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wepay.go
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wepay.go
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/*
供调用的封装程度更高的func
sam
参见测试代码
*/
package wepay
import (
"fmt"
"github.com/gkzy/gow/lib/util"
"net/http"
"strings"
"time"
)
//WxAPI 调用实体
type WxAPI struct {
Client *Client
}
//NewWxAPI init
//account基本的商户信息
//notifyURL 异步通知地址
//endMinute 订单有效期
func NewWxAPI(wxConfig *WxConfig) *WxAPI {
return &WxAPI{
Client: &Client{
WxConfig: wxConfig, //配置信息
signType: MD5, //验证方式
httpConnectTimeout: 2000, //连接时间
httpReadTimeout: 1000, //读时间
},
}
}
//UnifiedOrder 统一下单接口
func (m *WxAPI) UnifiedOrder(body string, outTradeNo string, totalFee int, openID string, clientIP string, tradeType TradeType) (Params, error) {
params := make(Params)
params.SetString("body", body)
params.SetString("out_trade_no", outTradeNo)
params.SetInt64("total_fee", int64(totalFee))
params.SetString("openid", openID)
params.SetString("trade_type", string(tradeType))
params.SetString("notify_url", m.Client.NotifyURL)
//订单的有效期,开始和结束时间
now := time.Now()
params.SetString("time_start", util.TimeFormat(now, "YYYYMMDDHHmmss"))
params.SetString("time_expire", util.TimeFormat(now.Add(time.Minute*time.Duration(m.Client.OrderTime)), "YYYYMMDDHHmmss"))
if clientIP != "" {
params.SetString("spbill_create_ip", clientIP)
} else if tradeType == TradeTypeNative {
params.SetString("spbill_create_ip", m.Client.ServerIP) //服务器IP
}
return m.Client.UnifiedOrder(params)
}
//AppTrade APP下单
func (m *WxAPI) AppTrade(body, outTradeNo string, totalFee int, clientIP string) (ret *AppPayResp, err error) {
params, err := m.UnifiedOrder(body, outTradeNo, totalFee, "", clientIP, TradeTypeApp)
if err != nil {
return
}
prepayID := strings.TrimSpace(params.GetString("prepay_id"))
if len(prepayID) == 0 {
err = fmt.Errorf("返回prepay_id失败")
return
}
//时间戳
timestamp := time.Now().Unix()
//随机值
nonceStr := makeNonceStr(20)
pg := "Sign=WXPay"
p := make(Params)
p.SetString("appid", m.Client.AppId)
p.SetString("partnerid", m.Client.MchId)
p.SetString("prepayid", prepayID)
p.SetString("package", pg)
p.SetString("noncestr", nonceStr)
p.SetString("timestamp", fmt.Sprintf("%d", timestamp))
//计算并返回签名
sign := m.Client.Sign(p)
ret = &AppPayResp{
AppID: m.Client.AppId,
PartnerID: m.Client.MchId,
PrepayID: prepayID,
Package: pg,
NonceStr: nonceStr,
Timestamp: fmt.Sprintf("%d", timestamp),
Sign: sign,
}
return
}
//NativeTrade 扫码支付下单
//使用时把返回的code_url生成二维码,供前台用户扫码支付
func (m *WxAPI) NativeTrade(body, outTradeNo string, totalFee int) (ret string, err error) {
params, err := m.UnifiedOrder(body, outTradeNo, totalFee, "", "", TradeTypeNative)
if err != nil {
return
}
ret = params.GetString("code_url")
if len(ret) == 0 {
err = fmt.Errorf("返回的code_url为空")
return
}
return
}
//H5Trade H5下单
func (m *WxAPI) H5Trade(body, outTradeNo string, totalFee int, clientIP string) (ret string, err error) {
params, err := m.UnifiedOrder(body, outTradeNo, totalFee, "", clientIP, TradeTypeH5)
if err != nil {
return
}
ret = params.GetString("mweb_url")
if len(ret) == 0 {
err = fmt.Errorf("返回的mweb_url为空")
return
}
return
}
//JSAPITrade 公众号支付
//需要传入公众号对应用户的openID
func (m *WxAPI) JSAPITrade(body, outTradeNo string, totalFee int, openID, clientIP string) (ret string, err error) {
params, err := m.UnifiedOrder(body, outTradeNo, totalFee, openID, clientIP, TradeTypeJSAPI)
if err != nil {
return
}
errCode := params.GetString("err_code")
if errCode == "PARAM_ERROR" {
err = fmt.Errorf(params.GetString("err_code_desc"))
return
}
ret = strings.TrimSpace(params.GetString("prepay_id"))
if len(ret) == 0 {
err = fmt.Errorf("返回prepay_id失败")
return
}
return
}
//Notify 异步通知
//返回异步通知状态信息
//调用方拿到返回值后,需要根据 outTradeNo tradeNo openID等值,做进一点检验,如果检验失败,设置ret.ReturnCode="FAIL";
//成功时,需要回写返回值到本地
//最后以xml方式输出 ret
func (m *WxAPI) Notify(req *http.Request) (ret *NotifyRet, outTradeNo, tradeNo, openID string, err error) {
params, err := m.Client.Notify(req)
if err != nil {
return
}
ret = new(NotifyRet)
if params["return_code"] == "SUCCESS" {
ret.ReturnCode = "SUCCESS"
ret.ReturnMsg = "OK"
}
//返回给调用方做校验证和回写使用;
outTradeNo = params.GetString("out_trade_no")
tradeNo = params.GetString("transaction_id")
openID = params.GetString("openid")
return
}
//OrderQuery 订单查询
// 返回是否成功,和错误信息
func (m *WxAPI) OrderQuery(transactionID, outTradeNo string) (state bool, tradeNo string, err error) {
if transactionID == "" && outTradeNo == "" {
err = fmt.Errorf("[transactionID]与[outTradeNo]不能同时为空")
return
}
params := make(Params)
params.SetString("transaction_id", transactionID)
params.SetString("out_trade_no", outTradeNo)
params, err = m.Client.OrderQuery(params)
if err != nil {
return
}
//向前台隐藏几个关键信息
delete(params, "appid")
delete(params, "mch_id")
delete(params, "sign")
//返回有可能存在的tradeNo
tradeNo = params.GetString("transaction_id")
if params.GetString("return_code") == "SUCCESS" && params.GetString("trade_state") == "SUCCESS" {
state = true
} else if params.GetString("trade_state") == "NOTPAY" { //未支付
err = fmt.Errorf(params.GetString("trade_state_desc"))
} else if params.GetString("trade_state") == "CLOSED" { //订单已关闭
err = fmt.Errorf(params.GetString("trade_state_desc"))
} else {
err = fmt.Errorf(params.GetString("err_code_des")) //其他错误
}
return
}