google speech recognition with ruby

google_speech_recognition.rb

require 'rest_client'
require 'json'
a = `sox -d --norm -t .flac - silence -l 1 0 1% 1 6.0 1% rate 16k`
#a = `arecord -q -d 3 -c 1 -f S16_LE -r 22050 -t wav | flac - -f --totally-silent -o-`
r = RestClient.post 'https://www.google.com/speech-api/v1/recognize?lang=en-US', a,
                    :content_type => 'audio/x-flac; rate=16000'
if j = JSON.parse(r)
  (p j; `espeak 'you said: #{j['hypotheses'].first['utterance']}'`)
end