How to get base URL in Web API controller?

Question

I know that I can use Url.Link() to get URL of a specific route, but how can I get Web API base URL in Web API controller?

mLar · Accepted Answer · 2016-04-19 13:53:42Z

97

In the action method of the request to the url "http://localhost:85458/api/ctrl/"

var baseUrl = Request.RequestUri.GetLeftPart(UriPartial.Authority) ;

this will get you http://localhost:85458

edited Apr 19, 2016 at 13:53

answered Apr 21, 2015 at 15:12

mLar

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3 Comments

Arbiter Over a year ago

This is incorrect, it only happens to work if you're running your site as the root site in IIS. If you're running your application within another application, i.e. localhost:85458/Subfolder/api/ctrl then this would yield the wrong answer (it wouldn't include "/Subfolder" which it should).

Brain2000 Over a year ago

@Arbiter Getting the base URL for a specific application is different than getting the base of a URL. So it's not that this answer is incorrect, just that there might be a different base url depending on the need

Stanley Tonkonogy Sep 25 at 13:13

Assuming the use of visual studio,

Athadu · Accepted Answer · 2015-10-29 01:36:40Z

52

Url.Content("~/")

worked for me!

answered Oct 29, 2015 at 1:36

Athadu

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3 Comments

Marek Over a year ago

I came here for this anwser :)

MiBol Over a year ago

Works on .Net Core 2.2

Stanley Tonkonogy Sep 25 at 13:19

Assuming the use of visual studio, right click on the project name, then select properties. Next, select "Web" on the left hand menu and you will see the project/base url. In more general scenarios use swagger.

Mosh Feu · Accepted Answer · 2016-03-09 11:26:07Z

45

You could use VirtualPathRoot property from HttpRequestContext (request.GetRequestContext().VirtualPathRoot)

edited Mar 9, 2016 at 11:26

Mosh Feu

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answered Nov 8, 2013 at 18:41

Kiran

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6 Comments

Nikolai Samteladze Over a year ago

Request.GetRequestContext().VirtualPathRoot returns /. I self-host Web API on localhost in Windows service using Owin. Any way to get base URL in this case? Thank you.

Nikolai Samteladze Over a year ago

Ok, this makes sense. I set http://localhost:5550/ and it correctly returns /. What I meant is how to get http://localhost:5550/ in this case...

Kiran Over a year ago

Ok, since you have access to the HttpRequestMessage(Request.RequestUri), you could grab the request uri of it and find the scheme,host and port...right?

MoonStom Over a year ago

new Uri(Request.RequestUri, RequestContext.VirtualPathRoot)

Shankar S Over a year ago

Request.GetRequestContext().VirtualPathRoot is not working on netcore 1.6.1 as HttpRequestContext doesn't exist there, is there any alternative ?

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Gokulnath · Accepted Answer · 2020-08-03 17:01:32Z

23

In .NET Core WebAPI (version 3.0 and above):

var requestUrl = $"{Request.Scheme}://{Request.Host.Value}/";

answered Aug 3, 2020 at 17:01

Gokulnath

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3 Comments

Jannick Breunis Over a year ago

From what dependency is Request from?

cheny Over a year ago

Request is a property of ApiController (and normal controller). So in code of a controller, no more dependency is needed. @JannickBreunis

Wael Galal El Deen Over a year ago

This is the best shortest answer

David Martin · Accepted Answer · 2014-01-24 09:24:54Z

16

This is what I use:

Uri baseUri = new Uri(Request.RequestUri.AbsoluteUri.Replace(Request.RequestUri.PathAndQuery, String.Empty));

Then when I combine it with another relative path, I use the following:

string resourceRelative = "~/images/myImage.jpg";
Uri resourceFullPath = new Uri(baseUri, VirtualPathUtility.ToAbsolute(resourceRelative));

answered Jan 24, 2014 at 9:24

David Martin

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Darrel Miller · Accepted Answer · 2013-11-09 00:08:42Z

10

I inject this service into my controllers.

 public class LinkFactory : ILinkFactory
 {
    private readonly HttpRequestMessage _requestMessage;
    private readonly string _virtualPathRoot;


    public LinkFactory(HttpRequestMessage requestMessage)
    {
        _requestMessage = requestMessage;
        var configuration = _requestMessage.Properties[HttpPropertyKeys.HttpConfigurationKey] as HttpConfiguration;
        _virtualPathRoot = configuration.VirtualPathRoot;
        if (!_virtualPathRoot.EndsWith("/"))
        {
            _virtualPathRoot += "/";
        }
    }

    public Uri ResolveApplicationUri(Uri relativeUri)
    {

        return new Uri(new Uri(new Uri(_requestMessage.RequestUri.GetLeftPart(UriPartial.Authority)), _virtualPathRoot), relativeUri);
    }

}

answered Nov 9, 2013 at 0:08

Darrel Miller

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2 Comments

Richard Szalay Over a year ago

And how do you inject HttpRequestMessage?

