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     else:
  26         token = current_user.token
  27     page = int(request.args.get('page', 0))
  28     with sqlite3.connect(cf['global']['database']) as conn:
  29         c = conn.cursor()
  30         c.execute("""
  31            SELECT videos.id, channel_id, name, title, published, flags.display
  32              FROM videos
  33              JOIN channels ON videos.channel_id = channels.id
  34         LEFT JOIN flags ON (videos.id = flags.video_id) AND (flags.user = ?)
  35             WHERE channel_id IN
  36                   (SELECT channel_id FROM subscriptions WHERE user = ?)
  37                   AND flags.display IS NOT 'hidden'
  38          ORDER BY (display = 'pinned') DESC, crawled DESC
  39             LIMIT 36
  40            OFFSET 36*?""", (token, token, page))
  41         rows = [{
  42             'video_id': video_id,
  43             'channel_id': channel_id,
  44             'author': author,
  45             'title': title,
  46             'published': published,
  47             'pinned': display == 'pinned',
  48         } for (video_id, channel_id, author, title, published, display) in c.fetchall()]
  49     return render_template('index.html.j2', rows=rows, page=page)
  50
  51 @frontend.route('/watch')
  52 def watch():
  53     if not 'v' in request.args:
  54         return "missing video id", 400
  55
  56     plaintextheaders = {
  57         'content-type': 'text/plain',
  58         'Link': "<data:text/css,body%7Bcolor:%23eee;background:%23333%7D>; rel=stylesheet;"
  59     }
  60
  61     video_id = request.args.get('v')
  62     sts, algo = get_cipher()
  63     video_url, metadata, error, errdetails = get_video_info(video_id, sts, algo)
  64
  65     extra = {'geolocked':'local=1', 'livestream':'raw=0'}.get(error,'')
  66     invidious_url = f"https://invidio.us/watch?v={video_id}&{extra}&raw=1"
  67     errdetails = {
  68         'malformed':  "Video ID is invalid.",
  69         'geolocked':  "This video is geolocked.",
  70         'livestream': "Livestreams not yet supported.",
  71         'exhausted':  errdetails or "Couldn't extract video URLs.",
  72         'player':     errdetails,
  73     }.get(error)
  74
  75     show = request.args.get("show")
  76     if show == "raw":
  77         if error:
  78             msg = errdetails if error=='player' else f"{error.upper()}: {errdetails}"
  79             return f"{msg}\n\nRedirecting to Invidious.", 502, {
  80                 'Refresh': f'2; URL={invidious_url}',
  81                 **plaintextheaders}
  82         return redirect(video_url, code=307)
  83     elif show == "json":
  84         if error and not metadata:
  85             return {'error': True, error: errdetails}, 400 # TODO: better (test _CpR4o81XQc)
  86         return jsonify(metadata)
  87     else:
  88         if error and not metadata: # e.g. malformed, private/deleted video, ...
  89             return errdetails,400 # TODO: nicer
  90         return render_template('watch.html.j2',
  91             video_id=video_id, video_url=video_url,
  92             video_error=error, errdetails=errdetails, invidious_url=invidious_url,
  93             **prepare_metadata(metadata))
  94
  95 @frontend.route('/channel/<channel_id>')
  96 def channel(channel_id):
  97     if not re.match(r"(UC[A-Za-z0-9_-]{22})", channel_id):
  98         return "bad channel id", 400 # todo
  99
 100     xmlfeed = fetch_xml("channel_id", channel_id)
 101     if not xmlfeed:
 102         return "not found or something", 404 # XXX
 103     title, author, videos = parse_xml(xmlfeed)
 104     return render_template('xmlfeed.html.j2', title=author, rows=videos)
 105
 106 @frontend.route('/playlist')
 107 def playlist():
 108     playlist_id = request.args.get('list')
 109     if not playlist_id:
 110         return "bad list id", 400 # todo
 111
 112     xmlfeed = fetch_xml("playlist_id", playlist_id)
 113     if not xmlfeed:
 114         return "not found or something", 404 # XXX
 115     title, author, videos = parse_xml(xmlfeed)
 116     return render_template('xmlfeed.html.j2', title=f"{title} by {author}", rows=videos)
 117
 118 @frontend.route('/manage/subscriptions')
 119 # disabled for guest user: @login_required
 120 def subscription_manager():
 121     if current_user.is_anonymous:
 122         token = 'guest'
 123     else:
 124         token = current_user.token
 125     with sqlite3.connect(cf['global']['database']) as conn:
 126         #with conn.cursor() as c:
 127             c = conn.cursor()
 128             c.execute("""
 129                   SELECT subscriptions.channel_id, name,
 130                          (subscribed_until < datetime('now')) AS obsolete
 131                     FROM subscriptions
 132                     left JOIN channels ON channels.id = subscriptions.channel_id
