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parseSavePath crashes if shinySaveButton does not have filetype #45

zeehio opened this Issue Sep 23, 2016 · 2 comments


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zeehio commented Sep 23, 2016


Thanks for your work on this package and congratulations on your PhD (I assume you have finished it since there is a new version of shinyFiles around).

Going to the issue...:

If shinySaveButton does not have filetype specified, it is set to null by formatFiletype. Then parseSavePath will crash at the data.frame(name = selection$name, type = selection$type, datapath = savefile) because the type column will be NULL..

I am not familiar enough with shiny to provide a solution (maybe replacing the type if it is NULL by something else?). I hope the issue is clear enough and hopefully you will be able to fix this.

Thanks again!


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zeehio commented Sep 23, 2016

Also it may make sense to use stringsAsFactors = FALSE in the data frame that is returned from parseSavePath.


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PeterVermont commented Apr 8, 2017

A workaround is to pass an empty list as the filetype:

shinySaveButton('save', 'Save file', 'Save file as...', list('hidden_mime_type'=c(""))),

@thomasp85 thomasp85 closed this in 5cbf08f Apr 29, 2017

thomasp85 added a commit that referenced this issue Apr 29, 2017

Fix crash on `parseSavePath` when UI does not have filetype (#47)
* Update travis to sudo:false

* Fix crash on `parseSavePath` when the UI does not provide a `filetype`. Closes #45.
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