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@@ -0,0 +1,74 @@
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+//==================================
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+// * Name：Jerry
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+// * DateTime：2019/5/6 13:16
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+// * Desc：
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+//==================================
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+package gopay
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+
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+import (
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+ "bytes"
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+ "crypto/hmac"
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+ "crypto/md5"
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+ "crypto/sha256"
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+ "crypto/tls"
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+ "encoding/hex"
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+ "fmt"
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+ "github.com/parnurzeal/gorequest"
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+ "strings"
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+)
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+
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+//JSAPI支付，支付参数后，再次计算出小程序用的paySign
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+func GetMiniPaySign(appId, nonceStr, prepayId, signType, timeStamp, secretKey string) (paySign string) {
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+ buffer := new(bytes.Buffer)
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+ buffer.WriteString("appId=")
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+ buffer.WriteString(appId)
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+
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+ buffer.WriteString("&nonceStr=")
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+ buffer.WriteString(nonceStr)
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+
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+ buffer.WriteString("&package=")
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+ buffer.WriteString(prepayId)
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+
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+ buffer.WriteString("&signType=")
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+ buffer.WriteString(signType)
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+
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+ buffer.WriteString("&timeStamp=")
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+ buffer.WriteString(timeStamp)
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+
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+ buffer.WriteString("&key=")
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+ buffer.WriteString(secretKey)
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+
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+ signStr := buffer.String()
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+
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+ var hashSign []byte
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+ if signType == SignType_MD5 {
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+ hash := md5.New()
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+ hash.Write([]byte(signStr))
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+ hashSign = hash.Sum(nil)
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+ } else {
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+ hash := hmac.New(sha256.New, []byte(secretKey))
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+ hash.Write([]byte(signStr))
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+ hashSign = hash.Sum(nil)
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+ }
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+ paySign = strings.ToUpper(hex.EncodeToString(hashSign))
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+ return
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+}
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+
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+//获取微信用户的OpenId、SessionKey、UnionId
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+func GetWeChatUserId(appId, secretKey, wxCode string) (userRsp *WeChatUserIdRsp, err error) {
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+ userRsp = new(WeChatUserIdRsp)
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+
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+ url := fmt.Sprintf("https://api.weixin.qq.com/sns/jscode2session?appid=%v&secret=%v&js_code=%v&grant_type=authorization_code", appId, secretKey, wxCode)
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+
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+ agent := gorequest.New()
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+ tlsCfg := &tls.Config{
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+ InsecureSkipVerify: true,
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+ }
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+ agent.TLSClientConfig(tlsCfg)
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+ _, _, errs := agent.Get(url).EndStruct(userRsp)
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+ if len(errs) > 0 {
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+ return nil, errs[0]
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+ } else {
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+ return userRsp, nil
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+ }
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+}
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Jerry