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close.go
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close.go
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package wepay
import (
"encoding/xml"
"github.com/googolmo/wepay/util"
)
const (
closeAPI = "/pay/closeorder"
)
// Closer 关闭订单
type Closer struct {
// 必填 ...
AppID string `xml:"appid"` // 小程序ID
MchID string `xml:"mch_id"` // 商户号
OutTradeNo string `xml:"out_trade_no"` // 商户订单号
}
type closer struct {
XMLName xml.Name `xml:"xml"`
Closer
Sign string `xml:"sign"` // 签名
NonceStr string `xml:"nonce_str"` // 随机字符串
SignType string `xml:"sign_type,omitempty"` // 签名类型: 目前支持HMAC-SHA256和MD5,默认为MD5
}
// CloseResponse 请求关闭订单时的返回
type CloseResponse struct {
AppID string `xml:"appid"`
MchID string `xml:"mch_id"`
NonceStr string `xml:"nonce_str"`
Sign string `xml:"sign"`
}
type closeResponse struct {
response
CloseResponse
}
func (c *Closer) prepare(key string) (closer, error) {
clo := closer{
Closer: *c,
SignType: "MD5",
NonceStr: util.RandomString(32),
}
signData := map[string]string{
"appid": clo.AppID,
"mch_id": clo.MchID,
"nonce_str": clo.NonceStr,
"out_trade_no": clo.OutTradeNo,
"sign_type": clo.SignType,
}
sign, err := util.SignByMD5(signData, key)
if err != nil {
return clo, err
}
clo.Sign = sign
return clo, nil
}
// Close 发起关闭支付请求
func (c Closer) Close(key string) (cres CloseResponse, err error) {
data, err := c.prepare(key)
if err != nil {
return
}
resData, err := util.PostXML(paymentBaseURL+closeAPI, data)
if err != nil {
return
}
var res closeResponse
if err = xml.Unmarshal(resData, &res); err != nil {
return
}
err = res.Check()
if err != nil {
return
}
cres = res.CloseResponse
return
}