padle

PADLE - PArser Description LanguagE

A simple logfile parser that generates the parser from a grammar.

Usage

var padle = require('padle');
 
var grammar = 'parser p_test { csv( columns("date", "time", "timezone", "pid", "log") delimiter(" ") ); };';
var parser = new padle(grammar);
 
var parts = parser.parse("2015-01-01 11:13:23 PST [123] Debug log");

Parses the log into:

{
  "date": "2015-01-01",
  "time": "11:13:23",
  "timezone": "PST",
  "log": "Debug log"
}

Parser Grammar

The grammar is broken into parts:

parser p_test {
  csv(
    columns("a", "b", "c")
    delimiter(",")
  );
};

parser denotes a parser definition, followed by the name of the parser.

csv is the type of parser (currently only csv is implemented).

columns is a list of columns to be parsed out.

delimiter is the delimiter to split on.