How to detect when running on shinyapps.io?

[Eric Goldsmith]

Is there a way to detect if an application is running on shinyapps.io (vs. running locally)?

For example, in the Docker world, you can do this:

if (file.exists("/.dockerinit")) {

  # Running in a Docker container

}

Any equivalent for shinyapps.io?

Thanks,

Eric

[Tareef Kawaf]

Hi Eric,

I don't think we have gotten this request in the past.  My guess is that easiest thing to do would be to have an environment variable that you test for, and just setting that environment variable in your local environment, but maybe someone else has a better way of doing it.  

-Tareef

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[Usman Suleman]

Here is something simple:

##

# Am I on shinyapps.io or running Local

#

isLocal <<- Sys.getenv('SHINY_PORT') == ""

if(isLocal) {

  cat(file=stderr(),"App running on Local ...\n")

} else {

  cat(file=stderr(),"App running on Shinyapps.io...\n")

}