Events

Tailor extends EventEmitter, so you can subscribe to events with tailor.on('eventName', callback).

Events may be used for logging and monitoring. Check perf/benchmark.js for an example of getting metrics from Tailor.

Top level events

• Client request received: start(request)
• Response started (headers flushed and stream connected to output): response(request, status, headers)
• Response ended (with the total size of response): end(request, contentSize)
• Error: error(request, error) in case an error from template (parsing,fetching) and primary error(socket/timeout/50x)
• Context Error: context:error(request, error) in case of an error fetching the context

Fragment events

• Request start: fragment:start(request, fragment.attributes)
• Response Start when headers received: fragment:response(request, fragment.attributes, status, headers)
• Response End (with response size): fragment:end(request, fragment.attributes, contentSize)
• Error: fragment:error(request, fragment.attributes, error) in case of socket error, timeout, 50x
• Fallback: fragment:fallback(request, fragment.attributes, error) in case of timeout/error from the fragment if the fallback-src is specified

Note: fragment:response, fragment:fallback and fragment:error are mutually exclusive. fragment:end happens only in case of successful response.