How do I get the current Url from within a FilterAttribute?

Question

I am writing an Authorize filter attribute adn I'm having trouble figuring out how to get the current url as a string so I can pass it as a parameter to the LogOn action. The goal is that if a user successfully logs on, they will be redirected to the page they were originally trying to access.

public override void OnAuthorization(AuthorizeContext filterContext)
{
    base.OnAuthorization(filterContext);

    ... my auth code ...
    bool isAuth ;
    ... my auth code ...

    if(!isAuth)
    {
        filterContext.Result = new RedirectToRouteResult(
            new RouteValueDictionary { 
                { "Area", "" }, 
                { "Controller", "Account" }, 
                { "Action", "LogOn" },
                { "RedirectUrl", "/Url/String/For/Currnt/Request" } // how do I get this?
            }
        );
    }
}

How do I get the full string Url from the current request?

Leniel Maccaferri · Accepted Answer · 2013-05-04 08:40:09Z

86

Try:

var url = filterContext.HttpContext.Request.Url;

edited May 4, 2013 at 8:40

Leniel Maccaferri

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answered May 25, 2012 at 21:30

rboarman

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1 Comment

Roman Gudkov Over a year ago

You could also use RawUrl (filterContext.HttpContext.Request.RawUrl) to get url without domain

VJAI · Accepted Answer · 2014-08-13 03:25:24Z

19

To get the complete URL you can try as suggested by the @rboarman but usually the RedirectUrl will be the relative url and for that you have to try the the RawUrl property of the Request object.

filterContext.HttpContext.Request.Url  ===> http://somesite.com/admin/manage

filterContext.HttpContext.Request.RawUrl ====> /admin/manage

EDITED: Fixed the second example

edited Aug 13, 2014 at 3:25

answered May 26, 2012 at 13:00

VJAI

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3 Comments

Josh Noe Over a year ago

Did you mean for "RawUrl" to be used in your 2nd example?

ta.speot.is Over a year ago

-1 Observing the value of Url does not magically make it absolute then relative.

VJAI Over a year ago

@JoshNoe Yes I meant the RawUrl in the second example. I'm little away from SO nowadays and I missed to see your comment.

Leniel Maccaferri · Accepted Answer · 2013-05-04 08:53:37Z

7

In my specific case I was after the UrlReferrer URL.

filterContext.HttpContext.Request.UrlReferrer

This one let me redirect the user back to the page he was before trying to access an action he doesn't have permission to access.

answered May 4, 2013 at 8:53

Leniel Maccaferri

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Comments

jmdon · Accepted Answer · 2018-05-04 14:38:48Z

5

This is the highest ranked result on Google so in Asp.net Core 2.0 this is how I'm doing it:

context.HttpContext.Request.Url();

using this extension method:

/// <summary>
/// Returns the absolute url.
/// </summary>
public static string Url(this HttpRequest request)
{
    return $"{request.Scheme}://{request.Host}{request.Path}{request.QueryString}";
}

answered May 4, 2018 at 14:38

jmdon

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