django在接受post请求时显示403forbidden实例解析

Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.
Forbidden (CSRF cookie not set.): /
[23/Mar/2017 20:58:36] "POST / HTTP/1.1" 403 2857

# coding=utf-8

from django.http import HttpResponse
from django.views.decorators.csrf import csrf_exempt
import json


# Create your views here.
@csrf_exempt
def index(request):
  if request.method == 'POST':
    body = json.loads(request.body)
    print body['value']
    return HttpResponse(request.body)

Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.
test
[23/Mar/2017 21:03:37] "POST / HTTP/1.1" 200 17