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