app/youtube/__init__.py

   1 import re
   2 import time
   3 import sqlite3
   4 import requests
   5 from urllib.parse import urlparse
   6 #from flask_login import current_user, login_required
   7 from flask_login import LoginManager, UserMixin, current_user, login_user, logout_user, login_required
   8 from flask import Blueprint, render_template, request, redirect, flash, url_for, jsonify, g, current_app
   9 from werkzeug.exceptions import NotFound, BadGateway
  10
  11 from ..common.common import *
  12 from ..common.anticaptcha import submit_captcha
  13 from .lib import *
  14
  15 frontend = Blueprint('youtube', __name__,
  16     template_folder='templates',
  17     static_folder='static',
  18     static_url_path='/static/yt')
  19
  20 @frontend.route('/')
  21 def index():
  22     return redirect(url_for('.feed'), code=302)
  23
  24 @frontend.route('/feed/subscriptions')
  25 # disabled for guest user: @login_required
  26 def feed():
  27     if current_user.is_anonymous:
  28         token = 'guest'
  29         if 'welcome_message' in cf['frontend']:
  30             flash(cf['frontend']['welcome_message'], "welcome")
  31     else:
  32         token = current_user.token
  33     page = int(request.args.get('page', 0))
  34     with sqlite3.connect(cf['global']['database']) as conn:
  35         c = conn.cursor()
  36         c.execute("""
  37            SELECT videos.id, channel_id, name, title, length, livestream, published, playlist_videos.playlist_id, display
  38              FROM videos
  39              JOIN channels ON videos.channel_id = channels.id
  40     LEFT JOIN playlist_videos ON (videos.id = playlist_videos.video_id)
  41         LEFT JOIN flags ON (videos.id = flags.video_id) AND (flags.user = ?)
  42         WHERE (channel_id IN (SELECT channel_id FROM subscriptions WHERE user=? AND type = 'channel')
  43                OR playlist_videos.playlist_id IN (SELECT channel_id FROM subscriptions WHERE user=? AND type = 'playlist')
  44                    OR flags.display = 'pinned')
  45                   AND flags.display IS NOT 'hidden'
  46          ORDER BY (display = 'pinned') DESC, crawled DESC
  47             LIMIT 36
  48            OFFSET 36*?""", (token, token, token, page))
  49         rows = [{
  50             'video_id': video_id,
  51             'channel_id': channel_id,
  52             'author': author,
  53             'title': title,
  54             'length': length,
  55             'livestream': livestream,
  56             'published': published,
  57             'playlist': playlist,
  58             'pinned': display == 'pinned',
  59         } for (video_id, channel_id, author, title, length, livestream, published, playlist, display) in c.fetchall()]
  60     return render_template('index.html.j2', rows=rows, page=page)
  61
  62 @frontend.route('/watch')
  63 def watch():
  64     if current_user.is_anonymous:
  65         token = 'guest'
  66     else:
  67         token = current_user.token
  68
  69     if not 'v' in request.args:
  70         return "missing video id", 400
  71
  72     plaintextheaders = {
  73         'content-type': 'text/plain',
  74         'Link': "<data:text/css,body%7Bcolor:%23eee;background:%23333%7D>; rel=stylesheet;"
  75     }
  76
  77     video_id = request.args.get('v')
  78     sts, algo = get_cipher()
  79     video_url, stream_map, metadata, error, errdetails = get_video_info(video_id, sts, algo)
  80
  81     extra = {'geolocked':'local=1', 'livestream':'raw=0'}.get(error,'')
  82     invidious_url = f"https://invidious.snopyta.org/watch?v={video_id}&{extra}"
  83     errdetails = {
  84         'banned':     "Instance is being rate limited.",
  85         'malformed':  "Video ID is invalid.",
