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 = request.args.get('page', 0, type=int)
  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, premiere, 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             'premiere': premiere and (# only if it hasn't yet premiered:
  57                 datetime.strptime(published+'+0000', "%Y-%m-%d %H:%M:%S%z")>datetime.now(tz=timezone.utc)
  58             ),
  59             'published': published,
  60             'playlist': playlist,
  61             'pinned': display == 'pinned',
  62         } for (video_id, channel_id, author, title, length, livestream, premiere, published, playlist, display) in c.fetchall()]
  63     return render_template('index.html.j2', rows=rows, page=page)
  64
  65 @frontend.route('/watch')
  66 def watch():
  67     if current_user.is_anonymous:
  68         token = 'guest'
  69     else:
  70         token = current_user.token
  71
  72     if not 'v' in request.args:
  73         return "missing video id", 400
  74     if len(request.args.get('v')) != 11:
  75         return "malformed video id", 400
  76
  77     plaintextheaders = {
  78         'content-type': 'text/plain',
  79         'Link': "<data:text/css,body%7Bcolor:%23eee;background:%23333%7D>; rel=stylesheet;"
  80     }
  81
  82     video_id = request.args.get('v')
  83     show = request.args.get("show")
  84     itag = request.args.get("itag")
  85     video_url, stream_map, metadata, error, errdetails = get_video_info(video_id, metaOnly=(show == 'meta'))
  86
  87     if itag:  # if itag is specified and available, force its use even if not highest resolution
  88         video_url = next((e['url'] for e in stream_map['muxed'] if e['itag'] == int(itag)), video_url)
  89
  90     proxy_on = getattr(g, 'proxy_on', None)
  91     proxy_msg = {
  92         False: "Log in to use proxy.", # proxy for logged-in users only
  93         None: "", # proxy disabled globally
  94         True: "", # proxy is available to this user
  95     }[proxy_on]
  96     extra = {'geolocked':'local=1', 'livestream':'raw=0'}.get(error,'')
  97     invidious_url = f"https://invidious.snopyta.org/watch?v={video_id}&{extra}"
  98     errdetails = {
  99         'banned':     "Instance is being rate limited.",
 100         'malformed':  "Video ID is invalid.",
 101         'geolocked':  f"This video is geolocked. {proxy_msg}",
 102         'livestream': f"Livestreams disabled. {proxy_msg}",
 103         'agegated':   "Unable to bypass age-restriction.",
 104         'no-url':     "No muxed stream available.",
 105         'exhausted':  errdetails or "Couldn't extract video URLs.",
 106         'player':     errdetails,
 107     }.get(error, error)
 108
 109     # if the video is geolocked, and the proxy is enabled, we can still play
 110     # it, if the video is available in the instance server's region:
 111     if error == 'geolocked' and video_url and proxy_on:
 112         videoplayback = url_for('proxy.videoplayback')
 113         query = urlparse(video_url).query
 114         video_url = f"{videoplayback}?{query}"
 115         for t in ('adaptive_video', 'adaptive_audio', 'muxed'):
 116             for s in stream_map[t]:
 117                 query = urlparse(s['url']).query
 118                 s['url'] = f"{videoplayback}?{query}"
 119         error = None
 120
 121     # if the proxy is enabled, we can also play livestreams:
 122     if error == 'livestream' and proxy_on:
 123         # Note: hlsManifestUrl's hostname will be replaced client-side
 124         video_url = stream_map['hlsManifestUrl']
 125         error = None
 126
 127     # if the instance is blocked, try submitting a job to the anti captcha service:
 128     if error == 'banned' and cf['captcha']['api_key']:
 129         r2 = requests.get(f'https://www.youtube.com/watch?v={video_id}&hl=en&gl=US')
 130         status = submit_captcha(r2)
 131         if status is False:
 132             raise Exception("we are banned, but captcha wasn't triggered!")
 133         else:
 134             message = "right now" if status is True else f"{int(status)} seconds ago"
 135             raise BadGateway(f"""
 136                 {errdetails} An attempt at getting unblocked has been made {message}.
