| Current File : //opt/alt/ruby31/share/gems/gems/rack-3.0.8/lib/rack/request.rb |
# frozen_string_literal: true
require_relative 'constants'
require_relative 'utils'
require_relative 'media_type'
module Rack
# Rack::Request provides a convenient interface to a Rack
# environment. It is stateless, the environment +env+ passed to the
# constructor will be directly modified.
#
# req = Rack::Request.new(env)
# req.post?
# req.params["data"]
class Request
class << self
attr_accessor :ip_filter
# The priority when checking forwarded headers. The default
# is <tt>[:forwarded, :x_forwarded]</tt>, which means, check the
# +Forwarded+ header first, followed by the appropriate
# <tt>X-Forwarded-*</tt> header. You can revert the priority by
# reversing the priority, or remove checking of either
# or both headers by removing elements from the array.
#
# This should be set as appropriate in your environment
# based on what reverse proxies are in use. If you are not
# using reverse proxies, you should probably use an empty
# array.
attr_accessor :forwarded_priority
# The priority when checking either the <tt>X-Forwarded-Proto</tt>
# or <tt>X-Forwarded-Scheme</tt> header for the forwarded protocol.
# The default is <tt>[:proto, :scheme]</tt>, to try the
# <tt>X-Forwarded-Proto</tt> header before the
# <tt>X-Forwarded-Scheme</tt> header. Rack 2 had behavior
# similar to <tt>[:scheme, :proto]</tt>. You can remove either or
# both of the entries in array to ignore that respective header.
attr_accessor :x_forwarded_proto_priority
end
@forwarded_priority = [:forwarded, :x_forwarded]
@x_forwarded_proto_priority = [:proto, :scheme]
valid_ipv4_octet = /\.(25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9])/
trusted_proxies = Regexp.union(
/\A127#{valid_ipv4_octet}{3}\z/, # localhost IPv4 range 127.x.x.x, per RFC-3330
/\A::1\z/, # localhost IPv6 ::1
/\Af[cd][0-9a-f]{2}(?::[0-9a-f]{0,4}){0,7}\z/i, # private IPv6 range fc00 .. fdff
/\A10#{valid_ipv4_octet}{3}\z/, # private IPv4 range 10.x.x.x
/\A172\.(1[6-9]|2[0-9]|3[01])#{valid_ipv4_octet}{2}\z/, # private IPv4 range 172.16.0.0 .. 172.31.255.255
/\A192\.168#{valid_ipv4_octet}{2}\z/, # private IPv4 range 192.168.x.x
/\Alocalhost\z|\Aunix(\z|:)/i, # localhost hostname, and unix domain sockets
)
self.ip_filter = lambda { |ip| trusted_proxies.match?(ip) }
ALLOWED_SCHEMES = %w(https http wss ws).freeze
def initialize(env)
@env = env
@params = nil
end
def params
@params ||= super
end
def update_param(k, v)
super
@params = nil
end
def delete_param(k)
v = super
@params = nil
v
end
module Env
# The environment of the request.
attr_reader :env
def initialize(env)
@env = env
# This module is included at least in `ActionDispatch::Request`
# The call to `super()` allows additional mixed-in initializers are called
super()
end
# Predicate method to test to see if `name` has been set as request
# specific data
def has_header?(name)
@env.key? name
end
# Get a request specific value for `name`.
def get_header(name)
@env[name]
end
# If a block is given, it yields to the block if the value hasn't been set
# on the request.
def fetch_header(name, &block)
@env.fetch(name, &block)
end
# Loops through each key / value pair in the request specific data.
def each_header(&block)
@env.each(&block)
end
# Set a request specific value for `name` to `v`
def set_header(name, v)
@env[name] = v
end
# Add a header that may have multiple values.
#
# Example:
# request.add_header 'Accept', 'image/png'
# request.add_header 'Accept', '*/*'
#
# assert_equal 'image/png,*/*', request.get_header('Accept')
#
# http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2
def add_header(key, v)
if v.nil?
get_header key
elsif has_header? key
set_header key, "#{get_header key},#{v}"
else
set_header key, v
end
end
# Delete a request specific value for `name`.
def delete_header(name)
@env.delete name
end
def initialize_copy(other)
@env = other.env.dup
end
end
module Helpers
# 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.
FORM_DATA_MEDIA_TYPES = [
'application/x-www-form-urlencoded',
'multipart/form-data'
]
# 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
PARSEABLE_DATA_MEDIA_TYPES = [
'multipart/related',
'multipart/mixed'
]
# Default ports depending on scheme. Used to decide whether or not
# to include the port in a generated URI.
DEFAULT_PORTS = { 'http' => 80, 'https' => 443, 'coffee' => 80 }
# The address of the client which connected to the proxy.
HTTP_X_FORWARDED_FOR = 'HTTP_X_FORWARDED_FOR'
