Pay_Result IWeChatPay.notifyPay()
{
if (_info == null)
{
throw new WeChatError("请先调用init初始化");
}
using (Stream stream = _context.Request.Body)
{
byte[] bytes = new byte[_context.Request.ContentLength.Value];
stream.Read(bytes, 0, bytes.Length);
stream.Dispose();
string postString = Encoding.UTF8.GetString(bytes);
if (string.IsNullOrEmpty(postString))
{
throw new Exception("没有POST数据过来");
}
//序列化
var result = XmlHelper.deserialize <Pay_Result>(postString);
if (result == null)
{
throw new Exception("支付序列化失败");
}
if (result.return_code != "SUCCESS")
{
throw new Exception($"支付未通过:{result.return_msg}");
}
if (result.result_code != "SUCCESS")
{
throw new Exception($"支付失败:{result.err_code}-{result.err_code_des}");
}
//验证
var sign = result.sign;
var sign_type = result.sign_type;
result.sign = null;
result.sign_type = null;
var str = ModelHelper.convertToUrlParameter(result) + $"&key={_info.pay_sign_key}";
if (sign_type.ToLower() == "md5")
{
result.sign = StringEncyptionHelper.md5(str).ToUpper();
}
else
{
result.sign = StringEncyptionHelper.hash_hmac256(str, _info.pay_sign_key);
}
if (sign == result.sign)
{
return(result);
}
}
throw new Exception("签名验证失败");
}
Pay_JsAPI IWeChatPay.jsPayInfo(string prepay_id)
{
if (_info == null)
{
throw new WeChatError("请先调用init初始化");
}
var payinfo = new Pay_JsAPI
{
appId = _info.pay_appid,
nonceStr = StringHelper.getRandomString(16),
timeStamp = StringHelper.convertDateTimeInt(DateTime.Now).ToString(),
package = $"prepay_id={prepay_id}",
};
//参数给完 开始签名
var str = ModelHelper.convertToUrlParameter(payinfo) + $"&key={_info.pay_sign_key}";
payinfo.paySign = StringEncyptionHelper.md5(str).ToUpper();
return(payinfo);
}
string IWeChatPay.unifiedOrder(Pay_UnifiedOrder order)
{
if (_info == null)
{
throw new WeChatError("请先调用init初始化");
}
order.appid = _info.pay_appid;
order.mch_id = _info.pay_mchid;
order.sign_type = _info.pay_sign_type;
order.notify_url = _info.pay_notifyurl;
order.nonce_str = StringHelper.getRandomString(16);
//参数给完 开始签名
var str = ModelHelper.convertToUrlParameter(order) + $"&key={_info.pay_sign_key}";
if (order.sign_type.ToLower() == "md5")
{
order.sign = StringEncyptionHelper.md5(str).ToUpper();
}
else
{
order.sign = StringEncyptionHelper.hash_hmac256(str, _info.pay_sign_key);
}
//检测必填参数
if (string.IsNullOrWhiteSpace(order.out_trade_no))
{
throw new Exception("缺少统一支付接口必填参数out_trade_no！");
}
else if (string.IsNullOrWhiteSpace(order.body))
{
throw new Exception("缺少统一支付接口必填参数body！");
}
else if (order.total_fee <= 0)
{
throw new Exception("缺少统一支付接口必填参数total_fee！");
}
else if (string.IsNullOrWhiteSpace(order.trade_type))
{
throw new Exception("缺少统一支付接口必填参数trade_type！");
}
//关联参数
if (order.trade_type == "JSAPI" && string.IsNullOrWhiteSpace(order.openid))
{
throw new Exception("统一支付接口中，缺少必填参数openid！trade_type为JSAPI时，openid为必填参数！");
}
if (order.trade_type.ToString() == "NATIVE" && string.IsNullOrWhiteSpace(order.product_id))
{
throw new Exception("统一支付接口中，缺少必填参数product_id！trade_type为JSAPI时，product_id为必填参数！");
}
//异步通知url未设置，则使用配置文件中的url
if (string.IsNullOrWhiteSpace(order.notify_url))
{
throw new Exception("统一支付接口中，notify_url");
}
//开始组装xml字符串
var xml = XmlHelper.serialize(order);
//传值
var response = HttpHelper.post(unifiedorderurl, xml);
var result = XmlHelper.deserialize <Pay_UnifiedOrderReturn>(response);
//开始判断
if (result.return_code != "SUCCESS")
{
throw new Exception(result.return_msg);
}
if (result.result_code != "SUCCESS")
{
throw new Exception($"错误代码:{result.err_code},错误描述:{result.err_code_des}");
}
//---业务返回,只有为NATIVE时才返回二维码地址,其他时间返回prepay_id
if (result.trade_type == "NATIVE")
{
return(result.code_url);
}
return(result.prepay_id);
}