You can use dir2json with Shiny to create a web application thatallows users to upload files, encode them into JSON format, and processor download the resulting JSON file. Below is an example of how toimplement this functionality in a Shiny app.
ui<-fluidPage(titlePanel("Encode Uploaded Files to JSON"),sidebarLayout(sidebarPanel(fileInput("files","Upload Files",multiple =TRUE),actionButton("encode","Encode to JSON"),downloadButton("downloadJSON","Download JSON") ),mainPanel(verbatimTextOutput("jsonOutput") ) ),# Custom CSS to enable line wrapping tags$style(HTML(" #jsonOutput { white-space: pre-wrap; word-wrap: break-word; max-height: 400px; overflow-y: auto; } ") ))server<-function(input, output, session) {# Reactive value to store the JSON data json_data<-reactiveVal(NULL)observeEvent(input$encode, {req(input$files)# Ensure files are uploaded# Create a temporary directory to store uploaded files temp_dir<-tempfile()dir.create(temp_dir)# Copy uploaded files to the temporary directoryfor (iinseq_len(nrow(input$files))) {file.copy(input$files$datapath[i],file.path(temp_dir, input$files$name[i])) }# Encode the directory to JSONjson_data(json_encode_dir(temp_dir)) })# Display the JSON data in the UI output$jsonOutput<-renderText({req(json_data())json_data() })# Allow the user to download the JSON file output$downloadJSON<-downloadHandler(filename =function() {"encoded_files.json" },content =function(file) {req(json_data())writeLines(json_data(), file) } )}shinyApp(ui, server)