基于Redis和GPT-4的高效消息缓冲系统
高级
这是一个Engineering, AI领域的自动化工作流，包含 30 个节点。主要使用 If, Set, Code, Wait, Redis 等节点，结合人工智能技术实现智能自动化。 基于Redis和GPT-4的高效消息缓冲系统
前置要求
- •Redis 服务器连接信息
- •OpenAI API Key
使用的节点 (30)
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
{
"meta": {
"instanceId": "d1b9b74c805fea7fca1b903ee192d1d4090b516d3c254da86beb2f13b7c2ed2e",
"templateCredsSetupCompleted": true
},
"nodes": [
{
"id": "be902a85-fc31-442c-b308-a2350ec5aabb",
"name": "当点击\"测试工作流\"时",
"type": "n8n-nodes-base.manualTrigger",
"position": [
-760,
440
],
"parameters": {},
"typeVersion": 1
},
{
"id": "d229b686-9de4-4633-9dba-3e1fe71eedf1",
"name": "无操作，不执行任何操作1",
"type": "n8n-nodes-base.noOp",
"position": [
1820,
800
],
"parameters": {},
"typeVersion": 1
},
{
"id": "f583bc97-8da8-488e-ab04-5167dc7a7701",
"name": "信息提取器",
"type": "@n8n/n8n-nodes-langchain.informationExtractor",
"position": [
2420,
540
],
"parameters": {
"text": "={{ $json.buffer.reverse().toJsonString() }}",
"options": {
"systemPromptTemplate": "Eres un experto extrayendo información, tu objetivo es recolectar todos los mensajes. Procura no dejar duplicados. como resultado debes retornar un solo párrafo con todo los mensajes."
},
"schemaType": "fromJson",
"jsonSchemaExample": "{\n\t\"message\": \"all consolidated messages\"\n}"
},
"typeVersion": 1
},
{
"id": "5b719416-4886-4d38-9d00-30b6237db168",
"name": "OpenAI 聊天模型",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
2440,
760
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4.1-nano",
"cachedResultName": "gpt-4.1-nano"
},
"options": {}
},
"credentials": {
"openAiApi": {
"id": "IogsrRzOBSmZJS5C",
"name": "OpenAi account"
}
},
"typeVersion": 1.2
},
{
"id": "3d149fc0-caa7-4361-9bf9-33b6252b39eb",
"name": "获取等待秒数",
"type": "n8n-nodes-base.code",
"position": [
-260,
500
],
"parameters": {
"jsCode": "// Function: Compute waitSeconds\nconst wordCount = $json.message.split(' ').filter(w=>w).length;\nreturn [{ json: { \n context_id: $json.context_id,\n message: $json.message,\n waitSeconds: wordCount < 5 ? 45 : 30 \n}}];\n"
},
"typeVersion": 2
},
{
"id": "cc670735-d126-465f-b0a3-3a4c5e390fd7",
"name": "设置最后可见时间",
"type": "n8n-nodes-base.redis",
"position": [
280,
380
],
"parameters": {
"key": "=last_seen:{{ $json.context_id}}",
"ttl": "={{ $json.waitSeconds + 60 }}",
"value": "={{$now.toMillis()}}",
"expire": true,
"keyType": "string",
"operation": "set"
},
"credentials": {
"redis": {
"id": "zJtRI38KhsyVjUvP",
"name": "Redis account"
}
},
"typeVersion": 1,
"alwaysOutputData": true
},
{
"id": "20d97d1d-70d4-4c3c-aa12-b1aa31795240",
"name": "获取等待回复状态",
"type": "n8n-nodes-base.redis",
"position": [
180,
780
],
"parameters": {
"key": "=waiting_reply:{{$json.context_id}}",
"options": {},
"operation": "get",
"propertyName": "waiting_reply"
},
"credentials": {
"redis": {
"id": "zJtRI38KhsyVjUvP",
"name": "Redis account"
}
},
"typeVersion": 1
},
{
"id": "7a2fc681-692f-4f72-9fab-f3ada4bda54b",
"name": "修改输入",
"type": "n8n-nodes-base.set",
