Kyriakos Papadopoulos This workflow corresponds to n8n.io template #9316 — we link there as the canonical source.
This workflow follows the Chainllm → HTTP Request recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →
{
"id": "5qiiLNNCnMfa0ACi",
"name": "Auto-Summarize Blog Posts to Social Media with Gemma and Postiz",
"tags": [],
"nodes": [
{
"id": "4de18e8b-5e69-4635-8f9e-3c4b12ab82e9",
"name": "Postiz (Create Post)",
"type": "n8n-nodes-postiz.postiz",
"disabled": true,
"position": [
4656,
640
],
"parameters": {
"date": "2025-08-06T14:45:00",
"posts": {
"post": [
{
"value": {
"contentItem": [
{
"image": {
"imageItem": [
{
"id": "={{ $('Upload Image to Postiz').item.json.id }}",
"path": "={{ $('Upload Image to Postiz').item.json.path }}"
}
]
},
"content": "={{ $json.text ? $json.text : 'NO_TEXT' }} {{ $json.link ? $json.link : 'NO_LINK' }}"
}
]
},
"integrationId": "cmdt7mm7c0001uq6yoangez5f"
},
{
"value": {
"contentItem": [
{
"image": {
"imageItem": [
{
"id": "={{ $('Upload Image to Postiz').item.json.id }}",
"path": "={{ $('Upload Image to Postiz').item.json.path }}"
}
]
},
"content": "={{ $json.text ? $json.text : 'NO_TEXT' }} {{ $json.link ? $json.link : 'NO_LINK' }}"
}
]
},
"integrationId": "cmdrm2h2w0001mu75dqdghjh3"
},
{
"value": {
"contentItem": [
{
"image": {
"imageItem": [
{
"id": "={{ $('Upload Image to Postiz').item.json.id }}",
"path": "={{ $('Upload Image to Postiz').item.json.path }}"
}
]
},
"content": "={{ $json.text ? $json.text : 'NO_TEXT' }} {{ $json.link ? $json.link : 'NO_LINK' }}"
}
]
},
"integrationId": "cmdt8yk610001ql6kgzaipjy7"
},
{
"value": {
"contentItem": [
{
"image": {
"imageItem": [
{
"id": "={{ $('Upload Image to Postiz').item.json.id }}",
"path": "={{ $('Upload Image to Postiz').item.json.path }}"
}
]
},
"content": "={{ $json.text ? $json.text : 'NO_TEXT' }} {{ $json.link ? $json.link : 'NO_LINK' }}"
}
]
},
"settings": {
"setting": [
{
"key": "post_type",
"stringValue": "post"
},
{
"key": "collaborators",
"stringValue": "[]"
},
{
"key": "media_type",
"stringValue": "IMAGE"
},
{
"key": "shortLink",
"valueType": "boolean"
}
]
},
"integrationId": "cmdt88b790003uq6y4lyk97o0"
}
]
}
},
"executeOnce": false,
"notesInFlow": false,
"retryOnFail": false,
"typeVersion": 1,
"alwaysOutputData": false
},
{
"id": "6f8f2953-bb6d-46f0-8af7-16ffcbf8341f",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
96,
64
],
"parameters": {
"content": "Replace 'Blog's Name' and the URL with your own RSS feed details (e.g., your blog's RSS URL)."
},
"typeVersion": 1
},
{
"id": "3c46789a-12cc-4a29-ab28-68b5a963c8f2",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
448,
48
],
"parameters": {
"content": "This node fetches the RSS feed. Ensure the URL matches your blog\u2014update if needed for custom feeds."
},
"typeVersion": 1
},
{
"id": "dcbe57b4-3866-4053-9da1-874b2b7d6947",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
3472,
48
],
"parameters": {
"width": 256,
"content": "Customize the LLM prompt for your content niche (e.g., change tone, fallback summary, or hashtag style to fit your blog's theme)."
},
"typeVersion": 1
},
{
"id": "93f63cde-e055-42dd-90b4-d66637339258",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
3488,
384
],
"parameters": {
"content": "Select your preferred Ollama model (e.g., gemma3:12b or alternatives like LLaMA). Update credentials with your local Ollama API setup."
