module Rack::Request::Helpers

Constants

DEFAULT_PORTS: Default ports depending on scheme. Used to decide whether or not to include the port in a generated URI.
FORM_DATA_MEDIA_TYPES: The set of form-data media-types. Requests that do not indicate one of the media types present in this list will not be eligible for form-data / param parsing.
HTTP_FORWARDED
HTTP_X_FORWARDED_FOR: The address of the client which connected to the proxy.
HTTP_X_FORWARDED_HOST: The contents of the host/:authority header sent to the proxy.
HTTP_X_FORWARDED_PORT: The port used to connect to the proxy.
HTTP_X_FORWARDED_PROTO: The protocol used to connect to the proxy.
HTTP_X_FORWARDED_SCHEME: The value of the scheme sent to the proxy.
HTTP_X_FORWARDED_SSL: Another way for specifying https scheme was used.
PARSEABLE_DATA_MEDIA_TYPES: The set of media-types. Requests that do not indicate one of the media types present in this list will not be eligible for param parsing like soap attachments or generic multiparts

Attributes

Allow overriding the query parser that the receiver will use. By default Rack::Utils.default_query_parser is used.

Public Instance Methods

Source

# File lib/rack/request.rb, line 577
def GET
  get_header(RACK_REQUEST_QUERY_HASH) || set_header(RACK_REQUEST_QUERY_HASH, parse_query(query_string, '&'))
end

Returns the data received in the query string.

POST ()

Source

# File lib/rack/request.rb, line 628
def POST
  if form_hash = get_header(RACK_REQUEST_FORM_HASH)
    return form_hash
  elsif error = get_header(RACK_REQUEST_FORM_ERROR)
    raise error.class, error.message, cause: error.cause
  end

  pairs = form_pairs
  set_header RACK_REQUEST_FORM_HASH, expand_param_pairs(pairs)
end

Returns the data received in the request body.

This method support both application/x-www-form-urlencoded and multipart/form-data.

accept_encoding ()

Source

# File lib/rack/request.rb, line 697
def accept_encoding
  parse_http_accept_header(get_header("HTTP_ACCEPT_ENCODING"))
end

accept_language ()

Source

# File lib/rack/request.rb, line 701
def accept_language
  parse_http_accept_header(get_header("HTTP_ACCEPT_LANGUAGE"))
end

authority ()

Source

# File lib/rack/request.rb, line 348
def authority
  forwarded_authority || host_authority || server_authority
end

The authority of the incoming request as defined by RFC3976. tools.ietf.org/html/rfc3986#section-3.2

In HTTP/1, this is the host header. In HTTP/2, this is the :authority pseudo-header.

base_url ()

Source

# File lib/rack/request.rb, line 680
def base_url
  "#{scheme}://#{host_with_port}"
end

body ()

Source

# File lib/rack/request.rb, line 276
def body;            get_header(RACK_INPUT)                         end

content_charset ()

Source

# File lib/rack/request.rb, line 551
def content_charset
  media_type_params['charset']
end

The character set of the request body if a “charset” media type parameter was given, or nil if no “charset” was specified. Note that, per RFC2616, text/* media types that specify no explicit charset are to be considered ISO-8859-1.

content_length ()

Source

# File lib/rack/request.rb, line 285
def content_length;  get_header('CONTENT_LENGTH')                   end

content_type ()

Source

# File lib/rack/request.rb, line 390
def content_type
  content_type = get_header('CONTENT_TYPE')
  content_type.nil? || content_type.empty? ? nil : content_type
end

cookies ()

Source

# File lib/rack/request.rb, line 375
def cookies
  hash = fetch_header(RACK_REQUEST_COOKIE_HASH) do |key|
    set_header(key, {})
  end

  string = get_header(HTTP_COOKIE)

  unless string == get_header(RACK_REQUEST_COOKIE_STRING)
    hash.replace Utils.parse_cookies_header(string)
    set_header(RACK_REQUEST_COOKIE_STRING, string)
  end

  hash
end

delete? ()

Source

# File lib/rack/request.rb, line 306
def delete?;  request_method == DELETE  end

Checks the HTTP request method (or verb) to see if it was of type DELETE

delete_param (k)

Source

# File lib/rack/request.rb, line 675
def delete_param(k)
  post_value, get_value = self.POST.delete(k), self.GET.delete(k)
  post_value || get_value
end

Destructively delete a parameter, whether it’s in GET or POST. Returns the value of the deleted parameter.

