Updated Azure SDK version and refactoring

Author: alfonsof

azureblobstoragelistall/README.md

@@ -2,7 +2,7 @@
 
 This folder contains a Python application example that handles Blob storage on Microsoft Azure.
 
-List the blobs in all Blob Storage containers in an Azure storage account.
+List information about all Blob Storage containers and the blobs they contain in an Azure storage account.
 
 ## Requirements
 
@@ -14,12 +14,12 @@ List the blobs in all Blob Storage containers in an Azure storage account.
   * Python 3
   * Azure SDKs for Python
 
-* Install the Azure SDKs for Python.
+* You install individual Azure library packages on a per-project basis depending on your needs. It is recommended using Python virtual environments for each project. There is no standalone "SDK" installer for Python.
 
-  Install the latest stable version (supports Python 2.7 and 3.x) via pip:
+* Install the specified python packages.
 
   ```bash
-  pip install azure
+  pip install -r requirements.txt
   ```
 
 ## Using the code
@@ -95,26 +95,24 @@ List the blobs in all Blob Storage containers in an Azure storage account.
   
     1. Navigate to `Storage Account`.
     2. Select your storage account.
-    3. Select `Access keys` and you can see your Storage account name, connection strings and account keys.
+    3. Select `Access keys` and you can see your Storage account connection string.
 
   The connection string looks like this:
 
-    ```bash
-    DefaultEndpointsProtocol=https;AccountName=<ACCOUNT_NAME>;AccountKey=<ACCOUNT_KEY>;EndpointSuffix=core.windows.net
-    ```
+  ```bash
+  DefaultEndpointsProtocol=https;AccountName=<ACCOUNT_NAME>;AccountKey=<ACCOUNT_KEY>;EndpointSuffix=core.windows.net
+  ```
   
   The application configuration is stored in the `app.cfg` file. The file content is:
 
   ```bash
-  [StorageAuthentication]
-  AccountName=<ACCOUNT_NAME>
-  AccountKey=<ACCOUNT_KEY>
+  [Configuration]
+  StorageAccountConnectionString=<STORAGE_ACCOUNT_CONNECTION_STRING>
   ```
 
-  You must edit the `app.cfg` file and replace the values of:
+  You must edit the `app.cfg` file and replace the value of:
   
-  * `<ACCOUNT_NAME>` by the account name of your storage account.
-  * `<ACCOUNT_KEY>` by the account key of your storage account.
+  * `<STORAGE_ACCOUNT_CONNECTION_STRING>` by the connection string of your storage account.
   
   The application uses this information for accessing your Azure storage account.
 

azureblobstoragelistall/app.cfg

@@ -1,3 +1,2 @@
-[StorageAuthentication]
-AccountName=<ACCOUNT_NAME>
-AccountKey=<ACCOUNT_KEY>
+[Configuration]
+StorageAccountConnectionString=<STORAGE_ACCOUNT_CONNECTION_STRING>

azureblobstoragelistall/blobstoragelistall.py

@@ -2,17 +2,17 @@
 # -*- coding: utf-8 -*-
 # blobstoragelistall.py
 # It is an example that handles Blob Storage containers on Microsoft Azure.
-# List the blobs in all Blob Storage containers.
+# List information about all Blob Storage containers and the blobs they contain in an Azure storage account.
 
 import sys
 import os
 import configparser
-from azure.storage.blob import BlockBlobService, PublicAccess
+from azure.storage.blob import BlobServiceClient
 
 
-def loadcfg():
+def load_cfg():
     """
-    Read storage authentication information from a config file
+    Read storage account authentication information from a config file
     and return the values in a dictionary.
     """
     config_file = 'app.cfg'
@@ -23,37 +23,49 @@ def loadcfg():
         print('Config file "' + config_file + '" does not exist')
         sys.exit(1)
 
-    return dict(config.items('StorageAuthentication'))
+    return dict(config.items('Configuration'))
 
 
-def main():
-
-    # Read storage authentication information
-    config_dict = loadcfg()
-    cfg_account_name = config_dict['accountname']
-    cfg_account_key = config_dict['accountkey']
-
-    # Create the BlockBlockService that is used to call the Blob service for the storage account
-    block_blob_service = BlockBlobService(account_name=cfg_account_name, account_key=cfg_account_key)
+def list_containers(storage_account_conn_str):
+    """
+    List the containers and the blobs they contain in a storage account
+    """
+    # Create the BlobServiceClient object which will be used to create a container client
+    blob_service_client = BlobServiceClient.from_connection_string(storage_account_conn_str)
 
     try:
+        print('Listing Blob Storage containers ...')
         # List the containers
-        containers_list = block_blob_service.list_containers()
-        for container in containers_list:
+        container_list = blob_service_client.list_containers()
+        for container in container_list:
+            # Get the container object
+            container_client = blob_service_client.get_container_client(container)
             # List the blobs in the container
-            print('List of blobs in Blob Storage container "'+ container.name + '":')
-            blobs_list = block_blob_service.list_blobs(container.name)
-            for blob in blobs_list:
-                props = blob.properties
-                print('- Blob name: ' + blob.name)
-                print('       size: ', props.content_length)
+            print('* Blob container "' + container.name + '", list of blobs:')
+            blob_list = container_client.list_blobs()
+            for blob in blob_list:
+                print('  - Blob name: ' + blob.name)
+                print('         size: ', blob.size)
+
     except Exception as e:
         print("\nError:")
         print(e)
 
     return
 
 
+def main():
+
+    # Read storage account authentication information
+    config_dict = load_cfg()
+    cfg_storage_account_conn_str = config_dict['storageaccountconnectionstring']
+
+    # List the containers in the storage account
+    list_containers(cfg_storage_account_conn_str)
+
+    return
+
+
 # This is the standard boilerplate that calls the main() function.
 if __name__ == '__main__':
     main()

azureblobstoragelistall/requirements.txt

@@ -0,0 +1 @@
+azure-storage-blob