wayback_snapshot_url: Resolve a Wayback Machine snapshot URL

In rmoriebricklayer: Reproducible Data Capsules with Provenance and Fallback

Resolve a Wayback Machine snapshot URL

Description

Queries the Internet Archive availability API (http://archive.org/wayback/available) for the closest archived snapshot of url and returns a directly-downloadable snapshot URL, or NULL if no snapshot exists or the lookup fails. This is the shared fetch failsafe the wider morie package family relies on: callers attempt the live source first and fall back to this snapshot when the source is unreachable.

Usage

wayback_snapshot_url(url, timestamp = NULL)

Arguments

url	The original source URL to look up.
timestamp	Optional 14-digit YYYYMMDDhhmmss target; the API returns the snapshot closest to it. Defaults to the most recent.

Value

A character scalar snapshot URL, or NULL.

Examples

wayback_snapshot_url("https://www.r-project.org/")

rmoriebricklayer documentation built on Aug. 5, 2026, 9:08 a.m.