/// <summary>
/// 分析 HTML 文档，此方法会根据情况缓存文档模型
/// </summary>
/// <param name="contentResult">文档加载结果</param>
/// <param name="parser">HTML 解析器</param>
/// <returns>HTML 文档对象</returns>
public static IHtmlDocument ParseDocument(HtmlContentResult contentResult, IHtmlParser parser)
{
var domProvider = parser.DomProvider;
if (contentResult.CacheKey != null && domProvider != null)//如果可以缓存
{
var key = contentResult.CacheKey;
var cacheKey = string.Format(CultureInfo.InvariantCulture, DocumentCacheKey, contentResult.VirtualPath);
var createDocument = Cache.Get(cacheKey) as Func <IHtmlDomProvider, IHtmlDocument>;
if (createDocument != null)
{
return(createDocument(domProvider));
}
WebServiceLocator.GetTraceService().Trace(TraceLevel.Info, "Jumony Web", "Document cache missed");
var document = ParseDocument(parser, contentResult.Content, contentResult.VirtualPath);
createDocument = document.Compile();//必须同步编译文档，否则文档对象可能被修改。
new Action(delegate
{
createDocument(domProvider);//可以异步预热，预热后再存入缓存。
Cache.Insert(cacheKey, createDocument, new CacheDependency(new string[0], new[] { key }), CacheItemPriority.High);
}
).BeginInvoke(null, null);//立即在新线程预热此方法
return(document);
}
else
{
return(ParseDocument(parser, contentResult.Content, contentResult.VirtualPath));
}
}
/// <summary>
/// 写入追踪信息
/// </summary>
/// <param name="message">消息内容</param>
/// <param name="category">消息分类</param>
/// <param name="level">消息级别</param>
protected void Trace(string message, string category = null, TraceLevel level = TraceLevel.Info)
{
WebServiceLocator.GetTraceService().Trace(level, category ?? "Jumony Web", message);
}
/// <summary>
/// 写入一条追踪信息
/// </summary>
/// <param name="message">追踪消息</param>
protected virtual void Trace(string message)
{
WebServiceLocator.GetTraceService().Trace(TraceLevel.Info, "Jumony Partial", message);
}