Utilities to download and manage files — util_download • evoland

In order to maintain a clean set of raw data files, these functions help with retrieving the raw data from an online source and caching it.

Usage

download_and_verify(
  df_in,
  target_dir = getOption("evoland.cachedir"),
  overwrite = FALSE
)

Arguments

df_in: Data frame with 'url' and 'md5sum' columns
target_dir: Target directory for downloads, defaults to option evoland.cachedir
overwrite: Whether to overwrite existing files (default: FALSE)

Value

df_out, Same as df_in but with added column "local_filename", the full path of which can be constructed

Functions

download_and_verify(): Download a set of files and check their integrity against their md5 checksum