title: Setting Custom HTTP Header for GWT Forms
body: <p>How can I set additional HTTP headers while submitting forms with GWT. <br>
  (I am using FormPanel for building the form)</p>
  
  <hr>
  
  <p><strong>Summary</strong></p>
  
  <p><strong>From accepted answer:</strong></p>
  
  <blockquote>
    <p>HTTP headers cannot be set using FormPanel - FormPanel wraps the standard HTML <code>&lt;form&gt;</code>, which doesn't allow setting custom headers.</p>
  </blockquote>