From edecb5f81f561d30ef759c869e01bc4658f299a5 Mon Sep 17 00:00:00 2001
From: Grabien <60237587+Grabien@users.noreply.github.com>
Date: Wed, 16 Feb 2022 21:21:05 +0200
Subject: [PATCH] [extractor/cspan] Support of C-Span congress videos (#2295)

Authored by: Grabien
---
 yt_dlp/extractor/cspan.py      | 50 ++++++++++++++++++++++++++++++++--
 yt_dlp/extractor/extractors.py |  2 +-
 2 files changed, 49 insertions(+), 3 deletions(-)

diff --git a/yt_dlp/extractor/cspan.py b/yt_dlp/extractor/cspan.py
index c717aec3a..d29b58ba6 100644
--- a/yt_dlp/extractor/cspan.py
+++ b/yt_dlp/extractor/cspan.py
@@ -3,6 +3,7 @@
 import re
 
 from .common import InfoExtractor
+from ..compat import compat_HTMLParseError
 from ..utils import (
     determine_ext,
     ExtractorError,
@@ -11,9 +12,11 @@
     get_element_by_attribute,
     get_element_by_class,
     int_or_none,
+    join_nonempty,
     js_to_json,
     merge_dicts,
     parse_iso8601,
+    parse_qs,
     smuggle_url,
     str_to_int,
     unescapeHTML,
@@ -126,8 +129,12 @@ def add_referer(formats):
                         ext = 'vtt'
                     subtitle['ext'] = ext
             ld_info = self._search_json_ld(webpage, video_id, default={})
-            title = get_element_by_class('video-page-title', webpage) or \
-                self._og_search_title(webpage)
+            try:
+                title = get_element_by_class('video-page-title', webpage)
+            except compat_HTMLParseError:
+                title = None
+            if title is None:
+                title = self._og_search_title(webpage)
             description = get_element_by_attribute('itemprop', 'description', webpage) or \
                 self._html_search_meta(['og:description', 'description'], webpage)
             return merge_dicts(info, ld_info, {
@@ -242,3 +249,42 @@ def get_text_attr(d, attr):
                 'title': title,
                 'id': 'c' + video_id if video_type == 'clip' else video_id,
             }
+
+
+class CSpanCongressIE(InfoExtractor):
+    _VALID_URL = r'https?://(?:www\.)?c-span\.org/congress/'
+    _TESTS = [{
+        'url': 'https://www.c-span.org/congress/?chamber=house&date=2017-12-13&t=1513208380',
+        'info_dict': {
+            'id': 'house_2017-12-13',
+            'title': 'Congressional Chronicle - Members of Congress, Hearings and More',
+            'description': 'md5:54c264b7a8f219937987610243305a84',
+            'thumbnail': r're:https://ximage.c-spanvideo.org/.+',
+            'ext': 'mp4'
+        }
+    }]
+
+    def _real_extract(self, url):
+        query = parse_qs(url)
+        video_date = query.get('date', [None])[0]
+        video_id = join_nonempty(query.get('chamber', ['senate'])[0], video_date, delim='_')
+        webpage = self._download_webpage(url, video_id)
+        if not video_date:
+            jwp_date = re.search(r'jwsetup.clipprogdate = \'(?P<date>\d{4}-\d{2}-\d{2})\';', webpage)
+            if jwp_date:
+                video_id = f'{video_id}_{jwp_date.group("date")}'
+        jwplayer_data = self._parse_json(
+            self._search_regex(r'jwsetup\s*=\s*({(?:.|\n)[^;]+});', webpage, 'player config'),
+            video_id, transform_source=js_to_json)
+
+        title = (self._og_search_title(webpage, default=None)
+                 or self._html_search_regex(r'(?s)<title>(.*?)</title>', webpage, 'video title'))
+        description = (self._og_search_description(webpage, default=None)
+                       or self._html_search_meta('description', webpage, 'description', default=None))
+
+        return {
+            **self._parse_jwplayer_data(jwplayer_data, video_id, False),
+            'title': re.sub(r'\s+', ' ', title.split('|')[0]).strip(),
+            'description': description,
+            'http_headers': {'Referer': 'https://www.c-span.org/'},
+        }
diff --git a/yt_dlp/extractor/extractors.py b/yt_dlp/extractor/extractors.py
index b240d6553..923bf6de9 100644
--- a/yt_dlp/extractor/extractors.py
+++ b/yt_dlp/extractor/extractors.py
@@ -316,7 +316,7 @@
     CrunchyrollBetaIE,
     CrunchyrollBetaShowIE,
 )
-from .cspan import CSpanIE
+from .cspan import CSpanIE, CSpanCongressIE
 from .ctsnews import CtsNewsIE
 from .ctv import CTVIE
 from .ctvnews import CTVNewsIE