app/browse/__init__.py

   1 import requests
   2 from flask import Blueprint, render_template, request, flash, g, url_for, redirect
   3 from flask_login import current_user
   4 from werkzeug.exceptions import BadRequest, NotFound
   5
   6 from ..common.common import *
   7 from ..common.innertube import *
   8 from .lib import *
   9 from .protobuf import make_sp, make_channel_params, make_playlist_params, Filters
  10
  11 frontend = Blueprint('browse', __name__,
  12     template_folder='templates',
  13     static_folder='static',
  14     static_url_path='/static/ys')
  15
  16 @frontend.route('/results')
  17 @frontend.route('/search')
  18 def search():
  19     #token = getattr(current_user, 'token', 'guest')
  20     q = request.args.get('q') or request.args.get('search_query')
  21     page = request.args.get('page', 1, type=int)
  22
  23     sp = make_sp(page, **{
  24         k:v for k,v in request.args.items()
  25         if k in ['sort','date','type','len']
  26     }, features=[
  27         f for f in request.args.getlist('feature')
  28         if f in Filters.__dataclass_fields__.keys()
  29     ], extras=[
  30         e for e in request.args.getlist('feature')
  31         if e in ['verbatim']
  32     ])
  33
  34     if q:
  35         yt_results = fetch_searchresults(q, sp)
  36
  37         results, extras = prepare_searchresults(yt_results)
  38
  39         for extra in extras:
  40             flash(extra, 'info')
  41     else:
  42         results = None
  43
  44     return render_template('search.html.j2', rows=results, query=q, page=page)
  45
  46 @frontend.route('/channel/<channel_id>/')
  47 @frontend.route('/channel/<channel_id>/<subpage>')
  48 def channel(channel_id, subpage="videos"):
  49     token = getattr(current_user, 'token', 'guest')
  50     if subpage == "videos":
  51         sort_by = request.args.get('sort') or "newest"
  52         query = None
  53     elif subpage == "playlists":
  54         sort_by = request.args.get('sort', "modified")
  55         query = None
  56     elif subpage == "search":
  57         query = request.args.get('q')
  58         sort_by = None
  59     else: # we don't support /home, /about, ..., so redirect to /videos.
  60         return redirect(url_for('.channel', channel_id=channel_id))
  61
  62     # best effort; if it fails, it fails in the redirect.
  63     if not re.match(r"(UC[A-Za-z0-9_-]{22})", channel_id):
  64         return redirect(url_for('.channel_redirect', user=channel_id))
  65
  66     # if we don't have a continuation, we create parameters for page 1 manually:
  67     continuation = request.args.get('continuation') or \
  68         make_channel_params(channel_id, subpage, 1, sort_by, query, v3=(subpage != "search"))
  69     result = fetch_ajax(continuation)
  70     error = find_and_parse_error(result)
  71
  72     if result is None: # if fetching from innertube failed, fall back to xmlfeed:
  73         flash("unable to fetch results from ajax; displaying fallback results (15 newest)", "error")
  74         return fallback_route(channel_id, subpage)
  75
  76     if error:
  77         return error, 400 # todo: ugly
  78
  79     title, descr, thumb, rows, more = prepare_channel(result, channel_id)
  80     if not rows: # overran end of list, or is special channel (e.g. music topic)
  81         flash("ajax returned nothing; displaying fallback results (15 newest)", "error")
  82         return fallback_route(channel_id, subpage)
  83
  84     # set pin/hide stati of retrieved videos:
  85     video_ids = [card['content']['video_id'] for card in rows]
  86     pinned, hidden = fetch_video_flags(token, video_ids)
  87     rows = sorted([
  88         {'type':v['type'], 'content':{**v['content'], 'pinned': v['content']['video_id'] in pinned}}
  89         for v in rows
  90         if v['content']['video_id'] not in hidden
  91     ], key=lambda v:v['content']['pinned'], reverse=True)
  92
  93     with sqlite3.connect(cf['global']['database']) as conn:
  94         c = conn.cursor()
  95         c.execute("""
  96             SELECT COUNT(*)
  97               FROM subscriptions
  98              WHERE channel_id = ? AND user = ?
  99         """, (channel_id, token))
 100         (is_subscribed,) = c.fetchone()
 101
 102     return render_template('channel.html.j2',
 103         title=title,
 104         subpage=subpage,
 105         rows=rows,
 106         channel_id=channel_id,
 107         channel_img=thumb,
 108         channel_desc=descr,
 109         is_subscribed=is_subscribed,
 110         has_more=more)
 111
 112 @frontend.route('/user/<user>/')
 113 @frontend.route('/user/<user>/<subpage>')
 114 @frontend.route('/c/<user>/')
 115 @frontend.route('/c/<user>/<subpage>')
 116 def channel_redirect(user, subpage=None):
 117     """
 118     The browse_ajax 'API' needs the UCID.
 119     """
 120
 121     # inverse of the test in /channel/:
 122     if re.match(r"(UC[A-Za-z0-9_-]{22})", user):
 123         return redirect(url_for('.channel', channel_id=user))
 124
 125     channel_id = canonicalize_channel(user)
 126     if not channel_id:
 127         raise NotFound("channel appears to not exist")
 128     return redirect(
 129         url_for('.channel', channel_id=channel_id, subpage=subpage), 308
 130     )
 131
 132 @frontend.route('/playlist')
 133 def playlist():
 134     playlist_id = request.args.get('list')
 135     if not playlist_id:
 136         raise BadRequest("No playlist ID")
 137
 138     xmlfeed = fetch_xml("playlist_id", playlist_id)
 139     if not xmlfeed:
 140         raise NotFound("Unable to fetch playlist")
 141     title, author, _, channel_id, _ = parse_xml(xmlfeed)
 142
 143     # if we don't have a continuation, we create parameters for page 1 manually:
 144     continuation = request.args.get('continuation') or \
 145         make_playlist_params(playlist_id, 0)
 146     result = fetch_ajax(continuation)
 147     error = find_and_parse_error(result)
 148
 149     if result is None:
 150         flash(f"1 {error}. Loading fallback.", 'error')
 151         return fallback_route()
 152
 153     if not 'continuationContents' in result:
 154         flash(f"2 {error}. Loading fallback.", 'error')
 155         return fallback_route()
 156
 157     rows, more = prepare_playlist(result)
 158
 159     return render_template('playlist.html.j2',
 160         title=title,
 161         author=author,
 162         channel_id=channel_id,
 163         rows=rows,
 164         has_more=more)
 165
 166 @frontend.route('/<something>', strict_slashes=False)
 167 def plain_user_or_video(something):
 168     # this is a near-copy of the same route in app/youtube, but using a
 169     # different, more reliable endpoint to determine whether a channel exists.
 170     if '.' in something:
 171         # prevent a lot of false-positives (and reduce youtube api calls)
 172         raise NotFound
 173
 174     channel_id = canonicalize_channel(something)
 175     if channel_id:
 176         return redirect(url_for('.channel', channel_id=channel_id))
 177     elif re.match(r"^[-_0-9A-Za-z]{11}$", something): # looks like a video id
 178         return redirect(url_for('youtube.watch', v=something, t=request.args.get('t')))
 179     else: # ¯\_(ツ)_/¯
 180         raise NotFound("Note: some usernames not recognized; try searching it")
 181
 182 @frontend.before_app_request
 183 def inject_button():
 184     if not 'header_items' in g:
 185         g.header_items = []
 186     g.header_items.append({
 187         'name': 'search',
 188         'url': url_for('browse.search'),
 189         'parent': frontend.name,
 190         'priority': 15,
 191     })