feat: handle download links

[ShGKme]

☑️ Resolves

• Fix: Feature Request: Direct File Download in Nextcloud Talk on Desktop #824
• Fix: Bug download file from APP #753
• Requires: feat(chat): add download link to attachments spreed#13618

Unfortunately, there is no better way to handle download links. Electron doesn't handle it, doesn't trigger will-download nor allows detecting that the link was a download link in will-navigate

🖼️ Screenshots

[Antreesy]

Tested

If download attr doesn't specify file extension, it's not considered for file name suggestion:

UPD: same for specified .json extension:

Something to fix in Talk only?

[ShGKme]

If download attr doesn't specify file extension, it's not considered for file name suggestion:

Is there an example where we have it?

Poll export is .json

And for me it works fine in both cases:

• download value is without extension
• file url is without extensions

[ShGKme]

Checked with @Antreesy.

The problem is that download attribute value is ignored, and neither inline data:* URL, nor URL.createObjectURL allows explicitly setting a filename. As the result, suggested filename is either download.json or UUID from objectURL instead of the download attribute.

[Antreesy]

Remarkable workaround 🙈

Tested. For me the record, file extension should be always provided

[ShGKme]

Tested. For me the record, file extension should be always provided

The filename is defined the same as in a web-browser - via the download attribute. The extension must be provided there.