Django X-CSRF 令牌不能在 javascript 提取中设置

Question

I am trying to generate a csrf token in javascript and use that with a POST request using fetch.我正在尝试在 javascript 中生成一个 csrf 令牌，并将其与使用 fetch 的 POST 请求一起使用。 In my html, I have the following script tag under head to generate the csrf token:在我的 html 中，我在head下有以下脚本标记来生成 csrf 令牌：

<head>
    <script type="text/javascript">
        var user = '{{request.user}}'

        function getCookie(name) {
            let cookieValue = null;
            if (document.cookie && document.cookie !== '') {
                const cookies = document.cookie.split(';');
                for (let i = 0; i < cookies.length; i++) {
                    const cookie = cookies[i].trim();
                    // Does this cookie string begin with the name we want?
                    if (cookie.substring(0, name.length + 1) === (name + '=')) {
                        cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                        break;
                    }
                }
            }
            return cookieValue;
        }
        var csrftoken = getCookie('csrftoken');

        console.log(csrftoken)
    </script>
</head>

Then under body , I have the following script tag where I retrieve the csrftoken variable and pass it to the 'X-CSRFToken' header in fetch() :然后在body下，我有以下脚本标签，我在其中检索 csrftoken 变量并将其传递给fetch()中的'X-CSRFToken' header ：

<body>
    <script type="text/javascript">
        console.log('Hello World')
        console.log(csrftoken)

        var updateButtons = document.getElementsByClassName('update-cart')

        for(i = 0; i < updateButtons.length; i++){
            updateButtons[i].addEventListener('click', function(){
                var productId = this.dataset.product
                var action = this.dataset.action
                console.log('productId: ', productId, 'action: ', action)

                console.log('user: ', user)

                if(user === 'AnonymousUser'){
                    console.log('Not logged in.')
                }else{
                    updateUserOrder(productId, action)
                }
            })
        }

        function updateUserOrder(productId, action){
            console.log('User is authenticated. Sending data...')
            console.log(csrftoken)

            var url = '/update_item/'

            fetch(url, {
                method: 'POST',
                headers: {
                    'Content-Type':'application/json',
                    'X-CSRFToken':csrftoken,
                },
                body: JSON.stringify({'productId': productId, 'action': action})
            })

            .then((response) => {
                return response.json()
            })

            .then((data) => {
                console.log('data: ', data)
            })
        }
    </script>
</body>

The csrftoken variable is displayed by all the console.log() calls but I still get the following exceptions:所有console.log()调用都会显示csrftoken变量，但我仍然遇到以下异常：

(index):169 POST http://127.0.0.1:8000/update_item/ 500 (Internal Server Error)
updateUserOrder
Uncaught (in promise) SyntaxError: Unexpected token < in JSON at position 0

views.py,视图.py,

def update_item(request):
    data = json.loads(request.data)
    product_id = data['productId']
    action = data['action']

    print('action: ', action)
    print('product_id: ', product_id)

    customer = request.user.customer
    product = Product.objects.get(id=product_id)

    order, created = Order.objects.get_or_create(customer=customer, complete=False)
    orderitem, created = OrderItem.objects.get_or_create(order=order, product=product)

    if action == 'add':
        orderitem.quantity += 1
    elif action == 'remove':
        orderitem.quantity -= 1

    orderitem.save()

    if orderitem.quantity <= 0:
        orderitem.delete()

    return JsonResponse('Item was added.', safe=False)

I cannot seem to figure out whether it is a syntax error or if I am setting the 'X-CSRFToken' header wrong.我似乎无法弄清楚这是语法错误还是我将“X-CSRFToken” header 设置错误。 Other similar answers did not help.其他类似的答案没有帮助。

Answer 1

Solved.解决了。 It was not an issue with my javascript or the csrftoken variable therein.我的 javascript 或其中的 csrftoken 变量不是问题。 Rather it was in my server code.而是在我的服务器代码中。 In views.py, I typed data = json.loads(request.data) .在 views.py 中，我输入data = json.loads(request.data) 。 But it should be data = json.loads(request.body) .但它应该是data = json.loads(request.body) 。

Django X-CSRF 令牌不能在 javascript 提取中设置

问题描述

1 个解决方案

解决方案1
0 已采纳 2020-11-28 11:00:35

Django X-CSRF 令牌不能在 javascript 提取中设置

问题描述

1 个解决方案

解决方案1 0 已采纳 2020-11-28 11:00:35

解决方案1
0 已采纳 2020-11-28 11:00:35