piechart_with_form.erb

<div class="container">
  <div class="col-xs-12">
    <h1>A Pie made of IP Addresses</h1>
    <hr>
    <form action='/timeline' method='post' enctype='multipart/form-data'>
      <div class="form-group">
        <div class="input-group input-group-lg">
          <span class="input-group-addon">
            <i class="glyphicon glyphicon-screenshot"></i>
          </span>
          <input class="form-control" placeholder="IP Address" name="ip" type="text" required>
          <span class="input-group-btn">
            <button class="btn btn-primary" type="button submit"> Search </button>
          </span>
        </div>
      </div>
    </form>
    <hr>
    <% if @piechart %>
      <%= pie_chart(@piechart, height: "600px")%>
    <% else %>
      <p>No data...</p>
    <% end %>
  </div>
</div>