Cookbook

Practical recipes for building real programs with Kaappi. Each recipe is a self-contained guide that solves one problem end-to-end.

Recipes

Web & API

• Build a REST API — full CRUD API with PostgreSQL, Redis caching, validation, and error handling
• Call HTTP APIs — GET/POST requests, JSON decoding, error handling, retries, and downloads
• Serve HTML with Templates — dynamic HTML pages with the template engine, layouts, and auto-escaping

Data Processing

• Process JSON Data — read, transform, filter, and write JSON from files and APIs
• Parse and Generate CSV — read CSV files, process rows, write results, and handle edge cases
• Store Data in SQLite — local persistence with schemas, CRUD helpers, transactions, and streaming

Application Patterns

• Read Configuration Files — TOML/YAML config with defaults, environment overrides, and validation
• Run Concurrent Tasks — fibers, channels, pipelines, and worker pools
• Write Tests — test organization, assertions, error testing, and CI integration
• Build a CLI Tool — argument parsing, subcommands, and help generation

Each recipe assumes you have installed Kaappi and know the basics from the tutorial. If a recipe uses ecosystem libraries, installation commands are shown at the top.