/// <summary>
/// 解析服务器接收到的微信服务器推送过来的消息。
/// </summary>
/// <param name="message">服务器接收到的请求消息。</param>
/// <returns>接收请求消息对象。</returns>
public static IRequestMessage Parse(string message)
{
#region 参数校验
if (string.IsNullOrEmpty(message))
{
throw new StringNullOrEmptyException(nameof(message));
}
#endregion
#region 获取消息类型
dynamic xmlMsgObj = new DynamicXml(message);
string msgTypeText = xmlMsgObj.MsgType.Value;
RequestMsgType msgType = EnumExtension.GetEnumItemByDescription <RequestMsgType>(msgTypeText);
#endregion
//如果不是 事件推送 则，
if (msgType != RequestMsgType.Event)
{
return(GetRequestMessageByMsgType(msgType, message));
}
else
{
string eventTypeText = xmlMsgObj.Event.Value;
RequestMsgEventType eventType = EnumExtension.GetEnumItemByDescription <RequestMsgEventType>(eventTypeText);
return(GetRequestEventMessageByEventType(eventType, message));
}
}
/// <summary>
/// 根据事件类型获取 <see cref="IRequestMessage"/> 。
/// </summary>
/// <param name="eventType">事件类型。</param>
/// <param name="message">XML 消息字符串。</param>
/// <returns>请求消息对象。</returns>
private static IRequestMessage GetRequestEventMessageByEventType(RequestMsgEventType eventType, string message)
{
bool isExist = WeixinApp.MessageProcessConfig.EventMessageList.Any(m => m.EventType == eventType);
//如果在配置里面不存在则不处理。
if (!isExist)
{
return(null);
}
//如果响应事件消息类型集合中不存在则将类型放到字典中缓存，
string typeName = $"Wlitsoft.Framework.WeixinSDK.Message.Request.Event.Request{eventType}EventMessage,Wlitsoft.Framework.WeixinSDK";
Type type = Type.GetType(typeName, true, true);
return((IRequestMessage)message.ToXmlObject(_requestEventMessageTypesCache.GetOrAdd(eventType, type)));
}
/// <summary>
/// 初始化请求消息事件
/// </summary>
/// <param name="msgEvent">消息事件类型</param>
/// <param name="doc">XML消息</param>
public RequestMsgEventBase(RequestMsgEventType msgEvent, XDocument doc)
: base(RequestMsgType.Event, doc)
{
Event = msgEvent;
}
/// <summary>
/// 初始化 <see cref="EventMessageConfiguration"/> 类的新实例。
/// </summary>
/// <param name="eventType">事件类型。</param>
/// <param name="weixinMessageProcessType">微信消息处理对象类型声明。</param>
public EventMessageConfiguration(RequestMsgEventType eventType, Type weixinMessageProcessType)
: base(weixinMessageProcessType)
{
this.EventType = eventType;
}
