share/lua/media/dailymotion.lua

   1 -- libquvi-scripts
   2 -- Copyright (C) 2010-2012  Toni Gundogdu <legatvs@gmail.com>
   3 --
   4 -- This file is part of libquvi-scripts <http://quvi.sourceforge.net/>.
   5 --
   6 -- This library is free software; you can redistribute it and/or
   7 -- modify it under the terms of the GNU Lesser General Public
   8 -- License as published by the Free Software Foundation; either
   9 -- version 2.1 of the License, or (at your option) any later version.
  10 --
  11 -- This library is distributed in the hope that it will be useful,
  12 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 -- Lesser General Public License for more details.
  15 --
  16 -- You should have received a copy of the GNU Lesser General Public
  17 -- License along with this library; if not, write to the Free Software
  18 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 -- 02110-1301  USA
  20 --
  21
  22 -- "http://dai.ly/cityofscars",
  23 -- "http://www.dailymotion.com/video/xdpig1_city-of-scars_shortfilms",
  24
  25 local Dailymotion = {} -- Utility functions unique to this script.
  26
  27 -- Identify the media script.
  28 function ident(qargs)
  29   local A = require 'quvi/accepts'
  30   local C = require 'quvi/const'
  31   local d = {"dailymotion%.%w+", "dai.ly"} -- domains
  32   local p = {"/video/", "/%w+$", "/family_filter"} -- paths
  33   local r = {
  34     accepts = A.accepts(qargs.input_url, d, p),
  35     categories = C.qmspc_http
  36   }
  37   return r
  38 end
  39
  40 -- Parse media properties.
  41 function parse(qargs)
  42   local U = require 'quvi/util'
  43   local p = Dailymotion.fetch_page(qargs, U)
  44
  45   qargs.thumb_url = p:match('"og:image" content="(.-)"') or ''
  46   qargs.title = p:match('title="(.-)"') or ''
  47   qargs.id = p:match("video/([^%?_]+)") or ''
  48
  49   qargs.streams = Dailymotion.iter_streams(p, U)
  50
  51   return qargs
  52 end
  53
  54 --
  55 -- Utility functions
  56 --
  57
  58 -- "Normalizes" the embedded URLs.
  59 function Dailymotion.normalize(input_url)
  60   if input_url:match("/swf/") then
  61     input_url = input_url:gsub("/swf/", "/")
  62   elseif input_url:match("/embed/") then
  63     input_url = input_url:gsub("/embed/", "/")
  64   end
  65   return input_url
  66 end
  67
  68 -- Fetches the page contents from the media URL.
  69 function Dailymotion.fetch_page(qargs, U)
  70   qargs.input_url = Dailymotion.normalize(qargs.input_url)
  71
  72   local s = qargs.input_url:match('[%?%&]urlback=(.+)')
  73   if s then
  74     qargs.input_url = 'http://dailymotion.com' .. U.unescape(s)
  75   end
  76
  77   local C = require 'quvi/const'
  78   local o = { [C.qfo_cookie] = 'family_filter=off' }
  79   return quvi.fetch(qargs.input_url, o)
  80 end
  81
  82 -- Iterates the available streams.
  83 function Dailymotion.iter_streams(page, U)
  84
  85   local seq = page:match('"sequence":"(.-)"')
  86                 or error('no match: sequence')
  87   seq = U.unescape(seq)
  88
  89   local urls = {}
  90   for q,u in seq:gmatch('"(%w%w)URL":"(.-)"') do
  91     table.insert(urls, {quality=q, url=Dailymotion.cleanup(U, u)})
  92   end
  93
  94   -- Each media page should have at least have this, even if other
  95   -- stream qualities are not available.
  96   if #urls ==0 then
  97     local u = seq:match('"video_url":"(.-)"')
  98                 or error('no match: media stream URL')
  99     table.insert(urls, {url=Dailymotion.cleanup(U, u)})
 100   end
 101
 102   local S = require 'quvi/stream'
 103   local r = {}
 104
 105   for _,v in pairs(urls) do
 106     local c,w,h,cn = v.url:match('(%w+)%-(%d+)x(%d+).-%.(%w+)')
 107
 108     if c then
 109       local t = S.stream_new(v.url)
 110
 111       t.video.encoding = string.lower(c or '')
 112       t.video.height = tonumber(h)
 113       t.video.width = tonumber(w)
 114       t.container = cn or ''
 115
 116       -- Must come after we have the video resolution, as the to_id
 117       -- function uses the height property.
 118       t.id = Dailymotion.to_id(t, v.quality)
 119
 120       table.insert(r, t)
 121     end
 122   end
 123
 124   if #r >1 then
 125     Dailymotion.ch_best(S, r)
 126   end
 127
 128   return r
 129 end
 130
 131 -- Sanitizes the URL.
 132 function Dailymotion.cleanup(U, u)
 133   u = U.unescape(u)
 134   u = U.slash_unescape(u)
 135   u = u:gsub('cell=secure%-vod&', '') -- http://is.gd/BzYPZJ
 136   return u
 137 end
 138
 139 -- Picks the stream with the highest video height property
 140 -- as the best in quality.
 141 function Dailymotion.ch_best(S, t)
 142   local r = t[1] -- Make the first one the 'best' by default.
 143   r.flags.best = true
 144   for _,v in pairs(t) do
 145     if v.video.height > r.video.height then
 146       r = S.swap_best(r, v)
 147     end
 148   end
 149 end
 150
 151 -- Return an ID for a stream.
 152 function Dailymotion.to_id(t, q)
 153   return string.format("%s_%s_%s_%sp",
 154     (q) and q or 'sd', t.container, t.video.encoding, t.video.height)
 155 end
 156
 157 -- vim: set ts=2 sw=2 tw=72 expandtab: