问在WebAPI中传递和验证查询字符串中的OWIN持有者令牌

EN

app.Use(async (context, next) =>
{
    if (context.Request.QueryString.HasValue)
    {
        if (string.IsNullOrWhiteSpace(context.Request.Headers.Get("Authorization")))
        {
            var queryString = HttpUtility.ParseQueryString(context.Request.QueryString.Value);
            string token = queryString.Get("access_token");

            if (!string.IsNullOrWhiteSpace(token))
            {
                context.Request.Headers.Add("Authorization", new[] { string.Format("Bearer {0}", token) });
            }
        }
    }

    await next.Invoke();
});

    app.UseIdentityServerBearerTokenAuthentication(new IdentityServerBearerTokenAuthenticationOptions
    {
        Authority = IdentityConfig.Authority,
        RequiredScopes = new[] { "api" },
        TokenProvider = new OAuthBearerAuthenticationProvider
        {
            OnRequestToken = ctx =>
            {
                if (String.IsNullOrWhiteSpace(ctx.Token) && ctx.Request.QueryString.HasValue)
                {
                    NameValueCollection parsedQuery = HttpUtility.ParseQueryString(ctx.Request.QueryString.Value);
                    ctx.Token = parsedQuery["access_token"];
                }

                return Task.FromResult(0);
            }
        }
    });