CefDownloadHandler not showing Dialog on Linux

[peerem]

The CefDownloadHandler not showing the dialog on Linux. The event was fired, but no "Save to..." dialog was shown.

internal class PeerEmDownloadHandler : CefDownloadHandler
{
    protected override void OnBeforeDownload(CefBrowser browser, CefDownloadItem downloadItem, string suggestedName, CefBeforeDownloadCallback callback)
    {
        base.OnBeforeDownload(browser, downloadItem, suggestedName, callback);

        LogHelper.Debug("Test", "OnBeforeDownload", true);

        // Ask for path
        callback.Continue(string.Empty, true);
    }
}

[mattkol]

@peerem

I do not think this will work straight out of the box for Linux and MacOS. You may have to implement a gtk "Save As" dialog to make it work.

That is exposing the gtk_file_chooser_native_new via C# using DllImport.

Like this example:

https://github.com/chromelyapps/Chromely/blob/542cd54d2a5452dd67d45aef0054f6187f17f809/src_5.0/Chromely/Native/LinuxGtk3/LinuxNativeMethods.cs#L83

There is an example here using CefSharp - https://stackoverflow.com/questions/39148865/cefsharp-onbeforedownload-handler-opening-open-file-window-instead-of-save-windo

So basically you replace the SaveFileDialog with your implementation.

  public void OnBeforeDownload(IBrowser browser, DownloadItem downloadItem, IBeforeDownloadCallback callback)
    {
        if (!callback.IsDisposed)
        {
            using (callback)
            {
                if (_allowDownload)
                {
                    SaveFileDialog saveFileDialog = new SaveFileDialog();

                    if (saveFileDialog.ShowDialog() == DialogResult.OK && saveFileDialog.FileName != "")
                    {

                    }
                    else
                }
                else

                callback.Continue(downloadItem.SuggestedFileName, showDialog: false);
            }

An alternative will be to use an HTML SaveFileDialog using JavaScript.

Chromely does not provide any of these options out of the box.

Thanks.

[peerem]

We are thinking about possibly running the application in the external Chrome/Edge "App Mode". CEF only causes problems, such as dialogues or missing codecs. An option to run it externally wouldn't be bad.