 133                     left JOIN websub ON channels.id = websub.channel_id
 134                    WHERE user = ?
 135                      AND subscriptions.type IN ('channel', 'playlist')
 136                 ORDER BY obsolete=0, name COLLATE NOCASE ASC""", (token,))
 137             rows = [{
 138                 'channel_id': channel_id,
 139                 'author': author or channel_id,
 140                 'subscribed_until': subscribed_until
 141             } for (channel_id, author, subscribed_until) in c.fetchall()]
 142     return render_template('subscription_manager.html.j2', rows=rows)
 143
 144 @frontend.route('/feed/subscriptions', methods=['POST'])
 145 @login_required
 146 def feed_post():
 147     token = current_user.token
 148     action = next(request.form.keys(), None)
 149     if action in ['pin', 'unpin', 'hide']:
 150         video_id = request.form.get(action)
 151         display = {
 152             'pin': 'pinned',
 153             'unpin': None,
 154             'hide': 'hidden',
 155         }[action]
 156         with sqlite3.connect(cf['global']['database']) as conn:
 157             #with conn.cursor() as c:
 158                 c = conn.cursor()
 159                 c.execute("""
 160                         INSERT OR REPLACE INTO flags (user, video_id, display)
 161                         VALUES (?, ?, ?)
 162                 """, (token, video_id, display))
 163     else:
 164         flash("unsupported action", "error")
 165     return redirect(request.url, code=303)
 166
 167 @frontend.route('/manage/subscriptions', methods=['POST'])
 168 @login_required
 169 def manage_subscriptions():
 170     token = current_user.token
 171     if 'subscribe' in request.form:
 172         channel_id = request.form.get("subscribe")
 173         match = re.search(r"(UC[A-Za-z0-9_-]{22})", channel_id)
 174         if match:
 175             channel_id = match.group(1)
 176         else:
 177             match = re.search(r"((?:PL|LL|EC|UU|FL|UL|OL)[A-Za-z0-9_-]{10,})", channel_id)
 178             if match:  # NOTE: PL-playlists are 32chars, others differ in length.
 179                 flash("playlists not (yet?) supported.", "error")
 180                 return redirect(request.url, code=303) # TODO: dedup redirection
 181             else:
 182                 flash("not a valid/subscribable URI", "error")
 183                 return redirect(request.url, code=303) # TODO: dedup redirection
 184         with sqlite3.connect(cf['global']['database']) as conn:
 185             #with conn.cursor() as c:
 186                 c = conn.cursor()
 187                 c.execute("""
 188                         INSERT OR IGNORE INTO subscriptions (user, channel_id)
 189                         VALUES (?, ?)
 190                 """, (token, channel_id))
 191                 # TODO: sql-error-handling, asynchronically calling update-subs.pl
 192
 193     elif 'unsubscribe' in request.form:
 194         channel_id = request.form.get("unsubscribe")
 195         with sqlite3.connect(cf['global']['database']) as conn:
 196             #with conn.cursor() as c:
 197                 c = conn.cursor()
 198                 c.execute("""
 199                         DELETE FROM subscriptions
 200                         WHERE user = ? AND channel_id = ?
 201                 """, (token, channel_id))
 202                 # TODO: sql-error-handling, report success
 203
 204     else:
 205         flash("unsupported action", "error")
 206
 207     return redirect(request.url, code=303)
 208
 209 @frontend.route('/r/')
 210 def reddit_index():
 211     return ""
 212 @frontend.route('/r/<subreddit>')
 213 def reddit(subreddit="videos"):
 214     count = int(request.args.get('count', 0))
 215     before = request.args.get('before')
 216     after = request.args.get('after')
 217     query = '&'.join([f"{k}={v}" for k,v in [('count',count), ('before',before), ('after',after)] if v])
 218     r = requests.get(f"https://old.reddit.com/r/{subreddit}.json?{query}", headers={'User-Agent':'Mozilla/5.0'})
 219     if not r.ok or not 'data' in r.json():
 220         return r.text+"error retrieving reddit data", 502
 221
 222     good = [e for e in r.json()['data']['children'] if e['data']['score'] > 1]
 223     bad  = [e for e in r.json()['data']['children'] if e['data']['score'] <=1]
 224     videos = []
 225     for entry in (good+bad):
 226         e = entry['data']
 227         if e['domain'] not in ['youtube.com', 'youtu.be', 'invidio.us']:
 228             continue
 229         video_id = re.match(r'^https?://(?:www.|m.)?(?:youtube.com/watch\?(?:.*&amp;)?v=|youtu.be/|youtube.com/embed/)([-_0-9A-Za-z]+)', e['url']).group(1)
 230         if not video_id: continue
 231         videos.append({
 232             'video_id': video_id,
 233             'title': e['title'],
 234             'url': e['permalink'],
 235             'n_comments': e['num_comments'],
 236             'n_karma': e['score'],
 237         })
 238     before = r.json()['data']['before']
 239     after = r.json()['data']['after']
 240     return render_template('reddit.html.j2', subreddit=subreddit, rows=videos, before=before, after=after, count=count)
 241
 242 def get_cipher():
 243     # reload cipher from database every 1 hour
 244     if 'cipher' not in g or time.time() - g.get('cipher_updated', 0) > 1 * 60 * 60:
 245         with sqlite3.connect(cf['global']['database']) as conn:
 246             c = conn.cursor()
 247             c.execute("SELECT sts, algorithm FROM cipher")
 248             g.cipher = c.fetchone()
 249             g.cipher_updated = time.time()
 250
 251     return g.cipher
 252
 253 #@frontend.teardown_appcontext
 254 #def teardown_db():
 255 #    db = g.pop('db', None)
 256 #
 257 #    if db is not None:
 258 #        db.close()
 259
 260
 261 @frontend.app_template_filter('format_date')
 262 def format_date(s):
 263     (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'
 264     M = '_ Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec'.split()
 265     return f"{d} {M[m]}"