/// <summary>
/// 核心执行方法 过程中的 委托方代码执行
/// </summary>
/// <param name="recMsgXml">传入消息的xml</param>
/// <returns></returns>
protected virtual Resp <WXChatContext> Execute(string recMsgXml)
{
var recMsgDirs = WXChatHelper.ChangXmlToDir(recMsgXml, out XmlDocument xmlDoc);
recMsgDirs.TryGetValue("MsgType", out var msgType);// recMsgDirs["MsgType"].ToLower();
string eventName = null;
if (msgType == "event")
{
if (!recMsgDirs.TryGetValue("Event", out eventName))
{
return(new Resp <WXChatContext>().WithResp(RespTypes.ParaError, "事件消息数据中未发现 事件类型（Event）字段！"));
}
}
var processor = GetBasicMsgProcessor(msgType, eventName);
if (!(processor?.CanExecute).HasValue)
{
processor = GetCustomProcessor(msgType, eventName, recMsgDirs);
if (!(processor?.CanExecute).HasValue)
{
processor = GetRegProcessor(msgType, eventName);
}
}
var context = processor != null && processor.CanExecute
? ExecuteProcessor(xmlDoc, recMsgDirs, processor.CreateNewInstance(), processor.Execute)
: ExecuteProcessor(xmlDoc, recMsgDirs, new WXBaseRecMsg(), null);
ExecuteEnd(context);
return(new Resp <WXChatContext>(context));
}
/// <summary>
/// 核心执行 过程的 验签和解密
/// </summary>
/// <param name="recXml">消息内容</param>
/// <param name="signature">微信加密签名</param>
/// <param name="timestamp">时间戳</param>
/// <param name="nonce">随机数</param>
/// <returns>验证结果及相应的消息内容体 （如果加密模式，返回的是解密后的明文）</returns>
private Resp <string> PrepareExecute(string recXml, string signature,
string timestamp, string nonce)
{
if (string.IsNullOrEmpty(recXml))
{
return(new Resp <string>().WithResp(RespTypes.ObjectNull, "接收的消息体为空！"));
}
var resCheck = WXChatHelper.CheckSignature(ApiConfig.Token, signature, timestamp, nonce);
if (!resCheck.IsSuccess())
{
return(new Resp <string>().WithResp(resCheck));// resCheck.ConvertToResult<string>();
}
if (ApiConfig.SecurityType == WXSecurityType.None)
{
return(new Resp <string>(recXml));
}
var dirs = WXChatHelper.ChangXmlToDir(recXml, out XmlDocument xmlDoc);
if (dirs == null || !dirs.TryGetValue("Encrypt", out var encryStr) ||
string.IsNullOrEmpty(encryStr))
{
return(new Resp <string>().WithResp(RespTypes.ObjectNull, "加密消息为空"));
}
var recMsgXml = Cryptography.WXAesDecrypt(encryStr, ApiConfig.EncodingAesKey);
return(new Resp <string>(recMsgXml));
}
/// <summary>
/// 核心执行方法
/// </summary>
/// <param name="recMsgXml">传入消息的xml</param>
/// <returns></returns>
protected virtual async Task <Resp <WXChatContext> > Processing(string recMsgXml)
{
var recMsgDirs = WXChatHelper.ChangXmlToDir(recMsgXml, out var xmlDoc);
recMsgDirs.TryGetValue("MsgType", out var msgType);
string eventName = null;
if (msgType == "event")
{
if (!recMsgDirs.TryGetValue("Event", out eventName))
{
return(new Resp <WXChatContext>().WithResp(RespTypes.ParaError, "事件消息数据中未发现 事件类型（Event）字段！"));
}
}
var processor = GetInternalMsgProcessor(msgType, eventName)
?? GetCustomProcessor(msgType, eventName, recMsgDirs);
var context = await(processor != null
? ExecuteProcessor(xmlDoc, recMsgDirs, processor)
: ExecuteProcessor(xmlDoc, recMsgDirs, SingleInstance <InternalWXChatProcessor> .Instance));
await ExecuteEnd(context);
return(new Resp <WXChatContext>(context));
}