Rack middleware tutorial

Lesson 1

Create a simple rack app with rspec-tests and github actions

Lesson 2

Add to rack application middlewares:

1. that will log the request
2. handle a unexpected exception
3. handle responses 404, 500
4. handle requset to public assets Assets must be in the public folder "lib/public/assets" Example request:

http://localhost:9292/public/xml_file.xml

Lesson 3

Add to rack application cache-control(only for assets) and etag middleware

Lesson 4

Create simple dsl for routing, methods get, post and mount to another rack app

Run

1. Ensure docker and docker compose is alredy installed in a computer.
2. Run in termianl command

docker-compose up

3. Open in browser http://localhost:9292