Ruby on Rails 7集成Stripe Webhooks时遭遇400 Bad Request错误

我被这个问题困扰已久，期间转去开发其他项目，今日回到该项目后问题仍未解决。

当前业务流程：

• 用户提交剧本表单
• 跳转至Stripe Checkout
• Webhooks监听checkout.session.completed事件
• 会话完成后将is_paid字段更新为TRUE

步骤1和2正常运行，但步骤3和4失效，执行流程时出现以下错误：

• [400] POST http://localhost:3000/webhooks
• Completed 400 Bad Request

我原本以为是webhook密钥问题，已确认使用的是Stripe CLI执行stripe listen --forward-to localhost:3000/webhooks时给出的签名密钥，且执行stripe trigger checkout.session.completed时触发成功，排除密钥错误可能，完全不清楚问题所在，求排查方向。

ScreenplaysController中的create方法 #

def create
  @screenplay = current_user.screenplays.new(screenplay_params)

  if @screenplay.save
    session = Stripe::Checkout::Session.create({
      line_items: [{
        price: "notrealforobviousreasons",
        quantity: 1,
      }],
      mode: "payment",
      metadata: { screenplay_id: @screenplay.id },
      customer_email: current_user.email,
      success_url: dashboard_url,
      cancel_url: dashboard_url,
      })
      redirect_to session.url, allow_other_host: true
  else
    render :new, status: :unprocessable_entity
  end
end

WebhooksController #

class WebhooksController < ApplicationController
  skip_before_action :verify_authenticity_token

  def create
    event = nil
    sig_header = request.env["HTTP_STRIPE_SIGNATURE"]
    payload = request.body.read
    endpoint_secret = Rails.application.credentials.dig(:stripe, :webhook_secret)

    begin
      event = Stripe::Webhook.construct_event(
        sig_header, payload, endpoint_secret
      )
    rescue JSON::ParserError => e
      head 400
      return
    rescue Stripe::SignatureVerificationError => e
      head 400
      return
    end

    case event.type
    when "checkout.session.completed"
      session = event.data.object

      @screenplay = Screenplay.find_by(id: session.metadata.screenplay_id)
      @screenplay.update(is_paid: true)
    end
  end
end

开发环境凭据 #

stripe:
  publishable_key: notrealforobviousreasons
  secret_key: notrealforobviousreasons
  webhook_secret: notrealforobviousreasons

内容的提问来源于stack exchange，提问作者user19818087