# frozen_string_literal: true require "stringio" require "active_support/inflector" require "action_dispatch/http/headers" require "action_controller/metal/exceptions" require "rack/request" require "action_dispatch/http/cache" require "action_dispatch/http/mime_negotiation" require "action_dispatch/http/parameters" require "action_dispatch/http/filter_parameters" require "action_dispatch/http/upload" require "action_dispatch/http/url" require "active_support/core_ext/array/conversions" module ActionDispatch class Request include Rack::Request::Helpers include ActionDispatch::Http::Cache::Request include ActionDispatch::Http::MimeNegotiation include ActionDispatch::Http::Parameters include ActionDispatch::Http::FilterParameters include ActionDispatch::Http::URL include ActionDispatch::ContentSecurityPolicy::Request include ActionDispatch::FeaturePolicy::Request include Rack::Request::Env autoload :Session, "action_dispatch/request/session" autoload :Utils, "action_dispatch/request/utils" LOCALHOST = Regexp.union [/^127\.\d{1,3}\.\d{1,3}\.\d{1,3}$/, /^::1$/, /^0:0:0:0:0:0:0:1(%.*)?$/] ENV_METHODS = %w[ AUTH_TYPE GATEWAY_INTERFACE PATH_TRANSLATED REMOTE_HOST REMOTE_IDENT REMOTE_USER REMOTE_ADDR SERVER_NAME SERVER_PROTOCOL ORIGINAL_SCRIPT_NAME HTTP_ACCEPT HTTP_ACCEPT_CHARSET HTTP_ACCEPT_ENCODING HTTP_ACCEPT_LANGUAGE HTTP_CACHE_CONTROL HTTP_FROM HTTP_NEGOTIATE HTTP_PRAGMA HTTP_CLIENT_IP HTTP_X_FORWARDED_FOR HTTP_ORIGIN HTTP_VERSION HTTP_X_CSRF_TOKEN HTTP_X_REQUEST_ID HTTP_X_FORWARDED_HOST SERVER_ADDR ].freeze ENV_METHODS.each do |env| class_eval <<-METHOD, __FILE__, __LINE__ + 1 def #{env.sub(/^HTTP_/n, '').downcase} # def accept_charset get_header "#{env}".freeze # get_header "HTTP_ACCEPT_CHARSET".freeze end # end METHOD end def self.empty new({}) end def initialize(env) super @method = nil @request_method = nil @remote_ip = nil @original_fullpath = nil @fullpath = nil @ip = nil end def commit_cookie_jar! # :nodoc: end PASS_NOT_FOUND = Class.new { # :nodoc: def self.action(_); self; end def self.call(_); [404, { "X-Cascade" => "pass" }, []]; end def self.binary_params_for?(action); false; end } def controller_class params = path_parameters params[:action] ||= "index" controller_class_for(params[:controller]) end def controller_class_for(name) if name controller_param = name.underscore const_name = "#{controller_param.camelize}Controller" ActiveSupport::Dependencies.constantize(const_name) else PASS_NOT_FOUND end end # Returns true if the request has a header matching the given key parameter. # # request.key? :ip_spoofing_check # => true def key?(key) has_header? key end # List of HTTP request methods from the following RFCs: # Hypertext Transfer Protocol -- HTTP/1.1 (https://www.ietf.org/rfc/rfc2616.txt) # HTTP Extensions for Distributed Authoring -- WEBDAV (https://www.ietf.org/rfc/rfc2518.txt) # Versioning Extensions to WebDAV (https://www.ietf.org/rfc/rfc3253.txt) # Ordered Collections Protocol (WebDAV) (https://www.ietf.org/rfc/rfc3648.txt) # Web Distributed Authoring and Versioning (WebDAV) Access Control Protocol (https://www.ietf.org/rfc/rfc3744.txt) # Web Distributed Authoring and Versioning (WebDAV) SEARCH (https://www.ietf.org/rfc/rfc5323.txt) # Calendar Extensions to WebDAV (https://www.ietf.org/rfc/rfc4791.txt) # PATCH Method for HTTP (https://www.ietf.org/rfc/rfc5789.txt) RFC2616 = %w(OPTIONS GET HEAD POST PUT DELETE TRACE CONNECT) RFC2518 = %w(PROPFIND PROPPATCH MKCOL COPY MOVE LOCK UNLOCK) RFC3253 = %w(VERSION-CONTROL REPORT CHECKOUT CHECKIN UNCHECKOUT MKWORKSPACE UPDATE LABEL MERGE BASELINE-CONTROL MKACTIVITY) RFC3648 = %w(ORDERPATCH) RFC3744 = %w(ACL) RFC5323 = %w(SEARCH) RFC4791 = %w(MKCALENDAR) RFC5789 = %w(PATCH) HTTP_METHODS = RFC2616 + RFC2518 + RFC3253 + RFC3648 + RFC3744 + RFC5323 + RFC4791 + RFC5789 HTTP_METHOD_LOOKUP = {} # Populate the HTTP method lookup cache. HTTP_METHODS.each { |method| HTTP_METHOD_LOOKUP[method] = method.underscore.to_sym } # Returns the HTTP \method that the application should see. # In the case where the \method was overridden by a middleware # (for instance, if a HEAD request was converted to a GET, # or if a _method parameter was used to determine the \method # the application should use), this \method returns the overridden # value, not the original. def request_method @request_method ||= check_method(super) end def routes # :nodoc: get_header("action_dispatch.routes") end def routes=(routes) # :nodoc: set_header("action_dispatch.routes", routes) end def engine_script_name(_routes) # :nodoc: get_header(_routes.env_key) end def engine_script_name=(name) # :nodoc: set_header(routes.env_key, name.dup) end def request_method=(request_method) #:nodoc: if check_method(request_method) @request_method = set_header("REQUEST_METHOD", request_method) end end def controller_instance # :nodoc: get_header("action_controller.instance") end def controller_instance=(controller) # :nodoc: set_header("action_controller.instance", controller) end def http_auth_salt get_header "action_dispatch.http_auth_salt" end 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 # Returns a symbol form of the #request_method. def request_method_symbol HTTP_METHOD_LOOKUP[request_method] end # Returns the original value of the environment's REQUEST_METHOD, # even if it was overridden