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