支持多格式的AI驱动文档聊天机器人
高级
这是一个Internal Wiki, Multimodal AI领域的自动化工作流，包含 32 个节点。主要使用 Code, Switch, SplitOut, Aggregate, FormTrigger 等节点。 使用OpenAI和Gemini的多格式文档RAG聊天机器人
前置要求
- •OpenAI API Key
使用的节点 (32)
工作流预览
可视化展示节点连接关系，支持缩放和平移
导出工作流
复制以下 JSON 配置到 n8n 导入，即可使用此工作流
{
"id": "X4QbiS3pD73ir3MT",
"meta": {
"instanceId": "7578372eeadee5ee5414cdf5a06141eebec63e21f295454563ddce7b1217363f",
"templateCredsSetupCompleted": true
},
"name": "支持多格式的 AI 驱动文档聊天机器人",
"tags": [],
"nodes": [
{
"id": "4b64d145-a52f-4a76-a1fb-e2a41f30a8f4",
"name": "AI 代理",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
464,
1424
],
"parameters": {
"text": "={{ $json.extractedFile?.length && $json.extractedFile.filter((f) => Object.keys(f)?.length > 0).length > 0 ? \"List of File content(s): \\n \" + JSON.stringify($json.extractedFile.filter((f) => Object.keys(f)?.length > 0)) : '' }}\n\n{{ $('When chat message received').item.json.chatInput }}",
"options": {
"systemMessage": "You are a helpful assistant answering users questions. Users can also upload files & images and ask questions.\n\nYour goal is to politely answer user questions and making sure to consider files and images provided before answering.",
"passthroughBinaryImages": true
},
"promptType": "define"
},
"typeVersion": 1.7
},
{
"id": "0f0bf785-8480-49ea-9386-07cec2323ba2",
"name": "转换为文件",
"type": "n8n-nodes-base.convertToFile",
"position": [
0,
0
],
"parameters": {
"options": {
"fileName": "={{ $json.fileName }}",
"mimeType": "={{ $json.mimeType }}"
},
"operation": "toBinary",
"sourceProperty": "data"
},
"typeVersion": 1.1
},
{
"id": "a4611591-3a05-4667-8d0f-b5ab37614051",
"name": "OpenAI 聊天模型",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
432,
1584
],
"parameters": {
"options": {}
},
"credentials": {
"openAiApi": {
"id": "1GGSImMA8fYgDteD",
"name": "OpenAi API Key"
}
},
"typeVersion": 1.1
},
{
"id": "b1b3ed85-7425-47f2-a152-ae261026c9f6",
"name": "切换",
"type": "n8n-nodes-base.switch",
"position": [
-304,
720
],
"parameters": {
"rules": {
"values": [
{
"outputKey": "Image",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": false,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "b3784277-1746-477a-b78e-2ca303df8423",
"operator": {
"type": "string",
"operation": "startsWith"
},
"leftValue": "={{ $json.mimeType }}",
"rightValue": "image/"
}
]
},
"renameOutput": true
},
{
"outputKey": "Plain Text",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": false,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "58cd09cb-2657-41b0-86c1-7c9b8f499e90",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.mimeType }}",
"rightValue": "text/plain"
}
]
},
"renameOutput": true
},
{
"outputKey": "PDF",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": false,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "1e0475d6-3c04-42d1-a758-b1a79ade7962",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.mimeType }}",
"rightValue": "application/pdf"
}
]
},
"renameOutput": true
},
{
"outputKey": "CSV",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": false,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "e5d9cde7-d9ff-4a2d-ba99-69b4e3b73521",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.mimeType }}",
"rightValue": "text/csv"
}
]
},
"renameOutput": true
},
{
