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

Public Instance Methods

shortcut for request.params[key]

# File lib/rack/request.rb, line 609
def [](key)
  warn("Request#[] is deprecated and will be removed in a future version of Rack. Please use request.params[] instead", uplevel: 1)

  params[key.to_s]
end

[]= (key, value)

shortcut for request.params[key] = value

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

# File lib/rack/request.rb, line 618
def []=(key, value)
  warn("Request#[]= is deprecated and will be removed in a future version of Rack. Please use request.params[]= instead", uplevel: 1)

  params[key.to_s] = value
end

GET ()

Returns the data received in the query string.

# File lib/rack/request.rb, line 484
def GET
  if get_header(RACK_REQUEST_QUERY_STRING) == query_string
    get_header(RACK_REQUEST_QUERY_HASH)
  else
    query_hash = parse_query(query_string, '&')
    set_header(RACK_REQUEST_QUERY_STRING, query_string)
    set_header(RACK_REQUEST_QUERY_HASH, query_hash)
  end
end

POST ()

Returns the data received in the request body.

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

# File lib/rack/request.rb, line 498
def POST
  if error = get_header(RACK_REQUEST_FORM_ERROR)
    raise error.class, error.message, cause: error.cause
  end

  begin
    rack_input = get_header(RACK_INPUT)

    # If the form hash was already memoized:
    if form_hash = get_header(RACK_REQUEST_FORM_HASH)
      # And it was memoized from the same input:
      if get_header(RACK_REQUEST_FORM_INPUT).equal?(rack_input)
        return form_hash
      end
    end

    # Otherwise, figure out how to parse the input:
    if rack_input.nil?
      set_header RACK_REQUEST_FORM_INPUT, nil
      set_header(RACK_REQUEST_FORM_HASH, {})
    elsif form_data? || parseable_data?
      unless set_header(RACK_REQUEST_FORM_HASH, parse_multipart)
        form_vars = get_header(RACK_INPUT).read

        # 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
        set_header RACK_REQUEST_FORM_HASH, parse_query(form_vars, '&')
      end

      set_header RACK_REQUEST_FORM_INPUT, get_header(RACK_INPUT)
      get_header RACK_REQUEST_FORM_HASH
    else
      set_header RACK_REQUEST_FORM_INPUT, get_header(RACK_INPUT)
      set_header(RACK_REQUEST_FORM_HASH, {})
    end
  rescue => error
    set_header(RACK_REQUEST_FORM_ERROR, error)
    raise
  end
end

accept_encoding ()

# File lib/rack/request.rb, line 596
def accept_encoding
  parse_http_accept_header(get_header("HTTP_ACCEPT_ENCODING"))
end

accept_language ()

# File lib/rack/request.rb, line 600
def accept_language
  parse_http_accept_header(get_header("HTTP_ACCEPT_LANGUAGE"))
end

authority ()

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.

# File lib/rack/request.rb, line 266
def authority
  forwarded_authority || host_authority || server_authority
end

base_url ()

# File lib/rack/request.rb, line 579
def base_url
  "#{scheme}://#{host_with_port}"
end

body ()

# File lib/rack/request.rb, line 190
def body;            get_header(RACK_INPUT)                         end

content_charset ()

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.

# File lib/rack/request.rb, line 458
def content_charset
  media_type_params['charset']
end

content_length ()

# File lib/rack/request.rb, line 199
def content_length;  get_header('CONTENT_LENGTH')                   end

content_type ()

# File lib/rack/request.rb, line 308
def content_type
  content_type = get_header('CONTENT_TYPE')
  content_type.nil? || content_type.empty? ? nil : content_type
end

cookies ()

# File lib/rack/request.rb, line 293
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? ()

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

# File lib/rack/request.rb, line 220
def delete?;  request_method == DELETE  end

delete_param (k)

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.

# File lib/rack/request.rb, line 574
def delete_param(k)
  post_value, get_value = self.POST.delete(k), self.GET.delete(k)
  post_value || get_value
end

form_data? ()

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.

# File lib/rack/request.rb, line 470
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

forwarded_authority ()

# File lib/rack/request.rb, line 393
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)
        return wrap_ipv6(split_header(value).last)
      end
    end
  end

  nil
end

forwarded_for ()

# File lib/rack/request.rb, line 353
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 ()

# File lib/rack/request.rb, line 374
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 ()

# File lib/rack/request.rb, line 592
def fullpath
  query_string.empty? ? path : "#{path}?#{query_string}"
end

get? ()

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

# File lib/rack/request.rb, line 223
def get?;     request_method == GET     end

head? ()

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

# File lib/rack/request.rb, line 226
def head?;    request_method == HEAD    end

host ()

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

# File lib/rack/request.rb, line 333
def host
  split_authority(self.authority)[0]
end

host_authority ()

The ‘HTTP_HOST` header.

# File lib/rack/request.rb, line 318
def host_authority
  get_header(HTTP_HOST)
end

host_with_port (authority = self.authority)

# File lib/rack/request.rb, line 322
def host_with_port(authority = self.authority)
  host, _, port = split_authority(authority)

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

hostname ()

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.

