Parse rails log and generate structured data

parse-rails-log.rb

require "json"

requests = {}
File.open("production.log").each_line do |ln|
  if ln =~ /^\[([0-9a-f]+)\] (.+)/
    id = $1
    msg = $2
    requests[id] ||= {lines: []}
    requests[id][:lines] << msg
    if msg =~ /Processing by (.+) as/
      requests[id][:controller] = $1
    end
    if msg =~ /Started .+ for ([\d\.]+) at (.+)$/
      requests[id][:ip] = $1
      requests[id][:time] = $2
    end
    #if msg =~ /chain halted as/
      #requests[id][:halted] = true
    #end
    #if msg =~ /CSRF token authenticity/
      #requests[id][:csrf] = true
    #end
  end
end

File.open("requests.txt", "w") do |f|
  f.write(JSON.pretty_generate(requests))
end