download_retry: Retry multiple times to download a file

In recount: Explore and download data from the recount project

Description

This function is based on the Bioconductor guidelines for querying data from the web at http://bioconductor.org/developers/how-to/web-query/. It will run download a set of N.TRIES times before giving up. We implemented this function to reduce the number of Bioconductor build errors due to the occassional errors from our data hosting server.

Usage

download_retry(url, destfile = basename(url), mode = "wb", N.TRIES = 3L, ...)

Arguments

url	The URL to download. Passed to download.
destfile	The destination file. Defaults to the base name of the URL. Passed to download.
mode	Mode for writing the file. The default wb is used for binary files. This value is passed to download which passes it to download.file.
N.TRIES	The number of download attempts before giving up; default: 3. Should be an integer of length one with a value greater than 0.
...	Additional arguments passed to download.

Value

An invisible integer code as specified in download.file.

Examples

## Download the first files_info.tsv file (version 1)
download_retry(
    recount_url$url[which(recount_url$file_name == "files_info.tsv")[1]]
)

recount documentation built on Dec. 20, 2020, 2:01 a.m.