Flask 在返回重定向时不断重复请求

返回重定向时请求不断重复。

我制作了一个按钮来发送删除请求，它将使用键“order_list”删除会话数据，但它会继续进行重定向，直到浏览器停止为止

cart_order.html

<script>
  function clearQuery() {
    fetch("/cart", {
      method: "DELETE",
      headers: {
        "Content-Type": "application/json",
      },
    })
      .then((response) => {
        if (response.ok) {
          return response.json();
        }
        throw new Error("Network response was not ok.");
      })
      .then((data) => {
        console.log("All orders have been deleted");
      })
      .catch((error) => {
        console.error("Error deleting orders", error);
      });
  }
</script>
<button onclick="clearQuery()">Clear Query</button>

烧瓶

from flask import Flask, render_template, redirect, url_for, session, request

app = Flask(__name__)
app.secret_key = 'THIS_IS_SECRET_KEY'


@app.route('/cart', methods=["GET", "DELETE"])
def cart():

    # for demonstration
    session['order_list'] = {
        'order_1': {
            'marker': True,
            'color': 'blue'
        },
        'order_2': {
            'marker': True,
            'color': 'red'
        },
        'order_3': {
            'marker': True,
            'color': 'blue'
        }
    }

    if request.method == "GET":
        if 'order_list' in session:
            print(session['order_list'])
        else:
            print(session)

        return render_template('cart_order.html')

    elif request.method == "DELETE":

        session.pop('order_list')
        session.modified = True

        return redirect(url_for('cart'))


if __name__ == "__main__":
    app.run(debug=True)

我希望删除带有“order_list”键的会话数据，然后使用 GET 请求重定向回自身，并打印现在应该为空的会话