How to upload files in batch?

[feni]

Suppose I have some files I'd like to upload to a folder on Dropbox using dropbox-sdk-python. Some of the files are more than 150 MB, some of them less than 1 MB.

The documentation recommends uploading many files in parallel and offers 6 functions for that:
```
'files_upload_session_append',
'files_upload_session_append_v2',
'files_upload_session_finish',
'files_upload_session_finish_batch',
'files_upload_session_finish_batch_check',
'files_upload_session_start'
```
There are a lot of recomendations in their documentation but I did not find a complete example for doing such a common thing. I did not use Dropbox API before and I dont know in which way I should organize all the upload functions. Can anybody share a complete example for batch uploading?

[Greg-DB]

We don't currently have an official sample for that using the Python SDK in particular, but I'll pass this along as request for one.

Here's an example I put together for uploading a large files using upload sessions though: (note, I haven't tested this extensively, and it doesn't have any error handling)

f = open(file_path)
file_size = os.path.getsize(file_path)

CHUNK_SIZE = 4 * 1024 * 1024

if file_size <= CHUNK_SIZE:

    print dbx.files_upload(f.read(), dest_path)

else:

    upload_session_start_result = dbx.files_upload_session_start(f.read(CHUNK_SIZE))
    cursor = dropbox.files.UploadSessionCursor(session_id=upload_session_start_result.session_id,
                                               offset=f.tell())
    commit = dropbox.files.CommitInfo(path=dest_path)

    while f.tell() <= file_size:
        if ((file_size - f.tell()) <= CHUNK_SIZE):
            print dbx.files_upload_session_finish(f.read(CHUNK_SIZE),
                                            cursor,
                                            commit)
            break
        else:
            dbx.files_upload_session_append_v2(f.read(CHUNK_SIZE),
                                            cursor)
            cursor.offset = f.tell()

f.close()

[feni]

It is very sad that such a big cloud storage does not have reliable uploading function in their SDK.