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, Feb 21 '17 at 08:36

score 50 · Accepted Answer · edited May 03 '18 at 09:55

50

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

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

edited May 03 '18 at 09:55

Irvin Dominin

29,799
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answered Feb 21 '17 at 10:58

Jyotish Singh

1,763
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17

If you use C# 7, you can skip declaring the variable: actionContext HttpContext.Request.Headers.TryGetValue("Authorization", out var unittId); – AFD May 12 '17 at 10:58
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)` – conceptdeluxe Jul 30 '20 at 15:33

score 2 · Answer 2 · edited Jul 25 '19 at 12:02

2

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 '19 at 12:02

Moddasir

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answered Jul 25 '19 at 11:21

impotunator

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score 1 · Answer 3 · edited May 03 '18 at 09:56

1

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

edited May 03 '18 at 09:56

Irvin Dominin

29,799
9
75
107

answered Feb 21 '17 at 10:20

ben yip

119
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6

score 1 · Answer 4 · answered Aug 24 '18 at 05:08

1

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

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

answered Aug 24 '18 at 05:08

Foyzul Karim

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Unable to get request header in asp net core web API

4 Answers4