},
"typeVersion": 1
},
{
"id": "68bd2325-938e-42c5-88ef-46a8c556871f",
"name": "Sticky Note4",
"type": "n8n-nodes-base.stickyNote",
"position": [
3216,
48
],
"parameters": {
"content": "Adjust maxChars calculation, hashtag reserve (default 50 chars), or buffers if using different platforms/limits (e.g., increase for longer hashtags)."
},
"typeVersion": 1
},
{
"id": "b2e53420-7251-4a54-b744-b3c2b94aa4e4",
"name": "Sticky Note5",
"type": "n8n-nodes-base.stickyNote",
"position": [
4256,
48
],
"parameters": {
"content": "Update validation logic if your inputs vary (e.g., add checks for custom fields like text length, link format, or image presence)."
},
"typeVersion": 1
},
{
"id": "9387a000-5013-4a4f-8a6e-3a1de3808cb0",
"name": "Sticky Note6",
"type": "n8n-nodes-base.stickyNote",
"position": [
4544,
-160
],
"parameters": {
"width": 288,
"height": 368,
"content": "This node posts to social platforms via Postiz API\u2014crucial for the workflow!\n- Update URL if your Postiz instance differs (e.g., self-hosted endpoint).\n- Set authentication: Add your Postiz API credentials (no hardcoding keys!).\n- Customize jsonBody: Replace integration IDs (e.g., \"cmdt7mm7c0001uq6yoangez5f\" for Facebook) with your own from Postiz dashboard.\n- Adjust platform settings (e.g., \"__type\", \"post_type\") if adding/removing channels.\nTest with a sample post to verify."
},
"typeVersion": 1
},
{
"id": "9454c1b1-4780-44c8-b2fa-a8122fd3d145",
"name": "Sticky Note7",
"type": "n8n-nodes-base.stickyNote",
"position": [
4480,
448
],
"parameters": {
"width": 480,
"height": 400,
"content": "The \"Postiz (Create Post)\" node is deactivated due to a compatibility bug with Instagram's JSON payload in the Postiz-n8n integration (see GitHub issue https://github.com/gitroomhq/postiz-n8n/issues/7), which prevents reliable posting. Instead, the \"HTTP Request\" node directly calls the Postiz API for greater control and workaround flexibility. On one hand, this ensures stable posting across platforms; on the other, it requires manual JSON tweaks, potentially increasing setup complexity for users."
},
"typeVersion": 1
},
{
"id": "885a82ba-0ba1-47c9-99bf-44aeb21f7b78",
"name": "Split RSS Feed URLs into Items",
"type": "n8n-nodes-base.splitOut",
"position": [
384,
192
],
"parameters": {
"options": {},
"fieldToSplitOut": "[\"Blog's Name\"]"
},
"typeVersion": 1
},
{
"id": "eb7a97de-e95e-43f9-81f1-1559e000f7d8",
"name": "Fetch Latest RSS Feed Content",
"type": "n8n-nodes-base.rssFeedRead",
"position": [
576,
192
],
"parameters": {
"url": "https://blogsname.blogspot.com/feeds/posts/default",
"options": {}
},
"typeVersion": 1.1
},
{
"id": "c2c32dda-af3a-4988-bc6c-1a85ebfca720",
"name": "Normalize RSS Fields (Content & Link)",
"type": "n8n-nodes-base.set",
"position": [
3072,
176
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "00d04dc1-3f58-4027-8807-83d9e1f4fdae",
"name": "contentSnippet",
"type": "string",
"value": "={{ $json.contentSnippet }}"
},
{
"id": "1e12c8ec-8364-4523-a0c7-39e73bbed3f2",
"name": "link",
"type": "string",
"value": "={{ $json.link }}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "52af44a5-f28a-42c0-8db4-2738959329f3",
"name": "Select Latest RSS Item by Date",
"type": "n8n-nodes-base.code",
"position": [
1584,
176
],
"parameters": {
"jsCode": "const items = $input.all();\nif (items.length === 0) return items;\nconst latestItem = items.sort((a, b) => new Date(b.json.pubDate) - new Date(a.json.pubDate))[0];\nreturn [latestItem];"
