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
   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 yet supported.",
  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     try:
  94         if error == 'geolocked':
  95             videoplayback = url_for('proxy.videoplayback')
  96
  97             query = urlparse(video_url).query
  98             video_url = f"{videoplayback}?{query}"
  99             for s in stream_map['adaptive']:
 100                 query = urlparse(s['url']).query
 101                 s['url'] = f"{videoplayback}?{query}"
 102             for s in stream_map['muxed']:
 103                 query = urlparse(s['url']).query
 104                 s['url'] = f"{videoplayback}?{query}"
 105
 106             error = None
 107     except: pass
 108
 109     # if the instance is blocked, try submitting a job to the anti captcha service:
 110     if error == 'banned' and cf['captcha']['api_key']:
 111         r2 = requests.get(f'https://www.youtube.com/watch?v={video_id}&hl=en&gl=US')
 112         status = submit_captcha(r2)
 113         if status is False:
 114             raise Exception("we are banned, but captcha wasn't triggered!")
 115         else:
 116             message = "right now" if status is True else f"{int(status)} seconds ago"
 117             raise BadGateway(f"""
 118                 {errdetails} An attempt at getting unblocked has been made {message}.
 119                 Please try again in 30 seconds.
 120             """)
 121
 122     show = request.args.get("show")
 123     if show == "raw":
 124         if error:
 125             msg = errdetails if error=='player' else f"{error.upper()}: {errdetails}"
 126             return f"{msg}\n\nRedirecting to Invidious.", 502, {
 127                 'Refresh': f'2; URL={invidious_url}&raw=1',
 128                 **plaintextheaders}
 129         return redirect(video_url, code=307)
 130     elif show == "json":
 131         if error and not metadata:
 132             return {'error': True, error: errdetails}, 400 # TODO: better (test _CpR4o81XQc)
 133         return jsonify(metadata)
 134     elif show == "audio":
 135         # sorting: we want to prioritize mp4a over opus, and sort by highest quality first
 136         # todo: geolocking; prefer open format?
 137         if error and not metadata:
 138             msg = errdetails if error=='player' else f"{error.upper()}: {errdetails}"
 139             return msg, 400, plaintextheaders # TODO: nicer
 140         stream = next(iter(sorted([
 141                     stream for stream in stream_map['adaptive']
 142                     if stream['mimeType'].startswith('audio/')],
 143                 key=lambda stream: ('opus' not in stream['mimeType'],
 144                     stream['bitrate']), reverse=True)
 145             ),{}).get('url')
 146         return redirect(stream)
 147     else:
 148         if error and not metadata: # e.g. malformed, private/deleted video, ...
 149             return errdetails + f"<br>Try visiting <a href='{invidious_url}'>Invidious</a>.",400 # TODO: nicer
 150         meta = prepare_metadata(metadata)
 151         with sqlite3.connect(cf['global']['database']) as conn:
 152             c = conn.cursor()
 153             c.execute("""
 154             SELECT COUNT((
 155                 SELECT 1 FROM subscriptions WHERE channel_id = ? AND user = ?
 156             )), COUNT((
 157                 SELECT 1 FROM flags WHERE video_id = ? AND display = 'pinned' AND user = ?
 158             ))""", (meta['channel_id'], token, video_id, token))
 159             (is_subscribed, is_pinned) = c.fetchone()
 160             return render_template('watch.html.j2',
 161                 video_id=video_id, video_url=video_url, stream_map=stream_map,
 162                 video_error=error, errdetails=errdetails, invidious_url=invidious_url,
 163                 is_pinned=is_pinned, is_subscribed=is_subscribed,
 164                 **meta)
 165
 166 @frontend.route('/embed/videoseries')
 167 def embed_videoseries():
 168     return redirect(url_for('.playlist', list=request.args.get('list')))
 169 @frontend.route('/embed/<video_id>')
 170 def embed(video_id):
 171     if video_id == "videoseries":
 172         return redirect(url_for('.playlist', list=request.args.get('list')))
 173
 174     return redirect(url_for('.watch', v=video_id, t=request.args.get('start')))
 175
 176 @frontend.route('/<something>', strict_slashes=False)
 177 def plain_user_or_video(something):
 178     # yt.com interprets this as a username, but we also want to catch youtu.be
 179     # short-urls. so we check if it's a channel by querying the RSS feed (this
 180     # shoudn't be rate-limited); if that fails, check if it looks like a video
 181     # id; or finally give up.
 182     if '.' not in something and channel_exists(something):
 183         # periods are not valid in usernames, vanity urls or ucids, but common
 184         # in urls that get crawled by bots (e.g. index.php). failing early
 185         # reduces the amount of invalid channel names getting looked up.
