OpenIntegrations/docs/en/examples/S3/UploadObjectPart.txt

    URL    = "storage-155.s3hoster.by";
    AccessKey = "BRN5RKJE67...";
    SecretKey = "NNhv+i9PrytpT8Tu0C1N...";
    Region    = "BTC";

    BasicData = OPI_S3.GetBasicDataStructure(URL, AccessKey, SecretKey, Region);

    Name   = "fileChunked.mp3";
    Bucket = "opi-gpbucket3";

    Entity = "https://api.athenaeum.digital/test_data/song.mp3"; // URL, Path or Binary Data
    Entity = OPI_Tools.Get(Entity);

    Result = OPI_S3.InitPartsUpload(Name, Bucket, BasicData);

    UploadID   = Result["response"]["InitiateMultipartUploadResult"]["UploadId"];
    TotalSize  = Entity.Size();
    ChunkSize  = 5242880;
    BytesRead  = 0;
    PartNumber = 1;

    DataReader   = New DataReader(Entity);
    SourceStream = DataReader.SourceStream();
    TagsArray    = New Array;

    WHile BytesRead < TotalSize Do

        CurrentReading = DataReader.Read(ChunkSize);
        CurrentData    = CurrentReading.GetBinaryData();

        If CurrentData.Size() = 0 Then
            Break;
        EndIf;

        Result = OPI_S3.UploadObjectPart(Name, Bucket, BasicData, UploadID, PartNumber,
            CurrentData);

        // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

        BytesRead = SourceStream.CurrentPosition();
        TagsArray.Add(Result["headers"]["Etag"]);

        Break;

        PartNumber = PartNumber + 1;

    EndDo;

    Result = OPI_S3.FinishPartsUpload(Name, Bucket, BasicData, UploadID, TagsArray);