},
"typeVersion": 2
},
{
"id": "5fc6a338-fb38-4164-a88c-f9567c699753",
"name": "Generate Summary and Hashtags with LLM",
"type": "@n8n/n8n-nodes-langchain.chainLlm",
"position": [
3488,
176
],
"parameters": {
"text": "={\n \"promptType\": \"define\",\n \"text\": \"[\\n {\\n \\\"role\\\": \\\"system\\\",\\n \\\"content\\\": \\\"You summarize texts strictly under {{ $json.maxChars }} characters in a warm, engaging tone, then append exactly 3 relevant hashtags (e.g., #Tag1 #Tag2 #Tag3), then the link. Truncate if needed. Never exceed the limit. If empty, use fallback summary and tags.\\\"\\n },\\n {\\n \\\"role\\\": \\\"user\\\",\\n \\\"content\\\": \\\"Summarize this in under {{ $json.maxChars }} characters (text only; hashtags and link separate): {{ $json.contentSnippet || 'Discover health and wellbeing tips on our blog!' }}\\\\n\\\\nEnd with: #Hashtag1 #Hashtag2 #Hashtag3 {{ $json.link }}\\\"\\n }\\n]\",\n \"batching\": {}\n}",
"batching": {},
"promptType": "define"
},
"typeVersion": 1.7
},
{
"id": "dc4bfbda-76b8-425f-86c3-4dede50c5b39",
"name": "Configure Local LLM Model (Ollama)",
"type": "@n8n/n8n-nodes-langchain.lmOllama",
"position": [
3696,
448
],
"parameters": {
"model": "gemma3:12b",
"options": {}
},
"typeVersion": 1
},
{
"id": "a1d1e83e-98dd-4fc6-9b81-90519022f2be",
"name": "Calculate Summary Character Limit",
"type": "n8n-nodes-base.code",
"position": [
3296,
176
],
"parameters": {
"jsCode": "return items.map(item => {\n const link = item.json.link;\n const hashtagReserve = 50;\n item.json.maxChars = 280 - link.length - 20 - hashtagReserve;\n item.json.link = link;\n return item;\n});"
},
"typeVersion": 2
},
{
"id": "a400eee2-73f8-42ac-9381-e82043505fda",
"name": "Set RSS Feed URLs",
"type": "n8n-nodes-base.set",
"position": [
160,
192
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "e880cd01-0cc9-46bc-b714-117260be234c",
"name": "Blog's Name",
"type": "string",
"value": "https://blogsname.blogspot.com/feeds/posts/default"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "3ece393b-8584-4f7e-8b4e-ebe59720dd40",
"name": "Read Last Posted Hash from File",
"type": "n8n-nodes-base.code",
"position": [
2016,
176
],
"parameters": {
"jsCode": "const fs = require('fs');\nconst lastPath = '/.n8n/rss_last_posted.txt';\n\nreturn items.map(item => {\n let lastPostedHash = '';\n try {\n if (fs.existsSync(lastPath)) {\n lastPostedHash = fs.readFileSync(lastPath, 'utf8').trim();\n }\n console.log(\"Read lastPostedHash:\", lastPostedHash);\n } catch (error) {\n console.error(\"Failed to read last posted hash:\", error.message);\n }\n item.json.lastPostedHash = lastPostedHash;\n return item;\n});"
},
"typeVersion": 2
},
{
"id": "f1caf122-f0cf-41c4-8869-b875c3d9207f",
"name": "Save Posted Hash to File",
"type": "n8n-nodes-base.code",
"position": [
4928,
176
],
"parameters": {
"jsCode": "const fs = require('fs');\nconst lastPath = '/.n8n/rss_last_posted.txt';\nconst tempPath = '/.n8n/rss_temp_url.txt';\n\nreturn items.map(item => {\n let linkHash = item.json.linkHash || '';\n \n // Fallback: Read from temp file if linkHash is missing\n if (!linkHash && fs.existsSync(tempPath)) {\n try {\n linkHash = fs.readFileSync(tempPath, 'utf8').trim();\n console.log(\"Read linkHash from temp file:\", linkHash);\n } catch (error) {\n console.error(\"Failed to read temp file:\", error.message);\n }\n }\n \n if (linkHash) {\n try {\n fs.writeFileSync(lastPath, linkHash, 'utf8');\n console.log(\"Saved linkHash to rss_last_posted.txt:\", linkHash);\n } catch (error) {\n console.error(\"Failed to save linkHash:\", error.message);\n }\n } else {\n console.log(\"No linkHash available to save.\");\n }\n \n return item;\n});"
