[ie/XiaoHongShu] Add extractor (#9646)

Closes #9529
Authored by: HobbyistDev

yt_dlp/extractor/_extractors.py

@@ -2386,6 +2386,7 @@
     XHamsterEmbedIE,
     XHamsterUserIE,
 )
+from .xiaohongshu import XiaoHongShuIE
 from .ximalaya import (
     XimalayaIE,
     XimalayaAlbumIE

yt_dlp/extractor/xiaohongshu.py

@@ -0,0 +1,83 @@
+import functools
+
+from .common import InfoExtractor
+from ..utils import (
+    float_or_none,
+    int_or_none,
+    js_to_json,
+    url_or_none,
+)
+from ..utils.traversal import traverse_obj
+
+
+class XiaoHongShuIE(InfoExtractor):
+    _VALID_URL = r'https?://www\.xiaohongshu\.com/explore/(?P<id>[\da-f]+)'
+    IE_DESC = '小红书'
+    _TESTS = [{
+        'url': 'https://www.xiaohongshu.com/explore/6411cf99000000001300b6d9',
+        'md5': '2a87a77ddbedcaeeda8d7eae61b61228',
+        'info_dict': {
+            'id': '6411cf99000000001300b6d9',
+            'ext': 'mp4',
+            'uploader_id': '5c31698d0000000007018a31',
+            'description': '#今日快乐今日发[话题]# #吃货薯看这里[话题]# #香妃蛋糕[话题]# #小五卷蛋糕[话题]# #新手蛋糕卷[话题]#',
+            'title': '香妃蛋糕也太香了吧🔥不需要卷❗️绝对的友好',
+            'tags': ['今日快乐今日发', '吃货薯看这里', '香妃蛋糕', '小五卷蛋糕', '新手蛋糕卷'],
+            'duration': 101.726,
+            'thumbnail': r're:https?://sns-webpic-qc\.xhscdn\.com/\d+/[a-z0-9]+/[\w]+',
+        }
+    }]
+
+    def _real_extract(self, url):
+        display_id = self._match_id(url)
+        webpage = self._download_webpage(url, display_id)
+        initial_state = self._search_json(
+            r'window\.__INITIAL_STATE__\s*=', webpage, 'initial state', display_id, transform_source=js_to_json)
+
+        note_info = traverse_obj(initial_state, ('note', 'noteDetailMap', display_id, 'note'))
+        video_info = traverse_obj(note_info, ('video', 'media', 'stream', ('h264', 'av1', 'h265'), ...))
+
+        formats = []
+        for info in video_info:
+            format_info = traverse_obj(info, {
+                'fps': ('fps', {int_or_none}),
+                'width': ('width', {int_or_none}),
+                'height': ('height', {int_or_none}),
+                'vcodec': ('videoCodec', {str}),
+                'acodec': ('audioCodec', {str}),
+                'abr': ('audioBitrate', {int_or_none}),
+                'vbr': ('videoBitrate', {int_or_none}),
+                'audio_channels': ('audioChannels', {int_or_none}),
+                'tbr': ('avgBitrate', {int_or_none}),
+                'format': ('qualityType', {str}),
+                'filesize': ('size', {int_or_none}),
+                'duration': ('duration', {functools.partial(float_or_none, scale=1000)})
+            })
+
+            formats.extend(traverse_obj(info, (('mediaUrl', ('backupUrls', ...)), {
+                lambda u: url_or_none(u) and {'url': u, **format_info}})))
+
+        thumbnails = []
+        for image_info in traverse_obj(note_info, ('imageList', ...)):
+            thumbnail_info = traverse_obj(image_info, {
+                'height': ('height', {int_or_none}),
+                'width': ('width', {int_or_none}),
+            })
+            for thumb_url in traverse_obj(image_info, (('urlDefault', 'urlPre'), {url_or_none})):
+                thumbnails.append({
+                    'url': thumb_url,
+                    **thumbnail_info,
+                })
+
+        return {
+            'id': display_id,
+            'formats': formats,
+            'thumbnails': thumbnails,
+            'title': self._html_search_meta(['og:title'], webpage, default=None),
+            **traverse_obj(note_info, {
+                'title': ('title', {str}),
+                'description': ('desc', {str}),
+                'tags': ('tagList', ..., 'name', {str}),
+                'uploader_id': ('user', 'userId', {str}),
+            }),
+        }