If the parameter is in both GET and POST, the POST value takes precedence since that’s how params works.

env['rack.input'] is not touched.

form_data? ()

Source

# File lib/rack/request.rb, line 563
def form_data?
  type = media_type
  meth = get_header(RACK_METHODOVERRIDE_ORIGINAL_METHOD) || get_header(REQUEST_METHOD)

  (meth == POST && type.nil?) || FORM_DATA_MEDIA_TYPES.include?(type)
end

Determine whether the request body contains form-data by checking the request content-type for one of the media-types: “application/x-www-form-urlencoded” or “multipart/form-data”. The list of form-data media types can be modified through the FORM_DATA_MEDIA_TYPES array.

A request body is also assumed to contain form-data when no content-type header is provided and the request_method is POST.

form_pairs ()

Source

# File lib/rack/request.rb, line 585
def form_pairs
  if pairs = get_header(RACK_REQUEST_FORM_PAIRS)
    return pairs
  elsif error = get_header(RACK_REQUEST_FORM_ERROR)
    raise error.class, error.message, cause: error.cause
  end

  begin
    rack_input = get_header(RACK_INPUT)

    # Otherwise, figure out how to parse the input:
    if rack_input.nil?
      set_header(RACK_REQUEST_FORM_PAIRS, [])
    elsif form_data? || parseable_data?
      if pairs = Rack::Multipart.parse_multipart(env, Rack::Multipart::ParamList)
        set_header RACK_REQUEST_FORM_PAIRS, pairs
      else
        # Add 2 bytes. One to check whether it is over the limit, and a second
        # in case the slice! call below removes the last byte
        # If read returns nil, use the empty string
        form_vars = get_header(RACK_INPUT).read(query_parser.bytesize_limit + 2) || ''

        # Fix for Safari Ajax postings that always append \0
        # form_vars.sub!(/\0\z/, '') # performance replacement:
        form_vars.slice!(-1) if form_vars.end_with?("\0")

        set_header RACK_REQUEST_FORM_VARS, form_vars
        pairs = query_parser.parse_query_pairs(form_vars, '&')
        set_header(RACK_REQUEST_FORM_PAIRS, pairs)
      end
    else
      set_header(RACK_REQUEST_FORM_PAIRS, [])
    end
  rescue => error
    set_header(RACK_REQUEST_FORM_ERROR, error)
    raise
  end
end

Returns the form data pairs received in the request body.

This method support both application/x-www-form-urlencoded and multipart/form-data.

forwarded_authority ()

Source

# File lib/rack/request.rb, line 484
def forwarded_authority
  forwarded_priority.each do |type|
    case type
    when :forwarded
      if forwarded = get_http_forwarded(:host)
        return forwarded.last
      end
    when :x_forwarded
      if (value = get_header(HTTP_X_FORWARDED_HOST)) && (x_forwarded_host = split_header(value).last)
        return wrap_ipv6(x_forwarded_host)
      end
    end
  end

  nil
end

forwarded_for ()

Source

# File lib/rack/request.rb, line 444
def forwarded_for
  forwarded_priority.each do |type|
    case type
    when :forwarded
      if forwarded_for = get_http_forwarded(:for)
        return(forwarded_for.map! do |authority|
          split_authority(authority)[1]
        end)
      end
    when :x_forwarded
      if value = get_header(HTTP_X_FORWARDED_FOR)
        return(split_header(value).map do |authority|
          split_authority(wrap_ipv6(authority))[1]
        end)
      end
    end
  end

  nil
end

forwarded_port ()

Source

# File lib/rack/request.rb, line 465
def forwarded_port
  forwarded_priority.each do |type|
    case type
    when :forwarded
      if forwarded = get_http_forwarded(:for)
        return(forwarded.map do |authority|
          split_authority(authority)[2]
        end.compact)
      end
    when :x_forwarded
      if value = get_header(HTTP_X_FORWARDED_PORT)
        return split_header(value).map(&:to_i)
      end
    end
  end

  nil
end

fullpath ()

Source

# File lib/rack/request.rb, line 693
def fullpath
  query_string.empty? ? path : "#{path}?#{query_string}"
end

get? ()

Source

# File lib/rack/request.rb, line 309
def get?;     request_method == GET     end

Checks the HTTP request method (or verb) to see if it was of type GET

head? ()

Source

# File lib/rack/request.rb, line 312
def head?;    request_method == HEAD    end

Checks the HTTP request method (or verb) to see if it was of type HEAD

host ()

