app/browse/protobuf.py

   1 import base64
   2 from . import pyproto
   3
   4 def proto(d, padding=False):
   5     return base64.urlsafe_b64encode(pyproto.ProtoBuf(d).toBuf()) \
   6             .decode('ascii').replace("=", "%3D" if padding else "")
   7
   8 def continuation(subject, params, query=None):
   9     return proto({
  10         80226972: {
  11             2: subject,
  12             3: proto(params, padding=True),
  13             11: query,
  14         }
  15     }, padding=True)
  16
  17 def make_sp(sort=None, date=None, type=None, len=None, features=[], extras=[]):
  18     sortorder  = dict(relevance=0, rating=1, date=2, views=3)
  19     datefilter = dict(hour=1, day=2, week=3, month=4, year=5)
  20     typefilter = dict(video=1, channel=2, playlist=3, movie=4, show=5)
  21     lenfilter  = dict(short=1, long=2, medium=3) # short=0-4min, long=20+min, medium=4-20min
  22     extraflags = dict(verbatim=1)
  23     featureflags = dict(is_hd=4, subtitles=5, ccommons=6, is_3d=7, live=8,
  24                     purchased=9, is_4k=14, is_360=15, location=23, is_hdr=25)
  25
  26     return proto({
  27         1: sortorder.get(sort),
  28         2: {
  29             1: datefilter.get(date),
  30             2: typefilter.get(type),
  31             3: lenfilter.get(len),
  32             **{featureflags[k]:True for k in features if k in featureflags}
  33         } if date or type or len or features else None,
  34         8: { extraflags[k]:True for k in extras if k in extraflags } or None
  35     }, padding=True)
  36
  37 def make_channel_params(subject, typ="videos", sort=None, query=None):
  38     if typ in ("playlists",):
  39         sortorder = dict(newest=3, modified=4)
  40         return continuation(subject, {
  41             2: "playlists", #type_s
  42             4: 1, #type_i
  43             3: sortorder.get(sort),#sort optional
  44             7: 1, #unknown_const1
  45             23: 0, #unknown_const2
  46             6: 2, #list_or_grid (2=list, None/1=grid)
  47             61: proto({1: proto({1: 0})}) #offset
  48         })
  49     elif typ in ("search",):
  50         return continuation(subject, {
  51             2: "search",#type_s
  52             7: 1, #unknown_const1
  53             23: 0, #unknown_const2
  54             6: 2, #list_or_grid (2=list, None/1=grid)
  55         }, query)
  56     elif typ in ("videos", "streams", "shorts"):
  57         sortorder = dict(newest=1, popular=2)
  58         typekey = dict(videos=15, streams=14, shorts=10)
  59         return continuation(subject, { 110: { 3: {
  60             typekey[typ]: {
  61                 2: { 1: "00000000-0000-0000-0000-000000000000" },
  62                 3: sortorder.get(sort,1)
  63             }
  64         }}})
  65     else:
  66         raise NotImplementedError
  67
  68 def make_playlist_params(playlist_id, offset):
  69     # mix takes video id instead of offset. an id not in the playlist requests the beginning.
  70     mix_playlist = playlist_id.startswith("RD")
  71     return continuation("VL" + playlist_id, {
  72         15: "PT:" + proto(
  73             { 2: '___________' } if mix_playlist else { 1: offset }
  74         )
  75     })