"outputKey": "JSON",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": false,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "7ab50ace-fa94-4b7d-a255-2804994c454a",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.mimeType }}",
"rightValue": "application/json"
}
]
},
"renameOutput": true
},
{
"outputKey": "XML",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": false,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "b62c9ad6-b076-4e6c-83d1-092770fef004",
"operator": {
"type": "string",
"operation": "regex"
},
"leftValue": "={{ $json.mimeType }}",
"rightValue": "^(application|text)/xml$"
}
]
},
"renameOutput": true
},
{
"outputKey": "XLS, XLSX",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": false,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "ce3cce8a-f092-449f-8d56-931fb2bccced",
"operator": {
"type": "string",
"operation": "regex"
},
"leftValue": "={{ $json.mimeType }}",
"rightValue": "/^(application\\/vnd\\.ms-excel|application\\/vnd\\.openxmlformats-officedocument\\.spreadsheetml\\.sheet)$/"
}
]
},
"renameOutput": true
},
{
"outputKey": "RTF",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": false,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "78650dec-861f-4fcb-83a1-a9d80b61628f",
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.mimeType }}",
"rightValue": "application/rtf"
}
]
},
"renameOutput": true
}
]
},
"options": {
"ignoreCase": true,
"fallbackOutput": "extra"
}
},
"typeVersion": 3.2
},
{
"id": "91a256ff-91be-4149-8edb-251f282f9c30",
"name": "转换为文件1",
"type": "n8n-nodes-base.convertToFile",
"position": [
0,
160
],
"parameters": {
"options": {
"fileName": "={{ $json.fileName }}",
"mimeType": "={{ $json.mimeType }}"
},
"operation": "toBinary",
"sourceProperty": "data",
"binaryPropertyName": "base64DataBinary"
},
"typeVersion": 1.1
},
{
"id": "39db2c87-d878-47cc-b99e-7af603e2ae51",
"name": "从文件提取",
"type": "n8n-nodes-base.extractFromFile",
"position": [
160,
160
],
"parameters": {
"options": {
"encoding": "utf8"
},
"operation": "text",
"binaryPropertyName": "base64DataBinary"
},
"typeVersion": 1,
"alwaysOutputData": false
},
{
"id": "dbc6e27d-07ca-4158-9136-85730c3d7cbe",
"name": "转换为文件2",
"type": "n8n-nodes-base.convertToFile",
"position": [
0,
320
],
"parameters": {
"options": {
"fileName": "={{ $json.fileName }}",
"mimeType": "={{ $json.mimeType }}"
},
"operation": "toBinary",
"sourceProperty": "data",
"binaryPropertyName": "base64DataBinary"
},
"typeVersion": 1.1
},
{
"id": "685c2ef1-4087-495d-9d09-5b5f64fc1c48",
"name": "转换为文件3",
"type": "n8n-nodes-base.convertToFile",
"position": [
0,
480
],
"parameters": {
"options": {
"fileName": "={{ $json.fileName }}",
"mimeType": "={{ $json.mimeType }}"
},
"operation": "toBinary",
"sourceProperty": "data",
"binaryPropertyName": "base64DataBinary"
},
"typeVersion": 1.1
},
{
"id": "a435afa8-6953-4dee-81ac-ca2fdaea4ef1",
"name": "转换为文件4",
"type": "n8n-nodes-base.convertToFile",
"position": [
0,
640
],
"parameters": {
"options": {
"fileName": "={{ $json.fileName }}",
"mimeType": "={{ $json.mimeType }}"
},
"operation": "toBinary",
"sourceProperty": "data",
"binaryPropertyName": "base64DataBinary"
},
"typeVersion": 1.1
},
{
"id": "3bb0003b-cf94-4171-b89d-f2e0083e6b1c",
"name": "转换为文件5",
"type": "n8n-nodes-base.convertToFile",
"position": [
0,
800
],
"parameters": {
"options": {
"fileName": "={{ $json.fileName }}",
"mimeType": "={{ $json.mimeType }}"
},
"operation": "toBinary",
"sourceProperty": "data",
"binaryPropertyName": "base64DataBinary"
