ASP.NET Web Api: How to pass an access token (oAuth 2.0) using URL parameter?

Do you have any idea how I can use, an access_token generated by the default asp.net web api 2 OAuth 2 authorization mechanism, in the url parameters. Currently I am able to authorize successfully by sending a request with Authorization header like this:

Accept: application/json
Content-Type: application/json
Authorization: Bearer pADKsjwMv927u...

What I want is to enable the authorization through URL parameter like this:

https://www.domain.com/api/MyController?access_token=pADKsjwMv927u...

Answers:

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Method 1

Well – I agree that the header is a much better alternative – but there are of course situations where the query string is needed. The OAuth2 spec defines it as well.

Anyways – this feature is built into the Katana OAuth2 middleware:

http://leastprivilege.com/2013/10/31/retrieving-bearer-tokens-from-alternative-locations-in-katanaowin/

public class QueryStringOAuthBearerProvider : OAuthBearerAuthenticationProvider
{
    readonly string _name;

    public QueryStringOAuthBearerProvider(string name)
    {
        _name = name;
    }

    public override Task RequestToken(OAuthRequestTokenContext context)
    {
        var value = context.Request.Query.Get(_name);

        if (!string.IsNullOrEmpty(value))
        {
            context.Token = value;
        }

        return Task.FromResult<object>(null);
    }
}

And then:

var options = new JwtBearerAuthenticationOptions
{
    AllowedAudiences = new[] { audience },
    IssuerSecurityTokenProviders = new[]
        {
            new SymmetricKeyIssuerSecurityTokenProvider(
                issuer,
                signingKey)
        },
    Provider = new QueryStringOAuthBearerProvider(“access_token”)
};

Method 2

So, go to Global.asax and add this method:

        void Application_BeginRequest(object sender, EventArgs e)
        {
            if (ReferenceEquals(null, HttpContext.Current.Request.Headers["Authorization"]))
            {
                var token = HttpContext.Current.Request.Params["access_token"];
                if (!String.IsNullOrEmpty(token))
                {
                    HttpContext.Current.Request.Headers.Add("Authorization", "Bearer " + token);
                }
            }
        }

UPDATE:
Check out @leastprivilege answer. Much better solution.

Method 3

This is a terrible idea because the token is not protected in the query string. It is encrypted in the header with SSL.

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0