download_single_session_asset_fr_df {databraryr}

Download Single Asset From Databrary

Description

Databrary stores file types (assets) of many types. This function downloads an asset based on its system-unique integer identifer (asset_id) and system-unique session (slot) identifier (session_id). It is designed to work with download_session_assets_fr_df() so that multiple files can be downloaded simultaneously.

Usage

download_single_session_asset_fr_df(
  i = NULL,
  session_df = NULL,
  target_dir = tempdir(),
  add_session_subdir = TRUE,
  overwrite = TRUE,
  make_portable_fn = FALSE,
  timeout_secs = REQUEST_TIMEOUT_VERY_LONG,
  vb = options::opt("vb"),
  rq = NULL
)

Arguments

i

An integer. Index into a row of the session asset data frame. Default is NULL.

session_df

A row from a data frame from list_session_assets() or list_volume_assets(). Default is NULL>

target_dir

A character string. Directory to save the downloaded file. Default is a temporary directory given by a call to tempdir().

add_session_subdir

A logical value. Add add the session name to the file path so that files are in a subdirectory specific to the session. Default is TRUE.

overwrite

A logical value. Overwrite an existing file. Default is TRUE.

make_portable_fn

A logical value. Replace characters in file names that are not broadly portable across file systems. Default is FALSE.

timeout_secs

An integer. The seconds an httr2 request will run before timing out. Default is 600 (10 min). This is to handle very large files.

vb

Show verbose messages. (Defaults to FALSE, overwritable using option 'databraryr.vb' or environment variable 'R_DATABRARYR_VB')

rq

A list in the form of an httr2 request object. Default is NULL.

Value

Full file name to the asset or NULL.

Examples

## Not run: 
vol_1 <- list_session_assets(session_id = 9807)
a_1 <- vol_1[1,]
tmp_dir <- tempdir()
fn <- file.path(tmp_dir, paste0(a_1$asset_name, ".", a_1$format_extension))
download_single_session_asset_fr_df(a_1$asset_id,
  fn,
  session_id = a_1$session_id,
  vb = TRUE)


## End(Not run)