},
"typeVersion": 1.1
},
{
"id": "c22c22ec-2dac-42d7-ac14-1c6f2cf27567",
"name": "转换为文件7",
"type": "n8n-nodes-base.convertToFile",
"position": [
0,
992
],
"parameters": {
"options": {
"fileName": "={{ $json.fileName }}",
"mimeType": "={{ $json.mimeType }}"
},
"operation": "toBinary",
"sourceProperty": "data",
"binaryPropertyName": "base64DataBinary"
},
"typeVersion": 1.1
},
{
"id": "bc951e8c-e49e-4889-b277-48c004c37451",
"name": "转换为文件8",
"type": "n8n-nodes-base.convertToFile",
"position": [
0,
1152
],
"parameters": {
"options": {
"fileName": "={{ $json.fileName }}",
"mimeType": "={{ $json.mimeType }}"
},
"operation": "toBinary",
"sourceProperty": "data",
"binaryPropertyName": "base64DataUrlBinary"
},
"typeVersion": 1.1
},
{
"id": "b996efe9-1e76-4076-a73c-b86421e26df6",
"name": "从文件2中提取",
"type": "n8n-nodes-base.extractFromFile",
"position": [
160,
480
],
"parameters": {
"options": {},
"binaryPropertyName": "base64DataBinary"
},
"typeVersion": 1
},
{
"id": "96974714-dc18-4349-97c6-4169c6a76a47",
"name": "从文件3提取",
"type": "n8n-nodes-base.extractFromFile",
"position": [
160,
640
],
"parameters": {
"options": {},
"operation": "fromJson",
"binaryPropertyName": "base64DataBinary"
},
"typeVersion": 1
},
{
"id": "a4eed2ed-14f4-454f-9702-94635d4c3737",
"name": "从文件4提取",
"type": "n8n-nodes-base.extractFromFile",
"position": [
160,
800
],
"parameters": {
"options": {},
"operation": "xml",
"binaryPropertyName": "base64DataBinary"
},
"typeVersion": 1
},
{
"id": "918f3b71-3790-44b1-ad42-33a26df0b59a",
"name": "从文件6提取",
"type": "n8n-nodes-base.extractFromFile",
"position": [
160,
992
],
"parameters": {
"options": {},
"operation": "xlsx",
"binaryPropertyName": "base64DataBinary"
},
"typeVersion": 1
},
{
"id": "76db6129-0da5-42e3-857d-338639171434",
"name": "从文件7提取",
"type": "n8n-nodes-base.extractFromFile",
"position": [
160,
1152
],
"parameters": {
"options": {},
"operation": "rtf",
"binaryPropertyName": "base64DataUrlBinary"
},
"typeVersion": 1
},
{
"id": "11f1ed7f-8c15-4a65-a03d-48eaffb5dc91",
"name": "从文件1提取",
"type": "n8n-nodes-base.extractFromFile",
"position": [
160,
320
],
"parameters": {
"options": {},
"operation": "pdf",
"binaryPropertyName": "base64DataBinary"
},
"typeVersion": 1
},
{
"id": "68734362-d41e-420d-b449-a087a5e3724c",
"name": "遍历项目",
"type": "n8n-nodes-base.splitInBatches",
"position": [
-608,
1008
],
"parameters": {
"options": {
"reset": false
}
},
"typeVersion": 3
},
{
"id": "1bd5b8bd-ad12-46d7-8695-22ce31b3c434",
"name": "Aggregate",
"type": "n8n-nodes-base.aggregate",
"position": [
-336,
1424
],
"parameters": {
"options": {
"includeBinaries": true
},
"aggregate": "aggregateAllItemData",
"destinationFieldName": "extractedFile"
},
"typeVersion": 1
},
{
"id": "0cd6e851-af9b-4b5b-a4b0-1d720e686379",
"name": "窗口缓冲内存",
"type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
"position": [
544,
1600
],
"parameters": {
"sessionKey": "={{ $('When chat message received').item.json.sessionId }}",
"sessionIdType": "customKey",
"contextWindowLength": 200
},
"typeVersion": 1.3
},
{
"id": "ae15cf54-98f1-4960-aaf4-6680c5260d4e",
"name": "拆分输出",
"type": "n8n-nodes-base.splitOut",
"position": [
-816,
1008
],
"parameters": {
"options": {
"includeBinary": true
},
"fieldToSplitOut": "files"
},
"typeVersion": 1,
"alwaysOutputData": true
},
{
"id": "3fb13d6a-3db8-4e51-9af3-bfefde121ed1",
"name": "当收到聊天消息时",
