class ActionDispatch::Request

def self.empty 

def self.empty
  new({})
end

def GET

Override Rack's GET method to support indifferent access. 
def GET
  fetch_header("action_dispatch.request.query_parameters") do |k|
    rack_query_params = super || {}
    # Check for non UTF-8 parameter values, which would cause errors later
    Request::Utils.check_param_encoding(rack_query_params)
    set_header k, Request::Utils.normalize_encode_params(rack_query_params)
  end
rescue Rack::Utils::ParameterTypeError, Rack::Utils::InvalidParameterError => e
  raise ActionController::BadRequest.new("Invalid query parameters: #{e.message}")
end

def POST

Override Rack's POST method to support indifferent access. 
def POST
  fetch_header("action_dispatch.request.request_parameters") do
    pr = parse_formatted_parameters(params_parsers) do |params|
      super || {}
    end
    self.request_parameters = Request::Utils.normalize_encode_params(pr)
  end
rescue Rack::Utils::ParameterTypeError, Rack::Utils::InvalidParameterError => e
  raise ActionController::BadRequest.new("Invalid request parameters: #{e.message}")
end

def authenticated_encrypted_cookie_salt 

def authenticated_encrypted_cookie_salt
  get_header Cookies::AUTHENTICATED_ENCRYPTED_COOKIE_SALT
end

def authorization

proxy alternatives.
Returns the authorization header regardless of whether it was specified directly or through one of the 
def authorization
  get_header("HTTP_AUTHORIZATION")   ||
  get_header("X-HTTP_AUTHORIZATION") ||
  get_header("X_HTTP_AUTHORIZATION") ||
  get_header("REDIRECT_X_HTTP_AUTHORIZATION")
end

def body

variable is already set, wrap it in a StringIO.
The request body is an IO input stream. If the RAW_POST_DATA environment 
def body
  if raw_post = get_header("RAW_POST_DATA")
    raw_post = raw_post.dup.force_encoding(Encoding::BINARY)
    StringIO.new(raw_post)
  else
    body_stream
  end
end

def body_stream #:nodoc:

:nodoc: 
def body_stream #:nodoc:
  get_header("rack.input")
end

def check_method(name) 

def check_method(name)
  HTTP_METHOD_LOOKUP[name] || raise(ActionController::UnknownHttpMethod, "#{name}, accepted HTTP methods are #{HTTP_METHODS[0...-1].join(', ')}, and #{HTTP_METHODS[-1]}")
  name
end

def commit_cookie_jar! # :nodoc:

:nodoc: 
def commit_cookie_jar! # :nodoc:
end

def commit_cookie_jar! 

def commit_cookie_jar!
  cookie_jar.commit!
end

def commit_flash 

def commit_flash
end

def content_length

Returns the content length of the request as an integer. 
def content_length
  super.to_i
end

def controller_class 

def controller_class
  params = path_parameters
  params[:action] ||= "index"
  controller_class_for(params[:controller])
end

def controller_class_for(name) 

def controller_class_for(name)
  if name
    controller_param = name.underscore
    const_name = "#{controller_param.camelize}Controller"
    begin
      ActiveSupport::Dependencies.constantize(const_name)
    rescue NameError => error
      if error.missing_name == const_name || const_name.start_with?("#{error.missing_name}::")
        raise MissingController.new(error.message, error.name)
      else
        raise
      end
    end
  else
    PASS_NOT_FOUND
  end
end

def controller_instance # :nodoc:

:nodoc: 
def controller_instance # :nodoc:
  get_header("action_controller.instance")
end

def controller_instance=(controller) # :nodoc:

:nodoc: 
def controller_instance=(controller) # :nodoc:
  set_header("action_controller.instance", controller)
end

def cookie_jar 

def cookie_jar
  fetch_header("action_dispatch.cookies") do
    self.cookie_jar = Cookies::CookieJar.build(self, cookies)
  end
end

def cookie_jar=(jar) 

def cookie_jar=(jar)
  set_header "action_dispatch.cookies", jar
end

def cookies_digest 

def cookies_digest
  get_header Cookies::COOKIES_DIGEST
end

def cookies_rotations 

def cookies_rotations
  get_header Cookies::COOKIES_ROTATIONS
end

def cookies_serializer 

def cookies_serializer
  get_header Cookies::COOKIES_SERIALIZER
end

def encrypted_cookie_cipher 

def encrypted_cookie_cipher
  get_header Cookies::ENCRYPTED_COOKIE_CIPHER
end

def encrypted_cookie_salt 

def encrypted_cookie_salt
  get_header Cookies::ENCRYPTED_COOKIE_SALT
end

def encrypted_signed_cookie_salt 

def encrypted_signed_cookie_salt
  get_header Cookies::ENCRYPTED_SIGNED_COOKIE_SALT
end

def engine_script_name(_routes) # :nodoc:

