/
log_handler.cr
33 lines (26 loc) · 1015 Bytes
/
log_handler.cr
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# A handler that logs the request method, resource, status code, and
# the time used to execute the next handler, to the given `IO`.
class HTTP::LogHandler
include HTTP::Handler
# Initializes this handler to log to the given `IO`.
def initialize(@io : IO = STDOUT)
end
def call(context)
elapsed = Time.measure { call_next(context) }
elapsed_text = elapsed_text(elapsed)
@io.puts "#{context.request.method} #{context.request.resource} - #{context.response.status_code} (#{elapsed_text})"
rescue e
@io.puts "#{context.request.method} #{context.request.resource} - Unhandled exception:"
e.inspect_with_backtrace(@io)
raise e
end
private def elapsed_text(elapsed)
minutes = elapsed.total_minutes
return "#{minutes.round(2)}m" if minutes >= 1
seconds = elapsed.total_seconds
return "#{seconds.round(2)}s" if seconds >= 1
millis = elapsed.total_milliseconds
return "#{millis.round(2)}ms" if millis >= 1
"#{(millis * 1000).round(2)}µs"
end
end