  86         'geolocked':  "This video is geolocked.",
  87         'livestream': "Livestreams not supported on this instance.",
  88         'exhausted':  errdetails or "Couldn't extract video URLs.",
  89         'player':     errdetails,
  90     }.get(error)
  91
  92     # if the video is geolocked, and the proxy is enabled, we can still play it:
  93     if error == 'geolocked' and 'proxy' in current_app.blueprints.keys():
  94         videoplayback = url_for('proxy.videoplayback')
  95         query = urlparse(video_url).query
  96         video_url = f"{videoplayback}?{query}"
  97         for s in stream_map['adaptive']:
  98             query = urlparse(s['url']).query
  99             s['url'] = f"{videoplayback}?{query}"
 100         for s in stream_map['muxed']:
 101             query = urlparse(s['url']).query
 102             s['url'] = f"{videoplayback}?{query}"
 103         error = None
 104
 105     # if the proxy is enabled, we can also play livestreams:
 106     if error == 'livestream' and 'proxy' in current_app.blueprints.keys():
 107         # Note: hlsManifestUrl's hostname will be replaced client-side
 108         video_url = stream_map['hlsManifestUrl']
 109         error = None
 110
 111     # if the instance is blocked, try submitting a job to the anti captcha service:
 112     if error == 'banned' and cf['captcha']['api_key']:
 113         r2 = requests.get(f'https://www.youtube.com/watch?v={video_id}&hl=en&gl=US')
 114         status = submit_captcha(r2)
 115         if status is False:
 116             raise Exception("we are banned, but captcha wasn't triggered!")
 117         else:
 118             message = "right now" if status is True else f"{int(status)} seconds ago"
 119             raise BadGateway(f"""
 120                 {errdetails} An attempt at getting unblocked has been made {message}.
 121                 Please try again in 30 seconds.
 122             """)
 123
 124     show = request.args.get("show")
 125     if show == "raw":
 126         if error:
 127             msg = errdetails if error=='player' else f"{error.upper()}: {errdetails}"
 128             return f"{msg}\n\nRedirecting to Invidious.", 502, {
 129                 'Refresh': f'2; URL={invidious_url}&raw=1',
 130                 **plaintextheaders}
 131         return redirect(video_url, code=307)
 132     elif show == "json":
 133         if error and not metadata:
 134             return {'error': True, error: errdetails}, 400 # TODO: better (test _CpR4o81XQc)
 135         return jsonify(metadata)
 136     elif show == "audio":
 137         # sorting: we want to prioritize mp4a over opus, and sort by highest quality first
 138         # todo: geolocking; prefer open format?
 139         if error and not metadata:
 140             msg = errdetails if error=='player' else f"{error.upper()}: {errdetails}"
 141             return msg, 400, plaintextheaders # TODO: nicer
 142         stream = next(iter(sorted([
 143                     stream for stream in stream_map['adaptive']
 144                     if stream['mimeType'].startswith('audio/')],
 145                 key=lambda stream: ('opus' not in stream['mimeType'],
 146                     stream['bitrate']), reverse=True)
 147             ),{}).get('url')
 148         return redirect(stream)
 149     else:
 150         if error and not metadata: # e.g. malformed, private/deleted video, ...
 151             return render_template('video-error.html.j2', video_id=video_id,
 152                 video_error=error, errdetails=errdetails, invidious_url=invidious_url)
 153         meta = prepare_metadata(metadata)
 154         with sqlite3.connect(cf['global']['database']) as conn:
 155             c = conn.cursor()
 156             c.execute("""
