AJAX中缺少CSRF令牌

Question

I am trying to build a ajax powered like button, but the ajax code is not working.

views.py
def like_button(request,postid):
    postresult=get_object_or_404(post,id=postid)
    if postresult.user_like.filter(id=request.user.id).exists():
        postresult.user_like.remove(request.user)
    else:
        postresult.user_like.add(request.user)
    noresdat=postresult.totallikes
    response_data_to_dump={'success': True,'likes':noresdat}
    data = json.dumps(response_data_to_dump)
    return HttpResponse(data, content_type='application/json')

while template is as follows:-

{% for p in result %}
    <div class="SpriteContainer"> 
      <a class="postlike" href="/like/{{ p.id }}"><img src="{%static "/images/icons/heart.png" %}"/></a>
      <p class="nolike" style="display: inline-block;">{{ p.totallikes }}</p></div>
    {% endfor %}
<script>
    var csrftoken = $("[name=csrfmiddlewaretoken]").val();
    $(".postlike").click(function(e){
      e.preventDefault();
      var $this = $(this);
      var url = $(this).data("action");
      $.post(url, function(response){
      if(response && response.success==true)
      $this.next(".nolike").text(response.likes);
  });
});