"position": [
340,
800
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "7ff99444-753d-4ef7-865c-7115761526b8",
"name": "waiting_reply",
"type": "string",
"value": "={{ $json.waiting_reply }}"
},
{
"id": "58ad6981-c35a-4dd6-b1cd-7c446b85e738",
"name": "context_id",
"type": "string",
"value": "={{$('When Executed by Another Workflow').item.json.context_id }}"
},
{
"id": "bd0535a2-be03-436b-8a2e-222c3e26fd04",
"name": "message",
"type": "string",
"value": "={{$('When Executed by Another Workflow').item.json.message }}"
},
{
"id": "2f583f32-f231-4407-b773-c08b38d464f0",
"name": "waitSeconds",
"type": "number",
"value": "={{ $('get wait seconds').item.json.waitSeconds }}"
}
]
},
"includeOtherFields": true
},
"typeVersion": 3.4
},
{
"id": "84213bef-32be-4cd9-8387-cd76aff5cb38",
"name": "等待回复？",
"type": "n8n-nodes-base.if",
"position": [
540,
800
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "8136ea21-d798-41fd-81ed-5c0e7fda73c5",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
},
"leftValue": "={{ $json.waiting_reply != null}}",
"rightValue": ""
}
]
}
},
"typeVersion": 2.2
},
{
"id": "a8472217-aa83-4247-9d7d-3a471e24478a",
"name": "当收到聊天消息时",
"type": "@n8n/n8n-nodes-langchain.chatTrigger",
"position": [
-740,
640
],
"webhookId": "85115343-bb86-4bb8-b7a8-c4efded80b3f",
"parameters": {
"options": {}
},
"typeVersion": 1.1
},
{
"id": "ba4c81ba-92e2-4bef-a9e2-6f8d4c0aa722",
"name": "设置等待回复状态",
"type": "n8n-nodes-base.redis",
"position": [
840,
720
],
"parameters": {
"key": "=waiting_reply:{{ $json.context_id }}",
"ttl": "={{ $json.waitSeconds }}",
"value": "true",
"expire": true,
"operation": "set"
},
"credentials": {
"redis": {
"id": "zJtRI38KhsyVjUvP",
"name": "Redis account"
}
},
"typeVersion": 1
},
{
"id": "0ce783b6-b76b-4a5d-96ae-11708b7532ba",
"name": "获取缓冲区",
"type": "n8n-nodes-base.redis",
"position": [
1820,
600
],
"parameters": {
"key": "=buffer_in:{{ $('get wait seconds').item.json.context_id }}",
"options": {},
"operation": "get",
"propertyName": "buffer"
},
"credentials": {
"redis": {
"id": "zJtRI38KhsyVjUvP",
"name": "Redis account"
}
},
"typeVersion": 1
},
{
"id": "21864061-1d1f-4528-a03f-1237e9c69a31",
"name": "删除输入缓冲区",
"type": "n8n-nodes-base.redis",
"position": [
2940,
680
],
"parameters": {
"key": "=buffer_in:{{$json.context_id}}",
"operation": "delete"
},
"credentials": {
"redis": {
"id": "zJtRI38KhsyVjUvP",
"name": "Redis account"
}
},
"typeVersion": 1
},
{
"id": "8828aa7b-6153-4677-84a8-3ef2f884792c",
"name": "删除等待回复状态",
"type": "n8n-nodes-base.redis",
"position": [
2940,
840
],
"parameters": {
"key": "=waiting_reply:{{$json.context_id}}",
"operation": "delete"
},
"credentials": {
"redis": {
"id": "zJtRI38KhsyVjUvP",
"name": "Redis account"
}
},
"typeVersion": 1
},
{
"id": "fc369067-7213-4d8c-b515-c34c4db997e4",
"name": "等待秒数",
"type": "n8n-nodes-base.wait",
"position": [
1020,
720
],
"webhookId": "c218d471-2f0f-4bd7-87d1-5431ac602211",
"parameters": {
