download_batch: download_batch(): Batch download files using multi_download...

In evanverse: Utility Functions for Data Analysis and Visualization

download_batch(): Batch download files using multi_download (parallel with curl)

Description

A robust batch downloader that supports concurrent downloads with flexible options. Built on top of curl::multi_download() for parallelism.

Usage

download_batch(
  urls,
  dest_dir,
  overwrite = FALSE,
  unzip = FALSE,
  workers = 4,
  verbose = TRUE,
  timeout = 600,
  resume = FALSE,
  speed_limit = NULL,
  retries = 3
)

Arguments

urls	Character vector. List of URLs to download.
dest_dir	Character. Destination directory (required). Use tempdir() for examples/tests.
overwrite	Logical. Whether to overwrite existing files. Default: FALSE.
unzip	Logical. Whether to unzip after download (for supported formats). Default: FALSE.
workers	Integer. Number of parallel workers. Default: 4.
verbose	Logical. Show download progress messages. Default: TRUE.
timeout	Integer. Timeout in seconds for each download. Default: 600.
resume	Logical. Whether to resume interrupted downloads. Default: FALSE.
speed_limit	Numeric. Bandwidth limit in bytes/sec (e.g., 500000 = 500KB/s). Default: NULL.
retries	Integer. Retry attempts if download fails. Default: 3.

Value

Invisibly returns a list of downloaded (and optionally unzipped) file paths.

evanverse documentation built on March 10, 2026, 5:07 p.m.