タイ政府書簡のMistral OCRによる抽出
上級
これはDocument Extraction, AI Summarization分野の自動化ワークフローで、29個のノードを含みます。主にIf, Set, Merge, Webhook, MistralAiなどのノードを使用。 必ずミストラル OCR を使用してタイ政府通信のコンテンツを抽出し、Google スプレッドシートに保存してください。
前提条件
- •HTTP Webhookエンドポイント（n8nが自動生成）
- •Google Drive API認証情報
- •ターゲットAPIの認証情報が必要な場合あり
- •Google Sheets API認証情報
- •OpenAI API Key
使用ノード (29)
ワークフロープレビュー
ノード接続関係を可視化、ズームとパンをサポート
ワークフローをエクスポート
以下のJSON設定をn8nにインポートして、このワークフローを使用できます
{
"id": "IwCDobE0PCV4O35E",
"meta": {
"instanceId": "2c12b0b552404dc07af67cd5f092afd21d18c808d4fdabdb04cb4b064195b6fb",
"templateCredsSetupCompleted": true
},
"name": "ThaiLetterWtihMistralOCR_ENG",
"tags": [],
"nodes": [
{
"id": "beb2e565-ce98-4068-9a78-b4a26b85bd80",
"name": "付箋",
"type": "n8n-nodes-base.stickyNote",
"position": [
-3888,
-32
],
"parameters": {
"width": 261,
"height": 608,
"content": "## LINE Bot Letter OCR Workflow\n\n**Features:**\n- Receive files from LINE and Google Drive\n- OCR using Mistral Document AI\n- Extract invoice information using OpenAI's Information Extractor\n- Automatically log data into Google Sheets\n\n\n**Required Environment Variables:**\n- LINE_CHANNEL_ACCESS_TOKEN\n- GDRIVE_INVOICE_FOLDER_ID \n- MISTRAL_API_KEY\n- GSHEET_ID\n\n\n**Required Credentials:**\n- googleDriveOAuth2Api\n- googleSheetsOAuth2Api"
},
"typeVersion": 1
},
{
"id": "30426fbd-4053-415d-b3b5-fc3dff0b1b82",
"name": "LINE Webhook",
"type": "n8n-nodes-base.webhook",
"position": [
-3568,
176
],
"webhookId": "bf82240d-06be-4f2a-94b0-85d76943a314",
"parameters": {
"path": "webhook-linebot-test",
"options": {},
"httpMethod": "POST"
},
"typeVersion": 2
},
{
"id": "9a8dbc27-67e0-44db-aa45-677ada852e1b",
"name": "付箋1",
"type": "n8n-nodes-base.stickyNote",
"position": [
-3616,
-32
],
"parameters": {
"color": 4,
"width": 200,
"height": 341,
"content": "### LINE Webhook\n\n**Receive data from LINE:**\n- Accepts POST request from LINE Messaging API\n- Extracts `messageId` for downloading file\n\n**Path:** `/line-invoice`\n**Method:** `POST`"
},
"typeVersion": 1
},
{
"id": "2a996f22-ad7f-4c4e-ae64-7e098e2dccda",
"name": "Lineファイルを取得",
"type": "n8n-nodes-base.httpRequest",
"position": [
-3296,
176
],
"parameters": {
"url": "=https://api-data.line.me/v2/bot/message/{{ $json.body.events[0].message.id }}/content",
"options": {
"response": {
"response": {
"responseFormat": "file"
}
}
},
"sendHeaders": true,
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"headerParameters": {
"parameters": [
{}
]
}
},
"credentials": {
"httpHeaderAuth": {
"id": "byY3kI23lMe4ewnM",
"name": "Header Auth account - Maid"
}
},
"typeVersion": 4.2
},
{
"id": "bead3404-66a3-4d15-98d3-ec1cf2eda7a7",
"name": "Lineデータを設定",
"type": "n8n-nodes-base.set",
"position": [
-3072,
176
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "42960a6d-c039-42f7-9658-22e56159b931",
"name": "source",
"type": "string",
"value": "line"
},
{
"id": "a17844e1-5328-42e6-b67f-d3c6886e1d95",
"name": " fileName",
"type": "string",
"value": "={{ $json.body.events[0].message.fileName }}"
},
{
"id": "983bf680-ee70-4c70-8aa9-811cd5b81a04",
"name": "fileId",
"type": "string",
"value": "={{ $('LINE Webhook').item.json.body.events[0].message.id }}"
}
]
},
"includeOtherFields": true
},
"typeVersion": 3.4,
"alwaysOutputData": false
},
{
"id": "399b0815-e925-46de-bc80-9befdbe48739",
"name": "付箋2",
"type": "n8n-nodes-base.stickyNote",
"position": [
-3408,
-32
],
