Shiny (R): Download selection in selectInput to local machine -


i trying create shiny app users can view list of files in directory, select 1 of files, , download computer. may over-complicating this, can't seem find solution.

ui.r

filenames <- list.files(path=".",pattern="\\.txt") shinyui(navbarpage("download page", tabpanel("download", sidebarlayout( sidebarpanel( selectinput("filenames", "select file want download:", filenames), downloadbutton('downloaddata', 'download') ),  mainpanel( p("preview of sheet."), tableoutput('table') )))))

server.r

library(shiny)  shinyserver(function(input, output) {    datasetinput <- reactive({     switch(input$filenames,           filenames)   })    output$table <- rendertable({     datasetinput()   })    output$downloaddata <- downloadhandler(     filename = function() { paste(input$dataset, '.csv', sep='') },     content = function(file) {       write.csv(datasetinput(), file)     }   )})

when run app, can view list of files in directory, download function not result in selected file being downloaded.

assuming bunch of 'csv' files in working directory code below list , preview 'csv' files , download selected file desired directory.

ui.r

shinyui(navbarpage("download page", tabpanel("download", sidebarlayout(       sidebarpanel(            selectinput("filenames", "select file want download:", list.files(pattern = '.csv')),             downloadbutton('downloaddata', 'download')),       mainpanel(          p("preview of sheet."),       tableoutput('table') )))))

server.r

library(shiny)  shinyserver(function(input, output) {    datasetinput <- reactive({     switch(input$filenames,            filenames)   })    output$table <- rendertable({     read.csv(input$filenames, header=true)   })     output$downloaddata <- downloadhandler(     filename = function() {input$filenames},     content = function(file) {write.csv(read.csv(input$filenames, header=true),file)}   )})

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