title: accept POST request from specific site in django
body: <p>I want to serve files via HTTP, but want to accept requests only from the same site (that's working fine) AND from an specific external app (not written in python nor django).</p>
  
  <p>Is this possible? I'd prefer not to disable CSRF protection for the view. </p>
  
  <p>If disabling CSRF protection is the only way, how can I prevent request from other external sites? </p>