 157             SELECT COUNT((
 158                 SELECT 1 FROM subscriptions WHERE channel_id = ? AND user = ?
 159             )), COUNT((
 160                 SELECT 1 FROM flags WHERE video_id = ? AND display = 'pinned' AND user = ?
 161             ))""", (meta['channel_id'], token, video_id, token))
 162             (is_subscribed, is_pinned) = c.fetchone()
 163             return render_template('watch.html.j2',
 164                 video_id=video_id, video_url=video_url, stream_map=stream_map,
 165                 video_error=error, errdetails=errdetails, invidious_url=invidious_url,
 166                 is_pinned=is_pinned, is_subscribed=is_subscribed,
 167                 **meta)
 168
 169 @frontend.route('/embed/videoseries')
 170 def embed_videoseries():
 171     return redirect(url_for('.playlist', list=request.args.get('list')))
 172 @frontend.route('/embed/<video_id>')
 173 def embed(video_id):
 174     if video_id == "videoseries":
 175         return redirect(url_for('.playlist', list=request.args.get('list')))
 176
 177     return redirect(url_for('.watch', v=video_id, t=request.args.get('start')))
 178
 179 @frontend.route('/<something>', strict_slashes=False)
 180 def plain_user_or_video(something):
 181     # yt.com interprets this as a username, but we also want to catch youtu.be
 182     # short-urls. so we check if it's a channel by querying the RSS feed (this
 183     # shoudn't be rate-limited); if that fails, check if it looks like a video
 184     # id; or finally give up.
 185     if '.' not in something and channel_exists(something):
 186         # periods are not valid in usernames, vanity urls or ucids, but common
 187         # in urls that get crawled by bots (e.g. index.php). failing early
 188         # reduces the amount of invalid channel names getting looked up.
 189         return redirect(url_for('.channel', channel_id=something))
 190     elif re.match(r"^[-_0-9A-Za-z]{11}$", something): # looks like a video id
 191         return redirect(url_for('.watch', v=something, t=request.args.get('t')))
 192     else: # ¯\_(ツ)_/¯
 193         # XXX: something == 'thethoughtemporium' -> 404s
 194         raise NotFound("Note: some usernames not recognized; try searching it")
 195
 196 @frontend.route('/channel/<channel_id>/<subpage>')
 197 @frontend.route('/user/<channel_id>/<subpage>')
 198 @frontend.route('/c/<channel_id>/<subpage>')
 199 @frontend.route('/channel/<channel_id>/')
 200 @frontend.route('/user/<channel_id>/')
 201 @frontend.route('/c/<channel_id>/')
 202 def channel(channel_id, _=None):
 203     token = getattr(current_user, 'token', 'guest')
 204
 205     if re.match(r"(UC[A-Za-z0-9_-]{22})", channel_id):
 206         xmlfeed = fetch_xml("channel_id", channel_id)
 207     else:
 208         xmlfeed = fetch_xml("user", channel_id)
 209
 210     if not xmlfeed:
 211         return "not found or something", 404 # XXX
 212     title, author, videos, channel_id, _ = parse_xml(xmlfeed)
 213
 214     with sqlite3.connect(cf['global']['database']) as conn:
 215         c = conn.cursor()
 216         c.execute("""
 217             SELECT COUNT(*)
 218               FROM subscriptions
 219              WHERE channel_id = ? AND user = ?
 220         """, (channel_id, token))
 221         (is_subscribed,) = c.fetchone()
 222
 223     return render_template('xmlfeed.html.j2', title=author, rows=videos,
 224         is_subscribed=is_subscribed, channel_id=channel_id)
 225
 226 @frontend.route('/playlist')
 227 def playlist():
 228     playlist_id = request.args.get('list')
 229     if not playlist_id:
 230         return "bad list id", 400 # todo
 231
 232     xmlfeed = fetch_xml("playlist_id", playlist_id)
 233     if not xmlfeed:
 234         return "not found or something", 404 # XXX
 235     title, author, videos, _, _ = parse_xml(xmlfeed)
 236     return render_template('xmlfeed.html.j2', title=f"{title} by {author}", rows=videos)
 237
 238 @frontend.route('/api/timedtext')
 239 def timedtext():
 240     r = requests.get("https://www.youtube.com/api/timedtext", request.args.to_dict())
 241     # Note: in srv1 format, xmlentities are double-encoded m( a smart quote is
