class Net::IMAP::Config

Net::IMAP::Config stores configuration options for Net::IMAP clients. The global configuration can be seen at either Net::IMAP.config or Net::IMAP::Config.global, and the client-specific configuration can be seen at Net::IMAP#config.

When creating a new client, all unhandled keyword arguments to Net::IMAP.new are delegated to Config.new. Every client has its own config.

debug_client = Net::IMAP.new(hostname, debug: true)
quiet_client = Net::IMAP.new(hostname, debug: false)
debug_client.config.debug?  # => true
quiet_client.config.debug?  # => false

Inheritance¶ ↑

Configs have a parent config, and any attributes which have not been set locally will inherit the parent’s value. Every client creates its own specific config. By default, client configs inherit from Config.global.

plain_client = Net::IMAP.new(hostname)
debug_client = Net::IMAP.new(hostname, debug: true)
quiet_client = Net::IMAP.new(hostname, debug: false)

plain_client.config.inherited?(:debug)  # => true
debug_client.config.inherited?(:debug)  # => false
quiet_client.config.inherited?(:debug)  # => false

plain_client.config.debug?  # => false
debug_client.config.debug?  # => true
quiet_client.config.debug?  # => false

# Net::IMAP.debug is delegated to Net::IMAP::Config.global.debug
Net::IMAP.debug = true
plain_client.config.debug?  # => true
debug_client.config.debug?  # => true
quiet_client.config.debug?  # => false

Net::IMAP.debug = false
plain_client.config.debug = true
plain_client.config.inherited?(:debug)  # => false
plain_client.config.debug?  # => true
plain_client.config.reset(:debug)
plain_client.config.inherited?(:debug)  # => true
plain_client.config.debug?  # => false

Versioned defaults¶ ↑

The effective default configuration for a specific x.y version of net-imap can be loaded with the config keyword argument to Net::IMAP.new. Requesting default configurations for previous versions enables extra backward compatibility with those versions:

client = Net::IMAP.new(hostname, config: 0.3)
client.config.sasl_ir                  # => false
client.config.responses_without_block  # => :silence_deprecation_warning

client = Net::IMAP.new(hostname, config: 0.4)
client.config.sasl_ir                  # => true
client.config.responses_without_block  # => :silence_deprecation_warning

client = Net::IMAP.new(hostname, config: 0.5)
client.config.sasl_ir                  # => true
client.config.responses_without_block  # => :warn

client = Net::IMAP.new(hostname, config: :future)
client.config.sasl_ir                  # => true
client.config.responses_without_block  # => :raise

The versioned default configs inherit certain specific config options from Config.global, for example debug:

client = Net::IMAP.new(hostname, config: 0.4)
Net::IMAP.debug = false
client.config.debug?  # => false

Net::IMAP.debug = true
client.config.debug?  # => true

Use load_defaults to globally behave like a specific version:

client = Net::IMAP.new(hostname)
client.config.sasl_ir              # => true
Net::IMAP.config.load_defaults 0.3
client.config.sasl_ir              # => false

Named defaults¶ ↑

In addition to x.y version numbers, the following aliases are supported:

:default: An alias for :current.

NOTE: This is not the same as Config.default. It inherits some attributes from Config.global, for example: debug.
:current: An alias for the current x.y version’s defaults.
:next: The planned config for the next x.y version.
:future: The planned eventual config for some future x.y version.

For example, to raise exceptions for all current deprecations:

client = Net::IMAP.new(hostname, config: :future)
client.responses  # raises an ArgumentError

Thread Safety¶ ↑

NOTE: Updates to config objects are not synchronized for thread-safety.

Attributes

debug[RW]

The debug mode (boolean)

The default value is false.

enforce_logindisabled[RW]

Controls the behavior of Net::IMAP#login when the LOGINDISABLED capability is present. When enforced, Net::IMAP will raise a LoginDisabledError when that capability is present. Valid values are:

[false] Send the LOGIN command without checking for LOGINDISABLED.

[:when_capabilities_cached] Enforce the requirement when Net::IMAP#capabilities_cached? is true, but do not send a CAPABILITY command to discover the capabilities.

[true] Only send the LOGIN command if the LOGINDISABLED capability is not present. When capabilities are unknown, Net::IMAP will automatically send a CAPABILITY command first before sending LOGIN.

Starting with version	The default value is
original	‘false`
v0.5	‘true`

idle_response_timeout[RW]

Seconds to wait until an IDLE response is received, after the client asks to leave the IDLE state.

See Net::IMAP#idle and Net::IMAP#idle_done.

The default value is 5 seconds.

open_timeout[RW]

Seconds to wait until a connection is opened.

If the IMAP object cannot open a connection within this time, it raises a Net::OpenTimeout exception.

See Net::IMAP.new.