},
"typeVersion": 2
},
{
"id": "deece16b-a7fe-4447-a8b0-a8ddd5eca30c",
"name": "Calculate Link Hash for Duplication Check",
"type": "n8n-nodes-base.code",
"position": [
1808,
176
],
"parameters": {
"jsCode": "function simpleHash(str) {\n let hash = 0;\n for (let i = 0; i < str.length; i++) {\n const char = str.charCodeAt(i);\n hash = ((hash << 5) - hash) + char;\n hash = hash & hash; // Convert to 32-bit integer\n }\n return hash.toString(16);\n}\n\nreturn items.map(item => {\n const link = item.json.link || '';\n const linkHash = simpleHash(link.trim()); // Trim to remove trailing spaces\n item.json.linkHash = linkHash;\n console.log(\"Calculated linkHash:\", linkHash);\n return item;\n});"
},
"typeVersion": 2
},
{
"id": "f8608124-757d-479b-ba94-b76c62a7c615",
"name": "Compare Hashes for Duplicate Check",
"type": "n8n-nodes-base.code",
"position": [
2240,
176
],
"parameters": {
"jsCode": "const fs = require('fs');\nconst logPath = '/.n8n/debug_log.txt'; // Path to the debug log file\nconst lastPath = '/.n8n/rss_last_posted.txt';\n\nreturn items.map(item => {\n const linkHash = item.json.linkHash || '';\n let lastPostedHash = '';\n try {\n if (fs.existsSync(lastPath)) {\n lastPostedHash = fs.readFileSync(lastPath, 'utf8').trim();\n console.log(\"Comparison - linkHash:\", linkHash, \"lastPostedHash:\", lastPostedHash, \"File Exists:\", fs.existsSync(lastPath));\n } else {\n console.log(\"Comparison - File does not exist:\", lastPath);\n }\n } catch (error) {\n console.error(\"Failed to read last posted hash:\", error.message);\n }\n const shouldProceed = linkHash !== lastPostedHash;\n item.json.shouldProceed = shouldProceed;\n console.log(\"Comparison - shouldProceed:\", shouldProceed, \"Execution ID:\", $execution.id);\n\n // Log to file\n try {\n const logData = {\n timestamp: new Date().toISOString(),\n linkHash,\n lastPostedHash,\n shouldProceed\n };\n fs.appendFileSync(logPath, JSON.stringify(logData) + '\\n');\n console.log(\"Logged to debug_log.txt\");\n } catch (error) {\n console.error(\"Failed to write to debug_log.txt:\", error.message);\n }\n\n return item;\n});"
},
"typeVersion": 2
},
{
"id": "4fab8e26-a350-46bc-b0ca-d37dbf77533b",
"name": "Conditional Check for New Post",
"type": "n8n-nodes-base.code",
"position": [
2640,
176
],
"parameters": {
"jsCode": "const fs = require('fs');\nconst lastPath = '/.n8n/rss_last_posted.txt';\n\nreturn items.map(item => {\n const linkHash = item.json.linkHash || '';\n let lastPostedHash = '';\n try {\n if (fs.existsSync(lastPath)) {\n lastPostedHash = fs.readFileSync(lastPath, 'utf8').trim();\n console.log(\"Flow Control - linkHash:\", linkHash, \"lastPostedHash:\", lastPostedHash, \"File Exists:\", fs.existsSync(lastPath));\n } else {\n console.log(\"Flow Control - File does not exist:\", lastPath);\n }\n } catch (error) {\n console.error(\"Failed to read last posted hash:\", error.message);\n }\n const shouldProceed = linkHash !== lastPostedHash;\n item.json.shouldProceed = shouldProceed;\n console.log(\"Flow Control - shouldProceed:\", shouldProceed, \"Execution ID:\", $execution.id);\n\n // Only return items if they should proceed\n if (shouldProceed) {\n return item;\n }\n return null; // Null items are filtered out by n8n\n}).filter(item => item !== null);"