"parameters": {
"color": 4,
"width": 567,
"height": 341,
"content": "### Download File from LINE\n\n**Process:**\n1. Check if message type is \"image\"\n2. Use `messageId` to download the file\n3. Set metadata fields: source, fileName, fileId\n4. Store `fileBinary` for OCR\n\n**LINE API:** \n`https://api-data.line.me/v2/bot/message/{messageId}/content`\n"
},
"typeVersion": 1
},
{
"id": "a066a27e-e10c-4bd4-8663-b9614682e991",
"name": "Googleドライブトリガー",
"type": "n8n-nodes-base.googleDriveTrigger",
"position": [
-3344,
336
],
"parameters": {
"event": "fileCreated",
"options": {},
"pollTimes": {
"item": [
{
"mode": "everyMinute"
}
]
},
"triggerOn": "specificFolder",
"folderToWatch": {
"__rl": true,
"mode": "id",
"value": "1hRyZcu2RZsRMvLjl2GKNALzxhgRl8ZKI"
}
},
"credentials": {
"googleDriveOAuth2Api": {
"id": "QVrgALkld7whKIgB",
"name": "Google Drive account - Peakwave"
}
},
"typeVersion": 1
},
{
"id": "f278bb26-dc66-4d55-a2c5-0065775f471b",
"name": "付箋3",
"type": "n8n-nodes-base.stickyNote",
"position": [
-3616,
320
],
"parameters": {
"color": 5,
"width": 776,
"height": 257,
"content": "\n### Google Drive Trigger\n\n**Monitor for new files:**\n- Watch a specific folder in Google Drive\n- Trigger the workflow when a new file is added\n- Supports PDF, JPG, JPEG formats\n\n**Folder ID:** `$env.GDRIVE_INVOICE_FOLDER_ID` \n**Event:** `fileCreated"
},
"typeVersion": 1
},
{
"id": "b85acdcb-66bb-4707-98ca-e91af2a614d2",
"name": "ファイルをダウンロード (ドライブ)",
"type": "n8n-nodes-base.googleDrive",
"position": [
-3136,
336
],
"parameters": {
"fileId": "={{ $json.id }}",
"options": {},
"operation": "download"
},
"credentials": {
"googleDriveOAuth2Api": {
"id": "QVrgALkld7whKIgB",
"name": "Google Drive account - Peakwave"
}
},
"typeVersion": 3
},
{
"id": "dac53614-da13-4147-992a-f0db91e7bc89",
"name": "データソースを統合",
"type": "n8n-nodes-base.merge",
"position": [
-2768,
256
],
"parameters": {
"mode": "combine",
"options": {},
"combinationMode": "mergeByPosition"
},
"typeVersion": 2.1,
"alwaysOutputData": true
},
{
"id": "fcecfcb9-deb2-489b-a36e-e71c779f0d29",
"name": "付箋4",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2832,
-32
],
"parameters": {
"width": 231,
"height": 609,
"content": "### Merge Data Sources\n\n**Combine data from both sources:**\n- LINE: source = \"line\", fileName, fileId, fileBinary\n- Drive: source = \"drive\", fileName, fileId, fileBinary\n\n**Output:** Unified data object for downstream processing \n**Mode:** `combineAll`\n"
},
"typeVersion": 1
},
{
"id": "2b36574f-9c6b-46da-8902-9efbc07667b3",
"name": "ファイルタイプを確認",
"type": "n8n-nodes-base.if",
"position": [
-2528,
176
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 1,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "or",
"conditions": [
{
"id": "condition1",
"operator": {
"type": "string",
"operation": "regex",
"singleValue": true
},
"leftValue": "={{ $binary.data.mimeType }}",
"rightValue": "^image/(jpg|jpeg|png)$"
}
]
}
},
"typeVersion": 2
},
{
"id": "f5c236db-a54d-4c15-bf40-e9166a552cfc",
"name": "付箋5",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2592,
-32
],
"parameters": {
"width": 231,
"height": 341,
"content": "### File Type Check\n\n**Determine file type:**\n- JPG, JPEG → OCR Image Processing\n- PDF → OCR Document Processing\n\n**Regex Pattern:** `.*\\.(jpg|jpeg|png)$`\n\n**True:** Continue to OCR via Mistral \n**False:** Fallback to extract info from filename"