Source

# File lib/rack/request.rb, line 424
def host
  split_authority(self.authority)[0]
end

Returns a formatted host, suitable for being used in a URI.

host_authority ()

Source

# File lib/rack/request.rb, line 409
def host_authority
  get_header(HTTP_HOST)
end

The HTTP_HOST header.

host_with_port (authority = self.authority)

Source

# File lib/rack/request.rb, line 413
def host_with_port(authority = self.authority)
  host, _, port = split_authority(authority)

  if port == DEFAULT_PORTS[self.scheme]
    host
  else
    authority
  end
end

hostname ()

Source

# File lib/rack/request.rb, line 432
def hostname
  split_authority(self.authority)[1]
end

Returns an address suitable for being to resolve to an address. In the case of a domain name or IPv4 address, the result is the same as host. In the case of IPv6 or future address formats, the square brackets are removed.

ip ()

Source

# File lib/rack/request.rb, line 505
def ip
  remote_addresses = split_header(get_header('REMOTE_ADDR'))

  remote_addresses.reverse_each do |ip|
    return ip unless trusted_proxy?(ip)
  end

  if (forwarded_for = self.forwarded_for) && !forwarded_for.empty?
    # The forwarded for addresses are ordered: client, proxy1, proxy2.
    # So we reject all the trusted addresses (proxy*) and return the
    # last client. Or if we trust everyone, we just return the first
    # address.
    forwarded_for.reverse_each do |ip|
      return ip unless trusted_proxy?(ip)
    end
    return forwarded_for.first
  end

  # If all the addresses are trusted, and we aren't forwarded, just return
  # the first remote address, which represents the source of the request.
  remote_addresses.first
end

link? ()

Source

# File lib/rack/request.rb, line 318
def link?;    request_method == LINK    end

Checks the HTTP request method (or verb) to see if it was of type LINK

logger ()

Source

# File lib/rack/request.rb, line 286
def logger;          get_header(RACK_LOGGER)                        end

media_type ()

Source

# File lib/rack/request.rb, line 534
def media_type
  MediaType.type(content_type)
end

The media type (type/subtype) portion of the CONTENT_TYPE header without any media type parameters. e.g., when CONTENT_TYPE is “text/plain;charset=utf-8”, the media-type is “text/plain”.

For more information on the use of media types in HTTP, see: www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.7

media_type_params ()

Source

# File lib/rack/request.rb, line 543
def media_type_params
  MediaType.params(content_type)
end

The media type parameters provided in CONTENT_TYPE as a Hash, or an empty Hash if no CONTENT_TYPE or media-type parameters were provided. e.g., when the CONTENT_TYPE is “text/plain;charset=utf-8”, this method responds with the following Hash:

{ 'charset' => 'utf-8' }

options? ()

Source

# File lib/rack/request.rb, line 315
def options?; request_method == OPTIONS end

Checks the HTTP request method (or verb) to see if it was of type OPTIONS

params ()

Source

# File lib/rack/request.rb, line 642
def params
  self.GET.merge(self.POST)
end

The union of GET and POST data.

Note that modifications will not be persisted in the env. Use update_param or delete_param if you want to destructively modify params.

parseable_data? ()

Source

# File lib/rack/request.rb, line 572
def parseable_data?
  PARSEABLE_DATA_MEDIA_TYPES.include?(media_type)
end

Determine whether the request body contains data by checking the request media_type against registered parse-data media-types

patch? ()

Source

# File lib/rack/request.rb, line 321
def patch?;   request_method == PATCH   end

Checks the HTTP request method (or verb) to see if it was of type PATCH

path ()

Source

# File lib/rack/request.rb, line 689
def path
  script_name + path_info
end

path_info ()

Source

# File lib/rack/request.rb, line 280
def path_info;       get_header(PATH_INFO).to_s                     end

path_info= (s)

Source

# File lib/rack/request.rb, line 281
def path_info=(s);   set_header(PATH_INFO, s.to_s)                  end

port ()

Source

# File lib/rack/request.rb, line 436
def port
  if authority = self.authority
    _, _, port = split_authority(authority)
  end

  port || forwarded_port&.last || DEFAULT_PORTS[scheme] || server_port
end

post? ()

Source

# File lib/rack/request.rb, line 324
def post?;    request_method == POST    end

Checks the HTTP request method (or verb) to see if it was of type POST

prefetch? ()

