app/youtube/__init__.py

   1 import re
   2 import time
   3 import sqlite3
   4 import requests
   5 #from flask_login import current_user, login_required
   6 from flask_login import LoginManager, UserMixin, current_user, login_user, logout_user, login_required
   7 from flask import Blueprint, render_template, request, redirect, flash, url_for, jsonify, g
   8
   9 from ..common.common import *
  10
  11 frontend = Blueprint('youtube', __name__,
  12     template_folder='templates',
  13     static_folder='static',
  14     static_url_path='/static/yt')
  15
  16 @frontend.route('/')
  17 def index():
  18     return redirect(url_for('.feed'), code=302)
  19
  20 @frontend.route('/feed/subscriptions')
  21 # disabled for guest user: @login_required
  22 def feed():
  23     if current_user.is_anonymous:
  24         token = 'guest'
  25         if 'welcome_message' in cf['frontend']:
  26             flash(cf['frontend']['welcome_message'], "info")
  27     else:
  28         token = current_user.token
  29     page = int(request.args.get('page', 0))
  30     with sqlite3.connect(cf['global']['database']) as conn:
  31         c = conn.cursor()
  32         c.execute("""
  33            SELECT videos.id, channel_id, name, title, published, flags.display
  34              FROM videos
  35              JOIN channels ON videos.channel_id = channels.id
  36         LEFT JOIN flags ON (videos.id = flags.video_id) AND (flags.user = ?)
  37             WHERE (channel_id IN (SELECT channel_id FROM subscriptions WHERE user=?)
  38                    OR flags.display = 'pinned')
  39                   AND flags.display IS NOT 'hidden'
  40          ORDER BY (display = 'pinned') DESC, crawled DESC
  41             LIMIT 36
  42            OFFSET 36*?""", (token, token, page))
  43         rows = [{
  44             'video_id': video_id,
  45             'channel_id': channel_id,
  46             'author': author,
  47             'title': title,
  48             'published': published,
  49             'pinned': display == 'pinned',
  50         } for (video_id, channel_id, author, title, published, display) in c.fetchall()]
  51     return render_template('index.html.j2', rows=rows, page=page)
  52
  53 @frontend.route('/watch')
  54 def watch():
  55     if current_user.is_anonymous:
  56         token = 'guest'
  57     else:
  58         token = current_user.token
  59
  60     if not 'v' in request.args:
  61         return "missing video id", 400
  62
  63     plaintextheaders = {
  64         'content-type': 'text/plain',
  65         'Link': "<data:text/css,body%7Bcolor:%23eee;background:%23333%7D>; rel=stylesheet;"
  66     }
  67
  68     video_id = request.args.get('v')
  69     sts, algo = get_cipher()
  70     video_url, metadata, error, errdetails = get_video_info(video_id, sts, algo)
  71
  72     extra = {'geolocked':'local=1', 'livestream':'raw=0'}.get(error,'')
  73     invidious_url = f"https://invidio.us/watch?v={video_id}&{extra}&raw=1"
  74     errdetails = {
  75         'malformed':  "Video ID is invalid.",
  76         'geolocked':  "This video is geolocked.",
  77         'livestream': "Livestreams not yet supported.",
  78         'exhausted':  errdetails or "Couldn't extract video URLs.",
  79         'player':     errdetails,
  80     }.get(error)
  81
  82     show = request.args.get("show")
  83     if show == "raw":
  84         if error:
  85             msg = errdetails if error=='player' else f"{error.upper()}: {errdetails}"
  86             return f"{msg}\n\nRedirecting to Invidious.", 502, {
  87                 'Refresh': f'2; URL={invidious_url}',
  88                 **plaintextheaders}
  89         return redirect(video_url, code=307)
  90     elif show == "json":
  91         if error and not metadata:
  92             return {'error': True, error: errdetails}, 400 # TODO: better (test _CpR4o81XQc)
  93         return jsonify(metadata)
  94     else:
  95         if error and not metadata: # e.g. malformed, private/deleted video, ...