 137                 Please try again in 30 seconds.
 138             """)
 139
 140     if show == "raw":
 141         if error:
 142             msg = errdetails if error=='player' else f"{error.upper()}: {errdetails}"
 143             return f"{msg}\n\nRedirecting to Invidious.", 502, {
 144                 'Refresh': f'2; URL={invidious_url}&raw=1',
 145                 **plaintextheaders}
 146         return redirect(video_url, code=307)
 147     elif show == "json":
 148         if error and not metadata:
 149             return {'error': True, error: errdetails}, 400 # TODO: better (test _CpR4o81XQc)
 150         return jsonify(metadata)
 151     elif show == "audio":
 152         # sorting: we want to prioritize mp4a over opus, and sort by highest quality first
 153         # todo: geolocking; prefer open format?
 154         if error and not stream_map:
 155             msg = errdetails if error=='player' else f"{error.upper()}: {errdetails}"
 156             return msg, 400, plaintextheaders # TODO: nicer
 157         stream = next(iter(sorted(
 158             stream_map['adaptive_audio'],
 159             key=lambda e: ('opus' not in e['mimeType'], e['bitrate']),
 160             reverse=True
 161         )),{}).get('url')
 162         return redirect(stream)
 163     elif show == "meta":
 164         # this is the subset of (useful) keys that are not present in the
 165         # Android API response. the special key '_' contains ready-to-use
 166         # parsed versions of that data.
 167         if error and not metadata:
 168             return {'error': True, error: errdetails}, 400 # TODO: better (test _CpR4o81XQc)
 169         parsed = microformat_parser(metadata)
 170         return {'microformat': metadata.get('microformat'),'cards':metadata.get('cards'), '_':parsed}
 171     else:
 172         if error and not metadata: # e.g. malformed, private/deleted video, ...
 173             return render_template('video-error.html.j2', video_id=video_id,
 174                 video_error=error, errdetails=errdetails, invidious_url=invidious_url)
 175         meta = prepare_metadata(metadata)
 176         with sqlite3.connect(cf['global']['database']) as conn:
 177             c = conn.cursor()
 178             c.execute("""
 179             SELECT COUNT((
 180                 SELECT 1 FROM subscriptions WHERE channel_id = ? AND user = ?
 181             )), COUNT((
 182                 SELECT 1 FROM flags WHERE video_id = ? AND display = 'pinned' AND user = ?
 183             ))""", (meta['channel_id'], token, video_id, token))
 184             (is_subscribed, is_pinned) = c.fetchone()
 185             return render_template('watch.html.j2',
 186                 video_id=video_id, video_url=video_url, stream_map=stream_map,
 187                 video_error=error, errdetails=errdetails, invidious_url=invidious_url,
 188                 is_pinned=is_pinned, is_subscribed=is_subscribed,
 189                 **meta)
 190
 191 @frontend.route('/embed/videoseries')
 192 def embed_videoseries():
 193     return redirect(url_for('.playlist', list=request.args.get('list')))
 194 @frontend.route('/embed/<video_id>', strict_slashes=False)
 195 def embed(video_id):
 196     if video_id == "videoseries":
 197         return redirect(url_for('.playlist', list=request.args.get('list')))
 198
 199     return redirect(url_for('.watch', v=video_id, t=request.args.get('start')))
 200
 201 @frontend.route('/live/<video_id>', strict_slashes=False)
 202 @frontend.route('/shorts/<video_id>', strict_slashes=False)
 203 def shorts_or_live(video_id):
 204     return redirect(url_for('.watch', v=video_id, t=request.args.get('start')))
 205
 206 @frontend.route('/<something>', strict_slashes=False)
 207 def plain_user_or_video(something):
 208     # yt.com interprets this as a username, but we also want to catch youtu.be
 209     # short-urls. so we check if it's a channel by querying the RSS feed (this
 210     # shoudn't be rate-limited); if that fails, check if it looks like a video
 211     # id; or finally give up.
 212     if '.' not in something and channel_exists(something):
 213         # periods are not valid in usernames, vanity urls or ucids, but common
 214         # in urls that get crawled by bots (e.g. index.php). failing early
 215         # reduces the amount of invalid channel names getting looked up.
