ASP.NET捆绑/缩小和嵌入式资源

Question

我正在尝试使用此博客中描述的技术将嵌入式DLL资源添加到我的捆绑包中.

我在VirtualPathProvider下面创建了自定义.

public class EmbeddedVirtualPathProvider : VirtualPathProvider {

    private Type _rootType;

    public EmbeddedVirtualPathProvider(Type rootType) {
        _rootType = rootType;
    }

    public override bool FileExists(string virtualPath) {
        if (IsEmbeddedPath(virtualPath))
            return true;
        else
            return Previous.FileExists(virtualPath);
    }

    public override CacheDependency GetCacheDependency(string virtualPath, IEnumerable virtualPathDependencies, DateTime utcStart) {
        if (IsEmbeddedPath(virtualPath)) {
            return null;
        }
        else {
            return Previous.GetCacheDependency(virtualPath, virtualPathDependencies, utcStart);
        }
    }

    public override VirtualDirectory GetDirectory(string virtualDir) {
        return Previous.GetDirectory(virtualDir);
    }

    public override bool DirectoryExists(string virtualDir) {
        return Previous.DirectoryExists(virtualDir);
    }

    public override VirtualFile GetFile(string virtualPath) {
        if (IsEmbeddedPath(virtualPath)) {
            string fileNameWithExtension = virtualPath.Substring(virtualPath.LastIndexOf("/") + 1);

            string nameSpace = _rootType.Namespace;
            string manifestResourceName = String.Format("{0}.{1}", nameSpace, fileNameWithExtension);
            var stream = _rootType.Assembly.GetManifestResourceStream(manifestResourceName);
            return new EmbeddedVirtualFile(virtualPath, stream);
        }
        else
            return Previous.GetFile(virtualPath);
    }

    private bool IsEmbeddedPath(string path) {
        return path.Contains("~/Embedded");
    }
}

public class EmbeddedVirtualFile : VirtualFile {
    private Stream _stream;
    public EmbeddedVirtualFile(string virtualPath, Stream stream)
        : base(virtualPath) {
        _stream = stream;
    }

    public override Stream Open() {
        return _stream;
    }
} 

然后我注册并设置捆绑包;

public static void RegisterBundles(BundleCollection bundles) {

    HostingEnvironment.RegisterVirtualPathProvider(new EmbeddedVirtualPathProvider(typeof(My.Custom.Type)));

    bundles.Add(new StyleBundle("~/Embedded/css").Include(
        "~/Embedded/files/styles/etc/styles.css")
    );
}

我还实现了EmbeddedResourceHttpHandler文章中描述的自定义,该文章在将文件作为直接http请求请求时有效.

问题: 嵌入的文件未包含在捆绑包中,它们只是被忽略.调试时,多次调用该FileExists 方法但从不调用 ~/Embedded/files/styles/etc/styles.css

我错过了什么？

次要问题

使用最新版本的Microsoft ASP.NET Web Optimization Framework时.该VirtualPathProvider作品如预期,但它可以防止IRouteHandler从执行.如果将FileExists方法更改为返回false,则允许RouteHandler执行但显然会中断VirtualPathProvider.

我假设它没有使用已配置的路由,因为它在FileExists返回true 时正在查找物理文件？这是配置还是实施问题？

Answer 1

您需要告诉BundleTable使用您的VirtualPathProvider,如下所示:

BundleTable.VirtualPathProvider = new EmbeddedVirtualPathProvider(typeof(My.Custom.Type));

此功能已添加到Microsoft ASP.NET Web Optimization Framework的v1.1.0中.

此外,您需要通过将此文件添加到web.config来确保CSS文件的请求通过ASP.NET管道.

  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true">

次要问题可以通过设置RouteCollection.RouteExistingFiles为true