ParquetReaderを使用してParquet、Avro、ORC、FeatherをJSONに変換

• •HTTP Webhookエンドポイント（n8nが自動生成）
• •ターゲットAPIの認証情報が必要な場合あり

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      "name": "Convert",
      "createdAt": "2025-03-30T09:38:16.466Z",
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        "content": "### ✅ **How to Use This Flow**\n\n#### 📥 Trigger via File Upload\n\nYou can trigger this flow by sending a `POST` request with a file using **curl**, **Postman**, or **from another n8n flow**.\n\n#### 🔧 Example (via `curl`):\n```bash\ncurl -X POST http://localhost:5678/webhook-test/convert \\\n-F \"file=@converted.parquet\"\n```\n> Replace `converted.parquet` with your local file path. You can also send Avro, ORC or Feather files.\n\n#### 🔁 Reuse from Other Flows\nYou can **reuse this flow** by calling the webhook from another n8n workflow using an **HTTP Request** node.  \nMake sure to send the file as **form-data** with the field name `file`.\n\n#### 🔍 What This Flow Does:\n- Receives the uploaded file via webhook (`file`)\n- Sends it to `https://api.parquetreader.com/parquet` as `multipart/form-data` (field name: `file`)\n- Receives parsed data, schema, and metadata\n"
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      "parameters": {
        "jsCode": "const item = items[0];\n\n// Convert `data` (stringified JSON array) → actual array\nif (typeof item.json.data === 'string') {\n  item.json.data = JSON.parse(item.json.data);\n}\n\n// Convert `meta_data` (stringified JSON object) → actual object\nif (typeof item.json.meta_data === 'string') {\n  item.json.meta_data = JSON.parse(item.json.meta_data);\n}\n\nreturn [item];\n"
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