Ruby connect to TicketMatic 3 API JSON

connect_ticketmatic.rb

require 'openssl'
require 'Base64'
require 'net/http'

def connect(url)
  # I'm calling this method from other files, url is what you want to get. For example '/events'
  
  # Put your keys and customer name in 3 config files or change the code to get them from environment variables
  access_key = File.open('access_key.txt', &:readline).strip
  secret_key = File.open('secret_key.txt', &:readline).strip
  name       = File.open('customer.txt', &:readline).strip

  # Here is wat the example request from TicketMatic looks like
  # Authorization: TM-HMAC-SHA256 key=242dda885ec6024f934a40c0 ts=2014-09-23T17:23:00 sign=c27dc92415cb20dca85fec44f31b60b522bc3c9e422cb24a35dfc8538a1ab570
  time = Time.now.utc.strftime('%Y-%m-%dT%H:%M:%S')
  uri = URI("https://apps.ticketmatic.com/api/1/#{name}" + url)
  hmac = OpenSSL::HMAC.hexdigest(OpenSSL::Digest.new('sha256'), secret_key, access_key + name + time)
  req = Net::HTTP::Get.new(uri)
  req['Authorization'] = "TM-HMAC-SHA256 key=#{access_key} ts=#{time} sign=#{hmac}"
  res = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(req) }
  
  # This returns the result, you have will probably have to parse it with JSON.parse
  return res.body
end