// PutBlockBlob uploads given stream into a block blob by splitting
// data stream into chunks and uploading as blocks. Commits the block
// list at the end. This is a helper method built on top of PutBlock
// and PutBlockList methods with sequential block ID counting logic.
func putBlockBlob(b storage.BlobStorageClient, container, name string, blob io.Reader, chunkSize int) error {
if chunkSize <= 0 || chunkSize > storage.MaxBlobBlockSize {
chunkSize = storage.MaxBlobBlockSize
}
chunk := make([]byte, chunkSize)
n, err := blob.Read(chunk)
if err != nil && err != io.EOF {
return err
}
blockList := []storage.Block{}
for blockNum := 0; ; blockNum++ {
id := base64.StdEncoding.EncodeToString([]byte(fmt.Sprintf("%011d", blockNum)))
data := chunk[:n]
err = b.PutBlock(container, name, id, data)
if err != nil {
return err
}
blockList = append(blockList, storage.Block{id, storage.BlockStatusLatest})
// Read next block
n, err = blob.Read(chunk)
if err != nil && err != io.EOF {
return err
}
if err == io.EOF {
break
}
}
return b.PutBlockList(container, name, blockList)
}
