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payment.go
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package alipay
import (
"strconv"
"fmt"
)
type Payment struct{
InputCharset string `json:"_input_charset"` //网站编码
Service string `json:"service"` //接口名称
PaymentType uint8 `json:"payment_type"` //支付类型 1：商品购买
SellerID string `json:"partner"` //合作者身份ID
SellerEmail string `json:"seller_email"` //卖家支付宝邮箱
OutTradeNo string `json:"out_trade_no"` //订单唯一id
Subject string `json:"subject"` //商品名称
Description string `json:"body"` //订单描述
TotalFee float64 `json:"total_fee"` //总价
ReturnURL string `json:"return_url"` //同步通知页面
NotifyURL string `json:"notify_url"` //异步通知页面
Signature string `json:"sign"` //签名，生成签名时忽略
SignatureType string `json:"sign_type"` //签名类型，生成签名时忽略
}
func NewDirectPayment(order string, subject string, description string, fee float64) *Payment {
payment := &Payment{
InputCharset: "utf-8",
Service: "create_direct_pay_by_user",
PaymentType: 1,
SellerID: SellerID,
SellerEmail: SellerEmail,
OutTradeNo: order,
Subject: subject,
Description: description,
TotalFee: fee,
ReturnURL: ReturnURL,
NotifyURL: NotifyURL,
}
payment.Signature = MD5Signature(payment)
payment.SignatureType = "MD5"
return payment
}
/* 按照支付宝规则生成sign */
func MD5Signature(payment *Payment) string {
p := kvpairs {
kvpair{`_input_charset`, payment.InputCharset},
kvpair{`out_trade_no`, payment.OutTradeNo},
kvpair{`partner`, payment.SellerID},
kvpair{`payment_type`, fmt.Sprintf("%d",payment.PaymentType)},
kvpair{`notify_url`, payment.NotifyURL},
kvpair{`return_url`, payment.ReturnURL},
kvpair{`subject`, payment.Subject},
kvpair{`total_fee`, fmt.Sprintf("%.2f", payment.TotalFee)},
kvpair{`body`, payment.Description},
kvpair{`service`, payment.Service},
kvpair{`seller_email`, payment.SellerEmail},
}
p = p.RemoveEmpty()
p.Sort()
sign := md5Sign(p.Join(), SellerKey)
return sign
}
func PaymentPage(payment *Payment, returnURL string, notifyURL string) string {
if returnURL != "" {
payment.ReturnURL = returnURL
}
if notifyURL != "" {
payment.NotifyURL = notifyURL
}
return `
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<form id="alipaysubmit" name="alipaysubmit" action="` + AlipayGateway + `?_input_charset=utf-8" method="get" style='display:none;'>
<input type="hidden" name="_input_charset" value="` + payment.InputCharset + `">
<input type="hidden" name="body" value="` + payment.Description + `">
<input type="hidden" name="notify_url" value="` + payment.NotifyURL + `">
<input type="hidden" name="out_trade_no" value="` + payment.OutTradeNo + `">
<input type="hidden" name="partner" value="` + payment.SellerID + `">
<input type="hidden" name="payment_type" value="` + strconv.Itoa(int(payment.PaymentType)) + `">
<input type="hidden" name="return_url" value="` + payment.ReturnURL + `">
<input type="hidden" name="seller_email" value="` + payment.SellerEmail + `">
<input type="hidden" name="service" value="` + payment.Service + `">
<input type="hidden" name="subject" value="` + payment.Subject + `">
<input type="hidden" name="total_fee" value="` + fmt.Sprintf("%.2f", payment.TotalFee) + `">
<input type="hidden" name="sign" value="` + payment.Signature + `">
<input type="hidden" name="sign_type" value="` + payment.SignatureType + `">
</form>
<script>
document.forms['alipaysubmit'].submit();
</script>
</body>
</html>
`
}