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
  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 = int(request.args.get('page') or 1)
  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     }, extras=['dont_fix_spelling']*0) # extras disabled
  27
  28     if q:
  29         yt_results = fetch_searchresults(q, sp)
  30
  31         results, extras = prepare_searchresults(yt_results)
  32
  33         for extra in extras:
  34             flash(extra, 'info')
  35     else:
  36         results = None
  37
  38     return render_template('search.html.j2', rows=results, query=q, page=page)
  39
  40 # TODO: channels, playlists:
  41 # https://github.com/iv-org/invidious/blob/452d1e8307d6344dd51c5437ccd032a566291c34/src/invidious/channels.cr#L399
  42
  43 @frontend.route('/channel/<channel_id>/')
  44 @frontend.route('/channel/<channel_id>/<subpage>')
  45 def channel(channel_id, subpage="videos"):
  46     token = getattr(current_user, 'token', 'guest')
  47     if subpage == "videos":
  48         page = int(request.args.get('page', 1))
  49         sort_by = request.args.get('sort') or "newest"
  50         query = None
  51     elif subpage == "playlists":
  52         page = request.args.get('cursor')
  53         sort_by = request.args.get('sort', "modified")
  54         query = None
  55     elif subpage == "search":
  56         query = request.args.get('q')
  57         page = int(request.args.get('page', 1))
  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     result = fetch_ajax(make_channel_params(channel_id, subpage, page, sort_by, query, v3=(subpage == "videos")))
  67
  68     title, descr, thumb, rows, more = prepare_channel(result, channel_id)
  69
  70     if title is None or not rows: # if fetching from innertube failed, fall back to xmlfeed:
  71         flash("unable to fetch results from ajax; displaying fallback results (15 newest)", "error")
  72         return fallback_route(channel_id, subpage)
  73
  74     # set pin/hide stati of retrieved videos:
  75     video_ids = [card['content']['video_id'] for card in rows]
  76     pinned, hidden = fetch_video_flags(token, video_ids)
  77     rows = sorted([
  78         {'type':v['type'], 'content':{**v['content'], 'pinned': v['content']['video_id'] in pinned}}
  79         for v in rows
  80         if v['content']['video_id'] not in hidden
  81     ], key=lambda v:v['content']['pinned'], reverse=True)
  82
  83     with sqlite3.connect(cf['global']['database']) as conn:
  84         c = conn.cursor()
  85         c.execute("""
  86             SELECT COUNT(*)
  87               FROM subscriptions
  88              WHERE channel_id = ? AND user = ?
  89         """, (channel_id, token))
  90         (is_subscribed,) = c.fetchone()
  91
  92     # XXX: ad-hoc protobuf ctoken extractor: This is one big hack that needs to
  93     # get cleanded up. Since the ctoken only has fileds with rigid lengths, we
  94     # can just extract the bytes at the correct position to get at the cursor
  95     # token we need.
  96     if subpage == "playlists":
  97         page = result[1].get('response',{}).get('continuationContents',{}) \
  98             .get('sectionListContinuation',{}).get('continuations',[{}])[0] \
  99             .get('nextContinuationData',{}).get('continuation')
 100         if page:
 101             import base64
 102             page = base64.urlsafe_b64decode(page+u'===')[34:]
 103             page = base64.urlsafe_b64decode(page+b'===')[21:]
 104             page = page[:102].decode('ascii')
 105     # end XXX
 106     return render_template('channel.html.j2',
 107         title=title,
 108         subpage=subpage,
 109         rows=rows,
 110         channel_id=channel_id,
 111         channel_img=thumb,
 112         channel_desc=descr,
 113         is_subscribed=is_subscribed,
 114         page=page,
 115         has_more=more)
 116
 117 @frontend.route('/user/<user>/')
 118 @frontend.route('/user/<user>/<subpage>')
 119 @frontend.route('/c/<user>/')
 120 @frontend.route('/c/<user>/<subpage>')
 121 def channel_redirect(user, subpage=None):
 122     """
 123     The browse_ajax 'API' needs the UCID.
 124     """
 125
 126     # inverse of the test in /channel/:
 127     if re.match(r"(UC[A-Za-z0-9_-]{22})", user):
 128         return redirect(url_for('.channel', channel_id=user))
 129
 130     channel_id = canonicalize_channel(user)
 131     if not channel_id:
 132         raise NotFound("channel appears to not exist")
 133     return redirect(
 134         url_for('.channel', channel_id=channel_id, subpage=subpage), 308
 135     )
 136
 137 @frontend.route('/playlist')
 138 def playlist():
 139     #TODO: if anything goes wrong, fall back to xmlfeed
 140     playlist_id = request.args.get('list')
 141     if not playlist_id:
 142         raise BadRequest("No playlist ID")
 143     page = int(request.args.get('page', 1))
 144
 145     xmlfeed = fetch_xml("playlist_id", playlist_id)
 146     if not xmlfeed:
 147         raise NotFound("Unable to fetch playlist")
 148     title, author, _, channel_id, _ = parse_xml(xmlfeed)
 149
 150     offset = (page-1)*100 # each call returns 100 items
 151     result = fetch_ajax(make_playlist_params(playlist_id, offset))
 152
 153     if not 'continuationContents' in result[1]['response']: # XXX: this needs cleanup!
 154         # code:"CONDITION_NOT_MET", debugInfo:"list type not viewable"
 155         # on playlist https://www.youtube.com/watch?v=6y_NJg-xoeE&list=RDgohHV9ryp-A&index=24 (not openable on yt.com)
 156         error = result[1]['response']['responseContext']['errors']['error'][0]
 157         flash(f"{error['code']}: {error['debugInfo'] or error['externalErrorMessage']}", 'error')
 158         return fallback_route()
 159     rows, more = prepare_playlist(result)
 160
 161     return render_template('playlist.html.j2',
 162         title=title,
 163         author=author,
 164         channel_id=channel_id,
 165         rows=rows,
 166         page=page,
 167         has_more=more)
 168
 169 @frontend.route('/<something>', strict_slashes=False)
 170 def plain_user_or_video(something):
 171     # this is a near-copy of the same route in app/youtube, but using a
 172     # different, more reliable endpoint to determine whether a channel exists.
 173     if '.' in something:
 174         # prevent a lot of false-positives (and reduce youtube api calls)
 175         raise NotFound
 176
 177     channel_id = canonicalize_channel(something)
 178     if channel_id:
 179         return redirect(url_for('.channel', channel_id=channel_id))
 180     elif re.match(r"^[-_0-9A-Za-z]{11}$", something): # looks like a video id
 181         return redirect(url_for('youtube.watch', v=something, t=request.args.get('t')))
 182     else: # ¯\_(ツ)_/¯
 183         raise NotFound("Note: some usernames not recognized; try searching it")
 184
 185 @frontend.before_app_request
 186 def inject_button():
 187     if not 'header_items' in g:
 188         g.header_items = []
 189     g.header_items.append({
 190         'name': 'search',
 191         'url': url_for('browse.search'),
 192         'parent': frontend.name,
 193         'priority': 15,
 194     })