share/util/resolve_redirections.lua

   1 -- libquvi-scripts
   2 -- Copyright (C) 2012-2013  Toni Gundogdu <legatvs@gmail.com>
   3 --
   4 -- This file is part of libquvi-scripts <http://quvi.sourceforge.net/>.
   5 --
   6 -- This program is free software: you can redistribute it and/or
   7 -- modify it under the terms of the GNU Affero General Public
   8 -- License as published by the Free Software Foundation, either
   9 -- version 3 of the License, or (at your option) any later version.
  10 --
  11 -- This program is distributed in the hope that it will be useful,
  12 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 -- GNU Affero General Public License for more details.
  15 --
  16 -- You should have received a copy of the GNU Affero General
  17 -- Public License along with this program.  If not, see
  18 -- <http://www.gnu.org/licenses/>.
  19 --
  20
  21 local ResolveExceptions = {} -- Utility functions unique to this script
  22
  23 function resolve_redirections(qargs)
  24   -- Let libcURL resolve the URL redirections for us.
  25   local r = quvi.http.resolve(qargs.input_url)
  26   if #r.resolved_url ==0 then return qargs.input_url end
  27
  28   -- Apply any exception rules to the destination URL.
  29   return ResolveExceptions.YouTube(qargs, r.resolved_url)
  30 end
  31
  32 --
  33 -- Utility functions
  34 --
  35
  36 function ResolveExceptions.YouTube(qargs, dst)
  37   -- [UPDATE] 2012-11-18: g00gle servers seem not to strip the #t anymore
  38   return dst
  39 --[[
  40   -- Preserve the t= parameter (if any). The g00gle servers
  41   -- strip them from the destination URL after redirecting.
  42   -- e.g. http://www.youtube.com/watch?v=LWxTGJ3TK1U#t=2m22s
  43   --   -> http://www.youtube.com/watch?v=LWxTGJ3TK1U
  44   return dst .. (qargs.input_url:match('(#t=%w+)') or '')
  45 ]]--
  46 end
  47
  48 -- vim: set ts=2 sw=2 tw=72 expandtab: