标签:c asp-net asp-net-core asp-net-core-mvc static-files
我有虚拟目录指向IIS中的一些文件服务器.我了解到ASP.NET Core无法“看到”IIS中的虚拟目录,因为它在Kestral上运行.
我被告知解决方法是使用app.UseFileServer:
app.UseFileServer(new FileServerOptions
{
FileProvider = new PhysicalFileProvider(@"\\server\path"),
RequestPath = new PathString("/MyPath"),
EnableDirectoryBrowsing = true
});
我设置了它,当我在浏览器地址栏中键入/ MyPath时它可以工作.
但是,我希望能够在控制器中获得物理路径.
就像是:
//Server.Map path no longer exists in ASP.NET Core...
var filePath = Server.MapPath("/MyPath");
var fileName = "MyFile.txt";
System.IO.File.OpenRead(Path.Combine(filePath , fileName));
有没有办法通过在app.UseFileServer中提供RequestPath I设置来获取物理路径?
解决方法:
此问题的核心是访问控制器中正确的IFileProvider(指向目录的物理路径).
您可以通过在自定义服务中配置这些路径来实现此目的,以便您可以在任何位置访问它们:
>在Configure()方法中设置UseFileServer
>在您的控制器等
我有一些代码来演示如何解决这个问题:
服务和便利方法
首先,创建一个自定义服务,该服务将保存可由UseFileServer()或您的控制器访问的FileServerOptions.我选择了它们的列表,因此您可以添加多个路径.
public interface IFileServerProvider
{
/// <summary>
/// Contains a list of FileServer options, a combination of virtual + physical paths we can access at any time
/// </summary>
IList<FileServerOptions> FileServerOptionsCollection { get; }
/// <summary>
/// Gets the IFileProvider to access a physical location by using its virtual path
/// </summary>
IFileProvider GetProvider(string virtualPath);
}
/// <summary>
/// Implements IFileServerProvider in a very simple way, for demonstration only
/// </summary>
public class FileServerProvider : IFileServerProvider
{
public FileServerProvider(IList<FileServerOptions> fileServerOptions)
{
FileServerOptionsCollection = fileServerOptions;
}
public IList<FileServerOptions> FileServerOptionsCollection { get; }
public IFileProvider GetProvider(string virtualPath)
{
var options = FileServerOptionsCollection.FirstOrDefault(e => e.RequestPath == virtualPath);
if (options != null)
return options.FileProvider;
throw new FileNotFoundException($"virtual path {virtualPath} is not registered in the fileserver provider");
}
}
然后,为方便起见,您还可以添加一个Extension方法,该方法将使用上述服务中的选项调用UseFileServer中间件:
/// <summary>
/// Wrapper for UseFileServer to easily use the FileServerOptions registered in the IFileServerProvider
/// </summary>
public static class FileServerProviderExtensions
{
public static IApplicationBuilder UseFileServerProvider(this IApplicationBuilder application, IFileServerProvider fileServerprovider)
{
foreach (var option in fileServerprovider.FileServerOptionsCollection)
{
application.UseFileServer(option);
}
return application;
}
}
启动方法
现在,您只需要使用您选择的路径(1)注册IFileServerProvider,并将其移交给方便方法以实际使用它们(2).
(1)首先,使用您选择的路径将IFileServerProvider注册为Singleton服务:
public void ConfigureServices(IServiceCollection services)
{
//Add our IFileServerProvider implementation as a singleton
services.AddSingleton<IFileServerProvider>(new FileServerProvider(
new List<FileServerOptions>
{
new FileServerOptions
{
FileProvider = new PhysicalFileProvider(@"D:\\somepath"),
RequestPath = new PathString("/OtherPath"),
EnableDirectoryBrowsing = true
},
new FileServerOptions
{
FileProvider = new PhysicalFileProvider(@"\\server\path"),
RequestPath = new PathString("/MyPath"),
EnableDirectoryBrowsing = true
}
}));
// Add framework services.
services.AddMvc();
}
(2)然后通过调用之前创建的扩展方法实际在UseFileServer中使用它们.请注意Configure方法中的额外参数IFileServerProvider fileServerprovider:
// Note: accessing the IFileServerProvider implemantion here by adding it
// in the arguments list!
public void Configure(IApplicationBuilder app, IFileServerProvider fileServerprovider)
{
//call convenience method which adds our FileServerOptions from
// the IFileServerProvider service
app.UseFileServerProvider(fileServerprovider);
app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "{controller=Home}/{action=Index}/{id?}");
});
}
用法
现在,当您浏览到路径/ MyPath或/ OtherPath时,您应该像以前一样获得目录列表.
但是,因为我们在服务中拥有整洁的东西,所以现在可以更容易地在Controller中以编程方式访问这些路径:
public class HomeController : Controller
{
private IFileServerProvider _fileServerProvider;
public HomeController(IFileServerProvider fileServerProvider)
{
_fileServerProvider = fileServerProvider;
}
public IActionResult Index()
{
var fileProvider = _fileServerProvider.GetProvider("/MyPath");
var fileInfo = fileProvider.GetFileInfo("MyFile.txt");
using (var stream = System.IO.File.OpenRead(fileInfo.PhysicalPath))
{
string contents = new StreamReader(stream).ReadToEnd();
}
return View();
}
}
这段代码可能是用更抽象,更充分命名的版本编写的,但它演示了一个解决问题的工作方案.
标签:c,asp-net,asp-net-core,asp-net-core-mvc,static-files 来源: https://codeday.me/bug/20190627/1307768.html
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