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config.rb
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config.rb
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# frozen_string_literal: true
require "openssl"
require "uri"
class RedisClient
class Config
DEFAULT_TIMEOUT = 1.0
DEFAULT_HOST = "localhost"
DEFAULT_PORT = 6379
DEFAULT_USERNAME = "default"
DEFAULT_DB = 0
module Common
attr_reader :db, :password, :id, :ssl, :ssl_params, :command_builder, :inherit_socket,
:connect_timeout, :read_timeout, :write_timeout, :driver, :connection_prelude, :protocol,
:middlewares_stack, :custom, :circuit_breaker
alias_method :ssl?, :ssl
def initialize(
username: nil,
password: nil,
db: nil,
id: nil,
timeout: DEFAULT_TIMEOUT,
read_timeout: timeout,
write_timeout: timeout,
connect_timeout: timeout,
ssl: nil,
custom: {},
ssl_params: nil,
driver: nil,
protocol: 3,
client_implementation: RedisClient,
command_builder: CommandBuilder,
inherit_socket: false,
reconnect_attempts: false,
middlewares: false,
circuit_breaker: nil
)
@username = username
@password = password
@db = begin
Integer(db || DEFAULT_DB)
rescue ArgumentError
raise ArgumentError, "db: must be an Integer, got: #{db.inspect}"
end
@id = id
@ssl = ssl || false
@ssl_params = ssl_params
@connect_timeout = connect_timeout
@read_timeout = read_timeout
@write_timeout = write_timeout
@driver = driver ? RedisClient.driver(driver) : RedisClient.default_driver
@custom = custom
@client_implementation = client_implementation
@protocol = protocol
unless protocol == 2 || protocol == 3
raise ArgumentError, "Unknown protocol version #{protocol.inspect}, expected 2 or 3"
end
@command_builder = command_builder
@inherit_socket = inherit_socket
reconnect_attempts = Array.new(reconnect_attempts, 0).freeze if reconnect_attempts.is_a?(Integer)
@reconnect_attempts = reconnect_attempts
@connection_prelude = build_connection_prelude
circuit_breaker = CircuitBreaker.new(**circuit_breaker) if circuit_breaker.is_a?(Hash)
if @circuit_breaker = circuit_breaker
middlewares = [CircuitBreaker::Middleware] + (middlewares || [])
end
middlewares_stack = Middlewares
if middlewares && !middlewares.empty?
middlewares_stack = Class.new(Middlewares)
middlewares.each do |mod|
middlewares_stack.include(mod)
end
end
@middlewares_stack = middlewares_stack
end
def username
@username || DEFAULT_USERNAME
end
def resolved?
true
end
def sentinel?
false
end
def new_pool(**kwargs)
kwargs[:timeout] ||= DEFAULT_TIMEOUT
Pooled.new(self, **kwargs)
end
def new_client(**kwargs)
@client_implementation.new(self, **kwargs)
end
def retry_connecting?(attempt, _error)
if @reconnect_attempts
if (pause = @reconnect_attempts[attempt])
if pause > 0
sleep(pause)
end
return true
end
end
false
end
def ssl_context
if ssl
@ssl_context ||= @driver.ssl_context(@ssl_params || {})
end
end
def server_url
if path
url = "unix://#{path}"
if db != 0
url = "#{url}?db=#{db}"
end
else
# add brackets to IPv6 address
redis_host = if host.count(":") >= 2
"[#{host}]"
else
host
end
url = "redis#{'s' if ssl?}://#{redis_host}:#{port}"
if db != 0
url = "#{url}/#{db}"
end
end
url
end
private
def build_connection_prelude
prelude = []
if protocol == 3
prelude << if @password
["HELLO", "3", "AUTH", @username || DEFAULT_USERNAME, @password]
else
["HELLO", "3"]
end
elsif @password
prelude << if @username && !@username.empty?
["AUTH", @username, @password]
else
["AUTH", @password]
end
end
if @db && @db != 0
prelude << ["SELECT", @db.to_s]
end
# Deep freeze all the strings and commands
prelude.map! do |commands|
commands = commands.map { |str| str.frozen? ? str : str.dup.freeze }
commands.freeze
end
prelude.freeze
end
end
include Common
attr_reader :host, :port, :path
def initialize(
url: nil,
host: nil,
port: nil,
path: nil,
username: nil,
password: nil,
**kwargs
)
if url
url_config = URLConfig.new(url)
kwargs = {
ssl: url_config.ssl?,
db: url_config.db,
}.compact.merge(kwargs)
host ||= url_config.host
port ||= url_config.port
path ||= url_config.path
username ||= url_config.username
password ||= url_config.password
end
super(username: username, password: password, **kwargs)
if @path = path
@host = nil
@port = nil
else
@host = host || DEFAULT_HOST
@port = Integer(port || DEFAULT_PORT)
end
end
end
end