Azure Blob Storage

Azure Blob Storage is used to store arbitrary unstructured data like images, files, backups, etc. Aidbox offers integration with Blob Storage to simplify upload and retrieval of data. You can read more on Blob Storage internals here. All examples from this tutorial are executable in the Aidbox REST console.

Set up Azure storage account

First of all, we have to create AzureAccount resource with id = account name and key = secret key of your account. Your account name and keys can be found under "Access keys" section in Azure Storage account settings.

Request

Parameters

• id (required): Azure storage Account name

• key (required): Azure storage Account key

Example

POST /AzureAccount

id: aidbox
key: long-base64-encoded-string

Register AzureContainer

Go to Azure console and create a container, for example, "avatars". Now we can create an AzureContainer resource:

Request

Parameters

• id (optional): id to reference this container in Aidbox requests

• account (required): reference to AzureAccount resource

• storage (required): Azure resource group name

• container (required): Azure container name

Example

POST /AzureContainer

id: avatars
account: {id: aidbox, resourceType: AzureAccount}
storage: aidbox
container: avatars

Get Shared Access Signature (SAS) to upload file

When the configuration is complete, you can request a temporary URL to upload blobs. By default, such URL expires in 30 minutes. You can provide a blob name or just the extension (name will be generated).

Request

Body parameters

• blob (required): file name

• timeout (optional, default: 30): timeout in minutes

Example

POST /azure/storage/avatars

blob: pt-1.png

Response

Body

• url: signed url to upload file

Example

url:  https://aidbox.blob.core.windows.net/avatars/pt-1.png?sr=signature

Configure CORS in Azure if you want to send data from the browser:

Now you can upload file from your UI using signed URL provided by Aidbox:

//onChange input[type=file]
var file = inputEvent.file.originFileObj;
fetch("<signed-url>", { 
   method: 'PUT', 
   body: file, 
   headers: {'x-ms-blob-type': 'BlockBlob'}
 }).then(...)

Get SAS to read a file

To read the uploaded file you can request a signed URL with:

GET /azure/storage/avatar/pt-1.png

---
status: 200
url: <read-signed-url>

# or

GET /azure/storage/avatar/pt-1.png?redirect=true

---
status: 302
headers:
  Location: <read-signed-url>

For example, you can use a trick with redirect to render an image:

<img src="/azure/storage/avatar/pt-1.png?redirect=true"/>