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# coding: utf-8
# -------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See License.txt in the project root for
# license information.
# --------------------------------------------------------------------------
"""
FILE: blob_samples_hello_world.py
DESCRIPTION:
This sample demos basic blob operations like getting a blob client from container, uploading and downloading
a blob using the blob_client.
USAGE: python blob_samples_hello_world.py
Set the environment variables with your own values before running the sample:
1) STORAGE_CONNECTION_STRING - the connection string to your storage account
"""
import os
import sys
# set up
current_dir = os.path.dirname(os.path.abspath(__file__))
SOURCE_FILE = os.path.join(current_dir, 'SampleSource.txt')
DEST_FILE = os.path.join(current_dir, 'BlockDestination.txt')
class BlobSamples(object):
connection_string = os.getenv("STORAGE_CONNECTION_STRING")
#--Begin Blob Samples-----------------------------------------------------------------
def create_container_sample(self):
if self.connection_string is None:
print("Missing required environment variable: STORAGE_CONNECTION_STRING." + '\n' +
"Test: create_container_sample")
sys.exit(1)
# Instantiate a new BlobServiceClient using a connection string
from azure.storage.blob import BlobServiceClient
blob_service_client = BlobServiceClient.from_connection_string(self.connection_string)
# Instantiate a new ContainerClient
container_client = blob_service_client.get_container_client("mycontainer11")
try:
# Create new container in the service
container_client.create_container()
# List containers in the storage account
list_response = blob_service_client.list_containers()
finally:
# Delete the container
container_client.delete_container()
def block_blob_sample(self):
if self.connection_string is None:
print("Missing required environment variable: STORAGE_CONNECTION_STRING." + '\n' +
"Test: block_blob_sample")
sys.exit(1)
# Instantiate a new BlobServiceClient using a connection string
from azure.storage.blob import BlobServiceClient
blob_service_client = BlobServiceClient.from_connection_string(self.connection_string)
# Instantiate a new ContainerClient
container_client = blob_service_client.get_container_client("myblockcontainersync1")
try:
# Create new Container in the service
container_client.create_container()
# Instantiate a new BlobClient
blob_client = container_client.get_blob_client("myblockblob")
# [START upload_a_blob]
# Upload content to block blob
with open(SOURCE_FILE, "rb") as data:
blob_client.upload_blob(data, blob_type="BlockBlob")
# [END upload_a_blob]
# [START download_a_blob]
with open(DEST_FILE, "wb") as my_blob:
download_stream = blob_client.download_blob()
my_blob.write(download_stream.readall())
# [END download_a_blob]
# [START delete_blob]
blob_client.delete_blob()
# [END delete_blob]
finally:
# Delete the container
container_client.delete_container()
def stream_block_blob(self):
if self.connection_string is None:
print("Missing required environment variable: STORAGE_CONNECTION_STRING." + '\n' +
"Test: stream_block_blob")
sys.exit(1)
import uuid
# Instantiate a new BlobServiceClient using a connection string - set chunk size to 1MB
from azure.storage.blob import BlobServiceClient, BlobBlock
blob_service_client = BlobServiceClient.from_connection_string(self.connection_string,
max_single_get_size=1024*1024,
max_chunk_get_size=1024*1024)
# Instantiate a new ContainerClient
container_client = blob_service_client.get_container_client("containersync1")
# Generate 4MB of data
data = b'a'*4*1024*1024
try:
# Create new Container in the service
container_client.create_container()
# Instantiate a new source blob client
source_blob_client = container_client.get_blob_client("source_blob")
# Upload content to block blob
source_blob_client.upload_blob(data, blob_type="BlockBlob")
destination_blob_client = container_client.get_blob_client("destination_blob")
# [START download_a_blob_in_chunk]
# This returns a StorageStreamDownloader.
stream = source_blob_client.download_blob()
block_list = []
# Read data in chunks to avoid loading all into memory at once
for chunk in stream.chunks():
# process your data (anything can be done here really. `chunk` is a byte array).
block_id = str(uuid.uuid4())
destination_blob_client.stage_block(block_id=block_id, data=chunk)
block_list.append(BlobBlock(block_id=block_id))
# [END download_a_blob_in_chunk]
# Upload the whole chunk to azure storage and make up one blob
destination_blob_client.commit_block_list(block_list)
finally:
# Delete container
container_client.delete_container()
def page_blob_sample(self):
if self.connection_string is None:
print("Missing required environment variable: STORAGE_CONNECTION_STRING." + '\n' +
"Test: page_blob_sample")
sys.exit(1)
# Instantiate a new BlobServiceClient using a connection string
from azure.storage.blob import BlobServiceClient
blob_service_client = BlobServiceClient.from_connection_string(self.connection_string)
# Instantiate a new ContainerClient
container_client = blob_service_client.get_container_client("mypagecontainersync1")
try:
# Create new Container in the Service
container_client.create_container()
# Instantiate a new BlobClient
blob_client = container_client.get_blob_client("mypageblob")
# Upload content to the Page Blob
data = b'abcd'*128
blob_client.upload_blob(data, blob_type="PageBlob")
# Download Page Blob
with open(DEST_FILE, "wb") as my_blob:
download_stream = blob_client.download_blob()
my_blob.write(download_stream.readall())
# Delete Page Blob
blob_client.delete_blob()
finally:
# Delete container
container_client.delete_container()
def append_blob_sample(self):
if self.connection_string is None:
print("Missing required environment variable: STORAGE_CONNECTION_STRING." + '\n' +
"Test: append_blob_sample")
sys.exit(1)
# Instantiate a new BlobServiceClient using a connection string
from azure.storage.blob import BlobServiceClient
blob_service_client = BlobServiceClient.from_connection_string(self.connection_string)
# Instantiate a new ContainerClient
container_client = blob_service_client.get_container_client("myappendcontainersync1")
try:
# Create new Container in the Service
container_client.create_container()
# Instantiate a new BlobClient
blob_client = container_client.get_blob_client("myappendblob")
# Upload content to the Page Blob
with open(SOURCE_FILE, "rb") as data:
blob_client.upload_blob(data, blob_type="AppendBlob")
# Download Append Blob
with open(DEST_FILE, "wb") as my_blob:
download_stream = blob_client.download_blob()
my_blob.write(download_stream.readall())
# Delete Append Blob
blob_client.delete_blob()
finally:
# Delete container
container_client.delete_container()
if __name__ == '__main__':
sample = BlobSamples()
sample.create_container_sample()
sample.block_blob_sample()
sample.append_blob_sample()
sample.page_blob_sample()
sample.stream_block_blob()
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