Docs on Advanced Usage & Configs

[metaskills]

Now that we have Lamby v4, with various Rack handler and proc configs, we should document them all in one place. Will do this on the new site. Will also cover some DIY escape hatches if Lamby.cmd does not work for you.

require_relative 'config/environment'
$app = Rack::Builder.new { run Rails.application }.to_app
def handler(event:, context:)
  Lamby.handler $app, event, context, rack: :http
end

[metaskills]

Demonstrate how stuff like this from an app.rb example file would look:

$app = Rack::Builder.new do
  map '/robots.txt' do
    response = File.read("public/deny.txt")
    run ->(_env) { [200, { 'Content-Type' => 'text/plain' }, [response]] }
  end
  map ENV['RAILS_RELATIVE_URL_ROOT'] do
    run Rails.application
  end
end.to_app
LambdaPunch.start_server!

def handler(event:, context:)
  Lamby.handler $app, event, context, rack: :http
ensure
  LambdaPunch.push { NewRelic::Agent.agent.flush_pipe_data }
  LambdaPunch.handled!(context)
end