discourse/plugins/discourse-nginx-performance.../lib/log_analyzer.rb

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class LogAnalyzer
class LineParser
# log_format log_discourse '[$time_local] "$http_host" $remote_addr "$request" "$http_user_agent" "$sent_http_x_discourse_route" $status $bytes_sent "$http_referer" $upstream_response_time $request_time "$sent_http_x_discourse_username"';
attr_accessor :time, :ip_address, :url, :route, :user_agent, :rails_duration, :total_duration,
:username, :status, :bytes_sent, :referer
PATTERN = /\[(.*)\](?: ".*")? (\S+) \"(.*)\" \"(.*)\" \"(.*)\" ([0-9]+) ([0-9]+) \"(.*)\" ([0-9.]+) ([0-9.]+) "(.*)"/
TIME_FORMAT = "%d/%b/%Y:%H:%M:%S %Z"
def self.parse(line)
result = new
_, result.time, result.ip_address, result.url, result.user_agent,
result.route, result.status, result.bytes_sent, result.referer,
result.rails_duration, result.total_duration, result.username = line.match(PATTERN).to_a
result.rails_duration = result.rails_duration.to_f
result.total_duration = result.total_duration.to_f
verb = result.url[0..3] if result.url
if verb && verb == "POST"
result.route += " (POST)"
end
if verb && verb == "PUT"
result.route += " (PUT)"
end
result.url = self.sanitize_url(result.url) if result.url
result
end
def is_mobile?
user_agent =~ /Mobile|Android|webOS/ && !(user_agent =~ /iPad|Nexus (7|10)/)
end
def parsed_time
DateTime.strptime(time, TIME_FORMAT) if time
end
private
def self.sanitize_url(url)
url.gsub(/api_key=([\w.\-]+)/, 'api_key=[FILTERED]')
end
end
attr_reader :total_requests, :message_bus_requests, :filenames,
:ip_to_rails_duration, :username_to_rails_duration,
:route_to_rails_duration, :url_to_rails_duration,
:status_404_to_count, :from_time, :to_time
def self.analyze(filenames, args)
new(filenames, args).analyze
end
class Aggeregator
attr_accessor :aggregate_type
def initialize
@data = {}
@aggregate_type = :duration
end
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def add(id, duration, aggregate = nil)
ary = (@data[id] ||= [0, 0])
ary[0] += duration
ary[1] += 1
unless aggregate.nil?
ary[2] ||= Hash.new(0)
if @aggregate_type == :duration
ary[2][aggregate] += duration
elsif @aggregate_type == :count
ary[2][aggregate] += 1
end
end
end
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def top(n, aggregator_formatter = nil)
@data.sort { |a, b| b[1][0] <=> a[1][0] }.first(n).map do |metric, ary|
metric = metric.to_s
metric = "[empty]" if metric.length == 0
result = [metric, ary[0], ary[1]]
# handle aggregate
if ary[2]
if aggregator_formatter
result.push aggregator_formatter.call(ary[2], ary[0], ary[1])
else
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result.push ary[2].sort { |a, b| b[1] <=> a[1] }.first(5).map { |k, v|
v = "%.2f" % v if Float === v
"#{k}(#{v})"}.join(" ")
end
end
result
end
end
end
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def initialize(filenames, args = {})
@filenames = filenames
@ip_to_rails_duration = Aggeregator.new
@username_to_rails_duration = Aggeregator.new
@route_to_rails_duration = Aggeregator.new
@route_to_rails_duration.aggregate_type = :count
@url_to_rails_duration = Aggeregator.new
@status_404_to_count = Aggeregator.new
@total_requests = 0
@message_bus_requests = 0
@limit = args[:limit]
end
def analyze
now = DateTime.now
@filenames.each do |filename|
File.open(filename).each_line do |line|
@total_requests += 1
parsed = LineParser.parse(line)
next unless parsed.time
next if @limit && ((now - parsed.parsed_time) * 24 * 60).to_i > @limit
@from_time ||= parsed.time
@to_time = parsed.time
if parsed.url =~ /(POST|GET) \/message-bus/
@message_bus_requests += 1
next
end
@ip_to_rails_duration.add(parsed.ip_address, parsed.rails_duration)
username = parsed.username == "-" ? "[Anonymous]" : parsed.username
@username_to_rails_duration.add(username, parsed.rails_duration, parsed.route)
@route_to_rails_duration.add(parsed.route, parsed.rails_duration, parsed.is_mobile? ? "mobile" : "desktop")
@url_to_rails_duration.add(parsed.url, parsed.rails_duration)
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@status_404_to_count.add(parsed.url, 1) if parsed.status == "404"
end
end
self
end
end