Basic OData V4 Request Authorization

Question

Our OData Endpoint is Standalone (OWIN). For one request: creating, updating, fixing and deleting everything works fine, but the problem is that I am sending a batch request with several actions in it, I have a problem with basic authorization. I read many articles, but still can not solve the problem. The OData documentation says:

Each body of the MIME part that represents one request MUST NOT include:

• authentication or authorization related HTTP headers

http://docs.oasis-open.org/odata/odata/v4.0/errata03/os/complete/part1-protocol/odata-v4.0-errata03-os-part1-protocol-complete.html#_Toc453752314

So, if I install authorization for a batch request, but do not install for each individual request in batch mode, I get null in actionContext.Request.Headers.Authorization in the OnAuthorization method. My question is: how can I get the packet request authorization header from the request in this batch?

At the endpoint, the Package is included:

HttpConfiguration config = new HttpConfiguration();
var odataBatchHandler = new DefaultODataBatchHandler(new HttpServer(config));
config.MapODataServiceRoute("ODataApi", null, builder.GetEdmModel(), odataBatchHandler);
config.Count().Filter().OrderBy().Expand().MaxTop(null).Select();
appBuilder.UseWebApi(config);

Here is the authorization logic:

public class ODataBasicAuthorizeAttribute : AuthorizeAttribute
{
    public override void OnAuthorization(System.Web.Http.Controllers.HttpActionContext actionContext)
    {
         //Question: here Authorization property is null, because this is Get request for SAStudent
                if (actionContext.Request.Headers.Authorization == null || actionContext.Request.Headers.Authorization.Scheme != "Basic")
                {
                    HandleUnauthorizedRequest(actionContext);
                }
                else
                {
                    ISession session = Login(actionContext.Request);
                    if (session == null)
                    {
                        HandleUnauthorizedRequest(actionContext);
                    }
                    else
                    {
                        IsAuthorized(actionContext);
                    }
                }
    }
}

Here is the test:

    [TestMethod]
        public void BatchRequestTest()
        {
            var odataAddress = "https://localhost:23170/Sample/Sample/OData/";
            var batchUrl = $"{odataAddress}$batch";
            HttpClient http = new HttpClient();
            // Global batch request
            HttpRequestMessage batchRequest = new HttpRequestMessage(HttpMethod.Post, batchUrl);
            batchRequest.Headers.Authorization = new AuthenticationHeaderValue("Basic", "QWRtaW5pc3RyYXRvcjpwdw==");
            MultipartContent batchContent = new MultipartContent("mixed", "batch_" + Guid.NewGuid().ToString());

            var getStudent = new HttpRequestMessage(HttpMethod.Get, $"{odataAddress}SAStudent");
            //getStudent.Headers.Authorization = new AuthenticationHeaderValue("Basic", "QWRtaW5pc3RyYXRvcjpwdw==");
            // First message content with GET request
            HttpMessageContent getRequestContent_1 = new HttpMessageContent(getStudent);
            getRequestContent_1.Headers.Remove("Content-Type");
            getRequestContent_1.Headers.Add("Content-Type", "application/http");
            getRequestContent_1.Headers.Add("Content-Transfer-Encoding", "binary");
            // Add this GET content to the batch content
            batchContent.Add(getRequestContent_1);

            var getPassport = new HttpRequestMessage(HttpMethod.Get, $"{odataAddress}SAPassport");
            //getPassport.Headers.Authorization = new AuthenticationHeaderValue("Basic", "QWRtaW5pc3RyYXRvcjpwdw==");
            // Second message content with GET request
            HttpMessageContent getRequestContent_2 = new HttpMessageContent(getPassport);
            getRequestContent_2.Headers.Remove("Content-Type");
            getRequestContent_2.Headers.Add("Content-Type", "application/http");
            getRequestContent_2.Headers.Add("Content-Transfer-Encoding", "binary");
            // Add this GET content to the batch content
            batchContent.Add(getRequestContent_2);

            // Here we go
            batchRequest.Content = batchContent;
            HttpResponseMessage response = http.SendAsync(batchRequest).Result;
            var responseString = response.Content.ReadAsStringAsync().Result;

}

If I set authorization for each individual request in a batch request, than it will work, but this seems to be wrong, so only the authorization header for Batch should be used.

Any ideas?

Thanks in advance,