Class: LogStash::Filters::Naxsi

Inherits:
Base
  • Object
show all
Defined in:
lib/logstash/filters/naxsi.rb

Instance Method Summary collapse

Instance Method Details

#filter(event) ⇒ Object 



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# File 'lib/logstash/filters/naxsi.rb', line 22

def filter(event)

  event_hash = event.to_hash()

  # Get all of your idN keys from the event
  ids = event_hash.keys.select { |a| /id\d+/ =~ a }

  ids.each do |id|

    new_event = LogStash::Event.new()

    # Copy all the keys that are not tied to the exceptions
    event_hash.keys.each do |key|
      next if /id\d+|score\d+|var_name\d+|zone\d+|cscore\d+/ =~ key
      new_event[key] = event[key]
    end

    exception_num = id[-1,1]

    new_event["exception_num"] = exception_num

    # Add the properties for the exception
    ["id","score","var_name","zone","cscore"].each do |prop|
      next unless event_hash.has_key?(prop + exception_num)
      new_event[prop] = event_hash[prop + exception_num]
    end

    # Create the new event
    yield new_event
  end

  # Cancel the original event
  event.cancel

  # filter_matched should go in the last line of our successful code
  filter_matched(event)
end

#register ⇒ Object 



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# File 'lib/logstash/filters/naxsi.rb', line 17

def register
  # Add instance variables
end