Class: Fluent::TextParser

Inherits:
Object
  • Object
show all
Defined in:
lib/fluent/parser.rb

Defined Under Namespace

Classes: ApacheParser, CSVParser, JSONParser, LabeledTSVParser, RegexpParser, TSVParser, ValuesParser

Constant Summary collapse

TEMPLATE_FACTORIES = 
{
  'apache' => Proc.new { RegexpParser.new(/^(?<host>[^ ]*) [^ ]* (?<user>[^ ]*) \[(?<time>[^\]]*)\] "(?<method>\S+)(?: +(?<path>[^ ]*) +\S*)?" (?<code>[^ ]*) (?<size>[^ ]*)(?: "(?<referer>[^\"]*)" "(?<agent>[^\"]*)")?$/, {'time_format'=>"%d/%b/%Y:%H:%M:%S %z"}) },
  'apache2' => Proc.new { ApacheParser.new },
  'syslog' => Proc.new { RegexpParser.new(/^(?<time>[^ ]*\s*[^ ]* [^ ]*) (?<host>[^ ]*) (?<ident>[a-zA-Z0-9_\/\.\-]*)(?:\[(?<pid>[0-9]+)\])?[^\:]*\: *(?<message>.*)$/, {'time_format'=>"%b %d %H:%M:%S"}) },
  'json' => Proc.new { JSONParser.new },
  'tsv' => Proc.new { TSVParser.new },
  'ltsv' => Proc.new { LabeledTSVParser.new },
  'csv' => Proc.new { CSVParser.new },
  'nginx' => Proc.new { RegexpParser.new(/^(?<remote>[^ ]*) (?<host>[^ ]*) (?<user>[^ ]*) \[(?<time>[^\]]*)\] "(?<method>\S+)(?: +(?<path>[^\"]*) +\S*)?" (?<code>[^ ]*) (?<size>[^ ]*)(?: "(?<referer>[^\"]*)" "(?<agent>[^\"]*)")?$/,  {'time_format'=>"%d/%b/%Y:%H:%M:%S %z"}) },
}

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ TextParser

Returns a new instance of TextParser.



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# File 'lib/fluent/parser.rb', line 246

def initialize
  @parser = nil
end

Class Method Details

.register_template(name, regexp_or_proc, time_format = nil) ⇒ Object 



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# File 'lib/fluent/parser.rb', line 235

def self.register_template(name, regexp_or_proc, time_format=nil)
  if regexp_or_proc.is_a?(Regexp)
    regexp = regexp_or_proc
    factory = Proc.new { RegexpParser.new(regexp, {'time_format'=>time_format}) }
  else
    factory = regexp_or_proc
  end

  TEMPLATE_FACTORIES[name] = factory
end

Instance Method Details

#configure(conf, required = true) ⇒ Object 



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# File 'lib/fluent/parser.rb', line 250

def configure(conf, required=true)
  format = conf['format']

  if format == nil
    if required
      raise ConfigError, "'format' parameter is required"
    else
      return nil
    end
  end

  if format[0] == ?/ && format[format.length-1] == ?/
    # regexp
    begin
      regexp = Regexp.new(format[1..-2])
      if regexp.named_captures.empty?
        raise "No named captures"
      end
    rescue
      raise ConfigError, "Invalid regexp '#{format[1..-2]}': #{$!}"
    end

    @parser = RegexpParser.new(regexp)

  else
    # built-in template
    factory = TEMPLATE_FACTORIES[format]
    unless factory
      raise ConfigError, "Unknown format template '#{format}'"
    end
    @parser = factory.call
  end

  if @parser.respond_to?(:configure)
    @parser.configure(conf)
  end

  return true
end

#parse(text) ⇒ Object 



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# File 'lib/fluent/parser.rb', line 290

def parse(text)
  return @parser.call(text)
end