Delete deletes the file pointed to by key.

Exist checks if the file pointed to by key exists.

Get gets the file pointed to by key.

GetPresignedURL gets the presigned URL for the file pointed to by key.

GetUploadPresignedURL gets the presigned URL for the file upload, use PUT method in frontend.

GetWithPath downloads and saves the object as a file in the local filesystem by key.

Put uploads the content from r to the oss key.

PutByPath uploads the content from a file to the oss key.

PutBytes uploads the byte array content to the oss key.

Size returns the size of the file pointed to by key.