share/lua/media/arte.lua

   1 -- libquvi-scripts
   2 -- Copyright (C) 2012  Toni Gundogdu <legatvs@gmail.com>
   3 -- Copyright (C) 2011  Raphaël Droz <raphael.droz+floss@gmail.com>
   4 --
   5 -- This file is part of libquvi-scripts <http://quvi.googlecode.com/>.
   6 --
   7 -- This library is free software; you can redistribute it and/or
   8 -- modify it under the terms of the GNU Lesser General Public
   9 -- License as published by the Free Software Foundation; either
  10 -- version 2.1 of the License, or (at your option) any later version.
  11 --
  12 -- This library is distributed in the hope that it will be useful,
  13 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 -- Lesser General Public License for more details.
  16 --
  17 -- You should have received a copy of the GNU Lesser General Public
  18 -- License along with this library; if not, write to the Free Software
  19 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20 -- 02110-1301  USA
  21
  22 -- NOTE: Most videos expire some (7?) days after their original broadcast
  23
  24 local Arte = {} -- Utility functions unique to to this script.
  25
  26 -- Identify the media script.
  27 function ident(qargs)
  28   local A = require 'quvi/accepts'
  29   local C = require 'quvi/const'
  30   local r = {
  31     accepts = A.accepts(qargs.input_url,
  32                           {"videos%.arte%.tv"}, {"/%w+/videos/"}),
  33     categories = C.proto_rtmp
  34   }
  35   return r
  36 end
  37
  38 -- Parse media URL.
  39 function parse(self)
  40     self.host_id  = 'arte'
  41     local config  = Arte.get_config(self)
  42     local U       = require 'quvi/util'
  43     local formats = Arte.iter_formats(config, U)
  44     local format  = U.choose_format(self, formats,
  45                                     Arte.choose_best,
  46                                     Arte.choose_default,
  47                                     Arte.to_s)
  48                         or error("unable to choose format")
  49     self.title         = format.title or error('no match: title')
  50     self.id            = format.id or error('no match: id')
  51     self.thumbnail_url = format.thumb or ''
  52     self.url           = {format.url or error("no match: media url")}
  53
  54     return self
  55 end
  56
  57 --
  58 -- Utility functions
  59 --
  60
  61 function Arte.get_config(self)
  62     local p = quvi.fetch(self.page_url)
  63
  64     local c_url = p:match('videorefFileUrl = "(.-)"')
  65                     or error('no match: config URL')
  66
  67     return Arte.get_lang_config(quvi.fetch(c_url, {fetch_type='config'}))
  68 end
  69
  70 function Arte.get_lang_config(config)
  71     local t = {}
  72     for lang,url in config:gmatch('<video lang="(%w+)" ref="(.-)"') do
  73         table.insert(t, {lang=lang,
  74                          config=quvi.fetch(url, {fetch_type = 'config'})})
  75     end
  76     return t
  77 end
  78
  79 function Arte.iter_lang_formats(lang_config, t, U)
  80
  81     local p = '<video id="(%d+)" lang="(%w+)"'
  82            .. '.-<name>(.-)<'
  83            .. '.-<firstThumbnailUrl>(.-)<'
  84            .. '.-<dateExpiration>(.-)<'
  85            .. '.-<dateVideo>(.-)<'
  86
  87     local config = lang_config.config
  88
  89     local id,lang,title,thumb,exp,date = config:match(p)
  90     if not id then error("no match: media id, etc.") end
  91
  92     if lang ~= lang_config.lang then
  93         error("no match: lang")
  94     end
  95
  96     if Arte.has_expired(exp, U) then
  97         error('error: media no longer available (expired)')
  98     end
  99
 100     local urls = config:match('<urls>(.-)</urls>')
 101                   or error('no match: urls')
 102
 103     for q,u in urls:gmatch('<url quality="(%w+)">(.-)<') do
 104 --        print(q,u)
 105         table.insert(t, {lang=lang,   quality=q,   url=u,
 106                          thumb=thumb, title=title, id=id})
 107     end
 108 end
 109
 110 function Arte.iter_formats(config, U)
 111     local t = {}
 112     for _,v in pairs(config) do
 113         Arte.iter_lang_formats(v, t, U)
 114     end
 115     return t
 116 end
 117
 118 function Arte.has_expired(s, U)
 119     return U.to_timestamp(s) - os.time() < 0
 120 end
 121
 122 function Arte.choose_best(formats) -- Whatever matches 'hd' first
 123     local r
 124     for _,v in pairs(formats) do
 125         if Arte.to_s(v):match('hd') then
 126             return v
 127         end
 128     end
 129     return r
 130 end
 131
 132 function Arte.choose_default(formats) -- Whatever matches 'sd' first
 133     local r
 134     for _,v in pairs(formats) do
 135         if Arte.to_s(v):match('sd') then
 136             return v
 137         end
 138     end
 139     return r
 140 end
 141
 142 function Arte.to_s(t)
 143     return string.format("%s_%s", t.quality, t.lang)
 144 end
 145
 146 -- vim: set ts=4 sw=4 tw=72 expandtab: