在R Shiny应用程序中自动删除的临时文件-文件错误：无法打开连接 [英] Temp files automatically deleted in R shiny app - Error in file: cannot open the connection

问题描述

我创建了一个R Shiny应用程序，该程序每天使用批处理文件自动运行。
启动应用程序时，一切正常，但第二天崩溃，我收到以下消息：

I created a R shiny app that automatically runs every day using a batch file. Everything works fine when lauching the app, but the next day it crashes and I get the following message:

Warning in file(open = "w+") :
  cannot open file
'C:\Users\bertin\AppData\Local\Temp\RtmpKiBPOU\Rf3f835d1a66' : No such file or directory
Warning: Error in file: cannot open the connection
  [No stack trace available]

实际上，此问题与执行闪亮应用程序的R会话创建的 tempdir（）文件夹有关。一定时间后，此文件夹将自动删除。每次刷新时都必须删除所有Temp文件吗？还是相反，需要防止R删除Temp文件夹上的所有闪亮的临时文件？谢谢！

Actually this issue is related to the tempdir() folder created by the R session executing the shiny app. This folder is automatically deleted after a certain time. Do I have to delete all Temp files on each refreshing? Or on the contrary is it needed to prevent R from deleting all shiny temp files on Temp folder? Thanks!

编辑-这是有意产生错误的方法：

Edit - Here is how to intentionally generate the error:

tempdir()
dir.exists(tempdir())

library(shiny)

# Windows shell required
shinyApp(
    ui = fluidPage("Please reload to see me fail."),
    server = function(input, output) {
        shell(paste("rmdir", dQuote(
            normalizePath(tempdir(), winslash = "/", mustWork = FALSE), q = FALSE
        ), "/s /q"))
    }
)

推荐答案

现在，我已经在Windows 10（Storage Sense）中找到了有关删除临时文件的设置，该设置似乎已被激活

By now I've found a setting in Windows 10 (Storage Sense) concerning the deletion of temporary files, which seems to be active by default.

导航如下，并取消选中：

1. 设置


2. 系统存储


3. 存储意识


4. 更改我们自动释放空间的方式


5. 删除临时文件我的应用未使用

1. Settings
2. System Storage
3. Storage Sense
4. Change how we free up space automatically
5. Delete temporary files that my apps aren't using

这篇关于在R Shiny应用程序中自动删除的临时文件-文件错误：无法打开连接的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！