Class: Fluent::GeoipOutput

Inherits:
BufferedOutput
  • Object
show all
Includes:
HandleTagNameMixin, Mixin::RewriteTagName, SetTagKeyMixin
Defined in:
lib/fluent/plugin/out_geoip.rb

Constant Summary collapse

REGEXP_JSON = 
/(^[\[\{].+[\]\}]$|^[\d\.\-]+$)/
REGEXP_PLACEHOLDER_SINGLE = 
/^\$\{(?<geoip_key>-?[^\[]+)\['(?<record_key>-?[^']+)'\]\}$/
REGEXP_PLACEHOLDER_SCAN = 
/(\$\{[^\}]+?\})/
GEOIP_KEYS = 
%w(city latitude longitude country_code3 country_code2 country_code country_name dma_code area_code region)

Instance Method Summary collapse

Constructor Details

#initialize ⇒ GeoipOutput

Returns a new instance of GeoipOutput.



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# File 'lib/fluent/plugin/out_geoip.rb', line 30

def initialize
  require 'geoip'
  require 'yajl'

  super
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_geoip.rb', line 37

def configure(conf)
  super

  @map = {}
  @geoip_lookup_key = @geoip_lookup_key.split(/\s*,\s*/)

  # enable_key_* format (legacy format)
  conf.keys.select{|k| k =~ /^enable_key_/}.each do |key|
    geoip_key = key.sub('enable_key_','')
    raise Fluent::ConfigError, "geoip: unsupported key #{geoip_key}" unless GEOIP_KEYS.include?(geoip_key)
    @geoip_lookup_key.zip(conf[key].split(/\s*,\s*/)).each do |lookup_field,record_key|
      if record_key.nil?
        raise Fluent::ConfigError, "geoip: missing value found at '#{key} #{lookup_field}'"
      end
      @map.store(record_key, "${#{geoip_key}['#{lookup_field}']}")
    end
  end
  if conf.keys.select{|k| k =~ /^enable_key_/}.size > 0
    log.warn "geoip: 'enable_key_*' config format is obsoleted. use <record></record> directive for now."
    log.warn "geoip: for further details referable to https://github.com/y-ken/fluent-plugin-geoip"
  end

  # <record></record> directive
  conf.elements.select { |element| element.name == 'record' }.each { |element|
    element.each_pair { |k, v|
      element.has_key?(k) # to suppress unread configuration warning
      @map[k] = v
      validate_json = Proc.new { 
        begin
          dummy_text = Yajl::Encoder.encode('dummy_text')
          Yajl::Parser.parse(v.gsub(REGEXP_PLACEHOLDER_SCAN, dummy_text))
        rescue Yajl::ParseError => e
          raise Fluent::ConfigError, "geoip: failed to parse '#{v}' as json."
        end
      }
      validate_json.call if v.match(REGEXP_JSON)
    }
  }
  @placeholder_keys = @map.values.join.scan(REGEXP_PLACEHOLDER_SCAN).map{ |placeholder| placeholder[0] }.uniq
  @placeholder_keys.each do |key|
    geoip_key = key.match(REGEXP_PLACEHOLDER_SINGLE)[:geoip_key]
    raise Fluent::ConfigError, "geoip: unsupported key #{geoip_key}" unless GEOIP_KEYS.include?(geoip_key)
  end
  @placeholder_expander = PlaceholderExpander.new

  if ( !@tag && !@remove_tag_prefix && !@remove_tag_suffix && !@add_tag_prefix && !@add_tag_suffix )
    raise Fluent::ConfigError, "geoip: required at least one option of 'tag', 'remove_tag_prefix', 'remove_tag_suffix', 'add_tag_prefix', 'add_tag_suffix'."
  end

  @geoip = GeoIP::City.new(@geoip_database, :memory, false)
end

#format(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_geoip.rb', line 93

def format(tag, time, record)
  [tag, time, record].to_msgpack
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/out_geoip.rb', line 97

def shutdown
  super
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/out_geoip.rb', line 89

def start
  super
end

#write(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_geoip.rb', line 101

def write(chunk)
  chunk.msgpack_each do |tag, time, record|
    Fluent::Engine.emit(tag, time, add_geoip_field(record))
  end
end