wangjia
6da6964451
- Go/Gin/GORM + 纯 Go SQLite（无 cgo） - Channel 多渠道接口：支付宝当面付(precreate)/电脑网站支付(page.pay) 已实现，微信占位 - 多商户 merchants 表，回调验签+金额核对+幂等+查单兜底 - 收款页/结果页/二维码端点；docs/ 设计文档与部署 Runbook - 密钥走环境变量/Bitwarden，不入库 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
104 lines
3.3 KiB
Go
104 lines
3.3 KiB
Go
package channel
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import (
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"context"
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"fmt"
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"net/http"
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"github.com/smartwalle/alipay/v3"
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"github.com/wangjia/pay/internal/model"
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)
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type alipayChannel struct {
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client *alipay.Client
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}
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func newAlipay(m *model.Merchant) (Channel, error) {
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if m.AppID == "" || m.AppPrivateKey == "" || m.AlipayPublicKey == "" {
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return nil, fmt.Errorf("商户 %s 的支付宝凭证不完整（app_id/app_private_key/alipay_public_key）", m.Code)
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}
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client, err := alipay.New(m.AppID, m.AppPrivateKey, m.Production)
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if err != nil {
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return nil, fmt.Errorf("初始化支付宝客户端失败: %w", err)
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}
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// 公钥模式（沙箱常用）。若改用证书模式，这里换成 LoadAppCertPublicKey 等。
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if err := client.LoadAliPayPublicKey(m.AlipayPublicKey); err != nil {
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return nil, fmt.Errorf("加载支付宝公钥失败: %w", err)
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}
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return &alipayChannel{client: client}, nil
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}
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func (a *alipayChannel) Name() string { return "alipay" }
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func (a *alipayChannel) PagePay(_ context.Context, req CreateReq) (string, error) {
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var p = alipay.TradePagePay{}
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p.OutTradeNo = req.OutTradeNo
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p.Subject = req.Subject
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p.TotalAmount = req.Amount
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p.ProductCode = "FAST_INSTANT_TRADE_PAY"
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p.NotifyURL = req.NotifyURL
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p.ReturnURL = req.ReturnURL
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u, err := a.client.TradePagePay(p)
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if err != nil {
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return "", fmt.Errorf("支付宝下单失败: %w", err)
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}
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return u.String(), nil
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}
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func (a *alipayChannel) PreCreate(ctx context.Context, req CreateReq) (string, error) {
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var p = alipay.TradePreCreate{}
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p.OutTradeNo = req.OutTradeNo
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p.Subject = req.Subject
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p.TotalAmount = req.Amount
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p.NotifyURL = req.NotifyURL
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rsp, err := a.client.TradePreCreate(ctx, p)
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if err != nil {
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return "", fmt.Errorf("支付宝预下单调用失败: %w", err)
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}
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if rsp.IsFailure() {
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return "", fmt.Errorf("支付宝预下单失败: %s / %s", rsp.Msg, rsp.SubMsg)
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}
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return rsp.QRCode, nil
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}
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func (a *alipayChannel) VerifyNotify(ctx context.Context, r *http.Request) (*NotifyResult, error) {
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if err := r.ParseForm(); err != nil {
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return nil, fmt.Errorf("解析回调表单失败: %w", err)
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}
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// DecodeNotification 内部用已加载的支付宝公钥验签，验签不过会返回错误。
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noti, err := a.client.DecodeNotification(ctx, r.Form)
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if err != nil {
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return nil, fmt.Errorf("回调验签失败: %w", err)
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}
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paid := noti.TradeStatus == alipay.TradeStatusSuccess || noti.TradeStatus == alipay.TradeStatusFinished
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return &NotifyResult{
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OutTradeNo: noti.OutTradeNo,
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TradeNo: noti.TradeNo,
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Amount: noti.TotalAmount,
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BuyerLogonID: noti.BuyerLogonId,
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Paid: paid,
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Raw: r.Form.Encode(),
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}, nil
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}
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func (a *alipayChannel) Query(ctx context.Context, outTradeNo string) (*QueryResult, error) {
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var p = alipay.TradeQuery{OutTradeNo: outTradeNo}
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rsp, err := a.client.TradeQuery(ctx, p)
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if err != nil {
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return nil, fmt.Errorf("支付宝查单调用失败: %w", err)
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}
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if rsp.IsFailure() {
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// 交易不存在（TRADE_NOT_EXIST）等：视为未找到，不报错，交由上层决定。
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return &QueryResult{Found: false}, nil
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}
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paid := rsp.TradeStatus == alipay.TradeStatusSuccess || rsp.TradeStatus == alipay.TradeStatusFinished
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return &QueryResult{
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Found: true,
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OutTradeNo: rsp.OutTradeNo,
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TradeNo: rsp.TradeNo,
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Amount: rsp.TotalAmount,
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Paid: paid,
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}, nil
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}
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