WebKit should either handle directory uploads or refuse directory drags

• Component: New Bugs
• Status: NEW ---

[Eric Seidel (no email)]

It's currently possible to drag a directory onto a <input type="file"> control.  It's not possible to pick one from the file picker.

If we're going to support dragging directories onto a file control we need to do something intelligent (like auto-zipping the directory on submission).

If we don't want to support dragging directories onto file controls, we need a good UI for when we prevent it (like showing the "can't drop" cursor during the drag).

If a drag has both files and directories in it, we should treat it the same as if it just has a directory, I think.  Either way we need to handle this case.


Currently when you try to submit a directory, we do the following:

Safari can’t open the page.
Safari can’t open the page “https://bugs.webkit.org/attachment.cgi”. The error is: “Operation could not be completed. Is a directory” (NSPOSIXErrorDomain:21) Please choose Safari > Report Bugs to Apple, note the error number, and describe what you did before you saw this message.

Instead we should throw a JS exception on form.submit() or something (or maybe we already do, I clicked the "submit" button manually).

I can break this into multiple bugs as needed.

[Eric Seidel (no email)]

Three tests for directory dragging are being added in editing/pasteboard/file-input-files-access.html as part of bug 25852.

[Eric Seidel (no email)]

Looks like the zipping behavior is intended!
https://bugs.webkit.org/show_bug.cgi?id=21115

[Eric Seidel (no email)]

Zipping behavior is client defined, it seems.  I guess the current Safari client only choses to zip bundles, leaving CF Network to fail when trying to send directories.

This bug is about that we should *refuse* the drag if we can't handle them.  Or handle the directories properly if we accept the drag.  Anything else is confusing to the user.

[Eric Seidel (no email)]

Changing title to "WebKit should either handle directory uploads or refuse directory drags"
currently we both accept the drag and fail the upload, see the above mentioned CFNetwork error message.

[Eric Seidel (no email)]

Related https://bugs.webkit.org/show_bug.cgi?id=25913