[extractor/dacast] Add extractors (#6896)

Closes #6163
Authored by: bashonly

2 files changed, 162 insertions, 0 deletions

diff --git a/yt_dlp/extractor/_extractors.py b/yt_dlp/extractor/_extractors.py
index 999b11378..0f65f1cc7 100644
--- a/yt_dlp/extractor/_extractors.py
+++ b/yt_dlp/extractor/_extractors.py
@@ -428,6 +428,10 @@ from .cybrary import (
     CybraryIE,
     CybraryCourseIE
 )
+from .dacast import (
+    DacastVODIE,
+    DacastPlaylistIE,
+)
 from .daftsex import DaftsexIE
 from .dailymail import DailyMailIE
 from .dailymotion import (
diff --git a/yt_dlp/extractor/dacast.py b/yt_dlp/extractor/dacast.py
new file mode 100644
index 000000000..cf683bad4
--- /dev/null
+++ b/yt_dlp/extractor/dacast.py
@@ -0,0 +1,158 @@
+import hashlib
+import re
+import time
+import urllib.error
+
+from .common import InfoExtractor
+from ..utils import (
+    ExtractorError,
+    classproperty,
+    float_or_none,
+    traverse_obj,
+    url_or_none,
+)
+
+
+class DacastBaseIE(InfoExtractor):
+    _URL_TYPE = None
+
+    @classproperty
+    def _VALID_URL(cls):
+        return fr'https?://iframe\.dacast\.com/{cls._URL_TYPE}/(?P<user_id>[\w-]+)/(?P<id>[\w-]+)'
+
+    @classproperty
+    def _EMBED_REGEX(cls):
+        return [rf'<iframe[^>]+\bsrc=["\'](?P<url>{cls._VALID_URL})']
+
+    _API_INFO_URL = 'https://playback.dacast.com/content/info'
+
+    @classmethod
+    def _get_url_from_id(cls, content_id):
+        user_id, media_id = content_id.split(f'-{cls._URL_TYPE}-')
+        return f'https://iframe.dacast.com/{cls._URL_TYPE}/{user_id}/{media_id}'
+
+    @classmethod
+    def _extract_embed_urls(cls, url, webpage):
+        yield from super()._extract_embed_urls(url, webpage)
+        for content_id in re.findall(
+                rf'<script[^>]+\bsrc=["\']https://player\.dacast\.com/js/player\.js\?contentId=([\w-]+-{cls._URL_TYPE}-[\w-]+)["\']', webpage):
+            yield cls._get_url_from_id(content_id)
+
+
+class DacastVODIE(DacastBaseIE):
+    _URL_TYPE = 'vod'
+    _TESTS = [{
+        'url': 'https://iframe.dacast.com/vod/acae82153ef4d7a7344ae4eaa86af534/1c6143e3-5a06-371d-8695-19b96ea49090',
+        'info_dict': {
+            'id': '1c6143e3-5a06-371d-8695-19b96ea49090',
+            'ext': 'mp4',
+            'uploader_id': 'acae82153ef4d7a7344ae4eaa86af534',
+            'title': '2_4||Adnexal mass characterisation: O-RADS US and MRI||N. Bharwani, London/UK',
+            'thumbnail': 'https://universe-files.dacast.com/26137208-5858-65c1-5e9a-9d6b6bd2b6c2',
+        },
+        'params': {'skip_download': 'm3u8'},
+    }]
+    _WEBPAGE_TESTS = [{
+        'url': 'https://www.dacast.com/support/knowledgebase/how-can-i-embed-a-video-on-my-website/',
+        'info_dict': {
+            'id': 'b6674869-f08a-23c5-1d7b-81f5309e1a90',
+            'ext': 'mp4',
+            'title': '4-HowToEmbedVideo.mp4',
+            'uploader_id': '3b67c4a9-3886-4eb1-d0eb-39b23b14bef3',
+            'thumbnail': 'https://universe-files.dacast.com/d26ab48f-a52a-8783-c42e-a90290ba06b6.png',
+        },
+        'params': {'skip_download': 'm3u8'},
+    }, {
+        'url': 'https://gist.githubusercontent.com/bashonly/4ad249ef2910346fbdf3809b220f11ee/raw/87349778d4af1a80b1fcc3beb9c88108de5858f5/dacast_embeds.html',
+        'info_dict': {
+            'id': 'e7df418e-a83b-7a7f-7b5e-1a667981e8fa',
+            'ext': 'mp4',
+            'title': 'Evening Service 2-5-23',
+            'uploader_id': '943bb1ab3c03695ba85330d92d6d226e',
+            'thumbnail': 'https://universe-files.dacast.com/337472b3-e92c-2ea4-7eb7-5700da477f67',
+        },
