Class: RubyDNS::RuleBasedServer::Rule

Inherits:
Object
  • Object
show all
Defined in:
lib/rubydns/server.rb

Overview

Represents a single rule in the server.

Instance Method Summary collapse

Constructor Details

#initialize(pattern, callback) ⇒ Rule

Returns a new instance of Rule.



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# File 'lib/rubydns/server.rb', line 183

def initialize(pattern, callback)
	@pattern = pattern
	@callback = callback
end

Instance Method Details

#call(server, name, resource_class, transaction) ⇒ Object

Invoke the rule, if it matches the incoming request, it is evaluated and returns true, otherwise returns false.



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# File 'lib/rubydns/server.rb', line 202

def call(server, name, resource_class, transaction)
	unless match(name, resource_class)
		server.logger.debug "<#{transaction.query.id}> Resource class #{resource_class} failed to match #{@pattern[1].inspect}!"
		
		return false
	end
	
	# Does this rule match against the supplied name?
	case @pattern[0]
	when Regexp
		match_data = @pattern[0].match(name)
		
		if match_data
			server.logger.debug "<#{transaction.query.id}> Regexp pattern matched with #{match_data.inspect}."
			
			@callback[transaction, match_data]
			
			return true
		end
	when String
		if @pattern[0] == name
			server.logger.debug "<#{transaction.query.id}> String pattern matched."
			
			@callback[transaction]
			
			return true
		end
	else
		if (@pattern[0].call(name, resource_class) rescue false)
			server.logger.debug "<#{transaction.query.id}> Callable pattern matched."
			
			@callback[transaction]
			
			return true
		end
	end
	
	server.logger.debug "<#{transaction.query.id}> No pattern matched."
	
	# We failed to match the pattern.
	return false
end

#match(name, resource_class) ⇒ Object

Returns true if the name and resource_class are sufficient:



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# File 'lib/rubydns/server.rb', line 189

def match(name, resource_class)
	# If the pattern doesn't specify any resource classes, we implicitly pass this test:
	return true if @pattern.size < 2
	
	# Otherwise, we try to match against some specific resource classes:
	if Class === @pattern[1]
		@pattern[1] == resource_class
	else
		@pattern[1].include?(resource_class) rescue false
	end
end

#to_s ⇒ Object 



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# File 'lib/rubydns/server.rb', line 245

def to_s
	@pattern.inspect
end