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Version: 0.12

grok

The grok extractor is useful for parsing unstructured data into a structured form. It is based on logstash's grok plugin. Grok uses regular expressions, so any regular expression can be used as a grok pattern.

Grok pattern is of the form %{SYNTAX : SEMANTIC} where SYNTAX is the name of the pattern that matches the text and SEMANTIC is the identifier

Predicate​

When used with ~, the predicate passes if the target matches the pattern passed by the input (fetched from the grok pattern's file).

Extraction​

If the predicate passes, the extractor returns the matches found when the target was matched to the pattern.

Example​

match { "meta": "55.3.244.1 GET /index.html 15824 0.043" } of
  case rp = %{ meta ~= grok |%{IP:client} %{WORD:method} %{URIPATHPARAM:request} %{NUMBER:bytes} %{NUMBER:duration} | } => rp
  default => "no match"
end;