#!ruby -Ku
#  Wifi接続したGoProをRubyから制御するサンプル
#  by GOROman

require 'net/http'

class GoProControl

  def initialize( host )
    @http     = Net::HTTP.new( host )
    @password = get_password()
  end

  def get_password
    res = control( "bacpac", "sd" )
    res.unpack("CCa*")[2]
  end

  def control( type, command, param = nil )
    str  = "/#{type}/#{command}"
    str += "?t=#{@password}" if @password
    str += "&p=%#{param}"    if param

    res = @http.get( str )
    res.body    
  end

  def shutter
    control( "bacpac", "SH", "01" )
  end

  def mode( param )
    control( "camera", "CM", param )
  end
end

IP     = "10.5.5.9"
camera = GoProControl.new( IP )

# 01:写真撮影モード
camera.mode( "01" )

# シャッターを切る
camera.shutter