Unreal seems to be hard coded to block file dialogs?

Development Programming & Scripting C++
1

So, purchased this plugin for 5.3 to open pdfs. Great plugin, has an ‘open’ button that lets you pick a file with a file dialog. Saw the demo of it working, but when I tried it I got this error saying ‘Filedialogs are prevented’ I managed to find this error in one function, but it seems strange, because it seems like this function is set up to always block them and I can’t seme to find any way in the project settings to enable them.

Here is the function:

bool FCEFWebBrowserWindow::OnFileDialog(CefDialogHandler::FileDialogMode Mode, const CefString& DialogTitle, const CefString& DefaultFilePath, const std::vector<CefString>& AcceptFilters, int SelectedAcceptFilter, CefRefPtr<CefFileDialogCallback> Callback)
{
	// This would prevent a file dialog from opening.
	UE_LOG(LogWebBrowser, Error, TEXT("FileDialogs are prevented."));
	return true;
}

Has anyone worked with this function before, or know a way (other than overriding it since this is launcher) to allow it to work? It’s bizarre that this is hardcoded to block.

2

This function is an interface for interacting with Chromium-based browsers.
It appears that its functionality was intentionally disabled in Unreal 5.4
According to commit patch that changed it, this was a security vulnerability.

You should probably report this issue to the plugin author.
It should still work on older Unreal versions though.

This is actually a pretty common tactic when you need to implement the interface but not all of it, you just provide a dummy function with some assert or error, so when the code needs to run it shows appropriate message instead of doing nothing.

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