tar_download_run: Download multiple URLs and return the local paths.

In tarchetypes: Archetypes for Targets

Download multiple URLs and return the local paths.

Description

Not a user-side function. Do not invoke directly.

Usage

tar_download_run(urls, paths, method, quiet, mode, cacheOK, extra, headers)

Arguments

urls	Character vector of URLs to track and download. Must be known and declared before the pipeline runs.
paths	Character vector of local file paths to download each of the URLs. Must be known and declared before the pipeline runs.
method	Method to be used for downloading files. Current download methods are "internal", "libcurl", "wget", "curl" and "wininet" (Windows only), and there is a value "auto": see ‘Details’ and ‘Note’. The method can also be set through the option "download.file.method": see options().
quiet	If TRUE, suppress status messages (if any), and the progress bar.
mode	character. The mode with which to write the file. Useful values are "w", "wb" (binary), "a" (append) and "ab". Not used for methods "wget" and "curl". See also ‘Details’, notably about using "wb" for Windows.
cacheOK	logical. Is a server-side cached value acceptable?
extra	character vector of additional command-line arguments for the "wget" and "curl" methods.
headers	named character vector of HTTP headers to use in HTTP requests. It is ignored for non-HTTP URLs. The User-Agent header taken from the HTTPUserAgent option (see options) is automatically used as the first header.

Value

A character vector of file paths where the URLs were downloaded.

Examples

if (identical(Sys.getenv("TAR_LONG_EXAMPLES"), "true")) {
  tarchetypes::tar_download_run(
    urls = "https://httpbin.org/etag/test",
    paths = tempfile(),
    method = NULL,
    quiet = TRUE,
    mode = "w",
    cacheOK = NULL,
    extra = NULL,
    headers = NULL
  )
}

tarchetypes documentation built on Oct. 4, 2023, 5:08 p.m.