Swift Networking

Lifecycle Position

Phase 3 (Implement). Load when building features that call external APIs or persist remote data.

Workflow Decision Tree

1) Build a REST API client

• Define a protocol-based API client (see references/networking-patterns.md)
• Use URLSession.shared.data(for:) for standard requests
• Decode responses with JSONDecoder configured for the API's conventions
• Handle errors at every layer: network → HTTP status → decode → domain

2) Download files

• Use URLSession.shared.download(from:) for large files
• Monitor progress with AsyncBytes or delegate
• Save to temporary directory, then move to final location