+        'params': {'skip_download': 'm3u8'},
+    }]
+
+    def _real_extract(self, url):
+        user_id, video_id = self._match_valid_url(url).group('user_id', 'id')
+        query = {'contentId': f'{user_id}-vod-{video_id}', 'provider': 'universe'}
+        info = self._download_json(self._API_INFO_URL, video_id, query=query, fatal=False)
+        access = self._download_json(
+            'https://playback.dacast.com/content/access', video_id,
+            note='Downloading access JSON', query=query, expected_status=403)
+
+        error = access.get('error')
+        if error in ('Broadcaster has been blocked', 'Content is offline'):
+            raise ExtractorError(error, expected=True)
+        elif error:
+            raise ExtractorError(f'Dacast API says "{error}"')
+
+        hls_url = access['hls']
+        hls_aes = {}
+
+        if 'DRM_EXT' in hls_url:
+            self.report_drm(video_id)
+        elif '/uspaes/' in hls_url:
+            # From https://player.dacast.com/js/player.js
+            ts = int(time.time())
+            signature = hashlib.sha1(
+                f'{10413792000 - ts}{ts}YfaKtquEEpDeusCKbvYszIEZnWmBcSvw').digest().hex()
+            hls_aes['uri'] = f'https://keys.dacast.com/uspaes/{video_id}.key?s={signature}&ts={ts}'
+
+        for retry in self.RetryManager():
+            try:
+                formats = self._extract_m3u8_formats(hls_url, video_id, 'mp4', m3u8_id='hls')
+            except ExtractorError as e:
+                # CDN will randomly respond with 403
+                if isinstance(e.cause, urllib.error.HTTPError) and e.cause.code == 403:
+                    retry.error = e
+                    continue
+                raise
+
+        return {
+            'id': video_id,
+            'uploader_id': user_id,
+            'formats': formats,
+            'hls_aes': hls_aes or None,
+            **traverse_obj(info, ('contentInfo', {
+                'title': 'title',
+                'duration': ('duration', {float_or_none}),
+                'thumbnail': ('thumbnailUrl', {url_or_none}),
+            })),
+        }
+
+
+class DacastPlaylistIE(DacastBaseIE):
+    _URL_TYPE = 'playlist'
+    _TESTS = [{
+        'url': 'https://iframe.dacast.com/playlist/943bb1ab3c03695ba85330d92d6d226e/b632eb053cac17a9c9a02bcfc827f2d8',
+        'playlist_mincount': 28,
+        'info_dict': {
+            'id': 'b632eb053cac17a9c9a02bcfc827f2d8',
+            'title': 'Archive Sermons',
+        },
+    }]
+    _WEBPAGE_TESTS = [{
+        'url': 'https://gist.githubusercontent.com/bashonly/7efb606f49f3c6e07ea0327de5a661d1/raw/05a16eac830245ea301fb0a585023bec71e6093c/dacast_playlist_embed.html',
+        'playlist_mincount': 28,
+        'info_dict': {
+            'id': 'b632eb053cac17a9c9a02bcfc827f2d8',
+            'title': 'Archive Sermons',
+        },
+    }]
+
+    def _real_extract(self, url):
+        user_id, playlist_id = self._match_valid_url(url).group('user_id', 'id')
+        info = self._download_json(
+            self._API_INFO_URL, playlist_id, note='Downloading playlist JSON', query={
+                'contentId': f'{user_id}-playlist-{playlist_id}',
+                'provider': 'universe',
+            })['contentInfo']
+
+        def entries(info):
+            for video in traverse_obj(info, ('features', 'playlist', 'contents', lambda _, v: v['id'])):
+                yield self.url_result(
+                    DacastVODIE._get_url_from_id(video['id']), DacastVODIE, video['id'], video.get('title'))
+
+        return self.playlist_result(entries(info), playlist_id, info.get('title'))