webserver-log-analyser/main.rb

116 lines
2.6 KiB
Ruby

# frozen_string_literal: true
require 'date'
require_relative 'utils/http_codes'
require_relative 'utils/date_for_humans'
logfile = File.open("teambuilder.pt.log")
data = logfile.read
lines = data.split("\n")
# Gets the IP address from the string
# Note: sometimes the function can fetch the UA version as an IP address
def get_line_ip(line)
pattern = /\b(?:\d{1,3}\.){3}\d{1,3}\b/
line.match(pattern)[0] if line.match(pattern)
end
# Returns the date in the current line
def get_line_date(line)
pattern = /\[(.*?)\]/
match = line.match(pattern)[0] if line.match(pattern)
# [12/Apr/2023:13:56:41 +0100] -> 12/Apr/2023:13:56:41 +0100
Date.parse(match.gsub("[", "").gsub("]", ""))
end
# Gets the HTTP status code of the given log line
def get_line_code(line)
pattern = /\s(\d{3})\s/
line.match(pattern)[1] if line.match(pattern)
end
# Gets the user agent of the given log line
def get_line_ua(line)
pattern = /"([^"]*)"$/
user_agent = line.match(pattern)[0] if line.match(pattern)
user_agent.gsub('"', '')
end
# Gets the number of times an IP contacted the site
def times_appeared_single(ips, ip_to_check)
counter = 0
ips.each do |ip|
if ip == ip_to_check
counter += 1
end
end
counter
end
# Returns all unique IPs in a given list of IP addresses with duplicates
def sort_unique_ip(ips)
seen_ips = {}
unique_ips = []
ips.each do |ip|
unless seen_ips[ip]
unique_ips << ip
seen_ips[ip] = true
end
end
unique_ips
end
visit_counter = {}
client_errors = {}
user_agents = {}
all_ips = []
lines.each do | line |
all_ips << get_line_ip(line)
end
unique_ips = sort_unique_ip(all_ips)
puts("There were a total of #{unique_ips.length} unique IPs who connected to our site.")
unique_ips.each do |ip|
visit_counter[ip] = times_appeared_single(all_ips, ip)
puts("IP #{ip} contacted our site #{times_appeared_single(all_ips, ip)} times.")
end
lines.each do |line|
ip = get_line_ip(line).to_s
code = get_line_code(line)
ua = get_line_ua(line)
if is_client_err?(code.to_i)
if client_errors[ip]
client_errors[ip] += 1
else
client_errors[ip] = 1
end
end
if user_agents[ua]
user_agents[ua] += 1
else
user_agents[ua] = 1
end
end
top_user_agents = user_agents.sort_by { |ua, count| -count }.first(5)
puts "Top 5 User-Agents contacting the site:"
top_user_agents.each do |ua, count|
puts "#{ua}: #{count} visits"
end
top_client_errors = client_errors.sort_by { |ip, count| -count }.first(5)
puts "Top 5 IPs with most client errors (400-499):"
top_client_errors.each do |ip, count|
puts "#{ip}: #{count} errors"
end