How to consume jwt token in asp.net core web api for reading only user info without any validation

Question

I have a simple requirement to read the token in asp.net core web api for every request and read the sub part of token which has UserID. Token validation will be done by a third party rest api call which will tell if token is valid or not. No validation logic should exist in my api.

Unfortunately all the articles I have read, they are validating the token, which I don't want in my case.

Any help would be much appreciated.

Yared · Accepted Answer · 2018-05-30 15:12:38Z

1

You can use the following extension method to get userID from HttpContext. Use ClaimType which contains userID value.

public static int GetUserID(this Microsoft.AspNetCore.Http.HttpContext context){
            var claimsIdentity = context.User;
            var claim = claimsIdentity.Claims.FirstOrDefault(cl => cl.Type == ClaimTypes.YOUR_CLAIM_TYPE);            
            return Convert.ToInt32(claim.Value);
        }

Usage in your controller methods:

var userID = HttpContext.GetUserID();

answered May 30, 2018 at 15:12

Yared

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