`class LogSubscriber`

A Rails log subscriber which is compatible with Console::Logger. It receives events from ActiveSupport::Notifications and logs them to the console.

Definitions

`def process_action(event)`

Log an ActionController process_action event.

Includes the following fields:

subject: "process_action.action_controller"
controller: The name of the controller.
action: The action performed.
format: The format of the response.
method: The HTTP method of the request.
path: The path of the request.
status: The HTTP status code of the response.
view_runtime: The time spent rendering views in milliseconds.
db_runtime: The time spent querying the database in milliseconds.
location: The redirect location if any.
allocations: The number of allocations performed.
duration: The total time spent processing the request in milliseconds.

Implementation

def process_action(event)
	payload = event.payload.dup
	
	# This may contain sensitive information:
	params = payload.delete(:params)
	
	# These objects are not useful and may not serialize correctly:
	headers = payload.delete(:headers)
	request = payload.delete(:request)
	response = payload.delete(:response)
	
	if request and ip = request.remote_ip
		payload[:source_address] = ip
	end
	
	if response and headers = response.headers
		# Extract redirect location if any:
		location = response.headers['Location'] || response.headers['location']
		if location
			payload[:location] = location
		end
	end
	
	payload[:allocations] = event.allocations
	payload[:duration] = event.duration
	
	Console.logger.info(event.name, **payload)
end