Generate pdf from html

[michaelgloven]

Hi,

I have a shiny app which generates html outputs and I'd like to download this output as a pdf. I tried converting the data to an rmd and replacing a document on my www within the application, but the document does not update.

here's a reprex, does anyone have an idea how to do this? I tried chrome_print but it fails to work on linux (documented issue on github).

library(shiny)
library(summarytools)
library(dplyr)
library(htmltools)
library(quarto)
library(tinytex)

ui <- fluidPage(
  downloadButton("downloadReport", "Download PDF Report")
)

server <- function(input, output) {
  report <- shiny::reactive({
    y1 <- c("T", "T", "T", "T", "T", "T", "F", "F", "F", "N")
    y2 <- c("A", "B", "A", "B", "A", "B", "A", "B", "C", "D")
    x3 <- c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
    x4 <- c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
    x5 <- c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
    d <- data.frame(y1, y2, x3, x4, x5)
    
    # Your existing code for generating the report
    out <- print(arrange(dfSummary(d, round.digits = 3, max.distinct.values = 5), Variable),
                 headings = FALSE, method = 'render', valid.col = FALSE, footnote = "", bootstrap.css = FALSE)
    out[[3]][[1]][[3]][[2]] <- NULL
  })
  
  # Generate PDF report
  output$downloadReport <- downloadHandler(
    filename = "my_report.pdf",
    content = function(file) {
      rmarkdown::render("www", output_file = file,
                        params = list(my_content = report()))
    }
  )
}

# Run the Shiny app
shinyApp(ui, server)