openapi: 3.1.0
info:
  title: CubeFS Master ACLs Objects API
  description: The CubeFS Master API provides HTTP endpoints for administering a CubeFS distributed storage cluster. The Master node is the control plane for all cluster operations including volume lifecycle management, data and metadata node administration, user and access key management, and cluster health monitoring. All endpoints are served over HTTP on the Master node's listen port (default 17010) and accept query string parameters. Responses are JSON objects with a code field indicating success (200) or error.
  version: '3.3'
  contact:
    name: CubeFS Community
    url: https://cubefs.io/community/overview.html
servers:
- url: http://{masterHost}:{masterPort}
  description: CubeFS Master node HTTP API server
  variables:
    masterHost:
      default: 127.0.0.1
      description: IP address or hostname of the CubeFS Master node.
    masterPort:
      default: '17010'
      description: Listening port of the CubeFS Master node.
tags:
- name: Objects
  description: Object CRUD operations including uploading, downloading, copying, listing, and deleting objects. Supports both standard single-part uploads and multipart uploads for large objects.
paths:
  /{bucket}:
    get:
      operationId: listObjects
      summary: CubeFS List objects in a bucket
      description: Returns a list of objects in a bucket. Supports prefix filtering, delimiter-based grouping for simulating directory hierarchies, and pagination via continuation tokens. Returns up to 1000 objects per request by default.
      tags:
      - Objects
      parameters:
      - $ref: '#/components/parameters/bucket'
      - name: prefix
        in: query
        required: false
        description: Only return objects whose keys begin with this prefix.
        schema:
          type: string
      - name: delimiter
        in: query
        required: false
        description: Character used to group keys. Keys with the same string between the prefix and the first occurrence of the delimiter are grouped under a common prefix.
        schema:
          type: string
      - name: max-keys
        in: query
        required: false
        description: Maximum number of objects to return. Defaults to 1000.
        schema:
          type: integer
          minimum: 1
          maximum: 1000
      - name: continuation-token
        in: query
        required: false
        description: Continuation token for paginating through large result sets.
        schema:
          type: string
      - name: list-type
        in: query
        required: false
        description: Set to 2 to use the List Objects V2 format with continuation tokens.
        schema:
          type: integer
          enum:
          - 2
      responses:
        '200':
          description: Object list retrieved successfully.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/ListBucketResult'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /{bucket}/{key}:
    put:
      operationId: putObject
      summary: CubeFS Upload an object
      description: Uploads an object to the specified bucket at the given key path. The object data is provided in the request body. The Content-Type and Content-Length headers should be set appropriately. Server-side encryption, metadata, and ACL settings can be specified via headers.
      tags:
      - Objects
      parameters:
      - $ref: '#/components/parameters/bucket'
      - $ref: '#/components/parameters/key'
      - name: Content-Type
        in: header
        required: false
        description: MIME type of the object being uploaded.
        schema:
          type: string
      - name: Content-MD5
        in: header
        required: false
        description: Base64-encoded MD5 digest of the request body for integrity verification.
        schema:
          type: string
      - name: x-amz-acl
        in: header
        required: false
        description: Canned ACL to apply to the object.
        schema:
          type: string
          enum:
          - private
          - public-read
          - public-read-write
          - authenticated-read
      requestBody:
        required: true
        content:
          application/octet-stream:
            schema:
              type: string
              format: binary
              description: Binary content of the object to upload.
      responses:
        '200':
          description: Object uploaded successfully.
          headers:
            ETag:
              description: Entity tag (MD5 hash) of the uploaded object.
              schema:
                type: string
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    get:
      operationId: getObject
      summary: CubeFS Download an object
      description: Downloads the content of an object from the specified bucket at the given key. Supports range requests for partial content downloads and conditional requests based on ETag or modification time.
      tags:
      - Objects
      parameters:
      - $ref: '#/components/parameters/bucket'
      - $ref: '#/components/parameters/key'
      - name: Range
        in: header
        required: false
        description: Byte range for partial content download, e.g. bytes=0-1023.
        schema:
          type: string
      - name: If-Match
        in: header
        required: false
        description: Only return the object if its ETag matches.
        schema:
          type: string
      - name: If-Modified-Since
        in: header
        required: false
        description: Only return the object if it was modified after this date.
        schema:
          type: string
          format: date-time
      responses:
        '200':
          description: Object downloaded successfully.
          headers:
            Content-Type:
              description: MIME type of the object.
              schema:
                type: string
            ETag:
              description: Entity tag of the object.
              schema:
                type: string
            Last-Modified:
              description: Timestamp when the object was last modified.
              schema:
                type: string
          content:
            application/octet-stream:
              schema:
                type: string
                format: binary
                description: Object content.