 242     # even worse: it's '&amp;39;<smartquote>' wtf!? (at least vvt seems ok)
 243     if not r.ok:
 244         return "error: {r.text}", 400 # TODO: better
 245     retval = r.text
 246     if request.args.get('fmt') == 'vtt' and request.args.get('kind') == 'asr':
 247         # autocaptions are extremely confusing, and stuck in the lower-left corner. fix it up a bit
 248         retval = re.sub(r"<.+?>", "", retval) # remove inline html-like markup that times each word/adds styles
 249         retval = retval.replace("align:start position:0%", "") # let browser position the text itself
 250         # each subtitle-line is repeated twice (first on the lower line, then
 251         # on the next "frame" on the upper line). we want to remove the
 252         # repetition, as that's confusing without word and line animations:
 253         lines = retval.split('\n')
 254         retval = '\n'.join([line for line, prev in zip(lines, ['']+lines) if not " --> " in prev])
 255     return retval, {'Content-Type': r.headers.get("Content-Type")}
 256
 257 @frontend.route('/manage/subscriptions')
 258 # disabled for guest user: @login_required
 259 def subscription_manager():
 260     if current_user.is_anonymous:
 261         token = 'guest'
 262     else:
 263         token = current_user.token
 264     with sqlite3.connect(cf['global']['database']) as conn:
 265         #with conn.cursor() as c:
 266             c = conn.cursor()
 267             c.execute("""
 268                   SELECT subscriptions.channel_id, name, type,
 269                          (subscribed_until < datetime('now')) AS obsolete
 270                     FROM subscriptions
 271                     LEFT JOIN (SELECT name, id FROM channels
 272                        UNION
 273                        SELECT name, id FROM playlists
 274                       ) AS channels ON channels.id = subscriptions.channel_id
 275                     left JOIN websub ON channels.id = websub.channel_id
 276                    WHERE user = ?
 277                      AND subscriptions.type IN ('channel', 'playlist')
 278                 ORDER BY obsolete=0, name COLLATE NOCASE ASC""", (token,))
 279             rows = [{
 280                 'channel_id': channel_id,
 281                 'author': author or channel_id,
 282                 'type': type,
 283                 'subscribed_until': subscribed_until
 284             } for (channel_id, author, type, subscribed_until) in c.fetchall()]
 285     return render_template('subscription_manager.html.j2', rows=rows)
 286
 287 @frontend.route('/feed/subscriptions', methods=['POST'])
 288 @login_required
 289 def feed_post():
 290     token = current_user.token
 291     action = next(request.form.keys(), None)
 292     if action in ['pin', 'unpin', 'hide', 'unhide']:
 293         video_id = request.form.get(action)
 294         display = {
 295             'pin': 'pinned',
 296             'unpin': None,
 297             'hide': 'hidden',
 298             'unhide': None,
 299         }[action]
 300         with sqlite3.connect(cf['global']['database']) as conn:
 301             c = conn.cursor()
 302             store_video_metadata(video_id) # only needed for pinning
 303             c.execute("""
 304                 INSERT OR REPLACE INTO flags (user, video_id, display)
 305                 VALUES (?, ?, ?)
 306             """, (token, video_id, display))
 307         undo_flash(video_id, action)
 308     else:
 309         flash("unsupported action", "error")
 310     return redirect(request.url, code=303)
 311
 312 @frontend.route('/manage/subscriptions', methods=['POST'])
 313 @login_required
 314 def manage_subscriptions():
 315     token = current_user.token
 316     if 'subscribe' in request.form:
 317         some_id = request.form.get("subscribe")
 318         match = re.search(r"(UC[A-Za-z0-9_-]{22})", some_id)
 319         if match:
 320             some_id = match.group(1)
 321             id_type = "channel"
 322         else:
 323             match = re.search(r"((?:PL|LL|EC|UU|FL|UL|OL)[A-Za-z0-9_-]{10,})", some_id)
 324             if match:  # NOTE: PL-playlists are 32chars, others differ in length.