 216         return redirect(url_for('.channel', channel_id=something))
 217     elif re.match(r"^[-_0-9A-Za-z]{11}$", something): # looks like a video id
 218         return redirect(url_for('.watch', v=something, t=request.args.get('t')))
 219     else: # ¯\_(ツ)_/¯
 220         # XXX: something == 'thethoughtemporium' -> 404s
 221         raise NotFound("Note: some usernames not recognized; try searching it")
 222
 223 @frontend.route('/c/<channel_id>/<subpage>')
 224 @frontend.route('/c/<channel_id>/')
 225 @frontend.route('/user/<channel_id>/<subpage>')
 226 @frontend.route('/user/<channel_id>/')
 227 def channel_redirect(channel_id, subpage=None):
 228     # Note: we can't check /c/, so we have to assume it is the same as /user/,
 229     # which is sometimes wrong.
 230     xmlfeed = fetch_xml("user", channel_id)
 231
 232     if not xmlfeed:
 233         raise NotFound("unknown channel name")
 234
 235     _, _, _, channel_id, _ = parse_xml(xmlfeed)
 236
 237     return redirect(url_for('.channel', channel_id=channel_id))
 238
 239 @frontend.route('/channel/<channel_id>/<subpage>')
 240 @frontend.route('/channel/<channel_id>/')
 241 def channel(channel_id, _=None):
 242     token = getattr(current_user, 'token', 'guest')
 243     sort = request.args.get("sort", "newest")
 244
 245     if not re.match(r"(UC[A-Za-z0-9_-]{22})", channel_id):
 246         # canonicalize channel id, otherwise popular won't work
 247         return redirect(url_for('.channel_redirect', channel_id=channel_id))
 248
 249     if sort == "popular":
 250         xmlfeed = fetch_xml("playlist_id", f"PU{channel_id[2:]}")
 251     else:
 252         xmlfeed = fetch_xml("channel_id", channel_id)
 253         #^note: could also use playlist_id=UU...
 254
 255     if not xmlfeed:
 256         raise NotFound("unknown channel id")
 257
 258     title, author, videos, channel_id, _ = parse_xml(xmlfeed)
 259
 260     with sqlite3.connect(cf['global']['database']) as conn:
 261         c = conn.cursor()
 262         c.execute("""
 263             SELECT COUNT(*)
 264               FROM subscriptions
 265              WHERE channel_id = ? AND user = ?
 266         """, (channel_id, token))
 267         (is_subscribed,) = c.fetchone()
 268
 269     return render_template('xmlfeed.html.j2', title=author, rows=videos,
 270         is_subscribed=is_subscribed, channel_id=channel_id)
 271
 272 @frontend.route('/playlist')
 273 def playlist():
 274     playlist_id = request.args.get('list')
 275     if not playlist_id:
 276         return "bad list id", 400 # todo
 277
 278     xmlfeed = fetch_xml("playlist_id", playlist_id)
 279     if not xmlfeed:
 280         return "not found or something", 404 # XXX
 281     title, author, videos, _, _ = parse_xml(xmlfeed)
 282     return render_template('xmlfeed.html.j2', title=f"{title} by {author}", rows=videos)
 283
 284 @frontend.route('/api/timedtext')
 285 def timedtext():
 286     r = requests.get("https://www.youtube.com/api/timedtext", request.args.to_dict())
 287     # Note: in srv1 format, xmlentities are double-encoded m( a smart quote is
 288     # even worse: it's '&amp;39;<smartquote>' wtf!? (at least vvt seems ok)
 289     if not r.ok:
 290         return "error: {r.text}", 400 # TODO: better
 291     retval = r.text
 292     if request.args.get('fmt') == 'vtt' and request.args.get('kind') == 'asr':
 293         # autocaptions are extremely confusing, and stuck in the lower-left corner. fix it up a bit
 294         retval = re.sub(r"<.+?>", "", retval) # remove inline html-like markup that times each word/adds styles
 295         retval = retval.replace("align:start position:0%", "") # let browser position the text itself
 296         # each subtitle-line is repeated twice (first on the lower line, then
 297         # on the next "frame" on the upper line). we want to remove the
 298         # repetition, as that's confusing without word and line animations:
 299         lines = retval.split('\n')
 300         retval = '\n'.join([line for line, prev in zip(lines, ['']+lines) if not " --> " in prev])
 301     return retval, {'Content-Type': r.headers.get("Content-Type")}
 302
 303 @frontend.route('/manage/subscriptions')
 304 # disabled for guest user: @login_required
 305 def subscription_manager():
 306     if current_user.is_anonymous:
 307         token = 'guest'
 308     else:
 309         token = current_user.token
 310     with sqlite3.connect(cf['global']['database']) as conn:
 311         #with conn.cursor() as c:
 312             c = conn.cursor()
 313             c.execute("""
 314                   SELECT subscriptions.channel_id, name, type,
 315                          (subscribed_until < datetime('now')) AS obsolete
 316                     FROM subscriptions
 317                     LEFT JOIN (SELECT name, id FROM channels
 318                        UNION
 319                        SELECT name, id FROM playlists
 320                       ) AS channels ON channels.id = subscriptions.channel_id