Source

# File lib/rack/request.rb, line 404
def prefetch?
  get_header("HTTP_SEC_PURPOSE") == "prefetch"
end

Checks whether the Sec-Purpose header is set to indicate a prefetch request through, e.g., <a href=“…” rel=“prefetch”>…</a>.

developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Sec-Purpose wicg.github.io/nav-speculation/prefetch.html#sec-purpose-header

put? ()

Source

# File lib/rack/request.rb, line 327
def put?;     request_method == PUT     end

Checks the HTTP request method (or verb) to see if it was of type PUT

query_string ()

Source

# File lib/rack/request.rb, line 284
def query_string;    get_header(QUERY_STRING).to_s                  end

referer ()

Source

# File lib/rack/request.rb, line 290
def referer;         get_header('HTTP_REFERER')                     end

the referer of the client

Also aliased as: referrer

referrer ()

Alias for: referer

request_method ()

Source

# File lib/rack/request.rb, line 283
def request_method;  get_header(REQUEST_METHOD)                     end

scheme ()

Source

# File lib/rack/request.rb, line 335
def scheme
  if get_header(HTTPS) == 'on'
    'https'
  else
    forwarded_scheme || get_header(RACK_URL_SCHEME)
  end
end

script_name ()

Source

# File lib/rack/request.rb, line 277
def script_name;     get_header(SCRIPT_NAME).to_s                   end

script_name= (s)

Source

# File lib/rack/request.rb, line 278
def script_name=(s); set_header(SCRIPT_NAME, s.to_s)                end

server_authority ()

Source

# File lib/rack/request.rb, line 354
def server_authority
  host = self.server_name
  port = self.server_port

  if host
    if port
      "#{host}:#{port}"
    else
      host
    end
  end
end

The authority as defined by the SERVER_NAME and SERVER_PORT variables.

server_name ()

Source

# File lib/rack/request.rb, line 367
def server_name
  get_header(SERVER_NAME)
end

server_port ()

Source

# File lib/rack/request.rb, line 371
def server_port
  get_header(SERVER_PORT)
end

session ()

Source

# File lib/rack/request.rb, line 293
def session
  fetch_header(RACK_SESSION) do |k|
    set_header RACK_SESSION, default_session
  end
end

session_options ()

Source

# File lib/rack/request.rb, line 299
def session_options
  fetch_header(RACK_SESSION_OPTIONS) do |k|
    set_header RACK_SESSION_OPTIONS, {}
  end
end

ssl? ()

Source

# File lib/rack/request.rb, line 501
def ssl?
  scheme == 'https' || scheme == 'wss'
end

trace? ()

Source

# File lib/rack/request.rb, line 330
def trace?;   request_method == TRACE   end

Checks the HTTP request method (or verb) to see if it was of type TRACE

trusted_proxy? (ip)

Source

# File lib/rack/request.rb, line 708
def trusted_proxy?(ip)
  trusted_proxy = get_header(RACK_REQUEST_TRUSTED_PROXY)

  case trusted_proxy
  when nil
    # Default to class-level ip_filter:
    Rack::Request.ip_filter.call(ip)
  when true, false
    trusted_proxy
  else
    # Treat as callable:
    trusted_proxy.call(ip)
  end
end

Determine whether the given IP address is considered a trusted proxy.

@returns [Boolean] true if the given IP is a trusted proxy, false otherwise.

unlink? ()

Source

# File lib/rack/request.rb, line 333
def unlink?;  request_method == UNLINK  end

Checks the HTTP request method (or verb) to see if it was of type UNLINK

update_param (k, v)

Source

# File lib/rack/request.rb, line 655
def update_param(k, v)
  found = false
  if self.GET.has_key?(k)
    found = true
    self.GET[k] = v
  end
  if self.POST.has_key?(k)
    found = true
    self.POST[k] = v
  end
  unless found
    self.GET[k] = v
  end
end

Destructively update a parameter, whether it’s in GET and/or POST. Returns nil.

The parameter is updated wherever it was previous defined, so GET, POST, or both. If it wasn’t previously defined, it’s inserted into GET.

env['rack.input'] is not touched.

url ()

Source

# File lib/rack/request.rb, line 685
def url
  base_url + fullpath
end

Tries to return a remake of the original request URL as a string.

user_agent ()

Source

# File lib/rack/request.rb, line 287
def user_agent;      get_header('HTTP_USER_AGENT')                  end

xhr? ()

Source

# File lib/rack/request.rb, line 395
def xhr?
  get_header("HTTP_X_REQUESTED_WITH") == "XMLHttpRequest"
end