by middleware. See #request_method for # more information. def method @method ||= check_method(get_header("rack.methodoverride.original_method") || get_header("REQUEST_METHOD")) end # Returns a symbol form of the #method. def method_symbol HTTP_METHOD_LOOKUP[method] end # Provides access to the request's HTTP headers, for example: # # request.headers["Content-Type"] # => "text/plain" def headers @headers ||= Http::Headers.new(self) end # Early Hints is an HTTP/2 status code that indicates hints to help a client start # making preparations for processing the final response. # # If the env contains +rack.early_hints+ then the server accepts HTTP2 push for Link headers. # # The +send_early_hints+ method accepts a hash of links as follows: # # send_early_hints("Link" => "; rel=preload; as=style\n; rel=preload") # # If you are using +javascript_include_tag+ or +stylesheet_link_tag+ the # Early Hints headers are included by default if supported. def send_early_hints(links) return unless env["rack.early_hints"] env["rack.early_hints"].call(links) end # Returns a +String+ with the last requested path including their params. # # # get '/foo' # request.original_fullpath # => '/foo' # # # get '/foo?bar' # request.original_fullpath # => '/foo?bar' def original_fullpath @original_fullpath ||= (get_header("ORIGINAL_FULLPATH") || fullpath) end # Returns the +String+ full path including params of the last URL requested. # # # get "/articles" # request.fullpath # => "/articles" # # # get "/articles?page=2" # request.fullpath # => "/articles?page=2" def fullpath @fullpath ||= super end # Returns the original request URL as a +String+. # # # get "/articles?page=2" # request.original_url # => "http://www.example.com/articles?page=2" def original_url base_url + original_fullpath end # The +String+ MIME type of the request. # # # get "/articles" # request.media_type # => "application/x-www-form-urlencoded" def media_type content_mime_type.to_s end # Returns the content length of the request as an integer. def content_length super.to_i end # Returns true if the "X-Requested-With" header contains "XMLHttpRequest" # (case-insensitive), which may need to be manually added depending on the # choice of JavaScript libraries and frameworks. def xml_http_request? get_header("HTTP_X_REQUESTED_WITH") =~ /XMLHttpRequest/i end alias :xhr? :xml_http_request? # Returns the IP address of client as a +String+. def ip @ip ||= super end # Returns the IP address of client as a +String+, # usually set by the RemoteIp middleware. def remote_ip @remote_ip ||= (get_header("action_dispatch.remote_ip") || ip).to_s end def remote_ip=(remote_ip) set_header "action_dispatch.remote_ip", remote_ip end ACTION_DISPATCH_REQUEST_ID = "action_dispatch.request_id" # :nodoc: # Returns the unique request id, which is based on either the X-Request-Id header that can # be generated by a firewall, load balancer, or web server or by the RequestId middleware # (which sets the action_dispatch.request_id environment variable). # # This unique ID is useful for tracing a request from end-to-end as part of logging or debugging. # This relies on the Rack variable set by the ActionDispatch::RequestId middleware. def request_id get_header ACTION_DISPATCH_REQUEST_ID end def request_id=(id) # :nodoc: set_header ACTION_DISPATCH_REQUEST_ID, id end alias_method :uuid, :request_id # 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 # Read the request \body. This is useful for web services that need to # work with raw requests directly. 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 # The request body is an IO input stream. If the RAW_POST_DATA environment # variable is already set, wrap it in a StringIO. 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 # 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 not assumed to contain form-data when no # Content-Type header is provided and the request_method is POST. def form_data? FORM_DATA_MEDIA_TYPES.include?(media_type) end def body_stream #:nodoc: get_header("rack.input") end # TODO This should be broken apart into AD::Request::Session and probably # be included by the session middleware. def reset_session if session && session.respond_to?(:destroy) session.destroy else self.session = {} end end def session=(session) #:nodoc: Session.set self, session end def session_options=(options) Session::Options.set self, options end # 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 alias :query_parameters :GET # 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 alias :request_parameters :POST # Returns the authorization header regardless of whether it was specified directly or through one of the # proxy alternatives. def authorization get_header("HTTP_AUTHORIZATION") || get_header("X-HTTP_AUTHORIZATION") || get_header("X_HTTP_AUTHORIZATION") || get_header("REDIRECT_X_HTTP_AUTHORIZATION") end # True if the request came from localhost, 127.0.0.1, or ::1. def local? LOCALHOST =~ remote_addr && LOCALHOST =~ remote_ip end def request_parameters=(params) raise if params.nil? set_header("action_dispatch.request.request_parameters", params) end def logger get_header("action_dispatch.logger") end def commit_flash end def ssl? super || scheme == "wss" end private 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 end end