share/lua/website/mgnetwork.lua

   1 --
   2 -- libquvi-scripts
   3 -- Copyright (C) 2011  quvi project
   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: Media General is a company that owns many local news stations
  25 -- and newspapers in the southeast US. They all use the same system for
  26 -- videos.
  27 --  <http://sourceforge.net/apps/trac/quvi/ticket/78>
  28 --
  29
  30 local MGNetwork = {} -- Utility functions unique to this script
  31
  32 -- Identify the script.
  33 function ident(self)
  34     package.path = self.script_dir .. '/?.lua'
  35     local C      = require 'quvi/const'
  36     local r      = {}
  37     local domains= {'alabamas13%.com', 'counton2%.com',
  38         'dailyprogress%.com', 'dothaneagle%.com', 'eprisenow%.com',
  39         'eufaulatribune%.com', 'godanriver%.com', 'hickoryrecord%.com',
  40         'independenttribune%.com', 'insidenova%.com', 'jcfloridan%.com',
  41         'journalnow%.com', 'oanow%.com', 'morganton%.com',
  42         'nbc4i%.com', 'nbc17%.com', 'newsadvance%.com',
  43         'newsvirginian%.com', 'richmond%.com', 'sceneon7%.com',
  44         'scnow%.com', 'starexponent%.com', 'statesville%.com',
  45         'tbo%.com', 'timesdispatch%.com', 'tricities%.com',
  46         'turnto10%.com', 'wnct%.com', 'whlt%.com', 'wjbf%.com',
  47         'wjtv%.com', 'wkrg%.com', 'wrbl%.com', 'wsav%.com', 'wsls%.com',
  48         'wspa%.com', 'vteffect%.com'}
  49     r.domain     = 'mgnetwork%.com'
  50     r.formats    = 'default|best'
  51     r.categories = C.proto_http
  52     local U      = require 'quvi/util'
  53     r.handles    = U.handles(self.page_url,
  54             domains,
  55             {"/%w+/.+%-%d+"})
  56     return r
  57 end
  58
  59 -- Query available formats.
  60 function query_formats(self)
  61     local config  = MGNetwork.get_config(self)
  62     local formats = MGNetwork.iter_formats(config)
  63
  64     local t = {}
  65     for _,v in pairs(formats) do
  66         table.insert(t, MGNetwork.to_s(v))
  67     end
  68
  69     table.sort(t)
  70     self.formats = table.concat(t, "|")
  71
  72     return self
  73 end
  74
  75 -- Parse media URL.
  76 function parse(self)
  77     self.host_id = 'mgnetwork'
  78
  79     local xml = MGNetwork.get_config(self)
  80
  81     self.title = xml:match('<item>.-<title>(.-)</title>')
  82                     or error("no match: media title")
  83
  84     local formats = MGNetwork.iter_formats(xml)
  85     local U       = require 'quvi/util'
  86     local format  = U.choose_format(self, formats,
  87                                     MGNetwork.choose_best,
  88                                     MGNetwork.choose_default,
  89                                     MGNetwork.to_s)
  90                         or error("unable to choose format")
  91     self.url = {format.url or error("no match: media url")}
  92
  93     -- Optional: we can live without these
  94
  95     self.thumbnail_url = xml:match('<media:thumbnail url="(.-)"') or ''
  96
  97     local d = xml:match('duration="(.-)"') or 0
  98     self.duration = math.ceil(d) * 1000 -- to msec
  99
 100     return self
 101 end
 102
 103 --
 104 -- Utility functions
 105 --
 106
 107 function MGNetwork.get_config(self)
 108     -- local config_url = string.format(
 109     --    'http://%s/video/get/media_response_related_' ..
 110     --    'for_content/%s/%d/', d, v, self.id)
 111     local d,v,s = self.page_url:match("http://([%w%.]+)/.+%-(%w+)%-(%d+)/")
 112     self.id = s or error("no match: media id")
 113
 114     -- Ideally, we'd skip this step and just get the config.
 115     -- Do this so that we can check whether the video exists.
 116     local d = quvi.fetch(self.page_url)
 117     local p = "if %(!mrss_link%){ mrss_link = '(.-)'; }"
 118     local s = d:match(p) or error('no match: no video found on page')
 119
 120     return quvi.fetch(s, {fetch_type = 'config'})
 121 end
 122
 123 function MGNetwork.iter_formats(config)
 124     local p = 'content url="(.-)" type="%w+/(.-)"'
 125     local t = {}
 126     for u,c in config:gfind(p) do
 127         table.insert(t, {url=u, container=c})
 128         --print(u,c)
 129     end
 130     return t
 131 end
 132
 133 function MGNetwork.choose_best(t) -- Expect the first to be the 'best'
 134   return t[1]
 135 end
 136
 137 function MGNetwork.choose_default(t) -- Expect the last to be the 'default'
 138   return t[#t]
 139 end
 140
 141 function MGNetwork.to_s(t)
 142   return t.container
 143 end
 144
 145 -- vim: set ts=4 sw=4 tw=72 expandtab: