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How to get the baseurl in ASP.NET Core? Sunday, 22 November 2020

In order to get the base URL in controller scope, you simply get via Request:
 

public class HomeController : ControllerBase

   {

       public IActionResult About()

       {

           var url =$"{this.Request.Scheme}://{this.Request.Host}{this.Request.PathBase}";

           return Ok();

       }

   }


 

But for using it everywhere, you need to create an extension for httpContext:

 

public class HttpContextExtension

   {

       private static IHttpContextAccessor httpContextAccessor;



       public static HttpContext Current => httpContextAccessor.HttpContext;



       public static string AppBaseUrl => $"{Current.Request.Scheme}://{Current.Request.Host}{Current.Request.PathBase}";



       internal static void Configure(IHttpContextAccessor contextAccessor)

       {

           httpContextAccessor = contextAccessor;

       }

   }



   public static class HttpContextExtensions

   {

       public static void AddHttpContextAccessor(this IServiceCollection services)

       {

           services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();

       }



       public static IApplicationBuilder UseHttpContext(this IApplicationBuilder app)

       {

           HttpContextExtension.Configure(app.ApplicationServices.GetRequiredService<IHttpContextAccessor>());

           return app;

       }

   }



 

And don’t forget to add the UseHttpContext() in the startup class:

 

app.UseHttpContext()




Now you can use it everywhere:
 

var appBaseUrl = HttpContextExtension.AppBaseUrl;



 

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