SRack

Hacky serverless function Rack handler to enable Sinatra apps in AWS Lambda.

Based on aws-samples/serverless-sinatra-sample

Installation

Add the following line to your Gemfile:

gem "srack"

Or just gem install srack.

Usage

Define your AWS Lambda function handler as the following:

require 'srack'

RACK_APP_CONFIG = "#{__dir__}/app/config.ru"

# Global object that responds to the call method. Stay outside of the handler
# to take advantage of container reuse
$app ||= Rack::Builder.parse_file(RACK_APP_CONFIG)
ENV['RACK_ENV'] ||= 'production'

def handler(event:, context:)
  SRack::AWSLambdaHandler
    .new($app)
    .handle(event:   event,
            context: context)
end

Then create a deployment zip with your AWS Lambda function and its dependencies.

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/nomadium/srack. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the SRack project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.