Darrel Miller Over a year ago

@RichardSzalay Autofac has it built in, github.com/autofac/Autofac/blob/master/Core/Source/… but the general idea is you setup a DI container and then use a message handler to grab the HttpRequestMessage and register it in a per-request handler.

Raffaeu · Accepted Answer · 2014-06-12 07:45:58Z

7

Use the following snippet from the Url helper class

Url.Link("DefaultApi", new { controller = "Person", id = person.Id })

The full article is available here: http://blogs.msdn.com/b/roncain/archive/2012/07/17/using-the-asp-net-web-api-urlhelper.aspx

This is the official way which does not require any helper or workaround. If you look at this approach is like ASP.NET MVC

answered Jun 12, 2014 at 7:45

Raffaeu

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1 Comment

JobaDiniz Over a year ago

when using a custom domain on Azure, the Url.Link returns the .websites domain instead of the custom domain, why is that?

MoonStom · Accepted Answer · 2015-06-25 20:41:33Z

5

new Uri(Request.RequestUri, RequestContext.VirtualPathRoot)

answered Jun 25, 2015 at 20:41

MoonStom

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Comments

Jan Zahradník · Accepted Answer · 2019-03-01 19:06:16Z

5

In ASP.NET Core ApiController the Request property is only the message. But there is still Context.Request where you can get expected info. Personally I use this extension method:

public static string GetBaseUrl(this HttpRequest request)
{
    // SSL offloading
    var scheme = request.Host.Host.Contains("localhost") ? request.Scheme : "https";
    return $"{scheme}://{request.Host}{request.PathBase}";
}

answered Mar 1, 2019 at 19:06

Jan Zahradník

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Comments

Mrchief · Accepted Answer · 2014-05-12 03:22:30Z

1

Not sure if this is a Web API 2 addition, but RequestContext has a Url property which is a UrlHelper: HttpRequestContext Properties. It has Link and Content methods. Details here

answered May 12, 2014 at 3:22

Mrchief

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Yasin Patel · Accepted Answer · 2018-04-16 09:24:46Z

1

First you get full URL using HttpContext.Current.Request.Url.ToString(); then replace your method url using Replace("user/login", "").

Full code will be

string host = HttpContext.Current.Request.Url.ToString().Replace("user/login", "")

edited Apr 16, 2018 at 9:24

Yasin Patel

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answered Apr 16, 2018 at 7:34

Shafiq Rabbi

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yu yang Jian · Accepted Answer · 2018-06-04 09:06:46Z

1

Base on Athadu's answer, I write an extenesion method, then in the Controller Class you can get root url by this.RootUrl();

public static class ControllerHelper
{
    public static string RootUrl(this ApiController controller)
    {
        return controller.Url.Content("~/");
    }
}

answered Jun 4, 2018 at 9:06

yu yang Jian

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Comments

Roman Marusyk · Accepted Answer · 2017-02-27 13:45:54Z

0

send a GET to a page and the content replied will be the answer.Base url : http://website/api/

edited Feb 27, 2017 at 13:45

Roman Marusyk

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answered Nov 29, 2015 at 1:58

zeo

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Alon S · Accepted Answer · 2019-09-15 07:56:07Z

0

Add a reference to System.Web using System.Web;
Get the host or any other component of the url you want string host = HttpContext.Current.Request.Url.Host;

answered Sep 15, 2019 at 7:56

Alon S

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1 Comment

Omzig Over a year ago

This does not work for .net core 5

Fernando Torres · Accepted Answer · 2016-02-05 14:57:27Z

-1

Al WebApi 2, just calling HttpContext.Current.Request.Path;

answered Feb 5, 2016 at 14:57

Fernando Torres

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Roman Marusyk · Accepted Answer · 2017-02-27 13:46:08Z

-1

From HttpRequestMessage

request.Headers.Host

edited Feb 27, 2017 at 13:46

Roman Marusyk

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answered Sep 18, 2015 at 9:26

Balla Győző

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