Simple rest client

rest_client.rb

require 'uri'
require 'json'
require 'net/http'

module RestClient
  class << self
    def get(path)
      execute :get, path
    end

    def post(path, body)
      execute :post, path, body
    end

    def put(path, body)
      execute :put, path, body
    end

    def delete(path)
      execute :delete, path
    end

    private

    def execute(method, path, body = nil)
      response = request(method, path, body)

      if method == :get && response.code.to_i == 404
        # retry up to 3 times
        2.times do
          response = request(method, path, body)

          return if response.code.to_i == 200
        end
      end

      if response.header && response.header['Content-Type'].start_with?('application/json')
        begin
          JSON.parse(response.body, symbolize_names: true)
        rescue
          response.body
        end
      else
        response.body
      end
    end

    def request_class_for(method)
      case method.downcase.to_sym
      when :get
        ::Net::HTTP::Get
      when :post
        ::Net::HTTP::Post
      when :put
        ::Net::HTTP::Put
      when :delete
        ::Net::HTTP::Delete
      else
        raise "method: #{method} isn't allowed."
      end
    end

    def http(uri)
      ::Net::HTTP.new(uri.host, uri.port)
    end

    def request(method, uri, body = nil)
      body = body.to_json if (body.is_a? Hash) || (body.is_a? Array)

      request_path = uri.request_uri

      # puts "#{Tty.purple}#{method.upcase} #{request_path}, #{body}#{Tty.reset}"

      request = request_class_for(method).new(request_path.to_s)
      request['Accept'] = 'application/json'

      if body
        request.content_type = 'application/json'
        request.body = body
      end

      http(uri).request(request)
    end
  end
end