"amount": "={{ $json.waitSeconds }} "
},
"typeVersion": 1.1
},
{
"id": "2daa2ab9-756a-4fdb-8573-b4570c58d6e5",
"name": "缓冲消息",
"type": "n8n-nodes-base.redis",
"position": [
-40,
440
],
"parameters": {
"list": "=buffer_in:{{$json.context_id}}",
"operation": "push",
"messageData": "={\"text\": \"{{ $json.message }}\", \"timestamp\": \"{{$now}}\"}"
},
"credentials": {
"redis": {
"id": "zJtRI38KhsyVjUvP",
"name": "Redis account"
}
},
"typeVersion": 1
},
{
"id": "4d5bc5f0-11ce-4f7f-b44b-0514a5ab5671",
"name": "设置缓冲区计数递增",
"type": "n8n-nodes-base.redis",
"position": [
280,
560
],
"parameters": {
"key": "=buffer_count:{{$json.context_id}}",
"expire": "={{$json.waitSeconds + 60}}",
"operation": "incr"
},
"credentials": {
"redis": {
"id": "zJtRI38KhsyVjUvP",
"name": "Redis account"
}
},
"typeVersion": 1,
"alwaysOutputData": true
},
{
"id": "dcaee1a8-ea32-4a9d-b32f-f0418644027c",
"name": "获取最后可见时间",
"type": "n8n-nodes-base.redis",
"position": [
1220,
720
],
"parameters": {
"key": "=last_seen:{{$json.context_id}}",
"options": {},
"operation": "get",
"propertyName": "last_seen"
},
"credentials": {
"redis": {
"id": "zJtRI38KhsyVjUvP",
"name": "Redis account"
}
},
"typeVersion": 1
},
{
"id": "908c4a4c-1c60-4e90-827a-064a0b4d6bfd",
"name": "获取缓冲区计数",
"type": "n8n-nodes-base.redis",
"position": [
1400,
720
],
"parameters": {
"key": "=buffer_count:{{ $('Mod input').item.json.context_id }}",
"options": {},
"operation": "get",
"propertyName": "count"
},
"credentials": {
"redis": {
"id": "zJtRI38KhsyVjUvP",
"name": "Redis account"
}
},
"typeVersion": 1
},
{
"id": "1ceb472b-3944-4d74-994b-867ade006e4e",
"name": "映射输出",
"type": "n8n-nodes-base.set",
"position": [
3140,
380
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "e8d80ab4-74a2-4c30-8500-8dddc5802eec",
"name": "message",
"type": "string",
"value": "={{ $json.output.message }}"
},
{
"id": "7e7fcee4-14b3-4393-b516-b07a53c018b3",
"name": "context_id",
"type": "string",
"value": "={{$('get wait seconds').item.json.context_id }}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "0be7e5eb-1972-4a95-b5bf-4e564fc4ef7c",
"name": "检查空闲状态 + 计数",
"type": "n8n-nodes-base.if",
"position": [
1580,
720
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "loose"
},
"combinator": "and",
"conditions": [
{
"id": "0f294c51-0629-4ae1-a009-68c2f5fd30b5",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
},
"leftValue": "={{$json.count != null && Number($json.count) >= 1}}",
"rightValue": ""
},
{
"id": "1626238d-fb00-4ce8-89df-a40a4f29f52a",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
},
"leftValue": "={{$('Get last_seen').item.json.last_seen != null}}",
"rightValue": ""
},
{
"id": "df819099-1f6e-4bee-a017-32b729c836a3",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
},
"leftValue": "={{($now.toMillis() - $('Get last_seen').item.json.last_seen) >= $('Mod input').item.json.waitSeconds * 1000}}",
"rightValue": ""
}
]
},
"looseTypeValidation": true
},
"typeVersion": 2.2
},
{
