Class: ActiveDirectory::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/active_directory/base.rb

Overview

Base class for all Ruby/ActiveDirectory Entry Objects (like User and Group)

Direct Known Subclasses

Computer, Group, User

Constant Summary collapse

NIL_FILTER =

A Net::LDAP::Filter object that doesn’t do any filtering (outside of check that the CN attribute is present. This is used internally for specifying a ‘no filter’ condition for methods that require a filter object.

Net::LDAP::Filter.pres('cn')
@@ldap = 
nil

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(attributes = {}) ⇒ Base

FIXME: Need to document the Base::new



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# File 'lib/active_directory/base.rb', line 372

def initialize(attributes = {}) # :nodoc:
	if attributes.is_a? Net::LDAP::Entry
		@entry = attributes
		@attributes = {}
	else
		@entry = nil
		@attributes = attributes
	end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, args = []) ⇒ Object

:nodoc:



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# File 'lib/active_directory/base.rb', line 382

def method_missing(name, args = []) # :nodoc:
	name_s = name.to_s.downcase
	name = name_s.to_sym
	if name_s[-1,1] == '='
		@attributes[name_s[0,name_s.size-1].to_sym] = args
	else
		if @attributes.has_key?(name)
			return @attributes[name]
		elsif @entry
			begin
				value = @entry.send(name)
				value = value.first if value.kind_of?(Array) && value.size == 1
				value = value.to_s if value.nil? || value.size == 1
				return value
			rescue NoMethodError
				return nil
			end
		else
			super
		end
	end
end

Class Method Details

.create(dn, attributes) ⇒ Object

Create a new entry in the Active Record store.

dn is the Distinguished Name for the new entry. This must be a unique identifier, and can be passed as either a Container or a plain string.

attributes is a symbol-keyed hash of attribute_name => value pairs.



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# File 'lib/active_directory/base.rb', line 299

def self.create(dn,attributes)
	return nil if dn.nil? || attributes.nil?
	begin
		attributes.merge!(required_attributes)
		if @@ldap.add(:dn => dn.to_s, :attributes => attributes)
			return find_by_distinguishedName(dn.to_s)
		else
			return nil
		end
	rescue
		return nil
	end
end

.error ⇒ Object 



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# File 'lib/active_directory/base.rb', line 71

def self.error
	"#{@@ldap.get_operation_result.code}: #{@@ldap.get_operation_result.message}"
end

.exists?(filter_as_hash) ⇒ Boolean

Check to see if any entries matching the passed criteria exists.

Filters should be passed as a hash of attribute_name => expected_value, like:

User.exists?(
  :sn => 'Hunt',
  :givenName => 'James'
)

which will return true if one or more User entries have an sn (surname) of exactly ‘Hunt’ and a givenName (first name) of exactly ‘James’.

Partial attribute matches are available. For instance,

Group.exists?(
  :description => 'OldGroup_*'
)

would return true if there are any Group objects in Active Directory whose descriptions start with OldGroup_, like OldGroup_Reporting, or OldGroup_Admins.

Note that the * wildcard matches zero or more characters, so the above query would also return true if a group named ‘OldGroup_’ exists.

Returns:

  • (Boolean) 


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# File 'lib/active_directory/base.rb', line 112

def self.exists?(filter_as_hash)
	criteria = make_filter_from_hash(filter_as_hash) & filter
	(@@ldap.search(:filter => criteria).size > 0)
end

.filter ⇒ Object

:nodoc:



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# File 'lib/active_directory/base.rb', line 75

def self.filter # :nodoc:
	NIL_FILTER 
end

.find(*args) ⇒ Object

Performs a search on the Active Directory store, with similar syntax to the Rails ActiveRecord#find method.

The first argument passed should be either :first or :all, to indicate that we want only one (:first) or all (:all) results back from the resultant set.

The second argument should be a hash of attribute_name => expected_value pairs.

User.find(:all, :sn => 'Hunt')

would find all of the User objects in Active Directory that have a surname of exactly ‘Hunt’. As with the Base.exists? method, partial searches are allowed.

