Class: LogStash::Filters::CSV

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

Overview

The CSV filter takes an event field containing CSV data, parses it, and stores it as individual fields (can optionally specify the names). This filter can also parse data with any separator, not just commas.

Instance Method Summary collapse

Instance Method Details

#filter(event) ⇒ Object 



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# File 'lib/logstash/filters/csv.rb', line 47

def filter(event)
  

  @logger.debug("Running csv filter", :event => event)

  matches = 0

  if event[@source]
    if event[@source].is_a?(String)
      event[@source] = [event[@source]]
    end

    if event[@source].length > 1
      @logger.warn("csv filter only works on fields of length 1",
                   :source => @source, :value => event[@source],
                   :event => event)
      return
    end

    raw = event[@source].first
    begin
      values = CSV.parse_line(raw, :col_sep => @separator, :quote_char => @quote_char)

      if @target.nil?
        # Default is to write to the root of the event.
        dest = event
      else
        dest = event[@target] ||= {}
      end

      values.each_index do |i|
        field_name = @columns[i] || "column#{i+1}"
        dest[field_name] = values[i]
      end

      filter_matched(event)
    rescue => e
      event.tag "_csvparsefailure"
      @logger.warn("Trouble parsing csv", :source => @source, :raw => raw,
                    :exception => e)
      return
    end # begin
  end # if event

  @logger.debug("Event after csv filter", :event => event)

end

#register ⇒ Object 



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# File 'lib/logstash/filters/csv.rb', line 40

def register

  # Nothing to do here

end