Shiny unable download report

[Abe]

Hello, Dear R Community I need your help regarding shiny. I am getting error downloading report when app is deployed on shiny and rsconnect. But locally it is working fine. I have attched the log

library(shiny)
library(sdcMicro)


ui <- fluidPage(    
  titlePanel("Sample SDC Report"),
  uiOutput("ui_export_report")
)


server <- function(input, output) {
  data(testdata)
  sdcObj <- createSdcObj(
    testdata,
    keyVars = c('urbrur', 'roof', 'walls', 'water', 'electcon', 'relat', 'sex'),
    numVars = c('expend', 'income', 'savings'), w = 'sampling_weight'
  )
  
  output$ui_export_report <- renderUI({
    fluidRow(column(12,  
                    shiny::downloadButton("myRepDownload", "Save report", btn.style = "primary"), align = "center"
    ))
  })
  
  output$myRepDownload <- shiny::downloadHandler(
    filename = function() {
      paste0("sdcreport-", Sys.Date(), ".html")
    },
    
    content = function(file) {
      sdcMicro::report(
        sdcObj,
        outdir = tempdir(),
        filename = "tmp",
        title = "SDC-Report",
        internal = TRUE,
        verbose = FALSE
      )
      f_tmp <- file.path(tempdir(), "tmp.html")
      on.exit(file.remove(f_tmp))
      file.copy(from = f_tmp, to = file)
    }
  )  
}

shinyApp(ui = ui, server = server)

[nirgrahamuk]

my assumption would be that sdcMicro::report wants to use interim files, and the default working directory isnt appropriate for that, so maybe using someithng like withr package, with_tempdir() would help.

[Abe]

@nirgrahamuk

with_tempdir()

Thank you @nirgrahamuk, Do you mean changing tempdir() to with_tempdir(), if so I did it and it did not work as well

[nirgrahamuk]

no. tempdir() is for your output and you would still want that, but you want the working directory to be different (perhaps) so with_tempdir() should wrap your function

with_dir(tempdir(), sdcMicro::report(
        sdcObj,
        outdir = tempdir(),
        filename = "tmp",
        title = "SDC-Report",
        internal = TRUE,
        verbose = FALSE
      ))

[Abe]

Oh, I see your point let me try that, Thank you for your support. I will update you shortly

[Abe]

Unfortunately, It did not solve the problem same issue

[Abe]

I changed server part to this

  output$myRepDownload <- shiny::downloadHandler(
    filename = function() {
      paste0("sdcreport-", Sys.Date(), ".html")
    },
    
    content = function(file) {
      with_dir(tempdir(), sdcMicro::report(
        sdcObj,
        outdir = tempdir(),
        filename = "tmp",
        title = "SDC-Report",
        internal = TRUE,
        verbose = FALSE
      ))
      f_tmp <- file.path(tempdir(), "tmp.html")
      on.exit(file.remove(f_tmp))
      file.copy(from = f_tmp, to = file)
    }
  )  
}

shinyApp(ui = ui, server = server)

[nirgrahamuk]

@Abe

sdcMicro::report

I suppose the next thing to do is to try and set Knitr options for your project...
and/or raise an issue with the sdcMicro package authors.
https://github.com/sdcTools/sdcMicro/search?q=knitr&type=Issues

[Abe]

Thank you @nirgrahamuk, I will explore it