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     continuation = request.args.get('continuation')
  22
  23     sp = make_sp(**{
  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 continuation or q:
  35         yt_results = fetch_ajax("search", **(
  36             {'continuation': continuation} if continuation else {'query': q, 'params': sp}
  37         ))
  38
  39         results, extras, continuation = prepare_searchresults(yt_results)
  40
  41         for extra in extras:
  42             flash(extra, 'info')
  43     else:
  44         results = None
  45
  46     return render_template('search.html.j2', rows=results, query=q, continuation=continuation)
  47
  48 @frontend.route('/channel/<channel_id>/')
  49 @frontend.route('/channel/<channel_id>/<subpage>')
  50 def channel(channel_id, subpage="videos"):
  51     token = getattr(current_user, 'token', 'guest')
  52     if subpage in ("videos", "streams", "shorts"): # "streams"==livestreams
  53         sort_by = request.args.get('sort') or "newest"
  54         query = None
  55     elif subpage == "playlists":
  56         sort_by = request.args.get('sort', "modified")
  57         query = None
  58     elif subpage == "search":
  59         query = request.args.get('q')
  60         sort_by = None
  61     else: # we don't support /home, /about, ..., so redirect to /videos.
  62         return redirect(url_for('.channel', channel_id=channel_id))
  63
  64     # best effort; if it fails, it fails in the redirect.
  65     if not re.match(r"(UC[A-Za-z0-9_-]{22})", channel_id):
  66         return redirect(url_for('.channel_redirect', user=channel_id))
  67
  68     # if we don't have a continuation, we create parameters for page 1 manually:
  69     continuation = request.args.get('continuation') or \
  70         make_channel_params(channel_id, subpage, 1, sort_by, query, v3=(subpage != "search"))
  71     result = fetch_ajax("browse", continuation=continuation)
  72     error = find_and_parse_error(result)
  73
  74     if result is None: # if fetching from innertube failed, fall back to xmlfeed:
  75         flash("unable to fetch results from ajax; displaying fallback results (15 newest)", "error")
  76         return fallback_route(channel_id, subpage)
  77
  78     if error:
  79         return error, 400 # todo: ugly
  80
  81     # new seperated videos/livestreams/shorts don't return metadata
  82     xmlfeed = fetch_xml("channel_id", channel_id)
  83     if xmlfeed:
  84         title, _, _, _, _ = parse_xml(xmlfeed)
  85
  86     _, descr, thumb, rows, continuation = prepare_channel(result, channel_id, title)
  87     if not rows: # overran end of list, or is special channel (e.g. music topic (sidebar 'best of youtube', UC-9-kyTW8ZkZNDHQJ6FgpwQ)
  88         flash("ajax returned nothing; displaying fallback results (15 newest)", "error")
  89         return fallback_route(channel_id, subpage)
  90
  91
  92     # set pin/hide stati of retrieved videos:
  93     video_ids = [card['content']['video_id'] for card in rows]
  94     pinned, hidden = fetch_video_flags(token, video_ids)
  95     rows = sorted([
  96         {'type':v['type'], 'content':{**v['content'], 'pinned': v['content']['video_id'] in pinned}}
  97         for v in rows
  98         if v['content']['video_id'] not in hidden
  99     ], key=lambda v:v['content']['pinned'], reverse=True)
 100
 101     with sqlite3.connect(cf['global']['database']) as conn:
 102         c = conn.cursor()
 103         c.execute("""
 104             SELECT COUNT(*)
 105               FROM subscriptions
 106              WHERE channel_id = ? AND user = ?
 107         """, (channel_id, token))
 108         (is_subscribed,) = c.fetchone()
 109
 110     return render_template('channel.html.j2',
 111         title=title,
 112         subpage=subpage,
 113         rows=rows,
 114         channel_id=channel_id,
 115         channel_img=thumb,
 116         channel_desc=descr,
 117         is_subscribed=is_subscribed,
 118         continuation=continuation)
 119
 120 @frontend.route('/user/<user>/')
 121 @frontend.route('/user/<user>/<subpage>')
 122 @frontend.route('/c/<user>/')
 123 @frontend.route('/c/<user>/<subpage>')
 124 def channel_redirect(user, subpage=None):
 125     """
 126     The browse_ajax 'API' needs the UCID.
 127     """
 128
 129     typ = request.path.split("/")[1] # 'c' or 'user'
 130
 131     # inverse of the test in /channel/:
 132     if re.match(r"(UC[A-Za-z0-9_-]{22})", user):
 133         return redirect(url_for('.channel', channel_id=user))
 134
 135     channel_id = canonicalize_channel(user, typ)
 136     if not channel_id:
 137         raise NotFound("channel appears to not exist")
 138     return redirect(
 139         url_for('.channel', channel_id=channel_id, subpage=subpage), 308
 140     )
 141
 142 @frontend.route('/playlist')
 143 def playlist():
 144     playlist_id = request.args.get('list')
 145     if not playlist_id:
 146         raise BadRequest("No playlist ID")
 147
 148     # if we don't have a continuation, we create parameters for page 1 manually:
 149     continuation = request.args.get('continuation') or \
 150         make_playlist_params(playlist_id, 0)
 151     result = fetch_ajax("browse", continuation=continuation)
 152     error = find_and_parse_error(result)
 153
 154     if result is None:
 155         flash(f"1 {error}. Loading fallback.", 'error')
 156         return fallback_route()
 157
 158     if not 'continuationContents' in result:
 159         flash(f"2 {error}. Loading fallback.", 'error')
 160         return fallback_route()
 161
 162     title, author, channel_id, rows, continuation = prepare_playlist(result)
 163
 164     return render_template('playlist.html.j2',
 165         title=title,
 166         author=author,
 167         channel_id=channel_id,
 168         rows=rows,
 169         continuation=continuation)
 170
 171 @frontend.route('/<something>', strict_slashes=False)
 172 def plain_user_or_video(something):
 173     # this is a near-copy of the same route in app/youtube, but using a
 174     # different, more reliable endpoint to determine whether a channel exists.
 175     if '.' in something:
 176         # prevent a lot of false-positives (and reduce youtube api calls)
 177         raise NotFound
 178
 179     # possible channel names: need to distinguish /name from /@name
 180     typ = "c" if something[0] != "@" else ""
 181     channel_id = canonicalize_channel(something, typ)
 182     if channel_id:
 183         return redirect(url_for('.channel', channel_id=channel_id))
 184     elif re.match(r"^[-_0-9A-Za-z]{11}$", something): # looks like a video id
 185         return redirect(url_for('youtube.watch', v=something, t=request.args.get('t')))
 186     else: # ¯\_(ツ)_/¯
 187         raise NotFound("Note: some usernames not recognized; try searching it")
 188
 189 @frontend.before_app_request
 190 def inject_button():
 191     if not 'header_items' in g:
 192         g.header_items = []
 193     g.header_items.append({
 194         'name': 'search',
 195         'url': url_for('browse.search'),
 196         'parent': frontend.name,
 197         'priority': 15,
 198     })