[Whyp] Add extractor back-ported from yt-dlp

* from https://github.com/yt-dlp/yt-dlp/pull/6803, thanks CoryTibbettsDev

youtube_dl/extractor/extractors.py

@@ -1576,6 +1576,7 @@ from .weibo import (
     WeiboMobileIE
 )
 from .weiqitv import WeiqiTVIE
+from .whyp import WhypIE
 from .wistia import (
     WistiaIE,
     WistiaPlaylistIE,

youtube_dl/extractor/whyp.py

@@ -0,0 +1,78 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+from .common import InfoExtractor
+from ..utils import (
+    float_or_none,
+    merge_dicts,
+    str_or_none,
+    T,
+    traverse_obj,
+    url_or_none,
+)
+
+
+class WhypIE(InfoExtractor):
+    _VALID_URL = r'https?://(?:www\.)?whyp\.it/tracks/(?P<id>\d+)'
+    _TESTS = [{
+        'url': 'https://www.whyp.it/tracks/18337/home-page-example-track-b4kq7',
+        'md5': 'c1187b42ebf8605284e3dc92aeb33d16',
+        'info_dict': {
+            'url': 'https://cdn.whyp.it/50eb17cc-e9ff-4e18-b89b-dc9206a95cb1.mp3',
+            'id': '18337',
+            'title': 'Home Page Example Track',
+            'description': 'md5:bd758000fb93f3159339c852b5b9133c',
+            'ext': 'mp3',
+            'duration': 52.82,
+            'uploader': 'Brad',
+            'uploader_id': '1',
+            'thumbnail': 'https://cdn.whyp.it/a537bb36-3373-4c61-96c8-27fc1b2f427a.jpg',
+        },
+    }, {
+        'url': 'https://www.whyp.it/tracks/18337',
+        'only_matching': True,
+    }]
+
+    def _search_nuxt_data(self, webpage, video_id, context_name='__NUXT__', fatal=True, traverse=('data', 0)):
+        """Parses Nuxt.js metadata. This works as long as the function __NUXT__ invokes is a pure function"""
+
+        import functools
+        import json
+        import re
+        from ..utils import (js_to_json, NO_DEFAULT)
+
+        re_ctx = re.escape(context_name)
+        FUNCTION_RE = r'\(function\((?P<arg_keys>.*?)\){return\s+(?P<js>{.*?})\s*;?\s*}\((?P<arg_vals>.*?)\)'
+        js, arg_keys, arg_vals = self._search_regex(
+            (p.format(re_ctx, FUNCTION_RE) for p in (r'<script>\s*window\.{0}={1}\s*\)\s*;?\s*</script>', r'{0}\(.*?{1}')),
+            webpage, context_name, group=('js', 'arg_keys', 'arg_vals'),
+            default=NO_DEFAULT if fatal else (None, None, None))
+        if js is None:
+            return {}
+
+        args = dict(zip(arg_keys.split(','), map(json.dumps, self._parse_json(
+            '[{0}]'.format(arg_vals), video_id, transform_source=js_to_json, fatal=fatal) or ())))
+
+        ret = self._parse_json(js, video_id, transform_source=functools.partial(js_to_json, vars=args), fatal=fatal)
+        return traverse_obj(ret, traverse) or {}
+
+    def _real_extract(self, url):
+        unique_id = self._match_id(url)
+        webpage = self._download_webpage(url, unique_id)
+        data = self._search_nuxt_data(webpage, unique_id)['rawTrack']
+
+        return merge_dicts({
+            'url': data['audio_url'],
+            'id': unique_id,
+        }, traverse_obj(data, {
+            'title': 'title',
+            'description': 'description',
+            'duration': ('duration', T(float_or_none)),
+            'uploader': ('user', 'username'),
+            'uploader_id': ('user', 'id', T(str_or_none)),
+            'thumbnail': ('artwork_url', T(url_or_none)),
+        }), {
+            'ext': 'mp3',
+            'vcodec': 'none',
+            'http_headers': {'Referer': 'https://whyp.it/'},
+        }, rev=True)