HttpRequestBase.rb

class HttpRequestBase
  HTTP_VERBS = [:get, :post, :delete, :put].freeze

  attr_reader :response, :timeout

  def initialize(args={})
    @timeout = args[:timeout] || default_timeout
    post_initialize(args)
  end

  # override in child
  def base_url
    raise NotImplementedError
  end

  def default_timeout
    10
  end

  # override to modify http object (add headers, etc)
  def modify_request(http)
    http
  end

  # post initialize hook
  def post_initialize(args)
    nil
  end

  def request(method, path, params)
    unless HTTP_VERBS.include?(method)
      warn("HTTP method not supported") and return nil
    end

    url = "#{base_url}#{path}"
    @response = Curl.send(method, url, params) do |http|
      http.timeout = timeout
      modify_request(http)
    end
  ensure
    log(method, url, params)
  end

  class << self
    HTTP_VERBS.each do |action|
      define_method(action) do |path, params={}|
        new.tap do |obj|
          obj.request(action, path, params)
        end
      end
    end
  end

  private
  def log(method, url, params)
    status = response ? response.status : "FAILED"
    Rails.logger.info("#{status} method=#{method.upcase} #{url} #{params}")
  end
end

class GithubRequest < HttpRequestBase
  def base_url
    'https://api.github.com'
  end

  def modify_request(http)
    http.headers['User-Agent'] = 'Valid Agent'
  end

  # this could definitely be put into an included module/concern
  def json_body(default="{}")
    raw = response ? response.body : default
    JSON.parse(raw, symbolize_names: true)
  end
end

http = GithubRequest.get('/users/ebtoulson')