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.



171
172
173
174
 
# File 'lib/rubydns/server.rb', line 171

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.



190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
 
# File 'lib/rubydns/server.rb', line 190

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:



177
178
179
180
181
182
183
184
185
186
187
 
# File 'lib/rubydns/server.rb', line 177

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 



233
234
235
 
# File 'lib/rubydns/server.rb', line 233

def to_s
	@pattern.inspect
end