DNTCommon.Web.Core

DNTCommon.Web.Core provides common scenarios' solutions for ASP.NET Core applications.

Install via NuGet

To install DNTCommon.Web.Core, run the following command in the Package Manager Console:

PM> Install-Package DNTCommon.Web.Core

You can also view the package page on NuGet.

Linux (and containers) support

The SkiaSharp library needs extra dependencies to work on Linux and containers. Please install the following NuGet packages:

PM> Install-Package SkiaSharp.NativeAssets.Linux.NoDependencies
PM> Install-Package HarfBuzzSharp.NativeAssets.Linux

You also need to modify your .csproj file to include some MSBuild directives that ensure the required files are in a good place. These extra steps are normally not required but seems to be some issues on how .NET loads them.

<Target Name="CopyFilesAfterPublish" AfterTargets="AfterPublish">
    <Copy SourceFiles="$(TargetDir)runtimes/linux-x64/native/libSkiaSharp.so" DestinationFolder="$([System.IO.Path]::GetFullPath('$(PublishDir)'))/bin/" />
    <Copy SourceFiles="$(TargetDir)runtimes/linux-x64/native/libHarfBuzzSharp.so" DestinationFolder="$([System.IO.Path]::GetFullPath('$(PublishDir)'))/bin/" />    
</Target>

Usage

After installing the DNTCommon.Web.Core package, to register its default providers, call services.AddDNTCommonWeb(); method in your Startup class.

using DNTCommon.Web.Core;

namespace MyWebApp
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddDNTCommonWeb();
        }

Features

• ActionResults

  • FeedResult is an ASP.NET Core RSS feed renderer.
  • OpenSearchResult is an ASP.NET Core OpenSearch description format provider.
  • SitemapResult is an ASP.NET Core Sitemap renderer.

• Caching

  • ICacheService encapsulates IMemoryCache functionalities.
  • [NoBrowserCache] action filter sets no-cache, must-revalidate, no-store headers for the current Response.

• DependencyInjection

  • IServiceProviderExtensions creates an IServiceScope which contains an IServiceProvider used to resolve dependencies from a newly created scope and then runs an associated callback.

• Drawing

  • TextToImageExtensions and TextToImageResult draw a text on a bitmap and then return it as a png byte array.

• Http

  • ICommonHttpClientFactory service, reuses a single HttpClient instance across a multi-threaded application.
  • DomainHelperExtensions provides useful extension methods to extract domain info of the URL's.
  • IDownloaderService encapsulates HttpClient's best practices of downloading large files.
  • IHtmlHelperService provides helper methods to work with HTML contents such as extracting links and titles or changing relative Urls to absolute Urls.
  • IHttpRequestInfoService provides useful methods to work with current HttpContext.Request.
  • IRedirectUrlFinderService finds the actual hidden URL after multiple redirects.
  • IUrlNormalizationService transforms a URL into a normalized URL so it is possible to determine if two syntactically different URLs may be equivalent.
  • IHtmlReaderService reads the HTML document's nodes recursively.

• Mail

  • IWebMailService simplifies sending an email using the MailKit library. It's able to use razor based email templates.

• ModelBinders

  • PersianDateModelBinderProvider parses an incoming Persian date and then binds it to a DateTime property automatically. To use it globally (assuming your app only sends Persian dates to the server), Add it to MvcOptions: services.AddMvc(options => options.UsePersianDateModelBinder()) or just apply it to an specific view-model [ModelBinder(BinderType = typeof(PersianDateModelBinder))].
  • YeKeModelBinderProvider parses an incoming text and then corrects its Ye & Ke characters automatically. To use it globally, Add it to MvcOptions: services.AddMvc(options => options.UseYeKeModelBinder()) or just apply it to an specific view-model [ModelBinder(BinderType = typeof(YeKeModelBinder))].
  • ApplyCorrectYeKeFilterAttribute parses an incoming text and then corrects its Ye & Ke characters automatically. To use it globally, Add it to MvcOptions: services.AddControllersWithViews(options => options.Filters.Add(typeof(ApplyCorrectYeKeFilterAttribute))).

• Mvc

  • ControllerExtensions provides useful extension methods to work with MVC Controllers.
  • IMvcActionsDiscoveryService provides a way to list all of the controllers and action methods of an MVC application.
  • IViewRendererService helps rendering a .cshtml file as an string. It's useful for creating razor based email templates.
  • UploadFileService saves the posted IFormFile to the specified directory asynchronously.

• Schedulers

  • BackgroundQueueController A .NET Core replacement for the old HostingEnvironment.QueueBackgroundWorkItem method.
  • ScheduledTasksController DNTScheduler.Core is a lightweight ASP.NET Core's background tasks runner and scheduler. To define a new task, create a new class that implements the IScheduledTask interface. To register this new task, call services.AddDNTScheduler(); method in your Startup class. AddDNTScheduler method, adds this new task to the list of the defined tasks. Also its first parameter defines the custom logic of the running intervals of this task. It's a callback method that will be called every second and provides the utcNow value. If it returns true, the job will be executed.If you have multiple jobs at the same time, the order parameter's value indicates the order of their execution.

• Security

  • [AjaxOnly] action filter determines whether the HttpRequest's X-Requested-With header has XMLHttpRequest value.
  • IProtectionProviderService is an encryption provider based on Microsoft.AspNetCore.DataProtection.IDataProtector. It's only useful for short-term encryption scenarios such as creating encrypted HTTP cookies.
  • IFileNameSanitizerService determines whether the requested file is safe to download to avoid Directory Traversal & File Inclusion attacks.
  • UploadFileExtensions attribute determines only selected file extensions are safe to be uploaded.
  • AllowUploadSafeFiles attribute disallows uploading dangerous files such as .aspx, web.config and .asp files.
  • AntiDosMiddleware is a rate limiter and throttling middleware for ASP.NET Core apps. To use it first add app.UseAntiDos() and services.Configure<AntiDosConfig> to Startup.cs file. Then complete the AntiDosConfig section of the appsettings.json file.
  • IAntiXssService provides a cleaning service for unsafe HTML fragments that can lead to XSS attacks based on a whitelist of allowed tags and attributes. To use it add services.Configure<AntiXssConfig> to Startup.cs file. Then complete the AntiXssConfig section of the appsettings.json file.