downloadHandler
downloadHandler(filename, content, contentType = NA)
Arguments
filename | A string of the filename, including extension, that the user's web browser should default to when downloading the file; or a function that returns such a string. (Reactive values and functions may be used from this function.) |
---|---|
content | A function that takes a single argument file that is a
file path (string) of a nonexistent temp file, and writes the content to
that file path. (Reactive values and functions may be used from this
function.) |
contentType | A string of the download's
content type, for
example "text/csv" or "image/png" . If NULL or
NA , the content type will be guessed based on the filename
extension, or application/octet-stream if the extension is unknown. |
File Downloads
Description
Allows content from the Shiny application to be made available to the user as
file downloads (for example, downloading the currently visible data as a CSV
file). Both filename and contents can be calculated dynamically at the time
the user initiates the download. Assign the return value to a slot on
output
in your server function, and in the UI use
downloadButton
or downloadLink
to make the
download available.
Examples
## <strong>Not run</strong>: # # In server.R: # output$downloadData <- downloadHandler( # filename = function() { # paste('data-', Sys.Date(), '.csv', sep='') # }, # content = function(file) { # write.csv(data, file) # } # ) # # # In ui.R: # downloadLink('downloadData', 'Download') # ## <strong>End(Not run)</strong>