如何从一个minio服务器复制到另一个？

Question

I am using Minio's JAVA SDK. I managed to copy objects within the same Minio Server. Is there a way to copy the objects from one Minio server to another?

I have tried using the below code:

InputStream inputStream = minioClientServer1.getObject(getBucket(), fileName);
minioClientServer2.putObject(getBucket(), fileName, inputStream, (long) inputStream.available(), null, null, contentType);

That is I got the object from one server and then uploaded to the next. The problem that I'm facing is that the contentType is unknown.

Is there a way to do this without hard coding the content type? Or downloading the object to a file then uploading is a better way?

Answer 1

I'm not sure that this applies to you because you don't provide enough information for me to be sure we're talking about the same SDK. But from what you show, you should be able to call statObject in the same way that you call getObject and get an ObjectStat instance rather than an InputStream instance for a particular S3 object. Once you have an ObjectStat instance, you should be able to call the contentType method on it to get the content type of the S3 object.

This should work to do what you're asking:

ObjectStat objectStat = minioClientServer1.statObject(getBucket(), fileName);
InputStream inputStream = minioClientServer1.getObject(getBucket(), fileName);
minioClientServer2.putObject(getBucket(), fileName, inputStream, (long) inputStream.available(), null, null, objectStat.contentType());