This method always returns an array if the caller specifies :all for the search type (first argument). If no results are found, the array will be empty.

If you call find(:first, …), you will either get an object (a User or a Group) back, or nil, if there were no entries matching your filter.



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# File 'lib/active_directory/base.rb', line 162

def self.find(*args)
	options = {
		:filter => NIL_FILTER,
		:in => ''
	}
	options.merge!(:filter => args[1]) unless args[1].nil?
	options[:in] = [ options[:in].to_s, @@settings[:base] ].delete_if { |part| part.empty? }.join(",")
	if options[:filter].is_a? Hash
		options[:filter] = make_filter_from_hash(options[:filter])
	end
	options[:filter] = options[:filter] & filter unless self.filter == NIL_FILTER
	
	if (args.first == :all)
		find_all(options)
	elsif (args.first == :first)
		find_first(options)
	else
		raise ArgumentError, 'Invalid specifier (not :all, and not :first) passed to find()'
	end
end

.find_all(options) ⇒ Object 



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# File 'lib/active_directory/base.rb', line 183

def self.find_all(options)
	results = []
	@@ldap.search(:filter => options[:filter], :base => options[:in], :return_result => false) do |entry|
		results << new(entry)
	end
	results
end

.find_first(options) ⇒ Object 



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# File 'lib/active_directory/base.rb', line 191

def self.find_first(options)
	@@ldap.search(:filter => options[:filter], :base => options[:in], :return_result => false) do |entry|
		return new(entry)
	end
end

.make_filter_from_hash(filter_as_hash) ⇒ Object

:nodoc:



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# File 'lib/active_directory/base.rb', line 125

def self.make_filter_from_hash(filter_as_hash) # :nodoc:
	return NIL_FILTER if filter_as_hash.nil? || filter_as_hash.empty?
	keys = filter_as_hash.keys

	first_key = keys.delete(keys[0])
	f = Net::LDAP::Filter.eq(first_key, filter_as_hash[first_key].to_s)
	keys.each do |key|
		f = f & Net::LDAP::Filter.eq(key, filter_as_hash[key].to_s)
	end
	f
end

.method_missing(name, *args) ⇒ Object

:nodoc:



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# File 'lib/active_directory/base.rb', line 197

def self.method_missing(name, *args) # :nodoc:
	name = name.to_s
	if (name[0,5] == 'find_')
		find_spec, attribute_spec = parse_finder_spec(name)
		raise ArgumentError, "find: Wrong number of arguments (#{args.size} for #{attribute_spec.size})" unless args.size == attribute_spec.size
		filters = {}
		[attribute_spec,args].transpose.each { |pr| filters[pr[0]] = pr[1] }
		find(find_spec, :filter => filters)
	else
		super name.to_sym, args
	end
end

.parse_finder_spec(method_name) ⇒ Object

:nodoc:



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# File 'lib/active_directory/base.rb', line 210

def self.parse_finder_spec(method_name) # :nodoc:
	# FIXME: This is a prime candidate for a
	# first-class object, FinderSpec

	method_name = method_name.gsub(/^find_/,'').gsub(/^by_/,'first_by_')
	find_spec, attribute_spec = *(method_name.split('_by_'))
	find_spec = find_spec.to_sym
	attribute_spec = attribute_spec.split('_and_').collect { |s| s.to_sym }

	return find_spec, attribute_spec
end

.required_attributes ⇒ Object

:nodoc:



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# File 'lib/active_directory/base.rb', line 79

def self.required_attributes # :nodoc:
	{}
end

.setup(settings) ⇒ Object

Configures the connection for the Ruby/ActiveDirectory library.

For example:

ActiveDirectory::Base.setup(
  :host => 'domain_controller1.example.org',
  :port => 389,
  :base => 'dc=example,dc=org',
  :auth => {
    :username => '[email protected]',
    :password => 'querying_users_password'
  }
)

This will configure Ruby/ActiveDirectory to connect to the domain controller at domain_controller1.example.org, using port 389. The domain’s base LDAP dn is expected to be ‘dc=example,dc=org’, and Ruby/ActiveDirectory will try to bind as the [email protected] user, using the supplied password.

