Can I change the content-type of files deployed on s3

[ichiragshah]

I want to change the content-type of sitemap.xml to text/xml. By default, it goes application/octet-stream and get downloaded.

How can I make sure it's always text/xml?

[john-shaffer]

Looks like in MimeTypes.php, you need something like this around line 14:

$wp_mime_types['xml'] = 'text/xml; charset=UTF-8';