Sha256: 2549f4b97bc29a33e244360391db29bde9c65a28d352a22576ec3cc55eaa2724
Contents?: true
Size: 1.03 KB
Versions: 38
Compression:
Stored size: 1.03 KB
Contents
class GrokConverter
def load_patterns(dir = nil)
@patterns = {}
dir ||= Rails.root.join("vendor/patterns")
Dir.glob("#{dir}/*").each do |file|
File.read(file).split("\n").each do |line|
line.strip!
next if line == ""
next if line.start_with?("#")
name, pattern = line.split(/\s+/, 2)
next unless pattern
@patterns[name] = pattern
end
end
end
def convert_to_regexp(pattern)
limit = 100
expanded = pattern.dup
while m = expanded.match(/%{(.*?)(?::(.*?))?}/) # %{key:name} or #{key}
all, key, name = *m
if name
expanded = expanded.gsub(all, "(?<#{name}>#{@patterns[key]})")
else
expanded = expanded.gsub(all, @patterns[key])
end
limit -= 1
break if limit == 0
end
Regexp.new expanded
end
end
=begin
g = GrokConverter.new
g.load_patterns("vendor/patterns")
p g.convert_to_regexp("%{USERNAME:user} %{NOT_EXISTS:foo} %{USER} aaaa")
# => /(?<user>[a-zA-Z0-9._-]+) (?<foo>) [a-zA-Z0-9._-]+ aaaa/
=end
Version data entries
38 entries across 38 versions & 1 rubygems