        '304':
          description: Object not modified (conditional request).
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    head:
      operationId: headObject
      summary: CubeFS Get object metadata
      description: Returns metadata for the specified object without downloading its content. Returns the same headers as GetObject but with an empty body. Useful for checking existence, size, and ETag before downloading.
      tags:
      - Objects
      parameters:
      - $ref: '#/components/parameters/bucket'
      - $ref: '#/components/parameters/key'
      responses:
        '200':
          description: Object metadata retrieved successfully.
          headers:
            Content-Type:
              description: MIME type of the object.
              schema:
                type: string
            Content-Length:
              description: Size of the object in bytes.
              schema:
                type: integer
            ETag:
              description: Entity tag of the object.
              schema:
                type: string
            Last-Modified:
              description: Timestamp when the object was last modified.
              schema:
                type: string
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteObject
      summary: CubeFS Delete an object
      description: Deletes a single object from a bucket. The operation is idempotent — deleting a non-existent object returns a 204 with no error.
      tags:
      - Objects
      parameters:
      - $ref: '#/components/parameters/bucket'
      - $ref: '#/components/parameters/key'
      responses:
        '204':
          description: Object deleted successfully.
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  responses:
    BadRequest:
      description: The request was malformed or contained invalid parameters.
      content:
        application/xml:
          schema:
            $ref: '#/components/schemas/S3Error'
    Unauthorized:
      description: Authentication credentials are missing, invalid, or the signature does not match.
      content:
        application/xml:
          schema:
            $ref: '#/components/schemas/S3Error'
    NotFound:
      description: The specified bucket or object does not exist.
      content:
        application/xml:
          schema:
            $ref: '#/components/schemas/S3Error'
  schemas:
    ObjectInfo:
      type: object
      description: Metadata about an object in a bucket.
      properties:
        Key:
          type: string
          description: Object key.
        LastModified:
          type: string
          format: date-time
          description: Timestamp when the object was last modified.
        ETag:
          type: string
          description: MD5 hash of the object content.
        Size:
          type: integer
          description: Size of the object in bytes.
        StorageClass:
          type: string
          description: Storage class of the object.
        Owner:
          $ref: '#/components/schemas/Owner'
    CommonPrefix:
      type: object
      description: Common prefix resulting from delimiter-based grouping.
      properties:
        Prefix:
          type: string
          description: The common prefix string.
    S3Error:
      type: object
      description: S3-compatible error response in XML format.
      properties:
        Code:
          type: string
          description: S3 error code such as NoSuchBucket, InvalidBucketName, or BucketNotEmpty.
        Message:
          type: string
          description: Human-readable error message.
        Resource:
          type: string
          description: The bucket or object that the error applies to.
        RequestId:
          type: string
          description: Unique identifier for the request, useful for debugging.
    Owner:
      type: object
      description: Owner of a bucket or object.
      properties:
        ID:
          type: string
          description: CubeFS user ID of the owner.
        DisplayName:
          type: string
          description: Display name of the owner.
    ListBucketResult:
      type: object
      description: Result of listing objects in a bucket.
      properties:
        Name:
          type: string
          description: Name of the bucket.
        Prefix:
          type: string
          description: Filter prefix used in the request.
        Delimiter:
          type: string
          description: Delimiter used for grouping.
        MaxKeys:
          type: integer
          description: Maximum number of keys returned.
        IsTruncated:
          type: boolean
          description: Whether the results were truncated due to MaxKeys.
        NextContinuationToken:
          type: string
          description: Token to use for the next page of results when IsTruncated is true.
        Contents:
          type: array
          description: List of objects matching the request.
          items:
            $ref: '#/components/schemas/ObjectInfo'
        CommonPrefixes:
          type: array
          description: List of common prefixes from delimiter grouping.
          items:
            $ref: '#/components/schemas/CommonPrefix'
  parameters:
    key:
      name: key
      in: path
      required: true
      description: Object key (path within the bucket). Use forward slashes to simulate directory hierarchies.
      schema:
        type: string
    bucket:
      name: bucket
      in: path
      required: true
      description: Name of the S3 bucket (corresponds to a CubeFS volume name).
      schema:
        type: string
        minLength: 3
        maxLength: 63
        pattern: ^[a-z0-9][a-z0-9\-]*[a-z0-9]$
externalDocs:
  description: CubeFS Master Admin API Reference
  url: https://cubefs.io/docs/master/dev-guide/admin-api/master/