"type": "@n8n/n8n-nodes-langchain.chatTrigger",
"position": [
-1344,
1008
],
"webhookId": "1b3a54c0-ca1e-42bc-8556-8ef16bc85f2c",
"parameters": {
"public": true,
"options": {
"title": "Discutez avec vos fichiers ",
"allowedOrigins": "*",
"allowFileUploads": true,
"inputPlaceholder": "Entrez votre question...",
"loadPreviousSession": "memory",
"allowedFilesMimeTypes": "*"
},
"initialMessages": ""
},
"typeVersion": 1.1
},
{
"id": "e1ac8f09-d8ec-4ed6-9cd2-3ef816020620",
"name": "代码",
"type": "n8n-nodes-base.code",
"position": [
-1024,
1008
],
"parameters": {
"jsCode": "const files = $input.all().at(0)?.binary\nconst isfilesSent = typeof files === 'object' && Object.keys(files)?.length\n\nif(isfilesSent){\n return { files }\n}\n\nreturn $input.all()"
},
"typeVersion": 2
},
{
"id": "f3845539-5520-468f-9707-b0bda4c57f41",
"name": "简单向量存储",
"type": "@n8n/n8n-nodes-langchain.vectorStoreInMemory",
"position": [
1072,
1168
],
"parameters": {
"mode": "insert",
"memoryKey": {
"__rl": true,
"mode": "list",
"value": "vector_store_key"
}
},
"typeVersion": 1.3
},
{
"id": "511e0c19-a3cb-4d88-99e2-b47e16376007",
"name": "嵌入 Google Gemini",
"type": "@n8n/n8n-nodes-langchain.embeddingsGoogleGemini",
"position": [
1008,
1376
],
"parameters": {},
"credentials": {
"googlePalmApi": {
"id": "89mVPG21GxPFECbN",
"name": "Google Gemini(PaLM) Api account"
}
},
"typeVersion": 1
},
{
"id": "ccaef8c7-2054-44b2-bd25-28801c1da718",
"name": "默认数据加载器",
"type": "@n8n/n8n-nodes-langchain.documentDefaultDataLoader",
"position": [
1216,
1376
],
"parameters": {
"options": {},
"textSplittingMode": "custom"
},
"typeVersion": 1.1
},
{
"id": "bca658ba-9dc3-422c-a52d-6cb5df63697c",
"name": "递归字符文本分割器",
"type": "@n8n/n8n-nodes-langchain.textSplitterRecursiveCharacterTextSplitter",
"position": [
1312,
1584
],
"parameters": {
"options": {},
"chunkOverlap": 50
},
"typeVersion": 1
},
{
"id": "01044dec-f614-438e-a619-6054d1cee9af",
"name": "表单提交时",
"type": "n8n-nodes-base.formTrigger",
"position": [
800,
1168
],
"webhookId": "a4ffa561-2829-4c82-b3aa-3b71190a45b9",
"parameters": {
"options": {},
"formTitle": "File",
"formFields": {
"values": [
{
"fieldType": "file",
"fieldLabel": "Add File",
"acceptFileTypes": "pdf"
}
]
}
},
"typeVersion": 2.2
},
{
"id": "b6fce3c0-7bde-4728-b10f-6137f0c06c56",
"name": "查询数据工具1",
"type": "@n8n/n8n-nodes-langchain.vectorStoreInMemory",
"position": [
688,
1664
],
"parameters": {
"mode": "retrieve-as-tool",
"topK": 50,
"toolName": "knowledge_base",
"memoryKey": {
"__rl": true,
"mode": "list",
"value": "vector_store_key"
},
"toolDescription": "Use this knowledge base to answer questions from the user"
},
"typeVersion": 1.2
},
{
"id": "7d38210e-4641-427a-afc8-ea37e3f888ae",
"name": "嵌入 Google Gemini1",
"type": "@n8n/n8n-nodes-langchain.embeddingsGoogleGemini",
"position": [
784,
1872
],
"parameters": {},
"credentials": {
"googlePalmApi": {
"id": "89mVPG21GxPFECbN",
"name": "Google Gemini(PaLM) Api account"
}
},
"typeVersion": 1
},
{
"id": "e5115fac-f6eb-48a2-989e-c2b665cfa530",
"name": "简单记忆",
"type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
"position": [
-1344,
1200
],
"parameters": {
"contextWindowLength": 200
},
"typeVersion": 1.3
}
],
"active": true,
"pinData": {},
"settings": {
"executionOrder": "v1"
},
"versionId": "aaf4c91d-8a28-4756-8f0c-db83ad346963",
"connections": {
"Code": {
"main": [
[
{
"node": "Split Out",
"type": "main",
"index": 0
