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51 lines
1.7 KiB
R
51 lines
1.7 KiB
R
% Generated by roxygen2 (4.0.0): do not edit by hand
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\name{downloadHandler}
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\alias{downloadHandler}
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\title{File Downloads}
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\usage{
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downloadHandler(filename, content, contentType = NA)
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}
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\arguments{
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\item{filename}{A string of the filename, including extension, that the
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user's web browser should default to when downloading the file; or a
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function that returns such a string. (Reactive values and functions may be
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used from this function.)}
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\item{content}{A function that takes a single argument \code{file} that is a
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file path (string) of a nonexistent temp file, and writes the content to
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that file path. (Reactive values and functions may be used from this
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function.)}
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\item{contentType}{A string of the download's
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\href{http://en.wikipedia.org/wiki/Internet_media_type}{content type}, for
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example \code{"text/csv"} or \code{"image/png"}. If \code{NULL} or
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\code{NA}, the content type will be guessed based on the filename
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extension, or \code{application/octet-stream} if the extension is unknown.}
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}
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\description{
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Allows content from the Shiny application to be made available to the user as
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file downloads (for example, downloading the currently visible data as a CSV
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file). Both filename and contents can be calculated dynamically at the time
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the user initiates the download. Assign the return value to a slot on
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\code{output} in your server function, and in the UI use
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\code{\link{downloadButton}} or \code{\link{downloadLink}} to make the
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download available.
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}
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\examples{
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\dontrun{
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# In server.R:
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output$downloadData <- downloadHandler(
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filename = function() {
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paste('data-', Sys.Date(), '.csv', sep='')
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},
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content = function(file) {
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write.csv(data, file)
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}
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)
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# In ui.R:
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downloadLink('downloadData', 'Download')
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}
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}
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