openapi: 3.1.0
info:
  title: Azure Blob Storage REST Append Blobs API
  description: The Azure Blob Storage REST API provides programmatic access to unstructured data storage in Azure. It supports operations on the Blob service, containers, and blobs, including block blobs, append blobs, and page blobs. Blobs can store any type of text or binary data such as documents, media files, and application installers. Blob Storage is optimized for storing massive amounts of unstructured data accessible via HTTP or HTTPS from anywhere in the world.
  version: '2024-11-04'
  contact:
    name: Microsoft Azure Support
    url: https://azure.microsoft.com/en-us/support/
  termsOfService: https://azure.microsoft.com/en-us/support/legal/
servers:
- url: https://{accountName}.blob.core.windows.net
  description: Azure Blob Storage endpoint
  variables:
    accountName:
      description: The name of the Azure Storage account
      default: mystorageaccount
security:
- sharedKey: []
- bearerAuth: []
- sharedAccessSignature: []
tags:
- name: Append Blobs
  description: Operations specific to append blobs including append block
paths:
  /{container}/{blob}?comp=appendblock:
    put:
      operationId: appendBlock
      summary: Azure Blob Storage Append block
      description: Commits a new block of data to the end of an existing append blob. Each block can be up to 4 MiB in size. An append blob can contain up to 50,000 blocks.
      tags:
      - Append Blobs
      parameters:
      - $ref: '#/components/parameters/ContainerName'
      - $ref: '#/components/parameters/BlobName'
      - $ref: '#/components/parameters/ApiVersion'
      requestBody:
        content:
          application/octet-stream:
            schema:
              type: string
              format: binary
      responses:
        '201':
          description: Block appended successfully
  /{container}/{blob}?comp=appendblock&fromURL:
    put:
      operationId: appendBlockFromURL
      summary: Azure Blob Storage Append block from URL
      description: Commits a new block of data to the end of an append blob where the contents are read from a source URL.
      tags:
      - Append Blobs
      parameters:
      - $ref: '#/components/parameters/ContainerName'
      - $ref: '#/components/parameters/BlobName'
      - $ref: '#/components/parameters/ApiVersion'
      - name: x-ms-copy-source
        in: header
        required: true
        description: URL of the source data to append.
        schema:
          type: string
          format: uri
      responses:
        '201':
          description: Block appended from URL
components:
  parameters:
    ContainerName:
      name: container
      in: path
      required: true
      description: The container name. Must be a valid DNS name, 3 to 63 characters, starting with a letter or number, and containing only lowercase letters, numbers, and hyphens.
      schema:
        type: string
        pattern: ^[a-z0-9](?!.*--)[a-z0-9-]{1,61}[a-z0-9]$
    BlobName:
      name: blob
      in: path
      required: true
      description: The blob name. Can contain any combination of characters and may include path separators (/) for organizing blobs in a virtual directory hierarchy.
      schema:
        type: string
    ApiVersion:
      name: x-ms-version
      in: header
      required: true
      description: Specifies the version of the Azure Storage REST API to use for the request.
      schema:
        type: string
        default: '2024-11-04'
  securitySchemes:
    sharedKey:
      type: apiKey
      in: header
      name: Authorization
      description: Azure Storage shared key authorization using the storage account access key.
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: Microsoft Entra ID OAuth 2.0 bearer token for accessing blob resources.
    sharedAccessSignature:
      type: apiKey
      in: query
      name: sig
      description: Shared access signature (SAS) token granting delegated access to blob resources.
externalDocs:
  description: Azure Blob Storage REST API Documentation
  url: https://learn.microsoft.com/en-us/rest/api/storageservices/blob-service-rest-api