title: How to crawl only HTML in Nutch?
body: <p>Is it possible to crawl/fetch only plain HTML pages via Nutch (i.e. no pictures, video, flash, excel, exe, pdf or word files)?</p>
  
  <p>How to check <code>Content-Type</code> of the page and fetch only <code>text/html</code> pages via Nutch?</p>