public override string GetCacheKey(string virtualPath)
{
if (!IsAppResourcePath(virtualPath))
{
return(parent.GetCacheKey(virtualPath));
}
else
{
return(null); // base.GetCacheKey(virtualPath);
}
}
/// <summary>
/// 利用指定 VirtualPathProvider 将虚拟路径所指向文件当作静态文件加载。
/// </summary>
/// <param name="context">当前请求上下文</param>
/// <param name="provider">指定的 VirtualPathProvider</param>
/// <param name="virtualPath">虚拟路径</param>
/// <returns>加载结果</returns>
public HtmlContentResult LoadContent(HttpContextBase context, VirtualPathProvider provider, string virtualPath)
{
if (!VirtualPathUtility.IsAppRelative(virtualPath))
{
return(null);
}
if (!provider.FileExists(virtualPath))
{
return(null);
}
var file = provider.GetFile(virtualPath);
if (file == null)
{
return(null);
}
var key = provider.GetCacheKey(virtualPath) ?? "StaticFile_" + virtualPath;
var content = context.Cache.Get(key) as string;
if (content == null)
{
var now = DateTime.UtcNow;
content = LoadContent(file);
var dependency = provider.GetCacheDependency(virtualPath, new[] { virtualPath }, now) ?? new CacheDependency(HostingEnvironment.MapPath(virtualPath));
context.Cache.Insert(key, content, dependency);
}
return(new HtmlContentResult(this, content, new Uri(baseUri, VirtualPathUtility.ToAbsolute(virtualPath)), key));
}
/// <summary>
/// 利用指定 VirtualPathProvider 将虚拟路径所指向文件当作静态文件加载。
/// </summary>
/// <param name="provider">指定的 VirtualPathProvider</param>
/// <param name="virtualPath">虚拟路径</param>
/// <returns>加载结果</returns>
public HtmlContentResult LoadContent(VirtualPathProvider provider, string virtualPath)
{
if (!VirtualPathUtility.IsAppRelative(virtualPath))
{
return(null);
}
if (!provider.FileExists(virtualPath))
{
return(null);
}
var file = provider.GetFile(virtualPath);
if (file == null)
{
return(null);
}
var key = provider.GetCacheKey(virtualPath) ?? "StaticFile_" + virtualPath;
var content = HttpRuntime.Cache.Get(key) as string;
if (content == null)
{
var dependency = HtmlServices.CreateCacheDependency(provider, virtualPath);
content = LoadContent(file);
HttpRuntime.Cache.Insert(key, content, dependency);
}
return(new HtmlContentResult(content, key));
}
