mplayer.rb

gistfile1.rb

# control mplayer remotely via rack
#
# load & append files (mp3, ogg, etc) & lists (m3u)                                                       
#   http://localhost:3000/mplayer/loadfile+http://www.archive.org/download/af002/03_Swiss_Jazz.mp3        
#   http://localhost:3000/mplayer/loadlist+http://www.archive.org/stream/af002                            
#                                                                                                         
# playback                                                                                                
#   http://localhost:3000/mplayer/pause                                                                   
#   http://localhost:3000/mplayer/stop                                                                    
#                                                                                                         
# reset                                                                                                   
#   http://localhost:3000/mplayer/quit                                                                    
#                                                                                                         
# volume control                                                                                          
#   http://localhost:3000/mplayer/volume+10+1                                                             
#   http://localhost:3000/mplayer/volume+60+1                                                             
#                                                                                                         
module Rack
  class Mplayer

    HEADERS = { "Content-Type" => "text/plain" }
    NAMESPACE = 'mplayer'

    def initialize(app)
      @app = app
      @regexp = %r[^/#{NAMESPACE}/(.*)]
      instanciate_mplayer
    end

    def call(env)
      if md = env["PATH_INFO"].match(@regexp)
        cmd = CGI::unescape(md.to_a.last)
        begin
          @in.puts cmd
        rescue
          instanciate_mplayer
          @in.puts cmd
        end
        [ 200, HEADERS, cmd ]
      else
        @app.call env
      end
    end

    private

    def instanciate_mplayer
      cmd = "mplayer -quiet -idle -slave"
      @in, @out, @err = Open3.popen3 cmd
    end

  end
end