You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.1 KiB
53 lines
1.1 KiB
#!/usr/bin/env ruby
|
|
# frozen_string_literal: true
|
|
|
|
require 'json'
|
|
require 'net/http'
|
|
require 'net/https'
|
|
require 'uri'
|
|
|
|
class CPIFetcher
|
|
DEFAULT_CPI_SERIES_URL = File.join(
|
|
'https://api.bls.gov',
|
|
'publicAPI/v2/timeseries/data/CUUSA210SA0'
|
|
)
|
|
private_constant :DEFAULT_CPI_SERIES_URL
|
|
attr_reader :url, :bls_token
|
|
|
|
def initialize
|
|
@url = URI(ENV['CPI_SERIES_URL'] || DEFAULT_CPI_SERIES_URL)
|
|
@bls_token = ENV.fetch('BLS_TOKEN')
|
|
end
|
|
|
|
def cpi
|
|
resp = fetch_raw_response
|
|
|
|
return nil unless resp['Results']['series']
|
|
|
|
data = resp['Results']['series'].first['data']
|
|
data.sort! { |a, b| a['year'] <=> b['year'] }
|
|
data.last['value']
|
|
end
|
|
|
|
private
|
|
|
|
def fetch_raw_response
|
|
http = Net::HTTP.new(url.hostname, url.port)
|
|
http.use_ssl = true
|
|
http.verify_mode = OpenSSL::SSL::VERIFY_PEER
|
|
res = http.request(build_request)
|
|
JSON.parse(res.body)
|
|
end
|
|
|
|
def build_request
|
|
req = Net::HTTP::Get.new(url)
|
|
req['Authorization'] = "token #{bls_token}"
|
|
req
|
|
end
|
|
end
|
|
|
|
if $PROGRAM_NAME == __FILE__
|
|
puts CPIFetcher.new.cpi
|
|
exit 0
|
|
end
|