✨ feat: add payment (#132) (#250)

payment/gateway/epay/client.go

@@ -0,0 +1,80 @@
+package epay
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"sort"
+	"strings"
+
+	"github.com/mitchellh/mapstructure"
+)
+
+type Client struct {
+	PayDomain string `json:"pay_domain"`
+	PartnerID string `json:"partner_id"`
+	Key       string `json:"key"`
+}
+
+// FormPay 表单支付
+func (c *Client) FormPay(args *PayArgs) (string, map[string]string, error) {
+	formPayArgs := map[string]string{
+		"type":         string(args.Type),
+		"pid":          c.PartnerID,
+		"out_trade_no": args.OutTradeNo,
+		"notify_url":   args.NotifyUrl,
+		"return_url":   args.ReturnUrl,
+		"name":         args.Name,
+		"money":        args.Money,
+		// "device":       string(args.Device),
+	}
+
+	formPayArgs["sign"] = c.Sign(formPayArgs)
+	formPayArgs["sign_type"] = FormArgsSignType
+
+	domain := strings.TrimSuffix(c.PayDomain, "/")
+
+	return domain + FormSubmitUrl, formPayArgs, nil
+
+}
+
+func (c *Client) Verify(params map[string]string) (*PaymentResult, bool) {
+	sign := params["sign"]
+	tradeStatus := params["trade_status"]
+
+	if sign == "" || tradeStatus != TradeStatusSuccess {
+		return nil, false
+	}
+
+	if sign != c.Sign(params) {
+		return nil, false
+	}
+
+	var paymentResult PaymentResult
+	mapstructure.Decode(params, &paymentResult)
+
+	return &paymentResult, true
+}
+
+// Sign 签名
+func (c *Client) Sign(args map[string]string) string {
+	keys := make([]string, 0, len(args))
+	for k := range args {
+		if k != "sign" && k != "sign_type" && args[k] != "" {
+			keys = append(keys, k)
+		}
+	}
+
+	sort.Strings(keys)
+
+	signStrs := make([]string, len(keys))
+	for i, k := range keys {
+		signStrs[i] = k + "=" + args[k]
+	}
+
+	signStr := strings.Join(signStrs, "&") + c.Key
+
+	h := md5.New()
+	h.Write([]byte(signStr))
+
+	return hex.EncodeToString(h.Sum(nil))
+}

payment/gateway/epay/payment.go

@@ -0,0 +1,91 @@
+package epay
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"one-api/payment/types"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+)
+
+type Epay struct{}
+
+type EpayConfig struct {
+	PayType PayType `json:"pay_type"`
+	Client
+}
+
+func (e *Epay) Name() string {
+	return "易支付"
+}
+
+func (e *Epay) Pay(config *types.PayConfig, gatewayConfig string) (*types.PayRequest, error) {
+	epayConfig, err := getEpayConfig(gatewayConfig)
+	if err != nil {
+		return nil, err
+	}
+
+	payArgs := &PayArgs{
+		Type:       epayConfig.PayType,
+		OutTradeNo: config.TradeNo,
+		NotifyUrl:  config.NotifyURL,
+		ReturnUrl:  config.ReturnURL,
+		Name:       config.TradeNo,
+		Money:      strconv.FormatFloat(config.Money, 'f', 2, 64),
+	}
+
+	formPayURL, formPayArgs, err := epayConfig.FormPay(payArgs)
+	if err != nil {
+		return nil, err
+	}
+
+	payRequest := &types.PayRequest{
+		Type: 1,
+		Data: types.PayRequestData{
+			URL:    formPayURL,
+			Params: &formPayArgs,
+			Method: http.MethodPost,
+		},
+	}
+
+	return payRequest, nil
+}
+
+func (e *Epay) HandleCallback(c *gin.Context, gatewayConfig string) (*types.PayNotify, error) {
+	queryMap := make(map[string]string)
+	if err := c.ShouldBindQuery(&queryMap); err != nil {
+		c.Writer.Write([]byte("fail"))
+		return nil, err
+	}
+
+	epayConfig, err := getEpayConfig(gatewayConfig)
+	if err != nil {
+		c.Writer.Write([]byte("fail"))
+		return nil, fmt.Errorf("tradeNo: %s, PaymentNo: %s,  err: %v", queryMap["out_trade_no"], queryMap["trade_no"], err)
+	}
+
+	paymentResult, success := epayConfig.Verify(queryMap)
+	if paymentResult != nil && success {
+		c.Writer.Write([]byte("success"))
+		payNotify := &types.PayNotify{
+			TradeNo:   paymentResult.OutTradeNo,
+			GatewayNo: paymentResult.TradeNo,
+		}
+		return payNotify, nil
+	}
+
+	c.Writer.Write([]byte("fail"))
+	return nil, fmt.Errorf("tradeNo: %s, PaymentNo: %s,  Verify Sign failed", queryMap["out_trade_no"], queryMap["trade_no"])
+}
+
+func getEpayConfig(gatewayConfig string) (*EpayConfig, error) {
+	var epayConfig EpayConfig
+	if err := json.Unmarshal([]byte(gatewayConfig), &epayConfig); err != nil {
+		return nil, errors.New("config error")
+	}
+
+	return &epayConfig, nil
+}

payment/gateway/epay/type.go

@@ -0,0 +1,45 @@
+package epay
+
+type PayType string
+
+var (
+	EpayPay PayType = ""       // 网关
+	Alipay  PayType = "alipay" // 支付宝
+	Wechat  PayType = "wxpay"  // 微信
+	QQ      PayType = "qqpay"  // QQ
+	Bank    PayType = "bank"   // 银行
+	JD      PayType = "jdpay"  // 京东
+	PayPal  PayType = "paypal" // PayPal
+	USDT    PayType = "usdt"   // USDT
+)
+
+// type DeviceType string
+
+// var (
+// 	PC     DeviceType = "pc"     // PC
+// 	Mobile DeviceType = "mobile" // 移动端
+// )
+
+const (
+	FormArgsSignType   = "MD5"
+	FormSubmitUrl      = "/submit.php"
+	TradeStatusSuccess = "TRADE_SUCCESS"
+)
+
+type PayArgs struct {
+	Type       PayType `json:"type,omitempty"`
+	OutTradeNo string  `json:"out_trade_no"`
+	NotifyUrl  string  `json:"notify_url"`
+	ReturnUrl  string  `json:"return_url"`
+	Name       string  `json:"name"`
+	Money      string  `json:"money"`
+}
+
+type PaymentResult struct {
+	Type        PayType `mapstructure:"type"`
+	TradeNo     string  `mapstructure:"trade_no"`
+	OutTradeNo  string  `mapstructure:"out_trade_no"`
+	Name        string  `mapstructure:"name"`
+	Money       string  `mapstructure:"money"`
+	TradeStatus string  `mapstructure:"trade_status"`
+}