Description
Progress Bars for Downloads in 'shiny' Apps.
Description
Modifies the progress() function from 'httr' package to let it send output to progressBar() function from 'shinyWidgets' package. It is just a tweak at the original functions from 'httr' package to make it smooth for 'shiny' developers.
README.md
shinyhttr
The goal of shinyhttr is to integrate httr::progress with shinyWidgets::progressBar.
In practice, the difference will be
# from this
httr::GET("http://download.com/large_file.txt",
progress())
# to this
httr::GET("http://download.com/large_file.txt",
progress(session, id = "my_progress_bar1"))
Installation
From CRAN:
install.packages("shinyhttr")
From github:
devtools::install_github("curso-r/shinyhttr")
Example
library(shiny)
library(shinyWidgets)
library(httr)
library(shinyhttr)
ui <- fluidPage(
sidebarLayout(
NULL,
mainPanel(
actionButton('download', 'Download 100MB file...'),
tags$p("see R console to compare both progress bars."),
progressBar(
id = "pb",
value = 0,
title = "",
display_pct = TRUE
)
)
)
)
server <- function(input, output, session) {
observeEvent(input$download, {
GET(
url = "https://speed.hetzner.de/100MB.bin",
shinyhttr::progress(session, id = "pb") # <- the magic happens here. progress() now has session and id args
)
})
}
shinyApp(ui, server)