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wxpay.go
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wxpay.go
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package wxpay
import (
"encoding/xml"
"errors"
)
const (
WXPAY_UNIFIEDORDER_URL = "https://api.mch.weixin.qq.com/pay/unifiedorder" // 统一下单
WXPAY_ORDERQUERY_URL = "https://api.mch.weixin.qq.com/pay/orderquery" // 查询订单
WXPAY_CLOSEORDER_URL = "https://api.mch.weixin.qq.com/pay/closeorder" // 关闭订单
WXPAY_REFUNDQUERY_URL = "https://api.mch.weixin.qq.com/pay/refundquery" // 退款查询
// 需要证书
WXPAY_REFUND_URL = "https://api.mch.weixin.qq.com/secapi/pay/refund" // 申请退款
)
//统一下单,WxPayUnifiedOrder中out_trade_no、body、total_fee、trade_type必填
//appid、mchid、spbill_create_ip、nonce_str不需要填入
func (config *WxPayConfig) UnifiedOrder(trade_type string, params map[string]string) (resp UnifiedOrderResponse, err error) {
if params["out_trade_no"] == "" {
err = errors.New("缺少统一支付接口必填参数out_trade_no!")
return
} else if params["body"] == "" {
err = errors.New("缺少统一支付接口必填参数body!")
return
} else if params["total_fee"] == "" {
err = errors.New("缺少统一支付接口必填参数total_fee!")
return
}
if trade_type == "JSAPI" && params["openid"] == "" && params["sub_openid"] == "" {
err = errors.New("统一支付接口中,缺少必填参数openid!trade_type为JSAPI时,openid为必填参数!")
return
}
if trade_type == "NATIVE" && params["product_id"] == "" {
err = errors.New("统一支付接口中,缺少必填参数product_id!trade_type为JSAPI时,product_id为必填参数!")
return
}
// 异步通知url未设置,则使用配置文件中的url
if params["notify_url"] == "" {
params["notify_url"] = config.NotifyUrl
}
// 支付地址
if params["spbill_create_ip"] == "" {
params["spbill_create_ip"] = config.SpbillCreateIp
}
// 条件override
if params["appid"] == "" {
params["appid"] = config.AppId
}
params["mch_id"] = config.MchId
params["trade_type"] = trade_type
params["nonce_str"] = getNonceStr(32) //随机字符串
params["sign"] = makeSign(params, config.AppSecret)
xmlString := map2Xml(params)
body, err := sendXmlRequest("POST", WXPAY_UNIFIEDORDER_URL, xmlString, config.TlsConfig, config.Timeout)
if err != nil {
return
}
resp = UnifiedOrderResponse{}
err = xml.Unmarshal(body, &resp)
if err != nil {
return
} else if resp.ReturnCode != "SUCCESS" {
err = errors.New(resp.ReturnMsg)
return
}
// 校验
xmlMap, err := xml2Map(resp)
if err != nil {
return
}
sign := makeSign(xmlMap, config.AppSecret)
if resp.Sign != sign {
err = errors.New("sign err")
return
}
return
}
//查询订单,WxPayOrderQuery中out_trade_no、transaction_id至少填一个
//appid、mchid、spbill_create_ip、nonce_str不需要填入
func (config *WxPayConfig) OrderQuery(params map[string]string) (resp OrderQueryResponse, err error) {
if params["out_trade_no"] == "" && params["transaction_id"] == "" {
err = errors.New("订单查询接口中,out_trade_no、transaction_id至少填一个!")
return
}
params["appid"] = config.AppId
params["mch_id"] = config.MchId
params["nonce_str"] = getNonceStr(32) //随机字符串
params["sign"] = makeSign(params, config.AppSecret)
xmlString := map2Xml(params)
body, err := sendXmlRequest("POST", WXPAY_ORDERQUERY_URL, xmlString, config.TlsConfig, config.Timeout)
if err != nil {
return
}
resp = OrderQueryResponse{}
err = xml.Unmarshal(body, &resp)
if err != nil {
return
} else if resp.ReturnCode != "SUCCESS" {
err = errors.New(resp.ReturnMsg)
return
}
// 不校验Sign
return
}
//关闭订单,WxPayCloseOrder中out_trade_no必填
//appid、mchid、spbill_create_ip、nonce_str不需要填入
func (config *WxPayConfig) CloseOrder(params map[string]string) (resp CloseOrderResponse, err error) {
if params["out_trade_no"] == "" {
err = errors.New("订单关闭接口中,out_trade_no必填!")