  96             return errdetails,400 # TODO: nicer
  97         meta = prepare_metadata(metadata)
  98         with sqlite3.connect(cf['global']['database']) as conn:
  99             c = conn.cursor()
 100             c.execute("""
 101             SELECT COUNT((
 102                 SELECT 1 FROM subscriptions WHERE channel_id = ? AND user = ?
 103             )), COUNT((
 104                 SELECT 1 FROM flags WHERE video_id = ? AND display = 'pinned' AND user = ?
 105             ))""", (meta['channel_id'], token, video_id, token))
 106             (is_subscribed, is_pinned) = c.fetchone()
 107             return render_template('watch.html.j2',
 108                 video_id=video_id, video_url=video_url,
 109                 video_error=error, errdetails=errdetails, invidious_url=invidious_url,
 110                 is_pinned=is_pinned, is_subscribed=is_subscribed,
 111                 **meta)
 112
 113 @frontend.route('/embed/<video_id>')
 114 def embed(video_id):
 115     return redirect(url_for('youtube.watch', v=video_id))
 116
 117 @frontend.route('/channel/<channel_id>')
 118 def channel(channel_id):
 119     token = getattr(current_user, 'token', 'guest')
 120
 121     if not re.match(r"(UC[A-Za-z0-9_-]{22})", channel_id):
 122         return "bad channel id", 400 # todo
 123
 124     xmlfeed = fetch_xml("channel_id", channel_id)
 125     if not xmlfeed:
 126         return "not found or something", 404 # XXX
 127     title, author, videos = parse_xml(xmlfeed)
 128
 129     with sqlite3.connect(cf['global']['database']) as conn:
 130         c = conn.cursor()
 131         c.execute("""
 132             SELECT COUNT(*)
 133               FROM subscriptions
 134              WHERE channel_id = ? AND user = ?
 135         """, (channel_id, token))
 136         (is_subscribed,) = c.fetchone()
 137
 138     return render_template('xmlfeed.html.j2', title=author, rows=videos,
 139         is_subscribed=is_subscribed, channel_id=channel_id)
 140
 141 @frontend.route('/playlist')
 142 def playlist():
 143     playlist_id = request.args.get('list')
 144     if not playlist_id:
 145         return "bad list id", 400 # todo
 146
 147     xmlfeed = fetch_xml("playlist_id", playlist_id)
 148     if not xmlfeed:
 149         return "not found or something", 404 # XXX
 150     title, author, videos = parse_xml(xmlfeed)
 151     return render_template('xmlfeed.html.j2', title=f"{title} by {author}", rows=videos)
 152
 153 @frontend.route('/api/timedtext')
 154 def timedtext():
 155     r = requests.get("https://www.youtube.com/api/timedtext", request.args.to_dict())
 156     # Note: in srv1 format, xmlentities are double-encoded m( a smart quote is
 157     # even worse: it's '&amp;39;<smartquote>' wtf!? (at least vvt seems ok)
 158     if not r.ok:
 159         return "error: {r.text}", 400 # TODO: better
 160     retval = r.text
 161     if request.args.get('fmt') == 'vtt' and request.args.get('kind') == 'asr':
 162         # autocaptions are extremely confusing, and stuck in the lower-left corner. fix it up a bit
 163         retval = re.sub(r"<.+?>", "", retval) # remove inline html-like markup that times each word/adds styles
 164         retval = retval.replace("align:start position:0%", "") # let browser position the text itself
 165         # each subtitle-line is repeated twice (first on the lower line, then
 166         # on the next "frame" on the upper line). we want to remove the
 167         # repetition, as that's confusing without word and line animations:
 168         lines = retval.split('\n')
 169         retval = '\n'.join([line for line, prev in zip(lines, ['']+lines) if not " --> " in prev])
 170     return retval, {'Content-Type': r.headers.get("Content-Type")}
 171
 172 @frontend.route('/manage/subscriptions')
 173 # disabled for guest user: @login_required
 174 def subscription_manager():
 175     if current_user.is_anonymous:
 176         token = 'guest'
 177     else:
 178         token = current_user.token
 179     with sqlite3.connect(cf['global']['database']) as conn:
 180         #with conn.cursor() as c:
 181             c = conn.cursor()
 182             c.execute("""
 183                   SELECT subscriptions.channel_id, name,
 184                          (subscribed_until < datetime('now')) AS obsolete
 185                     FROM subscriptions
 186                     left JOIN channels ON channels.id = subscriptions.channel_id