"id": "0c3bd62b-8cf6-4b34-8010-ebe819db9667",
"name": "删除等待回复状态1",
"type": "n8n-nodes-base.redis",
"position": [
2940,
1000
],
"parameters": {
"key": "=buffer_count:{{$json.context_id}}",
"operation": "delete"
},
"credentials": {
"redis": {
"id": "zJtRI38KhsyVjUvP",
"name": "Redis account"
}
},
"typeVersion": 1
},
{
"id": "bbf45966-833b-4f5f-ae11-0578614eb156",
"name": "无操作，不执行任何操作2",
"type": "n8n-nodes-base.noOp",
"position": [
720,
540
],
"parameters": {},
"typeVersion": 1
},
{
"id": "5683eebf-ba51-4a6b-a803-de6acf1b1ea8",
"name": "等待",
"type": "n8n-nodes-base.wait",
"position": [
2080,
880
],
"webhookId": "b8e2e214-f82b-49c2-96e2-91e093137857",
"parameters": {
"amount": "={{ Math.max(0, Math.ceil(( $('Mod input').item.json.waitSeconds * 1000 - ($now.toMillis() - $('Get last_seen').item.json.last_seen)) / 1000)) }}"
},
"typeVersion": 1.1
},
{
"id": "c0478f60-944e-4c85-bb9c-9abe0d4238c0",
"name": "当被另一个工作流执行时",
"type": "n8n-nodes-base.executeWorkflowTrigger",
"position": [
-480,
720
],
"parameters": {
"workflowInputs": {
"values": [
{
"name": "context_id"
},
{
"name": "message"
}
]
}
},
"typeVersion": 1.1
},
{
"id": "91a650b7-ddd4-4dbf-a300-523f72f0bdb5",
"name": "模拟输入数据",
"type": "n8n-nodes-base.set",
"position": [
-500,
500
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "0543fdb7-4a22-4530-bdb7-ae7064732fae",
"name": "context_id",
"type": "string",
"value": "={{ $json.sessionId1 || '1lap075ha12' }}"
},
{
"id": "bead5646-a689-4deb-8f4b-b22aa97b51ca",
"name": "message",
"type": "string",
"value": "={{ $json.chatInput || 'Chat 2'}}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "cb450e32-7e19-469c-9a5c-3d9da5bf1dfa",
"name": "无操作，不执行任何操作3",
"type": "n8n-nodes-base.noOp",
"position": [
3320,
840
],
"parameters": {},
"typeVersion": 1
},
{
"id": "b463e405-3355-48a2-a043-42941d7025c3",
"name": "便签",
"type": "n8n-nodes-base.stickyNote",
"position": [
2880,
660
],
"parameters": {
"color": 7,
"width": 700,
"height": 780,
"content": "* `waiting_reply:{{context_id}}`"
},
"typeVersion": 1
},
{
"id": "1b5397f8-aa7e-4b2b-afb9-5da97d99e049",
"name": "便签1",
"type": "n8n-nodes-base.stickyNote",
"position": [
-80,
60
],
"parameters": {
"color": 7,
"width": 920,
"height": 940,
"content": "* 如果为 null（无进行中的批次），则将其设置为 `true`，TTL 为 `waitSeconds`，以阻止并发触发。"
},
"typeVersion": 1
},
{
"id": "edc07500-ccad-4e72-adc1-1a63a3a06609",
"name": "便签2",
"type": "n8n-nodes-base.stickyNote",
"position": [
1180,
340
],
"parameters": {
"color": 7,
"width": 1200,
"height": 820,
"content": "* **假：** 退出（无操作），让等待节点/标志机制稍后重试。"
},
"typeVersion": 1
}
],
"pinData": {
"When Executed by Another Workflow": [
{
"message": "Mensaje del usuario despues de pasar por el workflow de n8n:\nTexto: ¡Hola! Quiero más información.;\nImagen: ;\nAudio: ;",
"context_id": "573058148988@s.whatsapp.net"
}
]
},
"connections": {
"Wait": {
"main": [
[
{
"node": "Check Inactivity + Count",
"type": "main",
"index": 0
}
]
]
},
"Map ouput": {
"main": [
[]
]
},
"Mod input": {
