You'd also have to account for other XML Content-types, such as application/xml, application/xhtml+xml, application/rdf+xml, and so on.

Something like this might work:

if ($content_type =~ m!(application|text)/(.*\+)?xml!) {
  # Treat as XML
}

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In reply to Re^2: xml/html detection script by dorward
in thread xml/html detection script by slloyd

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