openapi: 3.1.0
info:
  title: Google Pub/Sub Google Cloud Pub/Sub Publish Subscribe API
  description: Provides reliable, many-to-many, asynchronous messaging between applications. The Pub/Sub API allows you to create and manage topics and subscriptions, publish messages, and pull or push messages to subscribers.
  version: v1
  contact:
    name: Google Cloud
    url: https://cloud.google.com/pubsub
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
servers:
- url: https://pubsub.googleapis.com
  description: Google Cloud Pub/Sub API
security:
- oauth2:
  - https://www.googleapis.com/auth/pubsub
- bearerAuth: []
tags:
- name: Subscribe
  description: Pull and acknowledge messages
paths:
  /v1/{subscription}:pull:
    post:
      operationId: pull
      summary: Google Pub/Sub Pull messages
      description: Pulls messages from the server. The server may return UNAVAILABLE if there are too many concurrent pull requests pending for the given subscription.
      tags:
      - Subscribe
      parameters:
      - name: subscription
        in: path
        required: true
        description: The subscription name.
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PullRequest'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PullResponse'
  /v1/{subscription}:acknowledge:
    post:
      operationId: acknowledge
      summary: Google Pub/Sub Acknowledge messages
      description: Acknowledges the messages associated with the ack_ids in the AcknowledgeRequest. The Pub/Sub system can remove the relevant messages from the subscription.
      tags:
      - Subscribe
      parameters:
      - name: subscription
        in: path
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - ackIds
              properties:
                ackIds:
                  type: array
                  items:
                    type: string
      responses:
        '200':
          description: Successful response
  /v1/{subscription}:modifyAckDeadline:
    post:
      operationId: modifyAckDeadline
      summary: Google Pub/Sub Modify acknowledgement deadline
      description: Modifies the ack deadline for a specific message. Useful to indicate that more time is needed to process a message.
      tags:
      - Subscribe
      parameters:
      - name: subscription
        in: path
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - ackIds
              - ackDeadlineSeconds
              properties:
                ackIds:
                  type: array
                  items:
                    type: string
                ackDeadlineSeconds:
                  type: integer
      responses:
        '200':
          description: Successful response
components:
  schemas:
    PullResponse:
      type: object
      properties:
        receivedMessages:
          type: array
          items:
            $ref: '#/components/schemas/ReceivedMessage'
    PullRequest:
      type: object
      required:
      - maxMessages
      properties:
        maxMessages:
          type: integer
          description: Maximum number of messages to return.
    ReceivedMessage:
      type: object
      properties:
        ackId:
          type: string
        message:
          $ref: '#/components/schemas/PubsubMessage'
        deliveryAttempt:
          type: integer
    PubsubMessage:
      type: object
      properties:
        data:
          type: string
          format: byte
          description: The message data (base64-encoded).
        attributes:
          type: object
          additionalProperties:
            type: string
        messageId:
          type: string
        publishTime:
          type: string
          format: date-time
        orderingKey:
          type: string
  securitySchemes:
    oauth2:
      type: oauth2
      flows:
        authorizationCode:
          authorizationUrl: https://accounts.google.com/o/oauth2/auth
          tokenUrl: https://oauth2.googleapis.com/token
          scopes:
            https://www.googleapis.com/auth/pubsub: Manage Pub/Sub resources
            https://www.googleapis.com/auth/cloud-platform: Full access to Google Cloud
    bearerAuth:
      type: http
      scheme: bearer