Learn SINATRA with Real Code Examples

Simple 'Hello World' web app

JSON REST API with CRUD endpoints

Rendering HTML templates for a small blog

Internal tool for data processing with web interface

Microservice integrated with larger Rails or Sinatra ecosystem

Ensure required gems are installed

Check route paths and HTTP methods

Verify Rack server is running

Debug with `puts` statements or logging

Check for conflicts with other middleware

Test routes using Rack::Test

Validate JSON responses with RSpec

Unit test helpers and filters

Check template rendering

Mock external services for integration tests

Standalone Sinatra app on Puma or Thin

Docker container for portability

Reverse proxy with Nginx or Apache

Cloud deployment on Heroku, AWS, or GCP

Integrated into microservice architecture

Rack-compatible servers: Puma, Thin, Unicorn

ERB, Haml, Slim for templates

Rack middleware for logging, sessions, and security

Rake tasks for automation

Bundler for dependency management

Databases via ActiveRecord, Sequel, or ROM

External APIs using HTTParty or Faraday

Background jobs via Sidekiq or Resque

Testing frameworks: RSpec, Minitest

Deployment with Docker, Heroku, or Capistrano

Handling scaling and concurrency

Maintaining modular code in multi-file apps

Securing endpoints and sanitizing inputs

Integrating with external services reliably

Managing performance for higher traffic apps