From 2b9a2e9e3e4230289a82d27bb00b23c71a859f0c Mon Sep 17 00:00:00 2001
From: Jerry <jerry@iguiyu.com>
Date: Mon, 20 May 2019 17:42:10 +0800
Subject: [PATCH] add func GetH5PaySign

---
 wechat_client_test.go |  6 +++---
 wechat_export.go      | 37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+), 3 deletions(-)

diff --git a/wechat_client_test.go b/wechat_client_test.go
index b62f5e2e..2aa38217 100644
--- a/wechat_client_test.go
+++ b/wechat_client_test.go
@@ -18,7 +18,7 @@ func TestWeChatClient_UnifiedOrder(t *testing.T) {
 	//    mchID：商户ID
 	//    secretKey：Key值
 	//    isProd：是否是正式环境
-	client := NewWeChatClient(appID, mchID, secretKey, true)
+	client := NewWeChatClient(appID, mchID, secretKey, false)
 
 	//初始化参数Map
 	body := make(BodyMap)
@@ -27,7 +27,7 @@ func TestWeChatClient_UnifiedOrder(t *testing.T) {
 	number := GetRandomString(32)
 	log.Println("Number:", number)
 	body.Set("out_trade_no", number)
-	body.Set("total_fee", 1)
+	body.Set("total_fee", 10)
 	body.Set("spbill_create_ip", "124.77.173.62")
 	body.Set("notify_url", "http://www.igoogle.ink")
 	body.Set("trade_type", TradeType_JsApi)
@@ -46,7 +46,7 @@ func TestWeChatClient_UnifiedOrder(t *testing.T) {
 	pac := "prepay_id=" + wxRsp.PrepayId
 	paySign := GetMiniPaySign(appID, wxRsp.NonceStr, pac, SignType_MD5, timeStamp, secretKey)
 	fmt.Println("paySign:", paySign)
-	//fmt.Println("Response:", wxRsp)
+	fmt.Println("Response:", wxRsp)
 }
 
 func TestWeChatClient_QueryOrder(t *testing.T) {
diff --git a/wechat_export.go b/wechat_export.go
index a986ae96..abe2a084 100644
--- a/wechat_export.go
+++ b/wechat_export.go
@@ -54,6 +54,43 @@ func GetMiniPaySign(appId, nonceStr, prepayId, signType, timeStamp, secretKey st
 	return
 }
 
+//JSAPI支付，支付参数后，再次计算出微信内H5支付需要用的paySign
+func GetH5PaySign(appId, nonceStr, prepayId, signType, timeStamp, secretKey string) (paySign string) {
+	buffer := new(bytes.Buffer)
+	buffer.WriteString("appId=")
+	buffer.WriteString(appId)
+
+	buffer.WriteString("&nonceStr=")
+	buffer.WriteString(nonceStr)
+
+	buffer.WriteString("&package=")
+	buffer.WriteString(prepayId)
+
+	buffer.WriteString("&signType=")
+	buffer.WriteString(signType)
+
+	buffer.WriteString("&timeStamp=")
+	buffer.WriteString(timeStamp)
+
+	buffer.WriteString("&key=")
+	buffer.WriteString(secretKey)
+
+	signStr := buffer.String()
+
+	var hashSign []byte
+	if signType == SignType_MD5 {
+		hash := md5.New()
+		hash.Write([]byte(signStr))
+		hashSign = hash.Sum(nil)
+	} else {
+		hash := hmac.New(sha256.New, []byte(secretKey))
+		hash.Write([]byte(signStr))
+		hashSign = hash.Sum(nil)
+	}
+	paySign = strings.ToUpper(hex.EncodeToString(hashSign))
+	return
+}
+
 //获取微信用户的OpenId、SessionKey、UnionId
 func GetWeChatUserId(appId, secretKey, wxCode string) (userRsp *WeChatUserIdRsp, err error) {
 	userRsp = new(WeChatUserIdRsp)