 321                     left JOIN websub ON channels.id = websub.channel_id
 322                    WHERE user = ?
 323                      AND subscriptions.type IN ('channel', 'playlist')
 324                 ORDER BY obsolete=0, name COLLATE NOCASE ASC""", (token,))
 325             rows = [{
 326                 'channel_id': channel_id,
 327                 'author': author or channel_id,
 328                 'type': type,
 329                 'subscribed_until': subscribed_until
 330             } for (channel_id, author, type, subscribed_until) in c.fetchall()]
 331     return render_template('subscription_manager.html.j2', rows=rows)
 332
 333 @frontend.route('/feed/subscriptions', methods=['POST'])
 334 @login_required
 335 def feed_post():
 336     token = current_user.token
 337     action = next(iter(list(request.form.keys())), None)
 338     if action in ['pin', 'unpin', 'hide', 'unhide']:
 339         video_id = request.form.get(action)
 340         display = {
 341             'pin': 'pinned',
 342             'unpin': None,
 343             'hide': 'hidden',
 344             'unhide': None,
 345         }[action]
 346         with sqlite3.connect(cf['global']['database']) as conn:
 347             c = conn.cursor()
 348             store_video_metadata(video_id) # only needed for pinning
 349             c.execute("""
 350                 INSERT OR REPLACE INTO flags (user, video_id, display)
 351                 VALUES (?, ?, ?)
 352             """, (token, video_id, display))
 353         undo_flash(video_id, action)
 354     else:
 355         flash("unsupported action", "error")
 356     return redirect(request.url, code=303)
 357
 358 @frontend.route('/manage/subscriptions', methods=['POST'])
 359 @login_required
 360 def manage_subscriptions():
 361     token = current_user.token
 362     if 'subscribe' in request.form:
 363         some_id = request.form.get("subscribe")
 364         match = re.search(r"(UC[A-Za-z0-9_-]{22})", some_id)
 365         if match:
 366             some_id = match.group(1)
 367             id_type = "channel"
 368         else:
 369             match = re.search(r"((?:PL|LL|EC|UU|FL|UL|OL)[A-Za-z0-9_-]{10,})", some_id)
 370             if match:  # NOTE: PL-playlists are 32chars, others differ in length.
 371                 some_id = match.group(1)
 372                 id_type = "playlist"
 373             else:
 374                 flash("not a valid/subscribable URI", "error")
 375                 return redirect(request.url, code=303)
 376         with sqlite3.connect(cf['global']['database']) as conn:
 377             #with conn.cursor() as c:
 378                 c = conn.cursor()
 379                 c.execute("""
 380                         INSERT OR IGNORE INTO subscriptions (user, channel_id, type)
 381                         VALUES (?, ?, ?)
 382                 """, (token, some_id, id_type))
 383                 # TODO: sql-error-handling, asynchronically calling update-subs.pl
 384         undo_flash(some_id, 'subscribe')
 385
 386     elif 'unsubscribe' in request.form:
 387         some_id = request.form.get("unsubscribe")
 388         with sqlite3.connect(cf['global']['database']) as conn:
 389             #with conn.cursor() as c:
 390                 c = conn.cursor()
 391                 c.execute("""