 325                 some_id = match.group(1)
 326                 id_type = "playlist"
 327             else:
 328                 flash("not a valid/subscribable URI", "error")
 329                 return redirect(request.url, code=303)
 330         with sqlite3.connect(cf['global']['database']) as conn:
 331             #with conn.cursor() as c:
 332                 c = conn.cursor()
 333                 c.execute("""
 334                         INSERT OR IGNORE INTO subscriptions (user, channel_id, type)
 335                         VALUES (?, ?, ?)
 336                 """, (token, some_id, id_type))
 337                 # TODO: sql-error-handling, asynchronically calling update-subs.pl
 338         undo_flash(some_id, 'subscribe')
 339
 340     elif 'unsubscribe' in request.form:
 341         some_id = request.form.get("unsubscribe")
 342         with sqlite3.connect(cf['global']['database']) as conn:
 343             #with conn.cursor() as c:
 344                 c = conn.cursor()
 345                 c.execute("""
 346                         DELETE FROM subscriptions
 347                         WHERE user = ? AND channel_id = ?
 348                 """, (token, some_id))
 349                 # TODO: sql-error-handling, report success
 350         undo_flash(some_id, 'unsubscribe')
 351
 352     else:
 353         flash("unsupported action", "error")
 354
 355     return redirect(request.url, code=303)
 356
 357 def get_cipher():
 358     # reload cipher from database every 1 hour
 359     if 'cipher' not in g or time.time() - g.get('cipher_updated', 0) > 1 * 60 * 60:
 360         with sqlite3.connect(cf['global']['database']) as conn:
 361             c = conn.cursor()
 362             c.execute("SELECT sts, algorithm FROM cipher")
 363             g.cipher = c.fetchone()
 364             g.cipher_updated = time.time()
 365
 366     return g.cipher
 367
 368 #@frontend.teardown_appcontext
 369 #def teardown_db():
 370 #    db = g.pop('db', None)
 371 #
 372 #    if db is not None:
 373 #        db.close()
 374
 375 def undo_flash(thing_id, action):
 376     undo_action, past_action = {
 377         'pin': ('unpin', 'pinned'),
 378         'unpin': ('pin', 'unpinned'),
 379         'hide': ('unhide', 'hidden'),
 380         'unhide': ('hide', 'unhidden'),
 381         'subscribe': ('unsubscribe', 'subscribed'),
 382         'unsubscribe': ('subscribe', 'unsubscribed'),
 383     }.get(action)
 384     if 'subscribe' in action and thing_id.startswith('UC'):
 385         thing = "channel"
 386         thing_url = url_for('.channel', channel_id=thing_id)
 387     elif 'subscribe' in action:
 388         thing = "playlist"
 389         thing_url = url_for('.playlist', playlist_id=thing_id)
 390     else:
 391         thing = "video"
 392         thing_url = url_for('.watch', v=thing_id)
 393     flash(f'''
 394         <form method=post><input type=hidden name="{undo_action}" value="{thing_id}">
 395         <a href="{thing_url}">{thing}</a> {past_action}.
 396         <label><input type="submit" hidden>
 397         <span style="text-decoration:underline;cursor:pointer">undo</span>.
 398         </label></form>''', "info")
 399
 400 @frontend.app_template_filter('format_date')
 401 def format_date(s):
 402     import datetime # can't import at top level, because it is inherited from common
 403     (y,m,d) = (int(n) for n in s.split('T')[0].split(' ')[0].split('-'))  # iso-dates can seperate date from time with space or 'T'
 404     M = '_ Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec'.split()
 405     if y == datetime.datetime.now().year:
 406         return f"{d} {M[m]}"
 407     else:
 408         return f"{M[m]} '{y%100}"
 409
 410 @frontend.app_template_filter('format_time')
 411 def format_time(i):
 412     if i is None:
 413         return None
 414     h = i // (60*60)
 415     m = i // 60 % 60
 416     s = i % 60
 417     return '%d:%02d:%02d' % (h,m,s) if h else '%02d:%02d' % (m,s)
 418
 419 @frontend.app_template_filter('timeoffset')
 420 def timeoffset(s):
 421     if s is None:
 422         return None
 423     match = re.match(r"^(\d+)s?$", s)  # e.g. 2040s
 424     if match:
 425         return match.group(1)
 426     match = re.match(r"^(?:(\d+)h)?(?:(\d+)m)?(?:(\d+)s)?$", s)  # e.g. 34m, 1h23s
 427     if match:
 428         return ":".join([n.zfill(2) for n in match.groups('0')])
 429     return None