share/lua/website/spiegel.lua

   1
   2 -- libquvi-scripts
   3 -- Copyright (C) 2010-2011  Toni Gundogdu <legatvs@gmail.com>
   4 --
   5 -- This file is part of libquvi-scripts <http://quvi.sourceforge.net/>.
   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
  23 --
  24 -- NOTE: mp4s do not appear to be available (404) even if listed.
  25 --
  26
  27 local Spiegel = {} -- Utility functions unique to this script
  28
  29 -- Identify the script.
  30 function ident(self)
  31     package.path = self.script_dir .. '/?.lua'
  32     local C      = require 'quvi/const'
  33     local r      = {}
  34     r.domain     = "spiegel%.de"
  35     r.formats    = "default|best"
  36     r.categories = C.proto_http
  37     local U      = require 'quvi/util'
  38     r.handles    = U.handles(self.page_url, {r.domain}, {"/video/"})
  39     return r
  40 end
  41
  42 -- Query available formats.
  43 function query_formats(self)
  44     Spiegel.get_media_id(self)
  45
  46     local config  = Spiegel.get_config(self)
  47     local formats = Spiegel.iter_formats(config)
  48
  49     local t = {}
  50     for _,v in pairs(formats) do
  51         table.insert(t, Spiegel.to_s(v))
  52     end
  53
  54     table.sort(t)
  55     self.formats = table.concat(t, "¦")
  56
  57     return self
  58 end
  59
  60 -- Parse media URL.
  61 function parse(self)
  62     self.host_id = "spiegel"
  63
  64     Spiegel.get_media_id(self)
  65
  66     local p = Spiegel.get_playlist(self)
  67
  68     self.title = p:match("<headline>(.-)</")
  69                   or error ("no match: media title")
  70
  71     local config  = Spiegel.get_config(self)
  72     local formats = Spiegel.iter_formats(config)
  73
  74     local U       = require 'quvi/util'
  75     local format  = U.choose_format(self, formats,
  76                                     Spiegel.choose_best,
  77                                     Spiegel.choose_default,
  78                                     Spiegel.to_s)
  79                         or error("unable to choose format")
  80     self.duration = (format.duration or 0) * 1000 -- to msec
  81     self.url      = {format.url or error("no match: media url")}
  82
  83     return self
  84 end
  85
  86 --
  87 -- Utility functions
  88 --
  89
  90 function Spiegel.get_media_id(self)
  91     self.id = self.page_url:match("/video/video%-(.-)%.")
  92                 or error ("no match: media id")
  93 end
  94
  95 function Spiegel.get_playlist(self)
  96     local fmt_s = "http://www1.spiegel.de/active/playlist/fcgi/playlist.fcgi/"
  97                .. "asset=flashvideo/mode=id/id=%s"
  98
  99     local playlist_url = string.format(fmt_s, self.id)
 100
 101     return quvi.fetch(playlist_url, {fetch_type = 'playlist'})
 102 end
 103
 104 function Spiegel.get_config(self)
 105     local fmt_s      = "http://video.spiegel.de/flash/%s.xml"
 106     local config_url = string.format(fmt_s, self.id)
 107     return quvi.fetch(config_url, {fetch_type = 'config'})
 108 end
 109
 110 function Spiegel.iter_formats(config)
 111     local p = '<filename>(.-)<'
 112            .. '.-<codec>(.-)<'
 113            .. '.-<totalbitrate>(%d+)'
 114            .. '.-<width>(%d+)'
 115            .. '.-<height>(%d+)'
 116            .. '.-<duration>(%d+)'
 117     local t = {}
 118     for fn,c,b,w,h,d in config:gfind(p) do
 119         local cn = fn:match('%.(%w+)$') or error('no match: container')
 120         local u = 'http://video.spiegel.de/flash/' .. fn
 121 --        print(u,c,b,w,h,cn,d)
 122         table.insert(t, {codec=string.lower(c), url=u,
 123                          width=tonumber(w),     height=tonumber(h),
 124                          bitrate=tonumber(b),   duration=tonumber(d),
 125                          container=cn})
 126     end
 127     return t
 128 end
 129
 130 function Spiegel.choose_best(formats) -- Highest quality available
 131     local r = {width=0, height=0, bitrate=0, url=nil}
 132     local U = require 'quvi/util'
 133     for _,v in pairs(formats) do
 134         if U.is_higher_quality(v,r) then
 135             r = v
 136         end
 137     end
 138     return r
 139 end
 140
 141 function Spiegel.choose_default(formats) -- Lowest quality available
 142     local r = {width=0xffff, height=0xffff, bitrate=0xffff, url=nil}
 143     local U = require 'quvi/util'
 144     for _,v in pairs(formats) do
 145         if U.is_lower_quality(v,r) then
 146             r = v
 147         end
 148     end
 149     return r
 150 end
 151
 152 function Spiegel.to_s(t)
 153     return string.format('%s_%s_%sk_%sp',
 154         t.container, t.codec, t.bitrate, t.height)
 155 end
 156
 157 -- vim: set ts=4 sw=4 tw=72 expandtab: