cheat sheets.

Methods
  - accepts
  - content_type
  - delete?
  - domain
  - env
  - formatted_post?
  - get?
  - head?
  - host
  - host_with_port
  - method
  - parameters
  - path
  - path_parameters
  - port
  - port_string
  - post?
  - post_format
  - protocol
  - put?
  - raw_post
  - relative_url_root
  - remote_ip
  - request_uri
  - server_software
  - ssl?
  - standard_port
  - subdomains
  - symbolized_path_parameters
  - xhr?
  - xml_http_request?
  - xml_post?
  - yaml_post?