# The contents of the host/:authority header sent to the proxy.
HTTP_X_FORWARDED_HOST = 'HTTP_X_FORWARDED_HOST'
HTTP_FORWARDED = 'HTTP_FORWARDED'
# The value of the scheme sent to the proxy.
HTTP_X_FORWARDED_SCHEME = 'HTTP_X_FORWARDED_SCHEME'
# The protocol used to connect to the proxy.
HTTP_X_FORWARDED_PROTO = 'HTTP_X_FORWARDED_PROTO'
# The port used to connect to the proxy.
HTTP_X_FORWARDED_PORT = 'HTTP_X_FORWARDED_PORT'
# Another way for specifying https scheme was used.
HTTP_X_FORWARDED_SSL = 'HTTP_X_FORWARDED_SSL'
def body; get_header(RACK_INPUT) end
def script_name; get_header(SCRIPT_NAME).to_s end
def script_name=(s); set_header(SCRIPT_NAME, s.to_s) end
def path_info; get_header(PATH_INFO).to_s end
def path_info=(s); set_header(PATH_INFO, s.to_s) end
def request_method; get_header(REQUEST_METHOD) end
def query_string; get_header(QUERY_STRING).to_s end
def content_length; get_header('CONTENT_LENGTH') end
def logger; get_header(RACK_LOGGER) end
def user_agent; get_header('HTTP_USER_AGENT') end
# the referer of the client
def referer; get_header('HTTP_REFERER') end
alias referrer referer
def session
fetch_header(RACK_SESSION) do |k|
set_header RACK_SESSION, default_session
end
end
def session_options
fetch_header(RACK_SESSION_OPTIONS) do |k|
set_header RACK_SESSION_OPTIONS, {}
end
end
# Checks the HTTP request method (or verb) to see if it was of type DELETE
def delete?; request_method == DELETE end
# Checks the HTTP request method (or verb) to see if it was of type GET
def get?; request_method == GET end
# Checks the HTTP request method (or verb) to see if it was of type HEAD
def head?; request_method == HEAD end
# Checks the HTTP request method (or verb) to see if it was of type OPTIONS
def options?; request_method == OPTIONS end
# Checks the HTTP request method (or verb) to see if it was of type LINK
def link?; request_method == LINK end
# Checks the HTTP request method (or verb) to see if it was of type PATCH
def patch?; request_method == PATCH end
# Checks the HTTP request method (or verb) to see if it was of type POST
def post?; request_method == POST end
# Checks the HTTP request method (or verb) to see if it was of type PUT
def put?; request_method == PUT end
# Checks the HTTP request method (or verb) to see if it was of type TRACE
def trace?; request_method == TRACE end
# Checks the HTTP request method (or verb) to see if it was of type UNLINK
def unlink?; request_method == UNLINK end
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
# The authority of the incoming request as defined by RFC3976.
# https://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.
def authority
forwarded_authority || host_authority || server_authority
end
# The authority as defined by the `SERVER_NAME` and `SERVER_PORT`
# variables.
def server_authority
host = self.server_name
port = self.server_port
if host
if port
"#{host}:#{port}"
else
host
end
end
end
def server_name
get_header(SERVER_NAME)
end
def server_port
get_header(SERVER_PORT)
end
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
def content_type
content_type = get_header('CONTENT_TYPE')
content_type.nil? || content_type.empty? ? nil : content_type
end
def xhr?
get_header("HTTP_X_REQUESTED_WITH") == "XMLHttpRequest"
end
# The `HTTP_HOST` header.
def host_authority
get_header(HTTP_HOST)
end
def host_with_port(authority = self.authority)
host, _, port = split_authority(authority)
if port == DEFAULT_PORTS[self.scheme]
host
else
authority
end
end
# Returns a formatted host, suitable for being used in a URI.
def host
split_authority(self.authority)[0]
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.
def hostname
split_authority(self.authority)[1]
end
def port
if authority = self.authority
_, _, port = split_authority(authority)
end
port || forwarded_port&.last || DEFAULT_PORTS[scheme] || server_port
end
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
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
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
def ssl?
scheme == 'https' || scheme == 'wss'
end
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
# 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:
# http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.7
def media_type
MediaType.type(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' }
def media_type_params
MediaType.params(content_type)
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.
def content_charset
media_type_params['charset']
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.
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 data by checking
# the request media_type against registered parse-data media-types
def parseable_data?
PARSEABLE_DATA_MEDIA_TYPES.include?(media_type)
end
# Returns the data received in the query string.
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
# Returns the data received in the request body.
#
# This method support both application/x-www-form-urlencoded and
# multipart/form-data.
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
# 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.
def params
self.GET.merge(self.POST)
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.
#
# <tt>env['rack.input']</tt> is not touched.
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 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.