:nodoc: 
def engine_script_name(_routes) # :nodoc:
  get_header(_routes.env_key)
end

def engine_script_name=(name) # :nodoc:

:nodoc: 
def engine_script_name=(name) # :nodoc:
  set_header(routes.env_key, name.dup)
end

def form_data?

Content-Type header is provided and the request_method is POST.
A request body is not assumed to contain form-data when no

+FORM_DATA_MEDIA_TYPES+ array.
list of form-data media types can be modified through the
"application/x-www-form-urlencoded" or "multipart/form-data". The
the request Content-Type for one of the media-types:
Determine whether the request body contains form-data by checking 
def form_data?
  FORM_DATA_MEDIA_TYPES.include?(media_type)
end

def fullpath

request.fullpath # => "/articles?page=2"
# get "/articles?page=2"

request.fullpath # => "/articles"
# get "/articles"

Returns the +String+ full path including params of the last URL requested. 
def fullpath
  @fullpath ||= super
end

def have_cookie_jar? 

def have_cookie_jar?
  has_header? "action_dispatch.cookies"
end

def headers

request.headers["Content-Type"] # => "text/plain"

Provides access to the request's HTTP headers, for example: 
def headers
  @headers ||= Http::Headers.new(self)
end

def http_auth_salt 

def http_auth_salt
  get_header "action_dispatch.http_auth_salt"
end

def initialize(env) 

def initialize(env)
  super
  @method            = nil
  @request_method    = nil
  @remote_ip         = nil
  @original_fullpath = nil
  @fullpath          = nil
  @ip                = nil
end

def ip

Returns the IP address of client as a +String+. 
def ip
  @ip ||= super
end

def key?(key)

request.key? :ip_spoofing_check # => true

Returns true if the request has a header matching the given key parameter. 
def key?(key)
  has_header? key
end

def key_generator 

def key_generator
  get_header Cookies::GENERATOR_KEY
end

def local?

True if the request came from localhost, 127.0.0.1, or ::1. 
def local?
  LOCALHOST =~ remote_addr && LOCALHOST =~ remote_ip
end

def logger 

def logger
  get_header("action_dispatch.logger")
end

def media_type

request.media_type # => "application/x-www-form-urlencoded"
# get "/articles"

The +String+ MIME type of the request. 
def media_type
  content_mime_type.to_s
end

def method

more information.
even if it was overridden by middleware. See #request_method for
Returns the original value of the environment's REQUEST_METHOD, 
def method
  @method ||= check_method(get_header("rack.methodoverride.original_method") || get_header("REQUEST_METHOD"))
end

def method_symbol

Returns a symbol form of the #method. 
def method_symbol
  HTTP_METHOD_LOOKUP[method]
end

def original_fullpath

request.original_fullpath # => '/foo?bar'
# get '/foo?bar'

request.original_fullpath # => '/foo'
# get '/foo'

Returns a +String+ with the last requested path including their params. 
def original_fullpath
  @original_fullpath ||= (get_header("ORIGINAL_FULLPATH") || fullpath)
end

def original_url

request.original_url # => "http://www.example.com/articles?page=2"
# get "/articles?page=2"

Returns the original request URL as a +String+. 
def original_url
  base_url + original_fullpath
end

def raw_post

work with raw requests directly.
Read the request \body. This is useful for web services that need to 
def raw_post
  unless has_header? "RAW_POST_DATA"
    raw_post_body = body
    set_header("RAW_POST_DATA", raw_post_body.read(content_length))
    raw_post_body.rewind if raw_post_body.respond_to?(:rewind)
  end
  get_header "RAW_POST_DATA"
end

def remote_ip

usually set by the RemoteIp middleware.
Returns the IP address of client as a +String+, 
def remote_ip
  @remote_ip ||= (get_header("action_dispatch.remote_ip") || ip).to_s
end

def remote_ip=(remote_ip) 

def remote_ip=(remote_ip)
  set_header "action_dispatch.remote_ip", remote_ip
end

def request_id

This relies on the Rack variable set by the ActionDispatch::RequestId middleware.
This unique ID is useful for tracing a request from end-to-end as part of logging or debugging.

