Learn R
R.utils (version 1.6.4)

downloadFile.character: Downloads a file

Description

Downloads a file.

Usage

## S3 method for class 'character}(url, filename=basename(url), path=NULL, skip=TRUE, overwrite=!skip, ..., username=NULL, password=NULL, binary=TRUE, dropEmpty=TRUE, verbose=FALSE)':
downloadFileundefined

url{A character string specifying the URL to be downloaded.}
 filename, path{(optional) character strings specifying the
   local filename and the path of the downloaded file.}
 skip{If TRUE, an already downloaded file is skipped.}
 overwrite{If TRUE, an already downloaded file is overwritten,
   otherwise an error is thrown.}
 ...{Additional arguments passed to download.file.}
 username, password{character strings specifying the username
   and password for authenticated downloads.  The alternative is to
   specify these via the URL.}
 binary{If TRUE, the file is downloaded exactly "as is", that is,
   byte by byte (recommended).}
   which means it willand the downloaded file is empty, the file
 dropEmpty{If TRUE and the downloaded file is empty, the file
   is ignored and NULL is returned.}
 verbose{A logical, integer, or a Verbose object.}

Returns the local pathname to the downloaded filename,
  or NULL if no file was downloaded.


Currently arguments username and password are only used
  for downloads via URL protocol 'https'.  The 'https' protocol requires
  that 'wget' is available on the system.


pathname <- downloadFile("http://www.r-project.org/index.html", path="www.r-project.org/")
 print(pathname)

[object Object]

Internally download.file is used.
  That function may generate an empty file if the URL is not available.



methods
programming
file

Arguments