Run shinyApp locally

Question

I want to create a shinyApp that runs just locally, i.e. withouth a URL that can be accessed by others.

Here a minimal example:

library(shiny)
ui <- fluidPage("Some app")
server <- function(input, output) {}
shinyApp(ui = ui, server = server)

While running this, the console says:

If I type the URL into my browser, I see the App I am writing on. How can I hinder the app to go online? This is important for my use case because we handle sensible data which must remain locally.

@TarJae How do I know this or to put it the other way around: What does "Listening on http://..." mean if not online? — LulY, Jul 26 '22 at 07:58
So I see you have to go through some basic (no offense), I had to do it also and still I am not that clear about all this server side, local etc... So my tip is to start with , but more important is that you understand how you can make your app public accessable. Then you will understand what is local and what is public. Think of a local network in your company where all of your members have access to your app, but no one outside the company etc..... — TarJae, Jul 26 '22 at 08:03
Please see [this](https://en.wikipedia.org/wiki/Loopbackand) and [this](https://en.wikipedia.org/wiki/Localhost). — ismirsehregal, Jul 26 '22 at 08:05
Just ignore the downvotes. Mission is to learn! Never give up!!! Have fun! :-) — TarJae, Jul 26 '22 at 08:10
[Here](https://stackoverflow.com/a/26800937/9841389) you can find a related answer. Furthermore, the first link in my above comment is broken and I can't edit any longer - correct link: https://en.wikipedia.org/wiki/Loopback — ismirsehregal, Jul 26 '22 at 08:41
@ismirsehregal Great! First link dead, but could find it with the word that appears (Loopback) — LulY, Jul 26 '22 at 08:54

score 2 · Accepted Answer · answered Jul 26 '22 at 10:40

Just to leave a clear answer regarding your question:

Your app never was online.

Via 127.0.0.1 your browser is accessing the standard address for IPv4 loopback traffic on your localhost (your PC) - please see this.

runApp()'s default for the host parameter is:

host = getOption("shiny.host", "127.0.0.1")

On the other hand using runApp("0.0.0.0") as described here makes your app accessible from the LAN.

To share your shiny applications online you can e.g. publish them on shinyapps.io.

Run shinyApp locally

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