Sitemap.xml content type is text/html (with CDN module)

Hi there,

There are so many issues about content types and so many and diverse answers that honestly I got overwhelmed.

I'm using XMLSiteMap (6.x-2.0-beta3) on a site with Varnish (reverse-proxy) on top, and I have many custom caching options, so I have no idea if this is due to the module, to Drupal or to the caching stuff but...

For some reason, both my sitemap.xml and sitemap.xsl show HTTP headers of Content-Type: text/html.

This effectively breaks the sitemap feature for humans. After a little search, I found out in xmlsitemap.pages.inc that the calls to drupal_set_header(), in particular the ones trying to set the Content-Type header, could be beneficially replaced by a simple:

header('Content-type: text/xml; charset=utf-8');

This hacks away the text/html problem (which must be coming from something behind drupal_set_header() but I have no time to investigate right now. This has to be done both for sitemap.xml and sitemap.xsl.

I'm leaving this bug report open but feel free to close as you please. I will try to provide more information if that helps (not sure it does since I'm only in beta3).

Great work, anyway!