#
# <tt>env['rack.input']</tt> is not touched.
def delete_param(k)
post_value, get_value = self.POST.delete(k), self.GET.delete(k)
post_value || get_value
end
def base_url
"#{scheme}://#{host_with_port}"
end
# Tries to return a remake of the original request URL as a string.
def url
base_url + fullpath
end
def path
script_name + path_info
end
def fullpath
query_string.empty? ? path : "#{path}?#{query_string}"
end
def accept_encoding
parse_http_accept_header(get_header("HTTP_ACCEPT_ENCODING"))
end
def accept_language
parse_http_accept_header(get_header("HTTP_ACCEPT_LANGUAGE"))
end
def trusted_proxy?(ip)
Rack::Request.ip_filter.call(ip)
end
# shortcut for <tt>request.params[key]</tt>
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
# shortcut for <tt>request.params[key] = value</tt>
#
# Note that modifications will not be persisted in the env. Use update_param or delete_param if you want to destructively modify params.
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
# like Hash#values_at
def values_at(*keys)
keys.map { |key| params[key] }
end
private
def default_session; {}; end
# Assist with compatibility when processing `X-Forwarded-For`.
def wrap_ipv6(host)
# Even thought IPv6 addresses should be wrapped in square brackets,
# sometimes this is not done in various legacy/underspecified headers.
# So we try to fix this situation for compatibility reasons.
# Try to detect IPv6 addresses which aren't escaped yet:
if !host.start_with?('[') && host.count(':') > 1
"[#{host}]"
else
host
end
end
def parse_http_accept_header(header)
header.to_s.split(",").each(&:strip!).map do |part|
attribute, parameters = part.split(";", 2).each(&:strip!)
quality = 1.0
if parameters and /\Aq=([\d.]+)/ =~ parameters
quality = $1.to_f
end
[attribute, quality]
end
end
# Get an array of values set in the RFC 7239 `Forwarded` request header.
def get_http_forwarded(token)
Utils.forwarded_values(get_header(HTTP_FORWARDED))&.[](token)
end
def query_parser
Utils.default_query_parser
end
def parse_query(qs, d = '&')
query_parser.parse_nested_query(qs, d)
end
def parse_multipart
Rack::Multipart.extract_multipart(self, query_parser)
end
def split_header(value)
value ? value.strip.split(/[,\s]+/) : []
end
# ipv6 extracted from resolv stdlib, simplified
# to remove numbered match group creation.
ipv6 = Regexp.union(
/(?:[0-9A-Fa-f]{1,4}:){7}
[0-9A-Fa-f]{1,4}/x,
/(?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)? ::
(?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?/x,
/(?:[0-9A-Fa-f]{1,4}:){6,6}
\d+\.\d+\.\d+\.\d+/x,
/(?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)? ::
(?:[0-9A-Fa-f]{1,4}:)*
\d+\.\d+\.\d+\.\d+/x,
/[Ff][Ee]80
(?::[0-9A-Fa-f]{1,4}){7}
%[-0-9A-Za-z._~]+/x,
/[Ff][Ee]80:
(?:
(?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)? ::
(?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?
|
:(?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?
)?
:[0-9A-Fa-f]{1,4}%[-0-9A-Za-z._~]+/x)
AUTHORITY = /
\A
(?<host>
# Match IPv6 as a string of hex digits and colons in square brackets
\[(?<address>#{ipv6})\]
|
# Match any other printable string (except square brackets) as a hostname
(?<address>[[[:graph:]&&[^\[\]]]]*?)
)
(:(?<port>\d+))?
\z
/x
private_constant :AUTHORITY
def split_authority(authority)
return [] if authority.nil?
return [] unless match = AUTHORITY.match(authority)
return match[:host], match[:address], match[:port]&.to_i
end
def reject_trusted_ip_addresses(ip_addresses)
ip_addresses.reject { |ip| trusted_proxy?(ip) }
end
FORWARDED_SCHEME_HEADERS = {
proto: HTTP_X_FORWARDED_PROTO,
scheme: HTTP_X_FORWARDED_SCHEME
}.freeze
private_constant :FORWARDED_SCHEME_HEADERS
def forwarded_scheme
forwarded_priority.each do |type|
case type
when :forwarded
if (forwarded_proto = get_http_forwarded(:proto)) &&
(scheme = allowed_scheme(forwarded_proto.last))
return scheme
end
when :x_forwarded
x_forwarded_proto_priority.each do |x_type|
if header = FORWARDED_SCHEME_HEADERS[x_type]
split_header(get_header(header)).reverse_each do |scheme|
if allowed_scheme(scheme)
return scheme
end
end
end
end
end
end
nil
end
def allowed_scheme(header)
header if ALLOWED_SCHEMES.include?(header)
end
def forwarded_priority
Request.forwarded_priority
end
def x_forwarded_proto_priority
Request.x_forwarded_proto_priority
end
end
include Env
include Helpers
end
end
# :nocov:
require_relative 'multipart' unless defined?(Rack::Multipart)
# :nocov: