R: Functions to load files from a web site

loadFromUrl {AnnBuilder}

R Documentation

Functions to load files from a web site

Description

Given an url, these functions download a file from a given web site and unzip the file if it is compressed.

Usage

loadFromUrl(srcUrl, destDir = "")
validateUrl(srcUrl)
unzipFile(fileName, where = file.path(.path.package("SAGElyzer"),
"data"), isgz = FALSE)

Arguments

`srcUrl`	`srcUrl` a character string for the url of the file to be downloaded
`destDir`	`destDir` a character string for a loacal directory where the file to be downloaded will be saved
`where`	`where` same as destDir
`isgz`	`isga` a boolean indicating whether the downloaded file is a gz file
`fileName`	`fileName` a character string for the name of a file

Details

These functions are used by various objects in package pubRepo to download data files from a web site. If the file is compressed, decompressing will be applied and the path for the decompressed file will be returned.

validateUrl will terminate the process if an invalid url is passed.

unzipFile decompress the file passed as fileName.

Value

loadFromUrl returns a character string for the name of the file saved locally.

Note

The functions are part of the Bioconductor project at Dana-Farber Cancer Institute to provide Bioinformatics functionalities through R

Author(s)

Jianhua Zhang

Examples

# Get a dummy data file from Bioconductor web site
data <-
loadFromUrl("http://www.bioconductor.org/datafiles/wwwsources/Tll_tmpl.gz",
destDir = "")
unlink(data)

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