# File lib/rack/request.rb, line 341
def hostname
  split_authority(self.authority)[1]
end

ip ()

# File lib/rack/request.rb, line 414
def ip
  remote_addresses = split_header(get_header('REMOTE_ADDR'))
  external_addresses = reject_trusted_ip_addresses(remote_addresses)

  unless external_addresses.empty?
    return external_addresses.last
  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.
    return reject_trusted_ip_addresses(forwarded_for).last || 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? ()

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

# File lib/rack/request.rb, line 232
def link?;    request_method == LINK    end

logger ()

# File lib/rack/request.rb, line 200
def logger;          get_header(RACK_LOGGER)                        end

media_type ()

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

# File lib/rack/request.rb, line 441
def media_type
  MediaType.type(content_type)
end

media_type_params ()

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' }

# File lib/rack/request.rb, line 450
def media_type_params
  MediaType.params(content_type)
end

options? ()

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

# File lib/rack/request.rb, line 229
def options?; request_method == OPTIONS end

params ()

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.

# File lib/rack/request.rb, line 545
def params
  self.GET.merge(self.POST)
end

parseable_data? ()

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

# File lib/rack/request.rb, line 479
def parseable_data?
  PARSEABLE_DATA_MEDIA_TYPES.include?(media_type)
end

patch? ()

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

# File lib/rack/request.rb, line 235
def patch?;   request_method == PATCH   end

path ()

# File lib/rack/request.rb, line 588
def path
  script_name + path_info
end

path_info ()

# File lib/rack/request.rb, line 194
def path_info;       get_header(PATH_INFO).to_s                     end

path_info= (s)

# File lib/rack/request.rb, line 195
def path_info=(s);   set_header(PATH_INFO, s.to_s)                  end

port ()

# File lib/rack/request.rb, line 345
def port
  if authority = self.authority
    _, _, port = split_authority(authority)
  end

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

post? ()

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

# File lib/rack/request.rb, line 238
def post?;    request_method == POST    end

put? ()

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

# File lib/rack/request.rb, line 241
def put?;     request_method == PUT     end

query_string ()

# File lib/rack/request.rb, line 198
def query_string;    get_header(QUERY_STRING).to_s                  end

referer ()

the referer of the client

# File lib/rack/request.rb, line 204
def referer;         get_header('HTTP_REFERER')                     end

Also aliased as: referrer

referrer ()

Alias for: referer

request_method ()

# File lib/rack/request.rb, line 197
def request_method;  get_header(REQUEST_METHOD)                     end

scheme ()

# File lib/rack/request.rb, line 249
def scheme
  if get_header(HTTPS) == 'on'
    'https'
  elsif get_header(HTTP_X_FORWARDED_SSL) == 'on'
    'https'
  elsif forwarded_scheme
    forwarded_scheme
  else
    get_header(RACK_URL_SCHEME)
  end
end

script_name ()

# File lib/rack/request.rb, line 191
def script_name;     get_header(SCRIPT_NAME).to_s                   end

script_name= (s)

# File lib/rack/request.rb, line 192
def script_name=(s); set_header(SCRIPT_NAME, s.to_s)                end

server_authority ()

The authority as defined by the ‘SERVER_NAME` and `SERVER_PORT` variables.

# File lib/rack/request.rb, line 272
def server_authority
  host = self.server_name
  port = self.server_port

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

server_name ()

# File lib/rack/request.rb, line 285
def server_name
  get_header(SERVER_NAME)
end

server_port ()

# File lib/rack/request.rb, line 289
def server_port
  get_header(SERVER_PORT)
end

session ()

# File lib/rack/request.rb, line 207
def session
  fetch_header(RACK_SESSION) do |k|
    set_header RACK_SESSION, default_session
  end
end

session_options ()

# File lib/rack/request.rb, line 213
def session_options
  fetch_header(RACK_SESSION_OPTIONS) do |k|
    set_header RACK_SESSION_OPTIONS, {}
  end
end

ssl? ()

# File lib/rack/request.rb, line 410
def ssl?
  scheme == 'https' || scheme == 'wss'
end

trace? ()

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

# File lib/rack/request.rb, line 244
def trace?;   request_method == TRACE   end

trusted_proxy? (ip)

# File lib/rack/request.rb, line 604
def trusted_proxy?(ip)
  Rack::Request.ip_filter.call(ip)
end

unlink? ()

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

# File lib/rack/request.rb, line 247
def unlink?;  request_method == UNLINK  end

update_param (k, v)

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.

# File lib/rack/request.rb, line 554
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

url ()

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

# File lib/rack/request.rb, line 584
def url
  base_url + fullpath
end

user_agent ()

# File lib/rack/request.rb, line 201
def user_agent;      get_header('HTTP_USER_AGENT')                  end

values_at (*keys)

like Hash#values_at

# File lib/rack/request.rb, line 625
def values_at(*keys)
  keys.map { |key| params[key] }
end

xhr? ()

# File lib/rack/request.rb, line 313
def xhr?
  get_header("HTTP_X_REQUESTED_WITH") == "XMLHttpRequest"
end