class AzureBlob::Client

def put_blob_block(key, index, content, options = {})

Must be the checksum for the block not the blob. The checksum must be a base64 digest. Can be produced with +OpenSSL::Digest::MD5.base64digest+.
[+:content_md5+]

Options:

Returns the id of the block. Required to commit the list of blocks to a blob.

Calls to {Put Block}[https://learn.microsoft.com/en-us/rest/api/storageservices/put-block]

Uploads a block to a blob. 
def put_blob_block(key, index, content, options = {})
  block_id = generate_block_id(index)
  uri = generate_uri("#{container}/#{key}")
  uri.query = URI.encode_www_form(comp: "block", blockid: block_id)
  headers = {
    "Content-Length": content.size,
    "Content-Type": options[:content_type],
    "Content-MD5": options[:content_md5],
  }
  Http.new(uri, headers, signer:).put(content)
  block_id
end