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34 lines
637 B
34 lines
637 B
#!/usr/bin/env ruby
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require 'uri'
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require 'net/http'
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require 'json'
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class CPIFetcher
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DEFAULT_CPI_SERIES_URL = 'http://api.bls.gov/publicAPI/v2/timeseries/data/CUUSA210SA0'
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attr_reader :cpi_series_url
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def initialize
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@cpi_series_url = URI(ENV['CPI_SERIES_URL'] || DEFAULT_CPI_SERIES_URL)
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end
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def cpi
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resp = fetch_raw_response
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return nil unless resp['Results']['series']
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resp['Results']['series'].first['data'].first['value']
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end
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private
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def fetch_raw_response
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JSON.parse(Net::HTTP.get_response(cpi_series_url).body)
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end
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end
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if $PROGRAM_NAME == __FILE__
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puts CPIFetcher.new.cpi
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exit 0
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end
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