},
"typeVersion": 2
},
{
"id": "52765cc4-2f2f-4b75-823b-2ebbcb265fd9",
"name": "Extract Image URL from Post HTML",
"type": "n8n-nodes-base.code",
"position": [
1728,
432
],
"parameters": {
"jsCode": "return items.map(item => {\n let fullImageUrl = null;\n if (item.json.body) {\n const imgMatch = item.json.body.match(/<img[^>]+(?:data-original-height=\"\\d+\"[^>]*|data-original-width=\"\\d+\"[^>]*)*src=[\"'](.*?)[\"']/i);\n if (imgMatch && imgMatch[1]) {\n fullImageUrl = imgMatch[1].replace(/=w\\d+-h\\d+/, ''); // Simplified regex for clarity\n }\n }\n item.json.imageUrl = fullImageUrl || null;\n console.log('Extracted full image URL:', item.json.imageUrl);\n return item;\n});"
},
"typeVersion": 2
},
{
"id": "332fdb2c-4553-4ddd-b796-be1d46c08233",
"name": "Fetch Blog Post HTML Content",
"type": "n8n-nodes-base.httpRequest",
"position": [
1536,
432
],
"parameters": {
"url": "={{ $json.link }}",
"options": {
"response": {
"response": {
"responseFormat": "text",
"outputPropertyName": "body"
}
}
}
},
"typeVersion": 4.2
},
{
"id": "c4240336-7dda-4683-9eb4-fc5ce4f715f4",
"name": "Download Post Image",
"type": "n8n-nodes-base.httpRequest",
"position": [
2080,
432
],
"parameters": {
"url": "={{ $json.imageUrl }}",
"options": {
"response": {
"response": {
"responseFormat": "file"
}
}
}
},
"typeVersion": 4.2
},
{
"id": "4ff2834b-76c7-4522-b234-fb2923f300d5",
"name": "Transform/Resize Image for Upload",
"type": "n8n-nodes-base.editImage",
"position": [
2288,
432
],
"parameters": {
"width": 1080,
"height": 1080,
"options": {
"format": "jpeg",
"fileName": "=blog-image-{{ $execution.id }}.jpeg"
},
"operation": "resize"
},
"typeVersion": 1,
"alwaysOutputData": false
},
{
"id": "2bcb9f51-b0f4-415a-8fa2-4bf3a6a9538b",
"name": "Upload Image to Postiz",
"type": "n8n-nodes-postiz.postiz",
"position": [
2480,
432
],
"parameters": {
"operation": "uploadFile",
"binaryProperty": "={{ $('Transform/Resize Image for Upload').item.binary }}"
},
"typeVersion": 1
},
{
"id": "61deda9e-4fa7-446f-86b3-b7edb84065a4",
"name": "Filter Latest Item for Image Processing",
"type": "n8n-nodes-base.code",
"position": [
1904,
432
],
"parameters": {
"jsCode": "return items\n .filter(item => item.json.imageUrl && item.json.imageUrl !== null) // Ensure valid URL\n .sort((a, b) => new Date(b.json.pubDate) - new Date(a.json.pubDate)) // Sort by pubDate descending\n .slice(0, 1); // Take the latest item"
},
"typeVersion": 2
},
{
"id": "d2501d1e-d607-4585-8fb2-708ea989c389",
"name": "Loop Over RSS Items for Processing",
"type": "n8n-nodes-base.splitInBatches",
"position": [
1184,
384
],
"parameters": {
"options": {}
},
"executeOnce": true,
"typeVersion": 3
},
{
"id": "38beb7d1-53ee-4a95-9d76-e5d7b0d3574d",
"name": "Merge Processed Data Streams",
"type": "n8n-nodes-base.merge",
"position": [
1120,
176
],
"parameters": {
"mode": "combine",
"options": {
"includeUnpaired": true
},
"combineBy": "combineByPosition"
},
"typeVersion": 3.2
},
{
"id": "79a42cb0-45bf-496a-bf4f-b78cb1cbd054",
"name": "Create and Post Content via Postiz API",
"type": "n8n-nodes-base.httpRequest",
"position": [
4640,
176
],
"parameters": {
"url": "https://postiz.selfhosteddomain.net/api/public/v1/posts",
"method": "POST",
"options": {},