The default value is 30 seconds.

responses_without_block[RW]

Controls the behavior of Net::IMAP#responses when called without a block. Valid options are :warn, :raise, or :silence_deprecation_warning.

Starting with version	The default value is
v0.4.13	`:silence_deprecation_warning`
v0.5	`:warn`
eventually	`:raise`

sasl_ir[RW]

Whether to use the SASL-IR extension when the server and SASL mechanism both support it.

See Net::IMAP#authenticate.

Starting with version	The default value is
original	`false` (extension unsupported)
v0.4	`true` (support added)

Public Class Methods

Net::IMAP::Config[number] → versioned config click to toggle source

Net::IMAP::Config[symbol] → named config

Net::IMAP::Config[hash] → new frozen config

Net::IMAP::Config[config] → same config

Given a version number, returns the default configuration for the target version. See Versioned defaults at Config.

Given a version name, returns the default configuration for the target version. See Named defaults at Config.

Given a Hash, creates a new frozen config which inherits from Config.global. Use Config.new for an unfrozen config.

Given a config, returns that same config.

# File lib/net/imap/config.rb, line 151
def self.[](config)
  if    config.is_a?(Config)         then config
  elsif config.nil? && global.nil?   then nil
  elsif config.respond_to?(:to_hash) then new(global, **config).freeze
  else
    version_defaults.fetch(config) do
      case config
      when Numeric
        raise RangeError, "unknown config version: %p" % [config]
      when Symbol
        raise KeyError, "unknown config name: %p" % [config]
      else
        raise TypeError, "no implicit conversion of %s to %s" % [
          config.class, Config
        ]
      end
    end
  end
end

default click to toggle source

The default config, which is hardcoded and frozen.

# File lib/net/imap/config.rb, line 126
def self.default; @default end

global click to toggle source

The global config object. Also available from Net::IMAP.config.

# File lib/net/imap/config.rb, line 129
def self.global; @global if defined?(@global) end

new(parent = Config.global, **attrs) { |self| ... } click to toggle source

Creates a new config object and initialize its attribute with attrs.

If parent is not given, the global config is used by default.

If a block is given, the new config object is yielded to it.

Calls superclass method Net::IMAP::Config::AttrInheritance#new

# File lib/net/imap/config.rb, line 262
def initialize(parent = Config.global, **attrs)
  super(parent)
  update(**attrs)
  yield self if block_given?
end

version_defaults click to toggle source

A hash of hard-coded configurations, indexed by version number.

# File lib/net/imap/config.rb, line 132
def self.version_defaults; @version_defaults end

Public Instance Methods

debug? → boolean click to toggle source

Alias for debug

# File lib/net/imap/config.rb, line 180

load_defaults(version) → self click to toggle source

Resets the current config to behave like the versioned default configuration for version. parent will not be changed.

Some config attributes default to inheriting from their parent (which is usually Config.global) and are left unchanged, for example: debug.

See Versioned defaults at Config and Named defaults at Config.

# File lib/net/imap/config.rb, line 313
def load_defaults(version)
  [Numeric, Symbol, String].any? { _1 === version } or
    raise ArgumentError, "expected number or symbol, got %p" % [version]
  update(**Config[version].defaults_hash)
end

to_h → hash click to toggle source

Returns all config attributes in a hash.

# File lib/net/imap/config.rb, line 322
def to_h; data.members.to_h { [_1, send(_1)] } end

update(**attrs) → self click to toggle source

Assigns all of the provided attrs to this config, and returns self.

An ArgumentError is raised unless every key in attrs matches an assignment method on Config.

NOTE: update is not atomic. If an exception is raised due to an invalid attribute value, attrs may be partially applied.

# File lib/net/imap/config.rb, line 278
def update(**attrs)
  unless (bad = attrs.keys.reject { respond_to?(:"#{_1}=") }).empty?
    raise ArgumentError, "invalid config options: #{bad.join(", ")}"
  end
  attrs.each do send(:"#{_1}=", _2) end
  self
end

with(**attrs) → config click to toggle source

with(**attrs) {|config| } → result

Without a block, returns a new config which inherits from self. With a block, yields the new config and returns the block’s result.

If no keyword arguments are given, an ArgumentError will be raised.

If self is frozen, the copy will also be frozen.

# File lib/net/imap/config.rb, line 296
def with(**attrs)
  attrs.empty? and
    raise ArgumentError, "expected keyword arguments, none given"
  copy = new(**attrs)
  copy.freeze if frozen?
  block_given? ? yield(copy) : copy
end

Protected Instance Methods

defaults_hash click to toggle source

# File lib/net/imap/config.rb, line 326
def defaults_hash
  to_h.reject {|k,v| DEFAULT_TO_INHERIT.include?(k) }
end