opcode/examples/image-processing/workflow.json at main · rendis/opcode · GitHub

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{
  "name": "image-processing",
  "description": "Verify a source image exists, hash it for tracking, copy to output, and upload metadata to a CDN.",
  "category": "media",
  "features": ["fs", "crypto", "http"],
  "input_schema": {
    "type": "object",
    "required": ["source_path", "output_path", "cdn_upload_url"],
    "properties": {
      "source_path": {
        "type": "string",
        "description": "File path to the source image"
      },
      "output_path": {
        "type": "string",
        "description": "File path to write the processed image"
      },
      "cdn_upload_url": {
        "type": "string",
        "description": "CDN upload API endpoint"
      },
      "max_width": {
        "type": "integer",
        "description": "Maximum width in pixels for resizing (default: 1200)"
      },
      "quality": {
        "type": "integer",
        "description": "Compression quality 1-100 (default: 85)"
      }
    }
  },
  "definition": {
    "timeout": "3m",
    "on_timeout": "fail",
    "steps": [
      {
        "id": "read-source",
        "type": "action",
        "action": "fs.stat",
        "params": {
          "path": "${{inputs.source_path}}"
        }
      },
      {
        "id": "hash-source",
        "type": "action",
        "action": "crypto.hash",
        "depends_on": ["read-source"],
        "params": {
          "algorithm": "sha256",
          "data": "${{steps.read-source.output.path}}"
        }
      },
      {
        "id": "copy-to-output",
        "type": "action",
        "action": "fs.copy",
        "depends_on": ["read-source"],
        "params": {
          "src": "${{inputs.source_path}}",
          "dst": "${{inputs.output_path}}"
        }
      },
      {
        "id": "upload-cdn",
        "type": "action",
        "action": "http.post",
        "depends_on": ["copy-to-output", "hash-source"],
        "params": {
          "url": "${{inputs.cdn_upload_url}}",
          "body": {
            "file_path": "${{inputs.output_path}}",
            "original_size": "${{steps.read-source.output.size}}",
            "source_hash": "${{steps.hash-source.output.hash}}",
            "source_path": "${{inputs.source_path}}"
          }
        },
        "timeout": "30s",
        "retry": {
          "max": 2,
          "backoff": "exponential",
          "delay": "2s"
        }
      }
    ]
  }
}