/// <summary>
/// 处理微信返回的异步通知
/// </summary>
/// <param name="xml">微信发来的xml内容</param>
/// <param name="transactionId">对应的交易Id</param>
public virtual void ProcessNotify(string xml, out Guid transactionId)
{
// 解析xml判断是否错误
var logManager = Application.Ioc.Resolve <LogManager>();
var notifyData = new WxPayData();
notifyData.FromXmlWithoutCheckSign(xml);
if (notifyData.IsError)
{
transactionId = Guid.Empty;
throw new WxPayException(notifyData.ErrMsg);
}
// 获取交易和接口，检查金额是否一致
PaymentTransaction transaction;
PaymentApi api;
WechatApiHandler.ApiData apiData;
var outTradeNo = notifyData.GetValue("out_trade_no") as string; // 交易流水号
var tradeNo = notifyData.GetValue("transaction_id") as string; // 微信上的订单编号
var paidAmount = notifyData.GetValue("total_fee"); // 支付的金额
var transactionManager = Application.Ioc.Resolve <PaymentTransactionManager>();
using (UnitOfWork.Scope()) {
transaction = transactionManager.Get(t => t.Serial == outTradeNo);
if (transaction == null)
{
throw new ArgumentException(new T("Transaction with serial '{0}' not exist", outTradeNo));
}
else if (transaction.Amount != paidAmount.ConvertOrDefault <decimal>() / 100.0M)
{
throw new ArgumentException(new T(
"Transaction amount not matched, excepted '{0}' but actual is '{1}'",
transaction.Amount, paidAmount));
}
transactionId = transaction.Id;
api = transaction.Api;
apiData = transaction.Api.ExtraData
.GetOrDefault <WechatApiHandler.ApiData>("ApiData") ??
new WechatApiHandler.ApiData();
}
var config = new WxPayConfig(apiData);
// 检查签名是否合法
notifyData.CheckSign(config);
// 根据返回状态处理交易
var tradeState = notifyData.GetValue("trade_state") as string;
if (tradeState == "SUCCESS")
{
// 交易成功
transactionManager.Process(transactionId, tradeNo, PaymentTransactionState.Success);
}
else if (tradeState == "REFUND" || tradeState == "REVOKED" || tradeState == "PAYERROR")
{
// 交易中止
transactionManager.Process(transactionId, tradeNo, PaymentTransactionState.Aborted);
transactionManager.SetLastError(transaction.Id, new T("Buyer closed transaction on wechat"));
}
else if (tradeState == "NOTPAY" || string.IsNullOrEmpty(tradeState))
{
// 未支付
}
else if (tradeState == "USERPAYING" || tradeState == "PAYERROR")
{
// 支付中
transactionManager.Process(transactionId, tradeNo, PaymentTransactionState.WaitingPaying);
}
else
{
// 交易中止, 未知的状态
transactionManager.Process(transactionId, tradeNo, PaymentTransactionState.Aborted);
transactionManager.SetLastError(transactionId, new T(
"Unknown wechat trade status '{0}'", tradeState));
}
}
