PayPal API 计费验证失败（Python Flask）

Question

我在使用 PayPal API 创建计费计划和处理订阅时遇到身份验证失败问题。这是我收到的错误消息：

{"name":"AUTHENTICATION_FAILURE","message":"Authentication failed due to invalid authentication credentials or a missing Authorization header.","links":[{"href":"https://developer.paypal.com/docs/api/overview/#error","rel":"information_link"}]}

尝试访问 URL 时会出现此错误

https://api.sandbox.paypal.com/v1/payments/billing-plans/P-0N9306909M1752927SPMWBYI.

下面是我的代码：

PAYPAL_CLIENT_ID = os.environ.get('PAYPAL_CLIENT_ID')
PAYPAL_CLIENT_SECRET = os.environ.get('PAYPAL_CLIENT_SECRET')

import paypalrestsdk

def create_billing_plan(name, description, type, frequency, frequency_interval, cycles, amount, credits_to_add, credits_price):
    try:
        paypalrestsdk.configure({
            'mode': 'sandbox',  # Change to 'live' for production
            'client_id': PAYPAL_CLIENT_ID,
            'client_secret': PAYPAL_CLIENT_SECRET
        })

        billing_plan_attributes = {
            "name": name,
            "description": description,
            "type": type,
            "payment_definitions": [{
                "name": "Regular Payment",
                "type": "REGULAR",
                "frequency": frequency,
                "frequency_interval": frequency_interval,
                "cycles": cycles,
                "amount": {
                    "value": amount,
                    "currency": "USD"
                }
            }],
            "merchant_preferences": {
                "auto_bill_amount": "yes",
                "cancel_url": url_for('payment_cancel', _external=True),
                "return_url": url_for('payment_success', _external=True)
            }
        }

        billing_plan = paypalrestsdk.BillingPlan(billing_plan_attributes)
        if billing_plan.create():
            approval_urls = [link.href for link in billing_plan.links if link.rel == 'approval_url']
            if approval_urls:
                return approval_urls[0]
            else:
                self_urls = [link.href for link in billing_plan.links if link.rel == 'self']
                if self_urls:
                    return self_urls[0]
                else:
                    print('Failed to retrieve payment redirect URL.')
                    print('Billing Plan Links:', billing_plan.links)
                    return None
        else:
            error_message = f"Failed to create billing plan: {billing_plan.error}"
            print(error_message)
            print('Billing Plan Response:', billing_plan.to_dict())
            return None
    except paypalrestsdk.exceptions.UnauthorizedAccess as e:
        print(f"Authentication failed: {e}")
        flash('Failed to authenticate with PayPal.', 'danger')
        return None


@app.route('/purchase', methods=['POST'])
@login_required
def purchase_subscription():
    plan = request.form.get('plan')
    selected_gateway = request.form.get('payment_gateway')
    plan_settings = get_plan_settings()

    if not plan_settings:
        flash('Failed to fetch plan settings from the database.', 'danger')
        return redirect(url_for('subscription'))

    credits_to_add = 0
    credits_price = 0
    subscription_type = None
    subscription_start_date = None
    subscription_end_date = None

    subscription_type_mapping = {
        'plan1': 'monthly',
        'plan2': 'monthly',
        'plan3': 'monthly',
        'plan4': 'yearly',
        'plan5': 'yearly',
        'plan6': 'yearly'
    }

    if plan in subscription_type_mapping:
        subscription_type = subscription_type_mapping[plan]
        if subscription_type == 'monthly':
            frequency = "MONTH"
        elif subscription_type == 'yearly':
            frequency = "YEAR"
        
        credits_to_add = plan_settings[plan + "_credits"]
        credits_price = plan_settings[plan + "_price"]
    else:
        flash('Invalid plan selected.', 'danger')
        return redirect(url_for('subscription'))

    redirect_url = create_billing_plan(
        name=f"{plan.capitalize()} Subscription", 
        description=f"{plan.capitalize()} Subscription", 
        type="INFINITE",
        frequency=frequency,
        frequency_interval="1",
        cycles="0",
        amount=str(credits_price),
        credits_to_add=credits_to_add,
        credits_price=credits_price
    )

    if redirect_url:
        return redirect(redirect_url)  # Redirect user to PayPal
    else:
        flash('Failed to initiate payment.', 'danger')
        return redirect(url_for('subscription'))

• 它定义了使用 PayPal SDK 创建计费计划和处理订阅购买的功能。
• create_billing_plan 函数使用沙盒模式配置 PayPal SDK，并尝试使用提供的属性创建计费计划。
• purchase_subscription 路由通过检索计划设置、确定订阅类型并使用 create_billing_plan 函数创建计费计划来处理订阅购买。

尽管使用正确的客户端 ID 和客户端密码配置 PayPal SDK，但我仍然遇到身份验证失败的情况。

任何有关如何排查和解决此问题的见解或建议将不胜感激。

谢谢！

Answer 1

/v1/付款/计费计划已长期弃用，不应用于任何新的 PayPal 集成

请参阅订阅概述了解当前集成。

在撰写本文时，所有服务器端 PayPal SDK 均已弃用，不应使用任何 SDK。使用直接HTTPS API调用首先获取access_token，然后发送请求并读取JSON格式的响应。