Let me scan for servers.

bin/viera_play

@@ -2,7 +2,19 @@
 
 require "viera_play"
 
-VieraPlay::Player.new(
-  :tv_control_url => ENV["TV_CONTROL_URL"],
-  :file_path => ARGV.first
-).call
+case ARGV.first
+when nil
+  STDERR.puts "Usage:"
+  STDERR.puts "# Play a file:\n\t#{$0} [FILENAME]"
+  STDERR.puts "# List available servers:\n\t#{$0} -l"
+  exit 1
+when '-l'
+  VieraPlay::Scanner.services.each do |name, url|
+    puts "#{name}\t#{url}"
+  end
+else
+  VieraPlay::Player.new(
+    :tv_control_url => ENV["TV_CONTROL_URL"],
+    :file_path => ARGV.first
+  ).call
+end

lib/viera_play.rb

@@ -2,3 +2,4 @@
 require "viera_play/tv"
 require "viera_play/soapy"
 require "viera_play/player"
+require "viera_play/scanner"

lib/viera_play/scanner.rb

@@ -0,0 +1,40 @@
+require 'upnp/ssdp'
+require 'nokogiri'
+require 'open-uri'
+require 'uri'
+
+UPnP.log=false
+
+class VieraPlay::Scanner
+  def self.services
+    @instance ||= new
+    @instance.services
+  end
+
+  def services
+    services = UPnP::SSDP.search(service_type)
+    locations = services.map{|v| v[:location] }.uniq
+    locations.inject(Hash.new){ |acc, location|
+      acc.merge(fetch_and_parse_service_description(location))
+    }
+  end
+
+protected
+
+  def service_type
+    'urn:schemas-upnp-org:service:AVTransport:1'
+  end
+
+  def fetch_and_parse_service_description(service_description_url)
+    Nokogiri::XML(open(service_description_url))
+    services = doc.css('service')
+    rendering_controller_services = services.select{|service|
+      service.css('serviceType').text == service_type
+    }
+    rendering_controller_services.map{|service|
+      control_path = service.css('controlURL').text
+      control_url = URI.join(service_description_url, control_path)
+      { doc.css('friendlyName').text => control_url }
+    }
+  end
+end