init: initial commit

utils/wechat/access_token.go

@@ -0,0 +1,54 @@
+package wechat
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"io"
+	"log"
+	"net/http"
+	"sundynix-go/global"
+	"time"
+
+	"github.com/redis/go-redis/v9"
+)
+
+// GetMiniAccessToken 获取小程序的access_token
+func GetMiniAccessToken() string {
+	ak, err := global.Redis.Get(context.Background(), "mini_access_token").Result()
+	if errors.Is(err, redis.Nil) {
+		// 从微信服务器获取
+		//重新从微信服务器获取
+		url := "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + global.Config.MiniProgram.AppId + "&secret=" + global.Config.MiniProgram.AppSecret
+		resp, err := http.Get(url)
+		if err != nil {
+			log.Fatalf("Error making GET request: %s", err)
+		}
+		defer func(Body io.ReadCloser) {
+			err := Body.Close()
+			if err != nil {
+				log.Fatalf("Error closing response body: %s", err)
+			}
+		}(resp.Body)
+		body, err := io.ReadAll(resp.Body)
+		if err != nil {
+			log.Fatalf("Error reading response body: %s", err)
+		}
+		res := string(body)
+
+		var data map[string]interface{}
+		err = json.Unmarshal([]byte(res), &data)
+		if err != nil {
+			log.Fatalf("Error unmarshalling JSON: %s", err)
+		}
+		ak = data["access_token"].(string)
+		ex := data["expires_in"].(float64)
+		global.Redis.Set(context.Background(), "mini_access_token", ak, time.Duration(ex)*time.Second) //秒
+	} else if err != nil {
+		log.Fatalf("Error getting access token from Redis: %s", err)
+	} else {
+		return ak
+	}
+	return ak
+
+}

utils/wechat/pay.go

@@ -0,0 +1,39 @@
+package wechat
+
+import (
+	"context"
+	"fmt"
+	"sundynix-go/global"
+
+	"github.com/wechatpay-apiv3/wechatpay-go/core"
+	"github.com/wechatpay-apiv3/wechatpay-go/core/option"
+	"github.com/wechatpay-apiv3/wechatpay-go/utils"
+)
+
+// GetWxPayClient 初始化微信支付客户端
+func GetWxPayClient() (*core.Client, error) {
+
+	//2.加载私钥
+	mchPrivateKey, err := utils.LoadPrivateKeyWithPath(global.Config.WechatPay.PrivateKeyPath)
+	if err != nil {
+		return nil, err
+	}
+	mchPublicKey, err := utils.LoadPublicKeyWithPath(global.Config.WechatPay.PublicKeyPath)
+	if err != nil {
+		return nil, err
+	}
+	ctx := context.Background()
+	// 3. 创建客户端配置 使用商户私钥等初始化 client，并使它具有自动定时获取微信支付平台证书的能力
+	opts := []core.ClientOption{
+		option.WithWechatPayPublicKeyAuthCipher(global.Config.WechatPay.MchId,
+			global.Config.WechatPay.MchCertificateSerialNumber,
+			mchPrivateKey, global.Config.WechatPay.PublicKeyId, mchPublicKey), // 自动处理签名/验签
+	}
+	client, err := core.NewClient(ctx, opts...)
+
+	if err != nil {
+		fmt.Printf("new wechat pay client err:%s", err)
+	}
+	return client, err
+
+}