(which sets the action_dispatch.request_id environment variable).
be generated by a firewall, load balancer, or web server or by the RequestId middleware
Returns the unique request id, which is based on either the X-Request-Id header that can 
def request_id
  get_header ACTION_DISPATCH_REQUEST_ID
end

def request_id=(id) # :nodoc:

:nodoc: 
def request_id=(id) # :nodoc:
  set_header ACTION_DISPATCH_REQUEST_ID, id
end

def request_method

value, not the original.
the application should use), this \method returns the overridden
or if a _method parameter was used to determine the \method
(for instance, if a HEAD request was converted to a GET,
In the case where the \method was overridden by a middleware
Returns the HTTP \method that the application should see. 
def request_method
  @request_method ||= check_method(super)
end

def request_method=(request_method) #:nodoc:

:nodoc: 
def request_method=(request_method) #:nodoc:
  if check_method(request_method)
    @request_method = set_header("REQUEST_METHOD", request_method)
  end
end

def request_method_symbol

Returns a symbol form of the #request_method. 
def request_method_symbol
  HTTP_METHOD_LOOKUP[request_method]
end

def request_parameters=(params) 

def request_parameters=(params)
  raise if params.nil?
  set_header("action_dispatch.request.request_parameters", params)
end

def reset_session

be included by the session middleware.
TODO This should be broken apart into AD::Request::Session and probably 
def reset_session
  if session && session.respond_to?(:destroy)
    session.destroy
  else
    self.session = {}
  end
end

def routes # :nodoc:

:nodoc: 
def routes # :nodoc:
  get_header("action_dispatch.routes")
end

def routes=(routes) # :nodoc:

:nodoc: 
def routes=(routes) # :nodoc:
  set_header("action_dispatch.routes", routes)
end

def secret_key_base 

def secret_key_base
  get_header Cookies::SECRET_KEY_BASE
end

def send_early_hints(links)

Early Hints headers are included by default if supported.
If you are using +javascript_include_tag+ or +stylesheet_link_tag+ the

send_early_hints("Link" => "; rel=preload; as=style\n; rel=preload")

The +send_early_hints+ method accepts a hash of links as follows:

If the env contains +rack.early_hints+ then the server accepts HTTP2 push for Link headers.

making preparations for processing the final response.
Early Hints is an HTTP/2 status code that indicates hints to help a client start 
def send_early_hints(links)
  return unless env["rack.early_hints"]
  env["rack.early_hints"].call(links)
end

def server_software

Returns the lowercase name of the HTTP server software. 
def server_software
  (get_header("SERVER_SOFTWARE") && /^([a-zA-Z]+)/ =~ get_header("SERVER_SOFTWARE")) ? $1.downcase : nil
end

def session=(session) #:nodoc:

:nodoc: 
def session=(session) #:nodoc:
  Session.set self, session
end

def session_options=(options) 

def session_options=(options)
  Session::Options.set self, options
end

def show_exceptions? # :nodoc:

:nodoc: 
def show_exceptions? # :nodoc:
  # We're treating `nil` as "unset", and we want the default setting to be
  # `true`. This logic should be extracted to `env_config` and calculated
  # once.
  !(get_header("action_dispatch.show_exceptions") == false)
end

def signed_cookie_digest 

def signed_cookie_digest
  get_header Cookies::SIGNED_COOKIE_DIGEST
end

def signed_cookie_salt 

def signed_cookie_salt
  get_header Cookies::SIGNED_COOKIE_SALT
end

def ssl? 

def ssl?
  super || scheme == "wss"
end

def use_authenticated_cookie_encryption 

def use_authenticated_cookie_encryption
  get_header Cookies::USE_AUTHENTICATED_COOKIE_ENCRYPTION
end

def use_cookies_with_metadata 

def use_cookies_with_metadata
  get_header Cookies::USE_COOKIES_WITH_METADATA
end

def xml_http_request?

choice of JavaScript libraries and frameworks.
(case-insensitive), which may need to be manually added depending on the
Returns true if the "X-Requested-With" header contains "XMLHttpRequest" 
def xml_http_request?
  get_header("HTTP_X_REQUESTED_WITH") =~ /XMLHttpRequest/i
end