"main": [
[
{
"node": "waiting_reply?",
"type": "main",
"index": 0
}
]
]
},
"Get buffer": {
"main": [
[
{
"node": "Information Extractor",
"type": "main",
"index": 0
}
]
]
},
"WaitSeconds": {
"main": [
[
{
"node": "Get last_seen",
"type": "main",
"index": 0
}
]
]
},
"Get last_seen": {
"main": [
[
{
"node": "Get buffer_count",
"type": "main",
"index": 0
}
]
]
},
"Set last_seen": {
"main": [
[
{
"node": "No Operation, do nothing2",
"type": "main",
"index": 0
}
]
]
},
"waiting_reply?": {
"main": [
[
{
"node": "No Operation, do nothing2",
"type": "main",
"index": 0
}
],
[
{
"node": "Set waiting_reply",
"type": "main",
"index": 0
}
]
]
},
"Buffer messages": {
"main": [
[
{
"node": "Set buffer_count increment",
"type": "main",
"index": 0
},
{
"node": "Set last_seen",
"type": "main",
"index": 0
},
{
"node": "Get waiting_reply",
"type": "main",
"index": 0
}
]
]
},
"Mock input data": {
"main": [
[
{
"node": "get wait seconds",
"type": "main",
"index": 0
}
]
]
},
"Delete buffer_in": {
"main": [
[
{
"node": "No Operation, do nothing3",
"type": "main",
"index": 0
}
]
]
},
"Get buffer_count": {
"main": [
[
{
"node": "Check Inactivity + Count",
"type": "main",
"index": 0
}
]
]
},
"get wait seconds": {
"main": [
[
{
"node": "Buffer messages",
"type": "main",
"index": 0
}
]
]
},
"Get waiting_reply": {
"main": [
[
{
"node": "Mod input",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "Information Extractor",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Set waiting_reply": {
"main": [
[
{
"node": "WaitSeconds",
"type": "main",
"index": 0
}
]
]
},
"Delete waiting_reply": {
"main": [
[
{
"node": "No Operation, do nothing3",
"type": "main",
"index": 0
}
]
]
},
"Delete waiting_reply1": {
"main": [
[
{
"node": "No Operation, do nothing3",
"type": "main",
"index": 0
}
]
]
},
"Information Extractor": {
"main": [
[
{
"node": "Map ouput",
"type": "main",
"index": 0
},
{
"node": "Delete buffer_in",
"type": "main",
"index": 0
},
{
"node": "Delete waiting_reply",
"type": "main",
"index": 0
},
{
"node": "Delete waiting_reply1",
"type": "main",
"index": 0
}
]
]
},
"Check Inactivity + Count": {
"main": [
[
{
"node": "Get buffer",
"type": "main",
"index": 0
}
],
[
{
"node": "No Operation, do nothing1",
"type": "main",
"index": 0
}
]
]
},
"No Operation, do nothing1": {
"main": [
[
{
"node": "Wait",
"type": "main",
"index": 0
}
]
]
},
"Set buffer_count increment": {
"main": [
[
{
"node": "No Operation, do nothing2",
"type": "main",
"index": 0
}
]
]
},
"When chat message received": {
"main": [
[
{
"node": "Mock input data",
"type": "main",
"index": 0
}
]
]
},
"When Executed by Another Workflow": {
"main": [
[
{
"node": "get wait seconds",
"type": "main",
"index": 0
}
]
]
},
"When clicking ‘Test workflow’": {
"main": [
[
{
"node": "Mock input data",
"type": "main",
"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 - 工程, 人工智能
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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