This is an example Sinatra code block that should get and print out the last day's worth of data from the Withings api. Unfortunately, the Time class returns Fixnums, which I'm having trouble incorporating into request string (I'm getting type errors).

Fixnum to string issues

require 'rest_client'

get '/withings' do
    userid = 'id'
    public_key = 'key'
    now = Time.now.to_i
    yestr = now - (24 * 60 * 60)

    url = 'http://wbsapi.withings.net/measure?action=getmeas&userid=' + userid + '&publickey=' + public_key +'&startdate='  + yestr.to_s + '&enddate=' + now.to_s ' + &limit=1';

    data = RestClient.get(url)
    data = JSON.parse(data.body)
    data = data['body']['measuregrps'][0]['measures'][0]['value'] * 0.00220462
    puts data.round_to(2)
end