class Restforce::Client

def connection
  @connection ||= Faraday.new(@options[:instance_url]) do |builder|
    builder.use      Restforce::Middleware::Mashify, self, @options
    builder.use      Restforce::Middleware::Multipart
    builder.request  :json
    builder.use      authentication_middleware, self, @options if authentication_middleware
    builder.use      Restforce::Middleware::Authorization, self, @options
    builder.use      Restforce::Middleware::InstanceURL, self, @options
    builder.response :json
    builder.use      Restforce::Middleware::Caching, cache, @options if cache
    builder.use      FaradayMiddleware::FollowRedirects
    builder.use      Restforce::Middleware::RaiseError
    builder.use      Restforce::Middleware::Logger, Restforce.configuration.logger, @options if Restforce.log?
    builder.adapter  Faraday.default_adapter
  end
  @connection
end