},
"typeVersion": 1
},
{
"id": "c6948c15-9278-4c2b-9d6e-c832e43b75c8",
"name": "付箋6",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2352,
-32
],
"parameters": {
"width": 279,
"height": 341,
"content": "### Mistral OCR Image\n\n**OCR using AI:**\n\n**Steps:**\n1. Encode image file to Base64\n2. Send to Mistral OCR node\n3. Receive parsed text from the image"
},
"typeVersion": 1
},
{
"id": "1bfcad59-b68e-47ee-8796-71ee066cf8fa",
"name": "付箋7",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2592,
320
],
"parameters": {
"width": 519,
"height": 261,
"content": "### Mistral OCR Document\n\n**OCR using AI:**\n\n**Steps:**\n1. Encode PDF file to Base64\n2. Send to Mistral OCR node\n3. Receive parsed text from the document"
},
"typeVersion": 1
},
{
"id": "1700e1d6-b00a-4872-96b7-5f46f50cce94",
"name": "付箋8",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2064,
-32
],
"parameters": {
"width": 343,
"height": 341,
"content": "### AI Validation Agent\n\n**Extract and validate data using AI:**\n\n**Validation fields:**\n- book_id\n- subject\n- to\n- ..."
},
"typeVersion": 1
},
{
"id": "d1974977-c464-4b6f-8ad2-d3000b9ccde6",
"name": "Googleシートに書き込み",
"type": "n8n-nodes-base.googleSheets",
"position": [
-1520,
160
],
"parameters": {
"columns": {
"value": {
"to": "={{ $json.output.to }}",
"date": "={{ $json.output.date }}",
"attach": "={{ $json.output.attach }}",
"detail": "={{ $json.output.detail }}",
"book_id": "={{ $json.output.book_id }}",
"subject": "={{ $json.output.subject }}",
"signed_by": "={{ $json.output.signed_by }}",
"download_url": "={{ $json.output.download_url }}",
"contact_email": "={{ $json.output.contact_email }}",
"contact_phone": "={{ $json.output.contact_phone }}",
"signed_by_position": "={{ $json.output.signed_by_position }}"
},
"schema": [
{
"id": "book_id",
"type": "string",
"display": true,
"required": false,
"displayName": "book_id",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "date",
"type": "string",
"display": true,
"required": false,
"displayName": "date",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "subject",
"type": "string",
"display": true,
"required": false,
"displayName": "subject",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "to",
"type": "string",
"display": true,
"required": false,
"displayName": "to",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "attach",
"type": "string",
"display": true,
"required": false,
"displayName": "attach",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "detail",
"type": "string",
"display": true,
"required": false,
"displayName": "detail",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "signed_by",
"type": "string",
"display": true,
"required": false,
"displayName": "signed_by",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "signed_by_position",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "signed_by_position",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "contact_phone",
"type": "string",
"display": true,
"required": false,
"displayName": "contact_phone",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "contact_email",
"type": "string",
"display": true,
"required": false,
"displayName": "contact_email",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "download_url",
"type": "string",
"display": true,
"required": false,
"displayName": "download_url",
