share/lua/website/soundcloud.lua

   1
   2 -- libquvi-scripts
   3 -- Copyright (C) 2011  Bastien Nocera <hadess@hadess.net>
   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 local Soundcloud = {} -- Utility functions unique to this script
  23
  24 -- Identify the script.
  25 function ident(self)
  26     package.path = self.script_dir .. '/?.lua'
  27     local C      = require 'quvi/const'
  28     local r      = {}
  29     r.domain     = "soundcloud%.com"
  30     r.formats    = "default"
  31     r.categories = C.proto_http
  32     local U      = require 'quvi/util'
  33     r.handles    = U.handles(self.page_url,
  34                     {r.domain}, {"/.+/.+$", "/player.swf"})
  35     return r
  36 end
  37
  38 -- Query available formats.
  39 function query_formats(self)
  40     self.formats = 'default'
  41     return self
  42 end
  43
  44 -- Parse media URL.
  45 function parse(self)
  46     self.host_id = "soundcloud"
  47     Soundcloud.normalize(self)
  48
  49     local p = quvi.fetch(self.page_url)
  50     local m = p:match("window%.SC%.bufferTracks%.push(%(.-%);)")
  51                 or error("no match: metadata")
  52
  53     self.id = m:match('"uid":"(%w-)"') or error("no match: media id")
  54
  55     self.thumbnail_url = ''
  56     self.title = nil -- Ugly but works.
  57     for c,p in p:gmatch('<meta content="(.-)" property="(.-)"') do
  58         if p == 'og:title' then
  59             self.title = c
  60         elseif p == 'og:image' then
  61             if not c:find('placeholder%.png') then
  62                 self.thumbnail_url = c
  63             end
  64         end
  65     end
  66
  67     self.title = self.title or error("no match: media title")
  68     self.duration = tonumber(m:match('"duration":(%d-),')) or 0
  69
  70     local s  = m:match('"streamUrl":"(.-)"') or error("no match: media URL")
  71     self.url = {s}
  72
  73     return self
  74 end
  75
  76 --
  77 -- Utility functions
  78 --
  79
  80 function Soundcloud.normalize(self) -- "Normalize" an embedded URL
  81     local url = self.page_url:match('swf%?url=(.-)$')
  82     if not url then return end
  83
  84     local U = require 'quvi/util'
  85     local oe_url = string.format(
  86         'http://soundcloud.com/oembed?url=%s&format=json', U.unescape(url))
  87
  88     local s = quvi.fetch(oe_url):match('href=\\"(.-)\\"')
  89     self.page_url = s or error('no match: page url')
  90 end
  91
  92 -- vim: set ts=4 sw=4 tw=72 expandtab: