Unable to get Streams using batched requests, Length always zero

[greynoO]

Describe the bug

When using BatchRequestContentCollection (or BatchRequestContent) to request a stream content it only returns an empty stream (Length = 0). This happens regardless of whether there is a single or multiple requests in the collection.

var batchRequestContentCollection = new BatchRequestContentCollection(_graphClient);
var driveItemRequest = _graphClient.Drives[driveId].Items[driveItemId].Content.ToGetRequestInformation();
var requestId = await batchRequestContentCollection.AddBatchRequestStepAsync(driveItemRequest);
var batchResponse = await _graphClient.Batch.PostAsync(batchRequestContentCollection);
var stream = await batchResponse.GetResponseStreamByIdAsync(requestId);

I also tried to just use GetResponseByIdAsync, Header information says

Content-Type: application/octet-stream
Content-Length: 0

This does not occur when doing a single request without batching:

var stream = await _graphClient.Drives[driveId].Items[driveItemId].Content.GetAsync();

The stream gets returned correctly then.

Expected behavior

Batched requests should return stream content correctly.

How to reproduce

var batchRequestContentCollection = new BatchRequestContentCollection(_graphClient);
var driveItemRequest = _graphClient.Drives[driveId].Items[driveItemId].Content.ToGetRequestInformation();
var requestId = await batchRequestContentCollection.AddBatchRequestStepAsync(driveItemRequest);
var batchResponse = await _graphClient.Batch.PostAsync(batchRequestContentCollection);
var stream = await batchResponse.GetResponseStreamByIdAsync(requestId);

SDK Version

3.2.1

Latest version known to work for scenario above?

don't know

Configuration

• OS: Windows 11
• x64

[greynoO]

Info: It works when building the batched request manually with HttpClient.

var batchRequests = new List<object>();

var url = $"/drives/{item.DriveId}/items/{item.DriveItemId}/content";
var requestId = Guid.NewGuid().ToString();

batchRequests.Add(new
{
    id = requestId,
    method = "GET",
    url = url
});

var batchRequestBody = new
{
    requests = batchRequests
};

var batchResponse = await _httpClient.PostAsync(
    "$batch",
    new StringContent(
        System.Text.Json.JsonSerializer.Serialize(batchRequestBody),
        Encoding.UTF8,
        "application/json"
    )
);

So there might be something wrong with BatchRequestContent?

The /content call returns a 302 status with a Location header to the actual file.

{"responses": [{"id":"<someId>","status":302,"headers":{"Location":"<uri>","Cache-Control":"no-store, no-cache","Content-Type":"application/octet-stream"},"body":""}]}

I guess that only the empty body is evaluated?

[andrueastman]

Thanks for raising this @greynoO

It looks like due to the redirect response there is no response body returned when calling this specific API.

Are you able to obtain the location header if you change your code to fetch like this?

var responseMessage = await batchResponse.GetResponseByIdAsync(requestId);
var locationHeader = responseMessage.Headers.Location;

[greynoO]

Thanks for raising this @greynoO

It looks like due to the redirect response there is no response body returned when calling this specific API.

Are you able to obtain the location header if you change your code to fetch like this?

var responseMessage = await batchResponse.GetResponseByIdAsync(requestId);
var locationHeader = responseMessage.Headers.Location;

I get the location header, but of course it should be done automatically when calling GetResponseStreamByIdAsync?