S3Uploader.cs

namespace HackMdBackup;

using Amazon;
using Amazon.S3;
using Amazon.S3.Transfer;
using System;
using System.Threading.Tasks;

public class S3Uploader
{
    private readonly string _bucketName;
    private static readonly RegionEndpoint BucketRegion = RegionEndpoint.USWest2; // change this based on your MinIO region

    private static IAmazonS3? _s3Client;

    public S3Uploader(string s3Host, string s3AccessKey, string s3SecretKey, string s3Bucket)
    {
        _bucketName = s3Bucket;
        _s3Client = new AmazonS3Client(s3AccessKey, s3SecretKey, new AmazonS3Config
        {
            ServiceURL = s3Host,
            ForcePathStyle = true,
        });

    }
    
    public async Task UploadFileAsync(string filePath)
    {
        try
        {
            var fileTransferUtility = new TransferUtility(_s3Client, new TransferUtilityConfig
            {
                MinSizeBeforePartUpload = 6L * 1024 * 1024 * 1024 // 6GB - effectively disable multipart upload
            });

            await fileTransferUtility.UploadAsync(filePath, _bucketName);
        }
        catch (Exception e)
        {
            throw new Exception("Unable to upload file to S3", e);
        }
    }
}