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在 Next.js 应用中添加 Stripe Checkout 的提示

AI 代理提示:为 Next.js App Router 项目添加 Stripe Checkout,包括 webhook 处理、客户门户和订阅状态。

CursorClaude CodeCodexWindsurf Next.jsPostgreSQLTypeScript
.md .json 难度: 困难 更新于 2026年6月8日

将此提示提供给您的代理,以实现完整的 Stripe 计费流程——包括结账会话创建、webhook 处理、客户门户和订阅状态控制——并确保正确的 webhook 签名验证,且不在客户端代码中包含密钥。

主要提示

Main Prompt
You are working in a Next.js 15 App Router project with TypeScript and PostgreSQL.
Auth is already set up with a `getSession()` helper. The pricing page already defines
`PLANS` with Stripe Price IDs.
Task: wire up Stripe Checkout for subscription billing.
Requirements:
- Install `stripe` (server-only) and `@stripe/stripe-js` (client). Do NOT import `stripe` in
Client Components or expose `STRIPE_SECRET_KEY` to the browser.
- Create `src/lib/stripe.ts`: export a singleton Stripe client using `STRIPE_SECRET_KEY`.
- Create a Server Action `src/lib/actions/create-checkout.ts`:
- Get the current user session; return an error if not authenticated.
- Create a Stripe Checkout Session in `subscription` mode.
- Set `success_url` to `/dashboard?session_id={CHECKOUT_SESSION_ID}`.
- Set `cancel_url` to `/pricing`.
- Store the Stripe `customerId` in the `users` table (`stripe_customer_id` column).
- Return the Checkout Session URL.
- Create `src/app/api/stripe/webhook/route.ts`:
- Read the raw body using `request.text()`.
- Verify the signature using `stripe.webhooks.constructEvent(body, sig, STRIPE_WEBHOOK_SECRET)`.
- Handle events: `checkout.session.completed`, `customer.subscription.updated`,
`customer.subscription.deleted`.
- On each event, update the `users` table: set `subscription_status` and `subscription_tier`.
- Return `{ received: true }` with status 200.
- On signature failure, return 400.
- Create `src/lib/actions/create-portal.ts`: create a Stripe Customer Portal session and return the URL.
- Add a PostgreSQL migration `migrations/0011_add_stripe_columns.sql` adding
`stripe_customer_id TEXT`, `subscription_status TEXT`, `subscription_tier TEXT` to `users`.
- Add all Stripe keys to `.env.example`: `STRIPE_SECRET_KEY`, `STRIPE_WEBHOOK_SECRET`,
`NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY`.
- Do NOT use the deprecated `stripe.charges` API. Use Payment Intents / Checkout Sessions only.
Stop and list all planned file changes before writing any code.

实现说明

  • Webhook 签名验证需要原始请求正文——如果先将其解析为 JSON,签名检查将失败。请使用 request.text() 而非 request.json()
  • 必须通过路由配置将 webhook 处理程序排除在 Next.js 的请求体大小限制之外:export const config = { api: { bodyParser: false } }(Pages Router)——在 App Router 中,使用 export const dynamic = 'force-dynamic' 并直接读取流。
  • 使用 Stripe CLI 在本地测试 webhook:stripe listen --forward-to localhost:3000/api/stripe/webhook
  • 在首次结账时存储 stripe_customer_id,以避免创建重复的 Stripe 客户。

预期文件变更

src/lib/stripe.ts (new)
src/lib/actions/create-checkout.ts (new — Server Action)
src/lib/actions/create-portal.ts (new — Server Action)
src/app/api/stripe/webhook/route.ts (new — Route Handler)
migrations/0011_add_stripe_columns.sql (new)
.env.example (edited)
package.json (edited)

验收标准

  • 点击定价 CTA 可重定向到 Stripe Checkout 并选择正确的套餐。
  • 完成测试结账后,PostgreSQL 中的 subscription_status 会更新为 'active'
  • Stripe 客户门户链接重定向到 Stripe 托管的门户。
  • 通过 Stripe CLI 发送测试 customer.subscription.deleted 事件可将 subscription_status 设置为 'canceled'
  • 签名无效的 webhook 返回 HTTP 400。

测试命令

Terminal window
bun add stripe @stripe/stripe-js
psql "$DATABASE_URL" -f migrations/0011_add_stripe_columns.sql
bun run typecheck
bun run dev &
stripe listen --forward-to localhost:3000/api/stripe/webhook
stripe trigger checkout.session.completed
# verify users table updated
psql "$DATABASE_URL" -c "SELECT stripe_customer_id, subscription_status FROM users LIMIT 5;"

常见的 AI 错误

  • 在客户端组件中导入 stripe(服务器 SDK),从而暴露 STRIPE_SECRET_KEY
  • 在签名验证之前将 webhook 正文解析为 JSON,导致所有 webhook 验证失败。
  • 每次结账时都创建新的 Stripe 客户,而不是重用 stripe_customer_id
  • 使用已弃用的 stripe.charges.create 而非 stripe.checkout.sessions.create

修复提示

Fix Prompt
Webhook signature verification fails with `No signatures found matching the expected signature`.
Fix in order:
1. In the webhook route, replace `await request.json()` with `const body = await request.text()`.
2. Ensure `stripe.webhooks.constructEvent(body, sig, process.env.STRIPE_WEBHOOK_SECRET!)` receives
the raw string body, not a parsed object.
3. Add `export const dynamic = 'force-dynamic'` at the top of the route file.
Show only the corrected route handler diff.