我的Web应用程序需要让管理员用户从.net core 2 app添加和删除服务文件夹。 我找到了一种提供服务文件夹列表的方法，但是一旦配置了应用程序，我找不到动态添加或删除它们的方法。
如何从应用程序中重新运行configure函数？ 或者，如何在已运行的服务中添加或删除UseFileServer()配置？
public class Startup
{
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
app.UseDeveloperExceptionPage();
app.UseMvc();
//get these dynamically from the database
var locations = new Dictionary<string, string>{
{@"C:\folder1", "/folder1"},
{@"D:\folder2", "/folder2"}
};
foreach (var kvp in locations)
{
app.UseFileServer(new FileServerOptions()
{
FileProvider = new PhysicalFileProvider(
kvp.Key
),
RequestPath = new PathString(kvp.Value),
EnableDirectoryBrowsing = true
});
}
}
}
我正在使用.net core 2.0.0-preview2-final。
My web application needs to let an admin user add and remove served folders from a .net core 2 app. I have found a way to provide a list of served folders, but I can't find a way to dynamically add or remove them once the app has been configured.
How do I re-run the configure function from within the application? Alternatively, how do I add or remove UseFileServer() configurations within an already-running service?
public class Startup
{
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
app.UseDeveloperExceptionPage();
app.UseMvc();
//get these dynamically from the database
var locations = new Dictionary<string, string>{
{@"C:\folder1", "/folder1"},
{@"D:\folder2", "/folder2"}
};
foreach (var kvp in locations)
{
app.UseFileServer(new FileServerOptions()
{
FileProvider = new PhysicalFileProvider(
kvp.Key
),
RequestPath = new PathString(kvp.Value),
EnableDirectoryBrowsing = true
});
}
}
}
I'm using .net core 2.0.0-preview2-final.
最满意答案
您可能希望根据您的设置动态注入FileServer中间件。
微软的Chris Ross'Github上有一个示例项目： https ： //github.com/Tratcher/MiddlewareInjector/tree/master/MiddlewareInjector
您必须将上述repo中的MiddlewareInjectorOptions ， MiddlewareInjectorMiddleware和MiddlewareInjectorExtensions类添加到您的项目中。
然后，在Startup类中，将MiddlewareInjectorOptions注册为单例（因此它在整个应用程序中可用）并使用MiddlewareInjector：
public class Startup
{
public void ConfigureServices(IServiceCollection serviceCollection)
{
serviceCollection.AddSingleton<MiddlewareInjectorOptions>();
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
app.UseDeveloperExceptionPage();
var injectorOptions = app.ApplicationServices.GetService<MiddlewareInjectorOptions>();
app.UseMiddlewareInjector(injectorOptions);
app.UseWelcomePage();
}
}
然后，在任何地方注入MiddlewareInjectorOptions并动态配置中间件，如下所示：
public class FileServerConfigurator
{
private readonly MiddlewareInjectorOptions middlewareInjectorOptions;
public FileServerConfigurator(MiddlewareInjectorOptions middlewareInjectorOptions)
{
this.middlewareInjectorOptions = middlewareInjectorOptions;
}
public void SetPath(string requestPath, string physicalPath)
{
var fileProvider = new PhysicalFileProvider(physicalPath);
middlewareInjectorOptions.InjectMiddleware(app =>
{
app.UseFileServer(new FileServerOptions
{
RequestPath = requestPath,
FileProvider = fileProvider,
EnableDirectoryBrowsing = true
});
});
}
}
请注意，此MiddlewareInjector只能注入一个中间件，因此您的代码应为您要服务的每个路径调用UseFileServer() 。
我用所需的代码创建了一个Gist： https ： //gist.github.com/michaldudak/4eb6b0b26405543cff4c4f01a51ea869
You may want to dynamically inject the FileServer middleware based on your settings.
There is an example project on Microsoft's Chris Ross' Github: https://github.com/Tratcher/MiddlewareInjector/tree/master/MiddlewareInjector
You'll have to add the MiddlewareInjectorOptions, MiddlewareInjectorMiddleware and MiddlewareInjectorExtensions classes from the aforementioned repo to your project.
Then, in your Startup class, register the MiddlewareInjectorOptions as a singleton (so it's available throughout your application) and use the MiddlewareInjector:
public class Startup
{
public void ConfigureServices(IServiceCollection serviceCollection)
{
serviceCollection.AddSingleton<MiddlewareInjectorOptions>();
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
app.UseDeveloperExceptionPage();
var injectorOptions = app.ApplicationServices.GetService<MiddlewareInjectorOptions>();
app.UseMiddlewareInjector(injectorOptions);
app.UseWelcomePage();
}
}
Then, inject the MiddlewareInjectorOptions wherever you want and configure the middleware dynamically, like this:
public class FileServerConfigurator
{
private readonly MiddlewareInjectorOptions middlewareInjectorOptions;
public FileServerConfigurator(MiddlewareInjectorOptions middlewareInjectorOptions)
{
this.middlewareInjectorOptions = middlewareInjectorOptions;
}
public void SetPath(string requestPath, string physicalPath)
{
var fileProvider = new PhysicalFileProvider(physicalPath);
middlewareInjectorOptions.InjectMiddleware(app =>
{
app.UseFileServer(new FileServerOptions
{
RequestPath = requestPath,
FileProvider = fileProvider,
EnableDirectoryBrowsing = true
});
});
}
}
Note that this MiddlewareInjector can inject just a single middleware, so your code should call UseFileServer() for each path you want to serve.
I've created a Gist with the required code: https://gist.github.com/michaldudak/4eb6b0b26405543cff4c4f01a51ea869
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