 187                     left JOIN websub ON channels.id = websub.channel_id
 188                    WHERE user = ?
 189                      AND subscriptions.type IN ('channel', 'playlist')
 190                 ORDER BY obsolete=0, name COLLATE NOCASE ASC""", (token,))
 191             rows = [{
 192                 'channel_id': channel_id,
 193                 'author': author or channel_id,
 194                 'subscribed_until': subscribed_until
 195             } for (channel_id, author, subscribed_until) in c.fetchall()]
 196     return render_template('subscription_manager.html.j2', rows=rows)
 197
 198 @frontend.route('/feed/subscriptions', methods=['POST'])
 199 @login_required
 200 def feed_post():
 201     token = current_user.token
 202     action = next(request.form.keys(), None)
 203     if action in ['pin', 'unpin', 'hide']:
 204         video_id = request.form.get(action)
 205         display = {
 206             'pin': 'pinned',
 207             'unpin': None,
 208             'hide': 'hidden',
 209         }[action]
 210         with sqlite3.connect(cf['global']['database']) as conn:
 211             c = conn.cursor()
 212             store_video_metadata(video_id) # only needed for pinning
 213             c.execute("""
 214                 INSERT OR REPLACE INTO flags (user, video_id, display)
 215                 VALUES (?, ?, ?)
 216             """, (token, video_id, display))
 217     else:
 218         flash("unsupported action", "error")
 219     return redirect(request.url, code=303)
 220
 221 @frontend.route('/manage/subscriptions', methods=['POST'])
 222 @login_required
 223 def manage_subscriptions():
 224     token = current_user.token
 225     if 'subscribe' in request.form:
 226         channel_id = request.form.get("subscribe")
 227         match = re.search(r"(UC[A-Za-z0-9_-]{22})", channel_id)
 228         if match:
 229             channel_id = match.group(1)
 230         else:
 231             match = re.search(r"((?:PL|LL|EC|UU|FL|UL|OL)[A-Za-z0-9_-]{10,})", channel_id)
 232             if match:  # NOTE: PL-playlists are 32chars, others differ in length.
 233                 flash("playlists not (yet?) supported.", "error")
 234                 return redirect(request.url, code=303) # TODO: dedup redirection
 235             else:
 236                 flash("not a valid/subscribable URI", "error")
 237                 return redirect(request.url, code=303) # TODO: dedup redirection
 238         with sqlite3.connect(cf['global']['database']) as conn:
 239             #with conn.cursor() as c:
 240                 c = conn.cursor()
 241                 c.execute("""
 242                         INSERT OR IGNORE INTO subscriptions (user, channel_id)
 243                         VALUES (?, ?)
 244                 """, (token, channel_id))
 245                 # TODO: sql-error-handling, asynchronically calling update-subs.pl
 246
 247     elif 'unsubscribe' in request.form:
 248         channel_id = request.form.get("unsubscribe")
 249         with sqlite3.connect(cf['global']['database']) as conn:
 250             #with conn.cursor() as c:
 251                 c = conn.cursor()
 252                 c.execute("""
 253                         DELETE FROM subscriptions
 254                         WHERE user = ? AND channel_id = ?
 255                 """, (token, channel_id))
 256                 # TODO: sql-error-handling, report success
 257
 258     else:
 259         flash("unsupported action", "error")
 260
 261     return redirect(request.url, code=303)
 262
 263 def get_cipher():
 264     # reload cipher from database every 1 hour
 265     if 'cipher' not in g or time.time() - g.get('cipher_updated', 0) > 1 * 60 * 60:
 266         with sqlite3.connect(cf['global']['database']) as conn:
 267             c = conn.cursor()
 268             c.execute("SELECT sts, algorithm FROM cipher")
 269             g.cipher = c.fetchone()
 270             g.cipher_updated = time.time()
 271
 272     return g.cipher
 273
 274 #@frontend.teardown_appcontext
 275 #def teardown_db():
 276 #    db = g.pop('db', None)
 277 #
 278 #    if db is not None:
 279 #        db.close()
 280
 281
 282 @frontend.app_template_filter('format_date')
 283 def format_date(s):
 284     (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'
 285     M = '_ Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec'.split()
 286     return f"{d} {M[m]}"