view.html.erb

<%-
  base_url  = "/node/#{host}/#{port}"
  login_url = "#{base_url}/login"
  next_url  = "#{base_url}/#{jupyter_api}"

  full_url="#{login_url}?next=#{CGI.escape(next_url)}"
  form_id = "juypyter_form#{login_url.gsub('/', '_')}"
%>

<!-- Zoom on iPad doesn't like opening in a new tab. It won't foward the form parameters. -->
<script type="text/javascript">
  function changeTarget() {
    const agent = navigator.userAgent;
    if (/Mozilla\/5\.0 \(Macintosh; Intel Mac OS X \d+_\d+_\d+\) AppleWebKit\/\d+\.\d+\.\d+ \(KHTML, like Gecko\)/.test(agent)) {
      document.getElementById("<%= form_id %>").target = "_self";
    }
  }
</script>

<form id="<%= form_id %>" action="<%= full_url %>" method="post" target="_blank" onsubmit="changeTarget()" >
  <input type="hidden" name="password" value="<%= password %>">
  <button class="btn btn-primary" type="submit">
    <i class="fa fa-cogs"></i> Connect to Jupyter
  </button>
</form>