You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: proxy_base.rb
    path of file: ./repos/flexirest/lib/flexirest
    
    the code of the file until where you have to start completion: require "uri"

module Flexirest
  class ProxyBase
    cattr_accessor :mappings, :request, :original_handler
    cattr_accessor :original_body, :original_get_params, :original_post_params, :original_url

    module ClassMethods
      def get(match, &block)
        add
    
      def handle(request, &block)
        @request = request
        @original_handler = block

        @original_body = request.body
        @body = @original_body.dup

        @original_get_params = request.get_params
        @get_params = @original_get_params.dup

        @original_post_params = request.post_params
        @post_params = (@original_post_params || {}).dup

        @original_url = request.url
        @url = @original_url.dup

        if mapping = find_mapping_for_current_request
          self.class_eval(&mapping.block)
        else
          passthrough
        end