public virtual async Task <ActionResult> GetJsSdkConfigParameters([FromQuery] string jsUrl)
{
if (string.IsNullOrEmpty(jsUrl))
{
throw new UserFriendlyException("需要计算的 JS URL 参数不能够为空。");
}
var nonceStr = RandomStringHelper.GetRandomString();
var timeStamp = DateTimeHelper.GetNowTimeStamp();
var ticket = await _jsTicketAccessor.GetTicketAsync();
var @params = new WeChatParameters();
@params.AddParameter("noncestr", nonceStr);
@params.AddParameter("jsapi_ticket", await _jsTicketAccessor.GetTicketAsync());
@params.AddParameter("url", HttpUtility.UrlDecode(jsUrl));
@params.AddParameter("timestamp", timeStamp);
var signStr = _signatureGenerator.Generate(@params, SHA1.Create()).ToLower();
return(new JsonResult(new
{
appid = _optionsResolver.Resolve().AppId,
noncestr = nonceStr,
timestamp = timeStamp,
signature = signStr,
jsapi_ticket = ticket
}));
}
public virtual async Task <ActionResult> GetJsSdkWeChatPayParameters([FromQuery] string appId, string prepayId)
{
if (string.IsNullOrEmpty(prepayId))
{
throw new UserFriendlyException("请传入有效的预支付订单 Id。");
}
var nonceStr = RandomStringHelper.GetRandomString();
var timeStamp = DateTimeHelper.GetNowTimeStamp();
var package = $"prepay_id={prepayId}";
var signType = "MD5";
var option = await _optionsResolver.ResolveAsync();
var @params = new WeChatParameters();
@params.AddParameter("appId", appId);
@params.AddParameter("nonceStr", nonceStr);
@params.AddParameter("timeStamp", timeStamp);
@params.AddParameter("package", package);
@params.AddParameter("signType", signType);
var paySignStr = _signatureGenerator.Generate(@params, MD5.Create(), option.ApiKey);
return(new JsonResult(new
{
nonceStr,
timeStamp,
package,
signType,
paySign = paySignStr
}));
}
public async Task HandleAsync(WeChatPayHandlerContext context)
{
var parameters = new WeChatParameters();
var nodes = context.WeChatRequestXmlData.SelectSingleNode("/xml")?.ChildNodes;
if (nodes == null)
{
return;
}
foreach (XmlNode node in nodes)
{
if (node.Name == "sign")
{
continue;
}
parameters.AddParameter(node.Name, node.InnerText);
}
var options = await WeChatPayOptionsResolver.ResolveAsync();
var responseSign = SignatureGenerator.Generate(parameters, MD5.Create(), options.ApiKey);
if (responseSign != context.WeChatRequestXmlData.SelectSingleNode("/xml/sign")?.InnerText)
{
context.IsSuccess = false;
context.FailedResponse = "订单签名验证没有通过";
Logger.LogWarning("订单签名验证没有通过。");
}
}
public string Generate(WeChatParameters parameters, HashAlgorithm hashAlgorithm, string apiKey = null)
{
var signStr = $"{parameters.GetWaitForSignatureStr()}{(apiKey != null ? $"&key={apiKey}" : "")}";
var signBytes = hashAlgorithm.ComputeHash(Encoding.UTF8.GetBytes(signStr));
var sb = new StringBuilder();
foreach (var @byte in signBytes)
{
sb.Append($"{@byte:x2}");
}
return(sb.ToString().ToUpper());
}
