The issue from System.Text.Json in 5.0.0

[leolcao]

Hi minio team, I found one special issue from Minio nuget package 5.0.0.

The exception log message is like:

Upload d:\Storage\L-001\Part1.bmp to L-001/Part1.bmp failed: The type 'System.ReadOnlySpan`1[System.Byte]' of property 'Span' on type 'System.ReadOnlyMemory`1[System.Byte]' is invalid for serialization or deserialization because it is a pointer type, is a ref struct, or contains generic parameters that have not been replaced by specific types. from System.Text.Json
[2023-08-16 19:19:42.425 +08:00 INF] [2023-08-16 7:19:42 PM Info MinioUploader]Not find L-001/Part1.bmp: MinIO API responded with message=Not found. from Minio

I found the version 4.0.7 is good for the same file. I searched the release ntoes, and find the related updates in 5.0.0 from Compat Span, does it relavant to this issue?

4.0.7...5.0.0

The sample code is like:

// upload
                fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read);

                var poa = _putObjectArgs?
                    .WithObject(objName)
                    .WithStreamData(fs)
                    .WithObjectSize(fs.Length)
                    .WithContentType("application/octet-stream");
                // Upload a file to bucket.
                await _client.PutObjectAsync(poa);

                fs.Close();
...
                _logger?.Error($"Upload {filePath} to {objName} failed: {e.Message} from {e.Source}");

The environment info is:

• VS 2022 Community
• .NET SDK 6.0 LTS
• ASP.NET Core 6.0
• Minio 5.0.0

[martijn00]

@leolcao can you post the full stacktrace? This might have something to do with switching to ReadOnlyMemoryContent for a request on .NET6.

A lot of new work has already been done on it but is not released on Nuget yet. Could you run your test from the latest source code on this repo?

[leolcao]

hi @martijn00 , sorry, although I would like to help for such things, I don't have time to do that, or you may wait long time to get some results from me ~
I also have some interesting on the System.ReadOnlySpan stuff, but not sure when can give back some findings~

[leolcao]

This issue still have in the minio-dotnet 6.0.0 version.