Trouble with shiny bookmark feature

[samaprashanth]

Hi,

I am having trouble running my shiny application which contains shiny bookmark function (usage of bookmark button) on shinyproxy.

My application uses bookmark button in shiny to save a specific state of the shiny application as an url so that the users are able to retrieve any scenarios they saved for future research.
When we use bookmark function in a shiny application it creates a directory called shiny_bookmarks (Which will be used by shiny to retrieve the state of the application once they click on the saved urls) within the directory where the code for the application is present but when I deploy it on Shiny proxy as it runs within the docker containers this folder gets lost once the user closes the application unable to retrieve it. Moreover it looks like a separate docker container for the application is being created per user.

So, I am assuming that if I am able to gather these local (to the container) shiny_bookmarks folder from all the instances of the container whenever a user bookmarks something and store them at a common place (like server or s3 bucket) and update the local folder within the container by copying it back from the common place to the container being used whenever some user tries to retrieve a saved url then it solve my issue.

I am not well experienced with docker containers. What will be the ideal way to go about it or is there any function within shinyproxy that can help with the situation. I am attaching an example code for bookmarking below incase if it help understand my problem better.

Any help is much appreciated.

Thank you ..!!!

`
ui <- function(request) {
fluidPage(
sidebarPanel(
sliderInput("n", "Value to add", min = 0, max = 100, value = 50),
actionButton("add", "Add"), br(), br(),
bookmarkButton()
),
mainPanel(
h4("Sum of all previous slider values:", textOutput("sum"))
)
)
}

server <- function(input, output, session) {
vals <- reactiveValues(sum = 0)

Save extra values in state$values when we bookmark

onBookmark(function(state) {
state$values$currentSum <- vals$sum
})

Read values from state$values when we restore

onRestore(function(state) {
vals$sum <- state$values$currentSum
})

Exclude the add button from bookmarking

setBookmarkExclude("add")

observeEvent(input$add, {
vals$sum <- vals$sum + input$n
})
output$sum <- renderText({
vals$sum
})
}

shinyApp(ui, server, enableBookmarking = "url")
`

[samaprashanth]

Closing the issue as I was able to resolve it using container-volumes option in the config file.