"defaultMatch": false,
"canBeUsedToMatch": true
}
],
"mappingMode": "defineBelow",
"matchingColumns": [],
"attemptToConvertTypes": false,
"convertFieldsToString": false
},
"options": {},
"operation": "append",
"sheetName": {
"__rl": true,
"mode": "list",
"value": "gid=0",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1asLDGXnPA4K55RfLDGRkgQzOpnKezDoVibWgnGaGUJ0/edit#gid=0",
"cachedResultName": "Sheet1"
},
"documentId": {
"__rl": true,
"mode": "list",
"value": "1asLDGXnPA4K55RfLDGRkgQzOpnKezDoVibWgnGaGUJ0",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1asLDGXnPA4K55RfLDGRkgQzOpnKezDoVibWgnGaGUJ0/edit?usp=drivesdk",
"cachedResultName": "n8n_ThaiLetterWithMistralAI"
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"id": "0RVWjnYzlWor2bMu",
"name": "Google Sheets account"
}
},
"typeVersion": 4.4
},
{
"id": "05d85bdd-c642-4a45-a2c9-ffcda27c4906",
"name": "付箋9",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1712,
-32
],
"parameters": {
"color": 2,
"width": 391,
"height": 341,
"content": "### Google Sheets Output\n\n**Append structured data to Google Sheets:**\n\n**Columns:**\n- book_id\n- subject\n- to\n...\n\n**Sheet:** `data` \n**Operation:** `append`\n"
},
"typeVersion": 1
},
{
"id": "c51e40ff-0aab-4c99-84e9-dbaa7ecb01bb",
"name": "LINEに返信",
"type": "n8n-nodes-base.httpRequest",
"position": [
-1456,
336
],
"parameters": {
"url": "https://api.line.me/v2/bot/message/reply",
"method": "POST",
"options": {
"response": {
"response": {
"neverError": true
}
}
},
"jsonBody": "={\n \"replyToken\": \"{{ $('LINE Webhook').item.json.body.events[0].replyToken }}\",\n \"messages\": [\n {\n \"type\": \"text\",\n \"text\": \"✅ บันทึกใบหนังสือเรียบร้อยแล้ว!\\n\\n📋 ข้อมูล:\\n เลขที่: {{ $json.book_id }}\\n เรื่อง: {{ $json.subject }}\\n เรียน: {{ $json.to }}\\n ลงวันที่: {{ $json.date }}\\n จาก: {{ $json.signed_by_position }}\\n\\n\"\n }\n ]\n}",
"sendBody": true,
"sendHeaders": true,
"specifyBody": "json",
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"headerParameters": {
"parameters": [
{
"name": "Content-Type",
"value": "application/json"
}
]
}
},
"credentials": {
"httpHeaderAuth": {
"id": "byY3kI23lMe4ewnM",
"name": "Header Auth account - Maid"
}
},
"typeVersion": 4.2
},
{
"id": "076fdad3-6c0b-4812-bdb5-8b13550da89c",
"name": "付箋10",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1712,
320
],
"parameters": {
"color": 4,
"width": 391,
"height": 133,
"content": "### LINE Reply\n\n**Send reply message to LINE user:**\n- Confirm invoice has been saved\n- Include extracted details"
},
"typeVersion": 1
},
{
"id": "1a14bc7a-a7ca-468c-a053-aed3a3a71cb2",
"name": "返信元を確認",
"type": "n8n-nodes-base.if",
"position": [
-2016,
448
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 1,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "condition1",
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $('Merge Data Sources').item.json.source }}",
"rightValue": "line"
}
]
}
},
"typeVersion": 2
},
{
"id": "54929d5d-2f74-4e71-a06b-47051baefca1",
"name": "情報抽出器",
"type": "@n8n/n8n-nodes-langchain.informationExtractor",
"position": [
-2032,
160
],
"parameters": {
"text": "={{ $json.pages[0].markdown }}",
"options": {
"systemPromptTemplate": "You are an expert extraction algorithm.\nOnly extract relevant information from the text.\nIf you do not know the value of an attribute asked to extract, you may omit the attribute's value.\nYou must format your output as raw JSON without any backticks or markdown formatting. Do not include ```json or similar wrappers.\n"
