share/lua/website/soundcloud.lua

   1
   2 -- quvi
   3 -- Copyright (C) 2011  Bastien Nocera <hadess@hadess.net>
   4 --
   5 -- This file is part of quvi <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 local Soundcloud = {} -- Utility functions unique to this script
  24
  25 -- Identify the script.
  26 function ident(self)
  27     package.path = self.script_dir .. '/?.lua'
  28     local C      = require 'quvi/const'
  29     local r      = {}
  30     r.domain     = "soundcloud.com"
  31     r.formats    = "default"
  32     r.categories = C.proto_http
  33     local U      = require 'quvi/util'
  34     r.handles    = U.handles(self.page_url,
  35                     {r.domain}, {"/.+/.+$", "/player.swf"})
  36     return r
  37 end
  38
  39 -- Query available formats.
  40 function query_formats(self)
  41     self.formats = 'default'
  42     return self
  43 end
  44
  45 -- Parse media URL.
  46 function parse(self)
  47     self.host_id  = "soundcloud"
  48
  49     Soundcloud.normalize(self)
  50
  51     local page = quvi.fetch(self.page_url)
  52
  53     local _,_,s = page:find("window%.SC%.bufferTracks%.push(%(.-%);)")
  54     local metadata = s or error("no match: metadata")
  55
  56     local _,_,s = metadata:find('"uid":"(%w-)"')
  57     self.id = s or error("no match: media id")
  58
  59     local _,_,s = metadata:find('"title":"(.-)"')
  60     local title  = s or error("no match: media title")
  61     -- Unescape the Unicode strings if any
  62     -- the HTML will be unescaped by quvi itself
  63     self.title = string.gsub(title, "\\u(%d+)",
  64         function (h)
  65             return string.char(tonumber(h, 16))
  66         end)
  67
  68     local _,_,s = page:find('content="([:/%w%?%.-]-)" property="og:image"')
  69     self.thumbnail_url = s or ""
  70
  71     local _,_,s = metadata:find('"duration":(%d-),')
  72     self.duration = tonumber(s) or 0
  73
  74     local _,_,s = metadata:find('"streamUrl":"(.-)"')
  75     self.url  = { s }  or error("no match: stream URL")
  76
  77     return self
  78 end
  79
  80 --
  81 -- Utility functions
  82 --
  83
  84 function Soundcloud.normalize(self) -- "Normalize" an embedded URL
  85     local url = self.page_url:match('swf%?url=(.-)$')
  86     if not url then return end
  87
  88     local U = require 'quvi/util'
  89     local oe_url = string.format(
  90         'http://soundcloud.com/oembed?url=%s&format=json', U.unescape(url))
  91
  92     local s = quvi.fetch(oe_url):match('href=\\"(.-)\\"')
  93     self.page_url = s or error('no match: page url')
  94 end
  95
  96 -- vim: set ts=4 sw=4 tw=72 expandtab: