109 lines
2.2 KiB
Go
109 lines
2.2 KiB
Go
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package weixin
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import (
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"bytes"
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"errors"
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"fmt"
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"io"
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"net/http"
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)
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var (
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ErrUserPaying = errors.New("USERPAYING")
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)
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type WxpayPartnerConfig struct {
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MchId string
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AppId string
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ApiKeyV2 string
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}
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type WxpayPartner struct {
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config *WxpayPartnerConfig
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stdClient *http.Client
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}
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type MicroPayRequest struct {
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SubMchId string
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SubAppId string
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GoodsName string
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OutTradeNo string
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TotalFee int64
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AuthCode string
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ServerIp string
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Attach string
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}
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func NewWxpayPartner(cfg *WxpayPartnerConfig) *WxpayPartner {
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return &WxpayPartner{
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config: cfg,
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stdClient: &http.Client{},
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}
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}
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func (p *WxpayPartner) MicroPay(req *MicroPayRequest) error {
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params := make(Params)
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params.Set("appid", p.config.AppId)
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params.Set("mch_id", p.config.MchId)
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params.Set("sub_mch_id", req.SubMchId)
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params.Set("nonce_str", randomStr(32))
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params.Set("body", req.GoodsName)
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params.Set("out_trade_no", req.OutTradeNo)
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params.Set("total_fee", req.TotalFee)
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params.Set("auth_code", req.AuthCode)
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if req.ServerIp == "" {
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params.Set("spbill_create_ip", "113.248.223.215")
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} else {
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params.Set("spbill_create_ip", req.ServerIp)
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}
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if req.Attach != "" {
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params.Set("attach", req.Attach)
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}
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if req.SubAppId != "" {
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params.Set("sub_appid", req.SubAppId)
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}
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params.Set("sign", params.SignMd5(p.config.ApiKeyV2))
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reqUrl := "https://api.mch.weixin.qq.com/pay/micropay"
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body, err := p.post(reqUrl, params)
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if err != nil {
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return err
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}
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result := make(Params)
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result.Decode(body)
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if result.GetString("return_code") != "SUCCESS" {
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return errors.New(string(body))
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}
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if result.GetString("result_code") != "SUCCESS" {
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if result.GetString("err_code") == "USERPAYING" {
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return ErrUserPaying
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}
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return fmt.Errorf("%s:%s",
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result.GetString("err_code"), result.GetString("err_code_des"))
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}
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return nil
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}
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// 发送请求
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func (c *WxpayPartner) post(url string, params Params) ([]byte, error) {
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var httpc *http.Client
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httpc = c.stdClient
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buf := bytes.NewBuffer(params.Encode())
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resp, err := httpc.Post(url, "application/xml; charset=utf-8", buf)
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if err != nil {
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return nil, err
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}
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, err
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}
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return body, nil
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}
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