Unable to get request header in asp net core web API

Question

I am trying to create a custom filter in asp net core web api which is as below but unable to get header info.

internal class BasicAuthFilterAttribute : ActionFilterAttribute
{
  private StringValues xyz;

  public override void OnActionExecuting(ActionExecutingContext actionContext)
  {
    var authHeader = actionContext.HttpContext.Request.Headers.TryGetValue("Basic", out xyz);           
  }
}

TryGetValue always return false however I can see Headers contains the "Basic" header. As I am new in ASP.NET Core so can anyone guide me what I am possibly doing wrong?

Here how headers looks like.

@AleksejVasinov Thanks, You are right key should be "Authorization" not "Basic". — Jyotish Singh
– Jyotish Singh, Commented Feb 21, 2017 at 8:36

Irvin Dominin · Accepted Answer · 2018-05-03 09:55:52Z

64

Thank you all for your valuable input however below code worked as expected.

actionContext.HttpContext.Request.Headers.TryGetValue("Authorization", out authorizationToken);

edited May 3, 2018 at 9:55

Irvin Dominin

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answered Feb 21, 2017 at 10:58

Jyotish Singh

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2 Comments

Andrei Drynov Over a year ago

If you use C# 7, you can skip declaring the variable: actionContext HttpContext.Request.Headers.TryGetValue("Authorization", out var unittId);

conceptdeluxe Over a year ago

If checking for empty values consider that a StringValues object is returned, and, though it has implicit type conversion, it is required to use e.g. if (authorization == StringValues.Empty)

Moddasir · Accepted Answer · 2019-07-25 12:02:59Z

4

public static class HttpRequestExtension
{
    public static string GetHeader(this HttpRequest request, string key)
    {
        return request.Headers.FirstOrDefault(x => x.Key == key).Value.FirstOrDefault();
    }
}

calling method:

 var Authorization = Request.GetHeader("Authorization");

edited Jul 25, 2019 at 12:02

Moddasir

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answered Jul 25, 2019 at 11:21

impotunator

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1 Comment

Misi Over a year ago

Be careful, when using First or Single linq methods to check to if the header key if it's case-sensitive. TryGetValue is not case-sensitive when checking the key.

Foyzul Karim · Accepted Answer · 2018-08-24 05:08:12Z

2

How about this one? We shoule embrace the new variables. :)

bool tryGetValue = actionContext.ActionArguments.TryGetValue("data", out data);

answered Aug 24, 2018 at 5:08

Foyzul Karim

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Comments

Irvin Dominin · Accepted Answer · 2018-05-03 09:56:00Z

0

var xyz = context.HttpContext.Request?.Headers["Basic"];

edited May 3, 2018 at 9:56

Irvin Dominin

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answered Feb 21, 2017 at 10:20

ben yip

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1 Comment

StarLord Over a year ago

This is not correct. Header should be Authorization.

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