class GlobalSetting def self.register(key, default) define_singleton_method(key) do provider.lookup(key, default) end end VALID_SECRET_KEY ||= /^[0-9a-f]{128}$/ # this is named SECRET_TOKEN as opposed to SECRET_KEY_BASE # for legacy reasons REDIS_SECRET_KEY ||= 'SECRET_TOKEN' REDIS_VALIDATE_SECONDS ||= 30 # In Rails secret_key_base is used to encrypt the cookie store # the cookie store contains session data # Discourse also uses this secret key to digest user auth tokens # This method will # - use existing token if already set in ENV or discourse.conf # - generate a token on the fly if needed and cache in redis # - enforce rules about token format falling back to redis if needed def self.safe_secret_key_base if @safe_secret_key_base && @token_in_redis && (@token_last_validated + REDIS_VALIDATE_SECONDS) < Time.now @token_last_validated = Time.now token = $redis.without_namespace.get(REDIS_SECRET_KEY) if token.nil? $redis.without_namespace.set(REDIS_SECRET_KEY, @safe_secret_key_base) end end @safe_secret_key_base ||= begin token = secret_key_base if token.blank? || token !~ VALID_SECRET_KEY @token_in_redis = true @token_last_validated = Time.now token = $redis.without_namespace.get(REDIS_SECRET_KEY) unless token && token =~ VALID_SECRET_KEY token = SecureRandom.hex(64) $redis.without_namespace.set(REDIS_SECRET_KEY, token) end end if !secret_key_base.blank? && token != secret_key_base STDERR.puts "WARNING: DISCOURSE_SECRET_KEY_BASE is invalid, it was re-generated" end token end rescue Redis::CommandError => e @safe_secret_key_base = SecureRandom.hex(64) if e.message =~ /READONLY/ end def self.load_defaults default_provider = FileProvider.from(File.expand_path('../../../config/discourse_defaults.conf', __FILE__)) default_provider.keys.concat(@provider.keys).uniq.each do |key| default = default_provider.lookup(key, nil) instance_variable_set("@#{key}_cache", nil) define_singleton_method(key) do val = instance_variable_get("@#{key}_cache") unless val.nil? val == :missing ? nil : val else val = provider.lookup(key, default) if val.nil? val = :missing end instance_variable_set("@#{key}_cache", val) val == :missing ? nil : val end end end end def self.use_s3? (@use_s3 ||= begin s3_bucket && s3_region && ( s3_use_iam_profile || (s3_access_key_id && s3_secret_access_key) ) ? :true : :false end) == :true end def self.s3_bucket_name @s3_bucket_name ||= s3_bucket.downcase.split("/")[0] end # for testing def self.reset_s3_cache! @use_s3 = nil end def self.database_config hash = { "adapter" => "postgresql" } %w{ pool connect_timeout timeout socket host backup_host port backup_port username password replica_host replica_port }.each do |s| if val = self.send("db_#{s}") hash[s] = val end end hash["adapter"] = "postgresql_fallback" if hash["replica_host"] hostnames = [ hostname ] hostnames << backup_hostname if backup_hostname.present? hostnames << URI.parse(cdn_url).host if cdn_url.present? hash["host_names"] = hostnames hash["database"] = db_name hash["prepared_statements"] = !!self.db_prepared_statements { "production" => hash } end # For testing purposes def self.reset_redis_config! @config = nil end def self.redis_config @config ||= begin c = {} c[:host] = redis_host if redis_host c[:port] = redis_port if redis_port if redis_slave_host && redis_slave_port c[:slave_host] = redis_slave_host c[:slave_port] = redis_slave_port c[:connector] = DiscourseRedis::Connector end c[:password] = redis_password if redis_password.present? c[:db] = redis_db if redis_db != 0 c[:db] = 1 if Rails.env == "test" c.freeze end end def self.add_default(name, default) unless self.respond_to? name define_singleton_method(name) do default end end end class BaseProvider def self.coerce(setting) return setting == "true" if setting == "true" || setting == "false" return $1.to_i if setting.to_s.strip =~ /^([0-9]+)$/ setting end def resolve(current, default) BaseProvider.coerce( if current.present? current else default.present? ? default : nil end ) end end class FileProvider < BaseProvider attr_reader :data def self.from(file) if File.exists?(file) parse(file) end end def initialize(file) @file = file @data = {} end def read ERB.new(File.read(@file)).result().split("\n").each do |line| if line =~ /^\s*([a-z_]+[a-z0-9_]*)\s*=\s*(\"([^\"]*)\"|\'([^\']*)\'|[^#]*)/ @data[$1.strip.to_sym] = ($4 || $3 || $2).strip end end end def lookup(key, default) var = @data[key] resolve(var, var.nil? ? default : "") end def keys @data.keys end def self.parse(file) provider = self.new(file) provider.read provider end private_class_method :parse end class EnvProvider < BaseProvider def lookup(key, default) var = ENV["DISCOURSE_" << key.to_s.upcase] resolve(var , var.nil? ? default : nil) end def keys ENV.keys.select { |k| k =~ /^DISCOURSE_/ }.map { |k| k[10..-1].downcase.to_sym } end end class BlankProvider < BaseProvider def lookup(key, default) default end def keys [] end end class << self attr_accessor :provider end def self.configure! if Rails.env == "test" @provider = BlankProvider.new else @provider = FileProvider.from(File.expand_path('../../../config/discourse.conf', __FILE__)) || EnvProvider.new end end end