f'gifs/{video_id}?views=yes', video_id, note='Downloading video info')
return self._parse_gif_data(video_info['gif'])