how to transfer file to azure blob storage in chunks without writing to file using python -


i need transfer files google cloud storage azure blob storage.

google gives code snippet download files byte variable so:

# payload data req = client.objects().get_media(         bucket=bucket_name,         object=object_name,         generation=generation)    # optional # bytesio object may replaced io.base instance. fh = io.bytesio() downloader = mediaiobasedownload(fh, req, chunksize=1024*1024) done = false while not done:     status, done = downloader.next_chunk()     if status:         print 'download %d%%.' % int(status.progress() * 100)     print 'download complete!' print fh.getvalue()

i able modify store file changing fh object type so:

fh = open(object_name, 'wb')

then can upload azure blob storage using blob_service.put_block_blob_from_path.

i want avoid writing local file on machine doing transfer.

i gather google's snippet loads data io.bytesio() object chunk @ time. reckon should use write blob storage chunk @ time.

i experimented reading whole thing memory, , uploading using put_block_blob_from_bytes, got memory error (file big (~600mb).

any suggestions?

according source codes of blobservice.py azure storage , blobreader google cloud storage, can try use azure function blobservice.put_block_blob_from_file write stream gcs class blobreader has function read stream, please see below.

enter image description here

enter image description here

so refering code https://cloud.google.com/appengine/docs/python/blobstore/#python_using_blobreader, can try below.

from google.appengine.ext import blobstore azure.storage.blob import blobservice  blob_key = ... blob_reader = blobstore.blobreader(blob_key)  blob_service = blobservice(account_name, account_key) container_name = ... blob_name = ... blobservice.put_block_blob_from_file(container_name, blob_name, blob_reader)

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