}
]
]
},
"Switch": {
"main": [
[
{
"node": "Convert to File",
"type": "main",
"index": 0
}
],
[
{
"node": "Convert to File1",
"type": "main",
"index": 0
}
],
[
{
"node": "Convert to File2",
"type": "main",
"index": 0
}
],
[
{
"node": "Convert to File3",
"type": "main",
"index": 0
}
],
[
{
"node": "Convert to File4",
"type": "main",
"index": 0
}
],
[
{
"node": "Convert to File5",
"type": "main",
"index": 0
}
],
[
{
"node": "Convert to File7",
"type": "main",
"index": 0
}
],
[
{
"node": "Convert to File8",
"type": "main",
"index": 0
}
],
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"Aggregate": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"Split Out": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"Simple Memory": {
"ai_memory": [
[]
]
},
"Convert to File": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"Loop Over Items": {
"main": [
[
{
"node": "Aggregate",
"type": "main",
"index": 0
}
],
[
{
"node": "Switch",
"type": "main",
"index": 0
}
]
]
},
"Convert to File1": {
"main": [
[
{
"node": "Extract from File",
"type": "main",
"index": 0
}
]
]
},
"Convert to File2": {
"main": [
[
{
"node": "Extract from File1",
"type": "main",
"index": 0
}
]
]
},
"Convert to File3": {
"main": [
[
{
"node": "Extract from File2",
"type": "main",
"index": 0
}
]
]
},
"Convert to File4": {
"main": [
[
{
"node": "Extract from File3",
"type": "main",
"index": 0
}
]
]
},
"Convert to File5": {
"main": [
[
{
"node": "Extract from File4",
"type": "main",
"index": 0
}
]
]
},
"Convert to File7": {
"main": [
[
{
"node": "Extract from File6",
"type": "main",
"index": 0
}
]
]
},
"Convert to File8": {
"main": [
[
{
"node": "Extract from File7",
"type": "main",
"index": 0
}
]
]
},
"Query Data Tool1": {
"ai_tool": [
[
{
"node": "AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"Extract from File": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Extract from File1": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"Extract from File2": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"Extract from File3": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"Extract from File4": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"Extract from File6": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"Extract from File7": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"On form submission": {
"main": [
[
{
"node": "Simple Vector Store",
"type": "main",
"index": 0
}
]
]
},
"Default Data Loader": {
"ai_document": [
[
{
"node": "Simple Vector Store",
"type": "ai_document",
"index": 0
}
]
]
},
"Window Buffer Memory": {
"ai_memory": [
[
{
"node": "AI Agent",
"type": "ai_memory",
"index": 0
}
]
]
},
"Embeddings Google Gemini": {
"ai_embedding": [
[
{
"node": "Simple Vector Store",
"type": "ai_embedding",
"index": 0
}
]
]
},
"Embeddings Google Gemini1": {
"ai_embedding": [
[
{
"node": "Query Data Tool1",
"type": "ai_embedding",
"index": 0
}
]
]
},
"When chat message received": {
"main": [
[
{
"node": "Code",
"type": "main",
"index": 0
}
]
]
},
"Recursive Character Text Splitter": {
"ai_textSplitter": [
[
{
"node": "Default Data Loader",
"type": "ai_textSplitter",
"index": 0
}
]
]
}
}
}常见问题
如何使用这个工作流？
复制上方的 JSON 配置代码，在您的 n8n 实例中创建新工作流并选择「从 JSON 导入」，粘贴配置后根据需要修改凭证设置即可。
这个工作流适合什么场景？
高级 - 内部知识库, 多模态 AI
需要付费吗？
本工作流完全免费，您可以直接导入使用。但请注意，工作流中使用的第三方服务（如 OpenAI API）可能需要您自行付费。
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