 186         return redirect(url_for('.channel', channel_id=something))
 187     elif re.match(r"^[-_0-9A-Za-z]{11}$", something): # looks like a video id
 188         return redirect(url_for('.watch', v=something, t=request.args.get('t')))
 189     else: # ¯\_(ツ)_/¯
 190         # XXX: something == 'thethoughtemporium' -> 404s
 191         raise NotFound("Note: some usernames not recognized; try searching it")
 192
 193 @frontend.route('/channel/<channel_id>/<subpage>')
 194 @frontend.route('/user/<channel_id>/<subpage>')
 195 @frontend.route('/c/<channel_id>/<subpage>')
 196 @frontend.route('/channel/<channel_id>/')
 197 @frontend.route('/user/<channel_id>/')
 198 @frontend.route('/c/<channel_id>/')
 199 def channel(channel_id, _=None):
 200     token = getattr(current_user, 'token', 'guest')
 201
 202     if re.match(r"(UC[A-Za-z0-9_-]{22})", channel_id):
 203         xmlfeed = fetch_xml("channel_id", channel_id)
 204     else:
 205         xmlfeed = fetch_xml("user", channel_id)
 206
 207     if not xmlfeed:
 208         return "not found or something", 404 # XXX
 209     title, author, videos, channel_id, _ = parse_xml(xmlfeed)
 210
 211     with sqlite3.connect(cf['global']['database']) as conn:
 212         c = conn.cursor()
 213         c.execute("""
 214             SELECT COUNT(*)
 215               FROM subscriptions
 216              WHERE channel_id = ? AND user = ?
 217         """, (channel_id, token))
 218         (is_subscribed,) = c.fetchone()
 219
 220     return render_template('xmlfeed.html.j2', title=author, rows=videos,
 221         is_subscribed=is_subscribed, channel_id=channel_id)
 222
 223 @frontend.route('/playlist')
 224 def playlist():
 225     playlist_id = request.args.get('list')
 226     if not playlist_id:
 227         return "bad list id", 400 # todo
 228
 229     xmlfeed = fetch_xml("playlist_id", playlist_id)
 230     if not xmlfeed:
 231         return "not found or something", 404 # XXX
 232     title, author, videos, _, _ = parse_xml(xmlfeed)
 233     return render_template('xmlfeed.html.j2', title=f"{title} by {author}", rows=videos)
 234
 235 @frontend.route('/api/timedtext')
 236 def timedtext():
 237     r = requests.get("https://www.youtube.com/api/timedtext", request.args.to_dict())
 238     # Note: in srv1 format, xmlentities are double-encoded m( a smart quote is
 239     # even worse: it's '&amp;39;<smartquote>' wtf!? (at least vvt seems ok)
 240     if not r.ok:
 241         return "error: {r.text}", 400 # TODO: better
 242     retval = r.text
 243     if request.args.get('fmt') == 'vtt' and request.args.get('kind') == 'asr':
 244         # autocaptions are extremely confusing, and stuck in the lower-left corner. fix it up a bit
 245         retval = re.sub(r"<.+?>", "", retval) # remove inline html-like markup that times each word/adds styles
 246         retval = retval.replace("align:start position:0%", "") # let browser position the text itself
 247         # each subtitle-line is repeated twice (first on the lower line, then
 248         # on the next "frame" on the upper line). we want to remove the
 249         # repetition, as that's confusing without word and line animations:
 250         lines = retval.split('\n')
 251         retval = '\n'.join([line for line, prev in zip(lines, ['']+lines) if not " --> " in prev])
 252     return retval, {'Content-Type': r.headers.get("Content-Type")}
 253
 254 @frontend.route('/manage/subscriptions')
 255 # disabled for guest user: @login_required
 256 def subscription_manager():
 257     if current_user.is_anonymous:
 258         token = 'guest'
 259     else:
 260         token = current_user.token
 261     with sqlite3.connect(cf['global']['database']) as conn:
 262         #with conn.cursor() as c:
 263             c = conn.cursor()
 264             c.execute("""
 265                   SELECT subscriptions.channel_id, name, type,
 266                          (subscribed_until < datetime('now')) AS obsolete
 267                     FROM subscriptions
 268                     LEFT JOIN (SELECT name, id FROM channels
 269                        UNION
 270                        SELECT name, id FROM playlists
 271                       ) AS channels ON channels.id = subscriptions.channel_id
