当我们在shinyapps.io中使用Learn R或托管版本的自托版本时，用户可以使用代码评估器打印包含教程源代码的变量。
例如，在 .server_context 以获取当前RMD的源代码：
（更新）示例2：
通过运行 cat（系统（“ cat/srv/connect/apps/ex-data-filter/ex-data-filter.rmd”，intern = true），sep ='\ n'）可以获取源当前RMD的代码也：
但有趣的是，在 rstudio.cloud.cloud.cloud 托管版本，代码评估器似乎是沙箱的，所有“敏感”变量无法通过评估器运行。
我可以就如何实现这种安全的代码评估器获得一些建议吗？
谢谢！
When we use the self-hosted version of Learn R or hosted version in shinyapps.io, the user can print out variables that contain the tutorial source code using the code evaluator.
For example in shinyapps hosted version, the user can run .server_context to get the source code of the current rmd:
(UPDATED) Example 2:
By running cat(system("cat /srv/connect/apps/ex-data-filter/ex-data-filter.Rmd", intern = TRUE), sep = '\n') can to get the source code of the current rmd too:
But interestingly in rstudio.cloud hosted version, the code evaluator seems to be sandboxed, and all "sensitive" variables cannot be run through the evaluator.
Can I get some advice on how to implement such a secure code evaluator?
Thanks!
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