faraday_proxy.rb

#!/usr/bin/env ruby
require 'faraday'
require 'logger'

url = 'https://requestb.in/1fkjebe1'
proxy = ENV.fetch('PROXY')
logger = Logger.new($stdout)

conn = Faraday.new do |faraday|
  faraday.response :logger, logger
  faraday.proxy proxy
  faraday.adapter Faraday.default_adapter

  res = faraday.get do |req|
    req.url url
  end
end