 272                     left JOIN websub ON channels.id = websub.channel_id
 273                    WHERE user = ?
 274                      AND subscriptions.type IN ('channel', 'playlist')
 275                 ORDER BY obsolete=0, name COLLATE NOCASE ASC""", (token,))
 276             rows = [{
 277                 'channel_id': channel_id,
 278                 'author': author or channel_id,
 279                 'type': type,
 280                 'subscribed_until': subscribed_until
 281             } for (channel_id, author, type, subscribed_until) in c.fetchall()]
 282     return render_template('subscription_manager.html.j2', rows=rows)
 283
 284 @frontend.route('/feed/subscriptions', methods=['POST'])
 285 @login_required
 286 def feed_post():
 287     token = current_user.token
 288     action = next(request.form.keys(), None)
 289     if action in ['pin', 'unpin', 'hide']:
 290         video_id = request.form.get(action)
 291         display = {
 292             'pin': 'pinned',
 293             'unpin': None,
 294             'hide': 'hidden',
 295         }[action]
 296         with sqlite3.connect(cf['global']['database']) as conn:
 297             c = conn.cursor()
 298             store_video_metadata(video_id) # only needed for pinning
 299             c.execute("""
 300                 INSERT OR REPLACE INTO flags (user, video_id, display)
 301                 VALUES (?, ?, ?)
 302             """, (token, video_id, display))
 303     else:
 304         flash("unsupported action", "error")
 305     return redirect(request.url, code=303)
 306
 307 @frontend.route('/manage/subscriptions', methods=['POST'])
 308 @login_required
 309 def manage_subscriptions():
 310     token = current_user.token
 311     if 'subscribe' in request.form:
 312         some_id = request.form.get("subscribe")
 313         match = re.search(r"(UC[A-Za-z0-9_-]{22})", some_id)
 314         if match:
 315             some_id = match.group(1)
 316             id_type = "channel"
 317         else:
 318             match = re.search(r"((?:PL|LL|EC|UU|FL|UL|OL)[A-Za-z0-9_-]{10,})", some_id)
 319             if match:  # NOTE: PL-playlists are 32chars, others differ in length.
 320                 some_id = match.group(1)
 321                 id_type = "playlist"
 322             else:
 323                 flash("not a valid/subscribable URI", "error")
 324                 return redirect(request.url, code=303)
 325         with sqlite3.connect(cf['global']['database']) as conn:
 326             #with conn.cursor() as c:
 327                 c = conn.cursor()
 328                 c.execute("""
 329                         INSERT OR IGNORE INTO subscriptions (user, channel_id, type)
 330                         VALUES (?, ?, ?)
 331                 """, (token, some_id, id_type))
 332                 # TODO: sql-error-handling, asynchronically calling update-subs.pl
 333
 334     elif 'unsubscribe' in request.form:
 335         some_id = request.form.get("unsubscribe")
 336         with sqlite3.connect(cf['global']['database']) as conn:
 337             #with conn.cursor() as c:
 338                 c = conn.cursor()
 339                 c.execute("""
 340                         DELETE FROM subscriptions
 341                         WHERE user = ? AND channel_id = ?
 342                 """, (token, some_id))
 343                 # TODO: sql-error-handling, report success
 344
 345     else:
 346         flash("unsupported action", "error")
 347
 348     return redirect(request.url, code=303)
 349
 350 def get_cipher():
 351     # reload cipher from database every 1 hour
 352     if 'cipher' not in g or time.time() - g.get('cipher_updated', 0) > 1 * 60 * 60:
 353         with sqlite3.connect(cf['global']['database']) as conn:
 354             c = conn.cursor()
 355             c.execute("SELECT sts, algorithm FROM cipher")
 356             g.cipher = c.fetchone()
 357             g.cipher_updated = time.time()
 358
 359     return g.cipher
 360
 361 #@frontend.teardown_appcontext
 362 #def teardown_db():
 363 #    db = g.pop('db', None)
 364 #
 365 #    if db is not None:
 366 #        db.close()
 367
 368
 369 @frontend.app_template_filter('format_date')
 370 def format_date(s):
 371     import datetime # can't import at top level, because it is inherited from common
 372     (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'
 373     M = '_ Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec'.split()
 374     if y == datetime.datetime.now().year:
 375         return f"{d} {M[m]}"
 376     else:
 377         return f"{M[m]} '{y%100}"
 378
 379 @frontend.app_template_filter('format_time')
 380 def format_time(i):
 381     if i is None:
 382         return None
 383     h = i // (60*60)
 384     m = i // 60 % 60
 385     s = i % 60
 386     return '%d:%02d:%02d' % (h,m,s) if h else '%02d:%02d' % (m,s)
 387
 388 @frontend.app_template_filter('timeoffset')
 389 def timeoffset(s):
 390     if s is None:
 391         return None
 392     match = re.match(r"^(\d+)s?$", s)  # e.g. 2040s
 393     if match:
 394         return match.group(1)
 395     match = re.match(r"^(?:(\d+)h)?(?:(\d+)m)?(?:(\d+)s)?$", s)  # e.g. 34m, 1h23s
 396     if match:
 397         return ":".join([n.zfill(2) for n in match.groups('0')])
 398     return None