Capture examples

Start with a file capture, then use the matching memory example when your application needs bytes or progress events.

Save a page

offprint capture https://example.com --output example.html

The quickstart covers installation, opening the result, and inspecting its evidence.

Complete programs in each language create a service, capture the page, and close the service:

Language	Write a file	Return bytes and observe events	Setup
Rust	capture_file.rs	capture_memory.rs	Rust integration
Node.js	capture.ts	capture-memory.ts	Node.js integration
Python	capture.py	capture_memory.py	Python integration

Adapt the capture

Task	Example
Capture the first matching article	Selector capture
Wait for data and rendered content	Readiness
Pass an authorization header or session cookie	Authenticated pages
Fail when a rendering resource is missing	Resource policy
Capture a local HTML file	Allowed file roots
Permit a controlled private network	Custom network rules
Export PDF, Markdown, or an archive	Export representations
Capture a list of URLs or follow links	Batch and crawl

Inspect preservation evidence

The repository also contains browser fixtures for script-rendered content, frames, shadow roots, stylesheets, form state, canvas pixels, resource failures, and offline verification. Each fixture has one executable test owner.

After contributor setup, run a named fixture from the repository root:

just test-fixture script-rendered-document

Browse the fixture catalog and testing guide to check a specific preservation contract or add a regression case.