// However, in case of encryption, the persisted part ETags don't match
	// what we have sent to the client during PutObjectPart. The reason is
	// that ETags are encrypted. Hence, the client will send a list of complete
	// part ETags of which may not match the ETag of any part. For example
	//   ETag (client):          30902184f4e62dd8f98f0aaff810c626

			// write error response only if no data or headers has been written to client yet
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}
		return
	}

	if err = httpWriter.Close(); err != nil {
		if !httpWriter.HasWritten() && !statusCodeWritten { // write error response only if no data or headers has been written to client yet
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}

					// successfully the content to client for
					// the specific part, we should `nil` this error
					// and proceed forward, instead of throwing errors.
					err = nil
				}
			}
			if err != nil {
				return toObjectErr(err, bucket, object)
			}
		}
		// Track total bytes read from disk and written to the client.
		totalBytesRead += partLength

	"github.com/minio/mux"
	"github.com/minio/pkg/v3/policy"
	"github.com/minio/sio"
)

// Multipart objectAPIHandlers

// NewMultipartUploadHandler - New multipart upload.
// Notice: The S3 client can send secret keys in headers for encryption related jobs,
// the handler should ensure to remove these keys before sending them to the object layer.
// Currently these keys are:
//   - X-Amz-Server-Side-Encryption-Customer-Key