},
"attributes": {
"attributes": [
{
"name": "book_id",
"description": "book id เลขที่หนังสือ"
},
{
"name": "date",
"type": "date",
"description": "วันที่ date"
},
{
"name": "subject",
"description": "subject เรื่อง"
},
{
"name": "to",
"description": "ถึง เรียน to"
},
{
"name": "attach",
"description": "attach เอกสารแนบ หรือ อ้างถึง"
},
{
"name": "detail",
"description": "detail รายละเอียด เนื้อความ ในหนังสือ"
},
{
"name": "signed_by",
"description": "signed_by ลงนาม"
},
{
"name": "contact_phone",
"description": "contact_phone หมายเลขโทรศัพท์ติดต่อ"
},
{
"name": "contact_email",
"description": "contact_email อีเมล์สำหรับการติดต่อ"
},
{
"name": "download_url",
"description": "download_url QR code สำหรับแสกนไฟล์ที่เกี่ยวข้อง"
},
{
"name": "signed_by_position",
"description": "signed_by_position ตำแหน่งผู้ลงนาม ตำแหน่งผู้สั่งการ"
}
]
}
},
"typeVersion": 1.2
},
{
"id": "3d82e9cd-a982-4ad6-8a18-5fecdd3bbfd5",
"name": "OpenAIチャットモデル",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
-1808,
208
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini",
"cachedResultName": "gpt-4o-mini"
},
"options": {}
},
"credentials": {
"openAiApi": {
"id": "28LXl50ZdQjnkMJs",
"name": "OpenAi account"
}
},
"typeVersion": 1.2
},
{
"id": "efe1b305-288b-4ea9-a35b-0cd634e2e011",
"name": "ドライブデータを設定",
"type": "n8n-nodes-base.set",
"position": [
-2976,
336
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "42960a6d-c039-42f7-9658-22e56159b931",
"name": "source",
"type": "string",
"value": "GDrive"
},
{
"id": "a17844e1-5328-42e6-b67f-d3c6886e1d95",
"name": " fileName",
"type": "string",
"value": "=slip_{{\n $now.format('ddLLyyyyHHmm') }}.{{ $json.fileExtension }}"
},
{
"id": "983bf680-ee70-4c70-8aa9-811cd5b81a04",
"name": "fileId",
"type": "string",
"value": "={{ $json.permissions[1].id }}"
}
]
},
"includeOtherFields": true
},
"typeVersion": 3.4,
"alwaysOutputData": false
},
{
"id": "8067480c-7800-4da7-a195-8e972b01cb5e",
"name": "ファイルを移動",
"type": "n8n-nodes-base.googleDrive",
"position": [
-1456,
480
],
"parameters": {
"fileId": {
"__rl": true,
"mode": "id",
"value": "={{ $('Google Drive Trigger').item.json.id }}"
},
"driveId": {
"__rl": true,
"mode": "id",
"value": "1QRfuxVMkw2K_yavR3aPMSQPBnuu7xB2m"
},
"folderId": {
"__rl": true,
"mode": "list",
"value": "root",
"cachedResultName": "/ (Root folder)"
},
"operation": "move"
},
"credentials": {
"googleDriveOAuth2Api": {
"id": "QVrgALkld7whKIgB",
"name": "Google Drive account - Peakwave"
}
},
"typeVersion": 3
},
{
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}よくある質問
このワークフローの使い方は？
上記のJSON設定コードをコピーし、n8nインスタンスで新しいワークフローを作成して「JSONからインポート」を選択、設定を貼り付けて認証情報を必要に応じて変更してください。
このワークフローはどんな場面に適していますか？
上級 - 文書抽出, AI要約
有料ですか？
このワークフローは完全無料です。ただし、ワークフローで使用するサードパーティサービス（OpenAI APIなど）は別途料金が発生する場合があります。
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難易度
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ノード数29
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ノードタイプ12
作成者
Jaruphat J.
@jaruphatjProject Manager who passionate about Automation & AI and continuously explore innovative ways to improve business processes through intelligent workflow automation. Let’s connect and automate the future!
外部リンク
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