New Rack Project
We’ll create Rack project from scratch.
mkdir rack
cd rack
Let’s create a simple Rack app.
app.rb
class App
def self.call(env)
text = "hello from rack"
puts "#{Time.now}: #{text}"
headers = {"Content-Type" => "text/plain"}
body = [text]
status = 200
[status, headers, body]
end
end
Let’s create the Gemfile for dependencies.
Gemfile
source "https://rubygems.org"
gem "jets", ">= 6.0"
gem "puma"
We’ll also create a config.ru so we can test locally rack-based puma server.
config.ru
require "bundler/setup"
require_relative "app"
run App
We’re intentionally trying to keeping the app simple for testing.
Bundle
Run bundler to install the Gemfile dependencies
bundle
Next, we’ll do some local testing.