Redirection parser

rediparser.rb

LOG_FILENAME = 'heroku-logs'
REQUEST_START_REGEX = /(.+)Started (.+) \"(.+)\"/
REDIRECT_REGEX = /(.+)Redirected to (.+barkibu.com)(.+)/

log_lines = File.readlines(LOG_FILENAME)

redirects = []
last_request = {}

log_lines.each do |line|
  line.match(REQUEST_START_REGEX) do |match_data|
    last_request = { method: match_data[2], url: match_data[3]}
    next
  end

  line.match(REDIRECT_REGEX) do |match_data|
    redirect_url = match_data[3]

    if redirects.any? && (redirects.last.last == last_request[:url])
      redirects.last << redirect_url
    else
      redirects << [last_request[:url], redirect_url]
    end
  end
end

def print_url(url, deepness)
  prefix = "#{'>' * 4 * deepness} " if deepness > 0
  puts "#{prefix}#{url}"
end

redirects.each do |redirect|
  redirect.each_with_index do |url, index|
    print_url url, index
  end

  puts
end