Currently, there can be only one active connection per execution context.

For more advanced options, refer to the Net::LDAP.new documentation.



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# File 'lib/active_directory/base.rb', line 66

def self.setup(settings)
	@@settings = settings
	@@ldap = Net::LDAP.new(settings)
end

Instance Method Details

#==(other) ⇒ Object

:nodoc:



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# File 'lib/active_directory/base.rb', line 222

def ==(other) # :nodoc:
	return false if other.nil?
	other.distinguishedName == distinguishedName
end

#changed? ⇒ Boolean

Whether or not the entry has local changes that have not yet been replicated to the Active Directory server via a call to Base#save

Returns:

  • (Boolean) 


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# File 'lib/active_directory/base.rb', line 121

def changed?
	!@attributes.empty?
end

#destroy ⇒ Object

Deletes the entry from the Active Record store and returns true if the operation was successfully.



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# File 'lib/active_directory/base.rb', line 317

def destroy
	return false if new_record?

	if @@ldap.delete(:dn => distinguishedName)
		@entry = nil
		@attributes = {}
		return true
	else
		return false
	end
end

#move(new_rdn) ⇒ Object

This method may one day provide the ability to move entries from container to container. Currently, it does nothing, as we are waiting on the Net::LDAP folks to either document the Net::LDAP#modrdn method, or provide a similar method for moving / renaming LDAP entries.



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# File 'lib/active_directory/base.rb', line 349

def move(new_rdn)
	return false if new_record?
	puts "Moving #{distinguishedName} to RDN: #{new_rdn}"

	settings = @@settings.dup
	settings[:port] = 636
	settings[:encryption] = { :method => :simple_tls }

	ldap = Net::LDAP.new(settings)

	if ldap.rename(
		:olddn => distinguishedName,
		:newrdn => new_rdn,
		:delete_attributes => false
	)
		return true
	else
		puts Base.error
		return false
	end
end

#new_record? ⇒ Boolean

Returns true if this entry does not yet exist in Active Directory.

Returns:

  • (Boolean) 


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# File 'lib/active_directory/base.rb', line 230

def new_record?
	@entry.nil?
end

#reload ⇒ Object

Refreshes the attributes for the entry with updated data from the domain controller.



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# File 'lib/active_directory/base.rb', line 238

def reload
	return false if new_record?

	@entry = @@ldap.search(:filter => Net::LDAP::Filter.eq('distinguishedName',distinguishedName))[0]
	return !@entry.nil?
end

#save ⇒ Object

Saves any pending changes to the entry by updating the remote entry.



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# File 'lib/active_directory/base.rb', line 333

def save
	if update_attributes(@attributes)
		@attributes = {}
		return true
	else
		return false
	end
end

#update_attribute(name, value) ⇒ Object

Updates a single attribute (name) with one or more values (value), by immediately contacting the Active Directory server and initiating the update remotely.

Entries are always reloaded (via Base.reload) after calling this method.



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# File 'lib/active_directory/base.rb', line 253

def update_attribute(name, value)
	update_attributes(name.to_s => value)
end

#update_attributes(attributes_to_update) ⇒ Object

Updates multiple attributes, like ActiveRecord#update_attributes. The updates are immediately sent to the server for processing, and the entry is reloaded after the update (if all went well).



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# File 'lib/active_directory/base.rb', line 262

def update_attributes(attributes_to_update)
	return true if attributes_to_update.empty?

	operations = []
	attributes_to_update.each do |attribute, values|
		if values.nil? || values.empty?
			operations << [ :delete, attribute, nil ]
		else
			values = [values] unless values.is_a? Array
			values = values.collect { |v| v.to_s }

			current_value = begin
				@entry.send(attribute)
			rescue NoMethodError
				nil
			end

			operations << [ (current_value.nil? ? :add : :replace), attribute, values ]
		end
	end

	@@ldap.modify(
		:dn => distinguishedName,
		:operations => operations
	) && reload
end