title: How can I make EventSource work with any Content-Type header?
body: <p>I have a server which sends data exactly in the format expected by the SSE client, but Chrome closes the connection immediately as it gets the Content-Type header with this message: <code>EventSource's response has a MIME type ("text/plain") that is not "text/event-stream". Aborting the connection.</code></p>
  
  <p>Is it possible to make <code>EventSource</code> work even if the server doesn't set the appropriate <code>text/event-stream</code> content type?</p>