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module Semantic
class LogSubscriber < ActiveSupport::LogSubscriber
include SemanticLogger::Loggable
include AnsiColors
# def logger = SemanticLogger['Rails']
INTERNAL_PARAMS = %i[controller action format _method only_path].freeze
def initialize(session_key)
@session_key = session_key
@transactions = {}
super()
end
def start_processing(event)
session_value = session_value(event)
@transactions[event.transaction_id] = session_value # preserve session_value to help finish_processing
SemanticLogger.tagged(session_value) do
request = event.payload[:request]
path = colorize(request.filtered_path, BOLD)
logger.info("Started #{request.raw_request_method} #{path}")
format = event.payload[:format]
format = format.to_s.upcase if format.is_a?(Symbol)
format = '*/*' if format.nil?
format = colorize(format, BOLD)
logger.debug("Processing by #{event.payload[:controller]}##{event.payload[:action]} as #{format}")
params = event.payload[:params].deep_symbolize_keys.except(*INTERNAL_PARAMS)
unless params.empty?
params = params.ai(ruby19_syntax: true, plain: true, multiline: false)
params.gsub!(/(\w+):/, "#{TEXT_CYAN}\\1#{CLEAR}:")
params.gsub!(/"(.*?)"/, "\"#{TEXT_YELLOW}\\1#{CLEAR}\"")
end
logger.debug("Parameters: #{params}") unless params.empty?
end
end
def finish_processing(event)
session_value = @transactions.delete(event.transaction_id) # get previous session_value from start_processing
SemanticLogger.tagged(session_value) do
payload = event.payload
additions = ActionController::Base.log_process_action(payload)
status = payload[:status]
if status.nil? && (exception_class_name = payload[:exception]&.first)
status = ActionDispatch::ExceptionWrapper.status_code_for_exception(exception_class_name)
end
additions << "GC: #{event.gc_time.round(1)}ms"
if event.duration >= 1200
logger.error process_duration(event, additions)
elsif event.duration >= 600
logger.warn process_duration(event, additions)
elsif event.duration >= 250
logger.info process_duration(event, additions)
elsif event.duration >= 80
logger.debug process_duration(event, additions)
end
logger.info("Completed #{colorize(status, BOLD)} #{Rack::Utils::HTTP_STATUS_CODES[status]}")
end
end
private
def session_value(event) = event.payload[:headers]['rack.session'].fetch(@session_key, nil)
def process_duration(event, additions) = "Processed in #{event.duration.round}ms (#{additions.join(' | ')})"
end
end