return
}
params["appid"] = config.AppId
params["mch_id"] = config.MchId
params["nonce_str"] = getNonceStr(32) //随机字符串
params["sign"] = makeSign(params, config.AppSecret)
xmlString := map2Xml(params)
body, err := sendXmlRequest("POST", WXPAY_CLOSEORDER_URL, xmlString, config.TlsConfig, config.Timeout)
if err != nil {
return
}
resp = CloseOrderResponse{}
err = xml.Unmarshal(body, &resp)
if err != nil {
return
} else if resp.ReturnCode != "SUCCESS" {
err = errors.New(resp.ReturnMsg)
return
}
// 校验
xmlMap, err := xml2Map(resp)
if err != nil {
return
}
sign := makeSign(xmlMap, config.AppSecret)
if resp.Sign != sign {
err = errors.New("sign err")
return
}
return
}
//申请退款,WxPayRefund中out_trade_no、transaction_id至少填一个且
//out_refund_no、total_fee、refund_fee、op_user_id为必填参数
func (config *WxPayConfig) Refund(params map[string]string) (resp RefundResponse, err error) {
if params["out_trade_no"] == "" && params["transaction_id"] == "" {
err = errors.New("退款申请接口中,out_trade_no、transaction_id至少填一个!")
return
} else if params["out_refund_no"] == "" {
err = errors.New("退款申请接口中,缺少必填参数out_refund_no!")
return
} else if params["total_fee"] == "" {
err = errors.New("款申请接口中,缺少必填参数total_fee!")
return
} else if params["refund_fee"] == "" {
err = errors.New("退款申请接口中,缺少必填参数refund_fee!")
return
} else if params["op_user_id"] == "" {
err = errors.New("退款申请接口中,缺少必填参数op_user_id!")
return
}
params["appid"] = config.AppId
params["mch_id"] = config.MchId
params["nonce_str"] = getNonceStr(32) //随机字符串
params["sign"] = makeSign(params, config.AppSecret)
xmlString := map2Xml(params)
body, err := sendXmlRequest("POST", WXPAY_REFUND_URL, xmlString, config.TlsConfig, config.Timeout)
if err != nil {
return
}
resp = RefundResponse{}
err = xml.Unmarshal(body, &resp)
if err != nil {
return
} else if resp.ReturnCode != "SUCCESS" {
err = errors.New(resp.ReturnMsg)
return
}
// 校验
xmlMap, err := xml2Map(resp)
if err != nil {
return
}
sign := makeSign(xmlMap, config.AppSecret)
if resp.Sign != sign {
err = errors.New("sign err")
return
}
return
}
// 查询退款
// 提交退款申请后,通过调用该接口查询退款状态。退款有一定延时,
// 用零钱支付的退款20分钟内到账,银行卡支付的退款3个工作日后重新查询退款状态。
// WxPayRefundQuery中out_refund_no、out_trade_no、transaction_id、refund_id四个参数必填一个
// appid、mchid、spbill_create_ip、nonce_str不需要填入
func (config *WxPayConfig) RefundQuery(params map[string]string) (resp RefundQueryResponse, err error) {
if params["out_refund_no"] == "" &&
params["out_trade_no"] == "" &&
params["transaction_id"] == "" &&
params["refund_id"] == "" {
err = errors.New("退款查询接口中,out_refund_no、out_trade_no、transaction_id、refund_id四个参数必填一个!")
return
}
params["appid"] = config.AppId
params["mch_id"] = config.MchId
params["nonce_str"] = getNonceStr(32) //随机字符串
params["sign"] = makeSign(params, config.AppSecret)
xmlString := map2Xml(params)
body, err := sendXmlRequest("POST", WXPAY_REFUNDQUERY_URL, xmlString, config.TlsConfig, config.Timeout)
if err != nil {
return
}
resp = RefundQueryResponse{}
err = xml.Unmarshal(body, &resp)
if err != nil {
return
} else if resp.ReturnCode != "SUCCESS" {
err = errors.New(resp.ReturnMsg)
return
}
// 不校验Sign
return
}
// 支付结果通用通知
func (config *WxPayConfig) Notify(body []byte) (resp NotifyResponse, err error) {
resp = NotifyResponse{}
err = xml.Unmarshal(body, &resp)
if err != nil {
return
} else if resp.ReturnCode != "SUCCESS" {
err = errors.New(resp.ReturnMsg)
return
}
// 校验
xmlMap, err := xml2Map(resp)
if err != nil {
return
}
sign := makeSign(xmlMap, config.AppSecret)
if resp.Sign != sign {
err = errors.New("sign err")
return
}
return
}