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require 'rack/utils' 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 # The environment of the request. attr_reader :env def initialize(env) @env = env end def body; @env["rack.input"] end def script_name; @env[SCRIPT_NAME].to_s end def path_info; @env[PATH_INFO].to_s end def request_method; @env["REQUEST_METHOD"] end def query_string; @env[QUERY_STRING].to_s end def content_length; @env['CONTENT_LENGTH'] end def content_type content_type = @env['CONTENT_TYPE'] content_type.nil? || content_type.empty? ? nil : content_type end def session; @env['rack.session'] ||= {} end def session_options; @env['rack.session.options'] ||= {} end def logger; @env['rack.logger'] 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 content_type && content_type.split(/\s*[;,]\s*/, 2).first.downcase 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 return {} if content_type.nil? Hash[*content_type.split(/\s*[;,]\s*/)[1..-1]. collect { |s| s.split('=', 2) }. map { |k,v| [k.downcase, strip_doublequotes(v)] }.flatten] 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 def scheme if @env['HTTPS'] == 'on' 'https' elsif @env['HTTP_X_FORWARDED_SSL'] == 'on' 'https' elsif @env['HTTP_X_FORWARDED_SCHEME'] @env['HTTP_X_FORWARDED_SCHEME'] elsif @env['HTTP_X_FORWARDED_PROTO'] @env['HTTP_X_FORWARDED_PROTO'].split(',')[0] else @env["rack.url_scheme"] end end def ssl? scheme == 'https' end def host_with_port if forwarded = @env["HTTP_X_FORWARDED_HOST"] forwarded.split(/,\s?/).last else @env['HTTP_HOST'] || "#{@env['SERVER_NAME'] || @env['SERVER_ADDR']}:#{@env['SERVER_PORT']}" end end def port if port = host_with_port.split(/:/)[1] port.to_i elsif port = @env['HTTP_X_FORWARDED_PORT'] port.to_i elsif @env.has_key?("HTTP_X_FORWARDED_HOST") DEFAULT_PORTS[scheme] elsif @env.has_key?("HTTP_X_FORWARDED_PROTO") DEFAULT_PORTS[@env['HTTP_X_FORWARDED_PROTO'].split(',')[0]] else @env["SERVER_PORT"].to_i end end def host # Remove port number. host_with_port.to_s.sub(/:\d+\z/, '') end def script_name=(s); @env["SCRIPT_NAME"] = s.to_s end def path_info=(s); @env["PATH_INFO"] = s.to_s 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 # The set of form-data media-types. Requests that do not indicate # one of the media types presents 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 presents 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 } # 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 = env["rack.methodoverride.original_method"] || env[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 @env["rack.request.query_string"] == query_string @env["rack.request.query_hash"] else p = parse_query({ :query => query_string, :separator => '&;' }) @env["rack.request.query_string"] = query_string @env["rack.request.query_hash"] = p 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 @env["rack.input"].nil? raise "Missing rack.input" elsif @env["rack.request.form_input"].equal? @env["rack.input"] @env["rack.request.form_hash"] elsif form_data? || parseable_data? unless @env["rack.request.form_hash"] = parse_multipart(env) form_vars = @env["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[-1] == ?\0 @env["rack.request.form_vars"] = form_vars @env["rack.request.form_hash"] = parse_query({ :query => form_vars, :separator => '&' }) @env["rack.input"].rewind end @env["rack.request.form_input"] = @env["rack.input"] @env["rack.request.form_hash"] else {} 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 @params ||= self.GET.merge(self.POST) rescue EOFError self.GET.dup 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. 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 @params = nil nil 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. def delete_param(k) v = [ self.POST.delete(k), self.GET.delete(k) ].compact.first @params = nil v end # shortcut for request.params[key] def [](key) params[key.to_s] end # 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. def []=(key, value) params[key.to_s] = value end # like Hash#values_at def values_at(*keys) keys.map{|key| params[key] } end # the referer of the client def referer @env['HTTP_REFERER'] end alias referrer referer def user_agent @env['HTTP_USER_AGENT'] end def cookies hash = @env["rack.request.cookie_hash"] ||= {} string = @env["HTTP_COOKIE"] return hash if string == @env["rack.request.cookie_string"] hash.clear # According to RFC 2109: # If multiple cookies satisfy the criteria above, they are ordered in # the Cookie header such that those with more specific Path attributes # precede those with less specific. Ordering with respect to other # attributes (e.g., Domain) is unspecified. cookies = Utils.parse_query(string, ';,') { |s| Rack::Utils.unescape(s) rescue s } cookies.each { |k,v| hash[k] = Array === v ? v.first : v } @env["rack.request.cookie_string"] = string hash end def xhr? @env["HTTP_X_REQUESTED_WITH"] == "XMLHttpRequest" end def base_url url = "#{scheme}://#{host}" url << ":#{port}" if port != DEFAULT_PORTS[scheme] url 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(@env["HTTP_ACCEPT_ENCODING"]) end def accept_language parse_http_accept_header(@env["HTTP_ACCEPT_LANGUAGE"]) end def trusted_proxy?(ip) ip =~ /\A127\.0\.0\.1\Z|\A(10|172\.(1[6-9]|2[0-9]|30|31)|192\.168)\.|\A::1\Z|\Afd[0-9a-f]{2}:.+|\Alocalhost\Z|\Aunix\Z|\Aunix:/i end def ip remote_addrs = split_ip_addresses(@env['REMOTE_ADDR']) remote_addrs = reject_trusted_ip_addresses(remote_addrs) return remote_addrs.first if remote_addrs.any? forwarded_ips = split_ip_addresses(@env['HTTP_X_FORWARDED_FOR']) return reject_trusted_ip_addresses(forwarded_ips).last || @env["REMOTE_ADDR"] end protected def split_ip_addresses(ip_addresses) ip_addresses ? ip_addresses.strip.split(/[,\s]+/) : [] end def reject_trusted_ip_addresses(ip_addresses) ip_addresses.reject { |ip| trusted_proxy?(ip) } end def parse_query(qs) d = '&' qs, d = qs[:query], qs[:separator] if Hash === qs Utils.parse_nested_query(qs, d) end def parse_multipart(env) Rack::Multipart.parse_multipart(env) end def parse_http_accept_header(header) header.to_s.split(/\s*,\s*/).map do |part| attribute, parameters = part.split(/\s*;\s*/, 2) quality = 1.0 if parameters and /\Aq=([\d.]+)/ =~ parameters quality = $1.to_f end [attribute, quality] end end private def strip_doublequotes(s) if s[0] == ?" && s[-1] == ?" s[1..-2] else s end end end end