StatObjectAsync does not throw exception when object or bucket does not exist

[MihaiDaniel]

As per specifications found here:

• 3. Object operations

And in this tutorial

• How to Download MinIO Objects with .Net

When calling StatObjectAsync the method should throw an exception if the object is not found. But instead this seems to return an ObjectStat with default values instead.

I don't know if this is intended or not. I have not done anything special just installed it locally on windows 10, ran it and connected using a .NET 8 client. In the example below I just check the ETag if it's null or not, but I'm not sure if this is the best approach.

using IMinioClient minioClient = _minioClientFactory.CreateClient();
minioClient.WithSSL(false);

StatObjectArgs statObjectArgs = new StatObjectArgs()
	.WithBucket("notexists")
	.WithObject("randomStuff123456789");

ObjectStat objectStat = await minioClient.StatObjectAsync(statObjectArgs);
if (objectStat.ETag == null)	
{
	return NotFound(false);
}
return Ok(true);

Thanks

[Mr-TTWang]

I meet it as well o(╥﹏╥)o

[ebozduman]

working on this...

[ebozduman]

@MihaiDaniel , @pangjianxin , @SamirWell

I've tested and verified the fix, but please reopen the PR if the fix does not work in your scenario.