 392                         DELETE FROM subscriptions
 393                         WHERE user = ? AND channel_id = ?
 394                 """, (token, some_id))
 395                 # TODO: sql-error-handling, report success
 396         undo_flash(some_id, 'unsubscribe')
 397
 398     else:
 399         flash("unsupported action", "error")
 400
 401     return redirect(request.url, code=303)
 402
 403 @frontend.route('/vi/<vid>/<res>.jpg')
 404 def redirect_thumbnails(vid, res):
 405     return redirect(f"https://i.ytimg.com{request.path}", code=301)
 406
 407 @frontend.record
 408 def redirect_youtube_dot_com(state):
 409     """
 410     This is executed when the blueprint is loaded dynamically builds a number
 411     of routes so that URLs like
 412     https://subscriptions.gir.st/https://www.youtube.com/watch?v=dQw4w9WgXcQ
 413     redirect to the /watch page. Works with /watch, /embed/ and youtu.be short
 414     links, with or without protocl and/or 'www'.
 415     """
 416     def real_redirect_youtube_dot_com(video_id=None):
 417         if not re.match(r"^[-_0-9A-Za-z]{11}$", video_id or ''): video_id = None
 418         if not video_id: video_id = request.args.get('v')
 419         return redirect(url_for('.watch', v=video_id))
 420
 421     for protocol in ("", "http://", "https://"):
 422         for prefix in ("", "www.", "m."):
 423             for domain in ("youtube.com", "youtu.be", "youtube-nocookie.com"):
 424                 for urlpath in ("/watch", "/embed/<video_id>", "/<video_id>"):
 425                     if domain != "youtu.be" and urlpath == "/<video_id>":
 426                         continue # that's a channel, not a video
 427                     frontend.add_url_rule(
 428                         f"/{protocol}{prefix}{domain}{urlpath}",
 429                         view_func=real_redirect_youtube_dot_com,
 430                         strict_slashes=False
 431                     )
 432
 433 def undo_flash(thing_id, action):
 434     undo_action, past_action = {
 435         'pin': ('unpin', 'pinned'),
 436         'unpin': ('pin', 'unpinned'),
 437         'hide': ('unhide', 'hidden'),
 438         'unhide': ('hide', 'unhidden'),
 439         'subscribe': ('unsubscribe', 'subscribed'),
 440         'unsubscribe': ('subscribe', 'unsubscribed'),
 441     }.get(action)
 442     if 'subscribe' in action and thing_id.startswith('UC'):
 443         thing = "channel"
 444         thing_url = url_for('.channel', channel_id=thing_id)
 445     elif 'subscribe' in action:
 446         thing = "playlist"
 447         thing_url = url_for('.playlist', playlist_id=thing_id)
 448     else:
 449         thing = "video"
 450         thing_url = url_for('.watch', v=thing_id)
 451     flash(f'''
 452         <form method=post><input type=hidden name="{undo_action}" value="{thing_id}">
 453         <a href="{thing_url}">{thing}</a> {past_action}.
 454         <label><input type="submit" hidden>
 455         <span style="text-decoration:underline;cursor:pointer">undo</span>.
 456         </label></form>''', "info")
 457
 458 @frontend.app_template_filter('format_date')
 459 def format_date(s):
 460     import datetime # can't import at top level, because it is inherited from common
 461     (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'
 462     M = '_ Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec'.split()
 463     if y == datetime.datetime.now().year:
 464         return f"{d} {M[m]}"
 465     else:
 466         return f"{M[m]} '{y%100}"
 467
 468 @frontend.app_template_filter('format_time')
 469 def format_time(i):
 470     if i is None:
 471         return None
 472     h = i // (60*60)
 473     m = i // 60 % 60
 474     s = i % 60
 475     return '%d:%02d:%02d' % (h,m,s) if h else '%02d:%02d' % (m,s)
 476
 477 @frontend.app_template_filter('timeoffset')
 478 def timeoffset(s):
 479     if s is None:
 480         return None
 481     match = re.match(r"^(\d+)s?$", s)  # e.g. 2040s
 482     if match:
 483         return match.group(1)
 484     match = re.match(r"^(?:(\d+)h)?(?:(\d+)m)?(?:(\d+)s)?$", s)  # e.g. 34m, 1h23s
 485     if match:
 486         return ":".join([n.zfill(2) for n in match.groups('0')])
 487     return None