title: Htaccess and watermark
body: <p>I want to  know if it is possible to protect images in my host that are loaded from outside by adding a watermark using <code>.htaccess</code>?</p>
  
  <p>That is, if another site uses my image URL <code>http://example.com/1.jpg</code> in a img tag in their own websites.</p>
  
  <p>The plan is the when a foreign request comes to my host, I add a watermark to it and send it to the user browsing the foreign site.</p>