"jsonBody": "={\n \"type\": \"now\",\n \"date\": \"{{ new Date().toISOString() }}\",\n \"shortLink\": false,\n \"tags\": [],\n \"posts\": [\n {\n \"integration\": { \"id\": \"cmdt7mm7c0001uq6yoangez5f\" },\n \"value\": [\n {\n \"content\": \"{{ $json.text || 'NO_TEXT' }} {{ $json.link || 'NO_LINK' }} {{ $json.hashtags && Array.isArray($json.hashtags) ? $json.hashtags.join(' ') : '' }}\",\n \"image\": [\n {\n \"id\": \"{{ $('Upload Image to Postiz').item.json.id || '' }}\",\n \"path\": \"{{ $('Upload Image to Postiz').item.json.path || '' }}\",\n \"alt\": null,\n \"thumbnail\": null,\n \"thumbnailTimestamp\": null\n }\n ]\n }\n ],\n \"settings\": {\"__type\": \"facebook\"}\n },\n {\n \"integration\": { \"id\": \"cmdrm2h2w0001mu75dqdghjh3\" },\n \"value\": [\n {\n \"content\": \"{{ $json.text || 'NO_TEXT' }} {{ $json.link || 'NO_LINK' }} {{ $json.hashtags && Array.isArray($json.hashtags) ? $json.hashtags.join(' ') : '' }}\",\n \"image\": [\n {\n \"id\": \"{{ $('Upload Image to Postiz').item.json.id || '' }}\",\n \"path\": \"{{ $('Upload Image to Postiz').item.json.path || '' }}\",\n \"alt\": null,\n \"thumbnail\": null,\n \"thumbnailTimestamp\": null\n }\n ]\n }\n ],\n \"settings\": {\"__type\": \"linkedin-page\"}\n },\n {\n \"integration\": { \"id\": \"cmdt8yk610001ql6kgzaipjy7\" },\n \"value\": [\n {\n \"content\": \"{{ $json.text || 'NO_TEXT' }} {{ $json.link || 'NO_LINK' }} {{ $json.hashtags && Array.isArray($json.hashtags) ? $json.hashtags.join(' ') : '' }}\",\n \"image\": [\n {\n \"id\": \"{{ $('Upload Image to Postiz').item.json.id || '' }}\",\n \"path\": \"{{ $('Upload Image to Postiz').item.json.path || '' }}\",\n \"alt\": null,\n \"thumbnail\": null,\n \"thumbnailTimestamp\": null\n }\n ]\n }\n ],\n \"settings\": {\"__type\": \"x\"}\n },\n {\n \"integration\": { \"id\": \"cmdt88b790003uq6y4lyk97o0\" },\n \"value\": [\n {\n \"content\": \"{{ $json.text || 'NO_TEXT' }} {{ $json.hashtags && Array.isArray($json.hashtags) ? $json.hashtags.join(' ') : '' }} {{ $json.link || 'NO_LINK' }}\",\n \"image\": [\n {\n \"id\": \"{{ $('Upload Image to Postiz').item.json.id || '' }}\",\n \"path\": \"{{ $('Upload Image to Postiz').item.json.path || '' }}\",\n \"alt\": null,\n \"thumbnail\": null,\n \"thumbnailTimestamp\": null\n }\n ]\n }\n ],\n \"settings\": {\n \"post_type\": \"post\",\n \"collaborators\": [],\n \"media_type\": \"IMAGE\",\n \"__type\": \"instagram\"\n }\n }\n ]\n}",
"sendBody": true,
"sendHeaders": true,
"specifyBody": "json",
"authentication": "predefinedCredentialType",
"headerParameters": {
"parameters": [
{
"name": "Content-Type",
"value": "application/json"
}
]
},
"nodeCredentialType": "postizApi"
},
"typeVersion": 4.2
},
{
"id": "f1b0f139-e790-44a7-9365-1263180d7d30",
"name": "Validate Inputs for Postiz API",
"type": "n8n-nodes-base.code",
"position": [
4320,
176
],
"parameters": {
"jsCode": "const item = $input.item.json;\nconst upload = $('Upload Image to Postiz').item.json;\nconsole.log('Input validation:', { text: item.text, link: item.link, imageId: upload.id, imagePath: upload.path });\nif (!item.text || !item.link || !upload.id || !upload.path) {\n throw new Error(`Invalid input: text=${item.text}, link=${item.link}, image.id=${upload.id}, image.path=${upload.path}`);\n}\nreturn $input.item;"
},
"typeVersion": 2
},
{
"id": "bcf94463-572b-4cbd-bf9d-506609e98221",
"name": "Schedule: Check RSS Every 10 Minutes",
"type": "n8n-nodes-base.scheduleTrigger",
"position": [
-64,
192
],
"parameters": {
"rule": {
"interval": [
{
"field": "minutes",
"minutesInterval": 10
}
]
}
},
"typeVersion": 1.2
},
{
"id": "6e33f728-63bf-4682-b490-729826927a35",
"name": "Process LLM Output for Postiz (Extract Text/Hashtags/Link)",
"type": "n8n-nodes-base.code",
