> ## Documentation Index
> Fetch the complete documentation index at: https://docs.eorion.com/llms.txt
> Use this file to discover all available pages before exploring further.

# 获取流程变量(二进制)

> Retrieves the content of a Process Variable by the Process Instance id and the Process Variable name.
Applicable for byte array or file Process Variables.



## OpenAPI

````yaml GET /process-instance/{id}/variables/{varName}/data
openapi: 3.0.2
info:
  title: ORION Platform REST API
  description: OpenApi Spec for ORION Camunda Platform REST API.
  version: 7.22.6-ee
  license:
    name: Apache License 2.0
    url: http://www.apache.org/licenses/LICENSE-2.0.html
servers:
  - url: http://{host}:{port}/{contextPath}
    description: The API server for the default process engine
    variables:
      host:
        default: localhost
      port:
        default: '8080'
      contextPath:
        default: engine-rest
  - url: http://{host}:{port}/{contextPath}/engine/{engineName}
    description: The API server for a named process engine
    variables:
      host:
        default: localhost
      port:
        default: '8080'
      contextPath:
        default: engine-rest
      engineName:
        default: default
  - url: '{url}'
    description: The API server with a custom url
    variables:
      url:
        default: ''
security:
  - basicAuth: []
tags:
  - name: Authorization
  - name: Batch
  - name: Condition
  - name: Decision Definition
  - name: Decision Requirements Definition
  - name: Deployment
  - name: Engine
  - name: Event Subscription
  - name: Execution
  - name: External Task
  - name: Filter
  - name: Group
  - name: Historic Activity Instance
  - name: Historic Batch
  - name: Historic Decision Definition
  - name: Historic Decision Instance
  - name: Historic Decision Requirements Definition
  - name: Historic Detail
  - name: Historic External Task Log
  - name: Historic Identity Link Log
  - name: Historic Incident
  - name: Historic Job Log
  - name: Historic Process Definition
  - name: Historic Process Instance
  - name: Historic Task Instance
  - name: Historic User Operation Log
  - name: Historic Variable Instance
  - name: History Cleanup
  - name: Identity
  - name: Incident
  - name: Job
  - name: Job Definition
  - name: Message
  - name: Metrics
  - name: Migration
  - name: Modification
  - name: Process Definition
  - name: Process Instance
  - name: Signal
  - name: Schema Log
  - name: Task
  - name: Task Attachment
  - name: Task Comment
  - name: Task Identity Link
  - name: Task Local Variable
  - name: Task Variable
  - name: Telemetry
  - name: Tenant
  - name: User
  - name: Variable Instance
  - name: Version
externalDocs:
  description: Find out more about ORION Rest API
  url: https://docs.eorion.com
paths:
  /process-instance/{id}/variables/{varName}/data:
    get:
      tags:
        - Process Instance
      summary: Get Process Variable (Binary)
      description: >-
        Retrieves the content of a Process Variable by the Process Instance id
        and the Process Variable name.

        Applicable for byte array or file Process Variables.
      operationId: getProcessInstanceVariableBinary
      parameters:
        - name: id
          in: path
          schema:
            type: string
          required: true
          description: The id of the process instance to retrieve the variable for.
        - name: varName
          in: path
          schema:
            type: string
          required: true
          description: The name of the variable to retrieve.
      responses:
        '200':
          description: |-
            Request successful.
                    For binary variables or files without any MIME type information, a byte stream is returned.
                    File variables with MIME type information are returned as the saved type.
                    Additionally, for file variables the Content-Disposition header will be set.
          content:
            application/octet-stream:
              schema:
                type: string
                format: binary
                description: >-
                  For binary variables or files without any MIME type
                  information, a byte stream is returned.
              examples:
                example-1:
                  summary: 'binary variable: Status 200'
                  value: 'Content-Type: application/octet-stream'
            text/plain:
              schema:
                type: string
                format: binary
                description: >-
                  File variables with MIME type information are returned as the
                  saved type.
                              Additionally, for file variables the Content-Disposition header will be set.
              examples:
                example-1:
                  summary: 'file variable: Status 200'
                  value: >-
                    Content-Type: text/plain; charset=UTF-8.
                    Content-Disposition: attachment; filename="someFile.txt"
        '400':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ExceptionDto'
          description: >-
            Bad Request

            A Process Variable with the given id exists but does not serialize
            as binary data.
        '404':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ExceptionDto'
          description: |-
            Not Found
            A Process Variable with the given id does not exist. 
components:
  schemas:
    ExceptionDto:
      title: ExceptionDto
      type: object
      properties:
        type:
          type: string
          nullable: true
          description: An exception class indicating the occurred error.
        message:
          type: string
          nullable: true
          description: A detailed message of the error.
        code:
          type: number
          description: >-
            The code allows your client application to identify the error in an
            automated fashion.

            You can look up the meaning of all built-in codes and learn how to
            add custom codes

            in the [User
            Guide](https://docs.camunda.org/manual/7.22/user-guide/process-engine/error-handling/#exception-codes).
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic

````