Add alipay provider.

pp/alipay.go

@@ -0,0 +1,65 @@
+// Copyright 2022 The Casdoor Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package pp
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"github.com/go-pay/gopay"
+	"github.com/go-pay/gopay/alipay"
+)
+
+type AlipayPaymentProvider struct {
+	Client *alipay.Client
+}
+
+func NewAlipayPaymentProvider(appId string, appPublicKey string, appPrivateKey string, authorityPublicKey string, authorityRootPublicKey string) *AlipayPaymentProvider {
+	pp := &AlipayPaymentProvider{}
+
+	client, err := alipay.NewClient(appId, appPrivateKey, true)
+	if err != nil {
+		panic(err)
+	}
+
+	err = client.SetCertSnByContent([]byte(appPublicKey), []byte(authorityRootPublicKey), []byte(authorityPublicKey))
+	if err != nil {
+		panic(err)
+	}
+
+	pp.Client = client
+	return pp
+}
+
+func (pp *AlipayPaymentProvider) Pay(productName string, paymentId string, price float64, returnUrl string, notifyUrl string) (string, error) {
+	pp.Client.DebugSwitch = gopay.DebugOn
+
+	priceString := strings.TrimRight(strings.TrimRight(fmt.Sprintf("%.2f", price), "0"), ".")
+
+	bm := gopay.BodyMap{}
+	bm.Set("subject", productName)
+	bm.Set("out_trade_no", paymentId)
+	bm.Set("total_amount", priceString)
+
+	bm.Set("return_url", returnUrl)
+	bm.Set("notify_url", notifyUrl)
+
+	payUrl, err := pp.Client.TradePagePay(context.Background(), bm)
+	if err != nil {
+		return "", err
+	}
+	return payUrl, nil
+}

pp/provider.go

@@ -0,0 +1,26 @@
+// Copyright 2022 The Casdoor Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package pp
+
+type PaymentProvider interface {
+	Pay(productName string, paymentId string, price float64, returnUrl string, notifyUrl string) (string, error)
+}
+
+func GetPaymentProvider(typ string, appId string, appPublicKey string, appPrivateKey string, authorityPublicKey string, authorityRootPublicKey string) PaymentProvider {
+	if typ == "Alipay" {
+		return NewAlipayPaymentProvider(appId, appPublicKey, appPrivateKey, authorityPublicKey, authorityRootPublicKey)
+	}
+	return nil
+}