"position": [
3904,
176
],
"parameters": {
"jsCode": "function simpleHash(str) {\n let hash = 0;\n for (let i = 0; i < str.length; i++) {\n const char = str.charCodeAt(i);\n hash = ((hash << 5) - hash) + char;\n hash = hash & hash;\n }\n return hash.toString(16);\n}\n\nreturn items.map(item => {\n const inputText = item.json.text || \"No summary available\";\n const maxChars = item.json.maxChars || 200;\n let text = inputText;\n let link = item.json.link || \"\";\n let hashtags = [];\n console.log(\"Input text:\", inputText);\n const parts = inputText.split(\" \").filter(part => part.trim());\n const lastPart = parts[parts.length - 1];\n if (lastPart && lastPart.includes(\"http\")) {\n link = lastPart;\n hashtags = parts.slice(-4, -1).filter(part => part.startsWith(\"#\"));\n text = parts.slice(0, -4).join(\" \");\n } else if (parts.length >= 4) { // Fallback if link not detected\n hashtags = parts.slice(-3).filter(part => part.startsWith(\"#\"));\n text = parts.slice(0, -3).join(\" \");\n }\n if (hashtags.length !== 3) {\n console.warn(`Expected 3 hashtags, got ${hashtags.length}. Using defaults if needed.`);\n hashtags = [\"#Wellbeing\", \"#Health\", \"#Inspiration\"]; // Fallback\n }\n text = text.replace(/\\n/g, \" \").replace(/\"/g, '\\\\\"').trim().slice(0, maxChars);\n const linkHash = simpleHash(link);\n console.log(\"Processed - text:\", text, \"hashtags:\", hashtags, \"link:\", link, \"length:\", (text + \" \" + hashtags.join(\" \") + \" \" + link).length);\n return {\n json: {\n text: text,\n hashtags: hashtags,\n link: link,\n linkHash: linkHash,\n title: item.json.title || text.slice(0, 100),\n imageId: item.json.id || null\n }\n };\n});"
},
"typeVersion": 2
},
{
"id": "1852bc12-4f1f-47bd-bdb7-4a12c8f47801",
"name": "Save Temporary Link Hash to File",
"type": "n8n-nodes-base.code",
"position": [
4112,
176
],
"parameters": {
"jsCode": "const fs = require('fs');\nconst tempPath = '/.n8n/rss_temp_url.txt';\n\nreturn items.map(item => {\n const linkHash = item.json.linkHash || '';\n if (linkHash) {\n try {\n fs.writeFileSync(tempPath, linkHash, 'utf8');\n console.log(\"Wrote temp URL hash:\", linkHash);\n } catch (error) {\n console.error(\"Failed to write temp URL hash:\", error.message);\n }\n }\n console.log(\"Before Postiz - item.json:\", JSON.stringify(item.json));\n return item;\n});"
},
"typeVersion": 2
}
],
"active": false,
"settings": {
"executionOrder": "v1"
},
"versionId": "26882586-1d0d-43bc-b4df-78f5e75504a1",
"connections": {
"Set RSS Feed URLs": {
"main": [
[
{
"node": "Split RSS Feed URLs into Items",
"type": "main",
"index": 0
}
]
]
},
"Download Post Image": {
"main": [
[
{
"node": "Transform/Resize Image for Upload",
"type": "main",
"index": 0
}
]
]
},
"Upload Image to Postiz": {
"main": [
[
{
"node": "Loop Over RSS Items for Processing",
"type": "main",
"index": 0
}
]
]
},
"Fetch Blog Post HTML Content": {
"main": [
[
{
"node": "Extract Image URL from Post HTML",
"type": "main",
"index": 0
}
]
]
},
"Merge Processed Data Streams": {
"main": [
[
{
"node": "Select Latest RSS Item by Date",
"type": "main",
"index": 0
}
]
]
},
"Fetch Latest RSS Feed Content": {
"main": [
[
{
"node": "Loop Over RSS Items for Processing",
"type": "main",
"index": 0
},
{
"node": "Merge Processed Data Streams",
"type": "main",
"index": 1
}
]
]
},
"Conditional Check for New Post": {
"main": [
[
{
"node": "Normalize RSS Fields (Content & Link)",
"type": "main",
"index": 0
}
]
]
},
"Select Latest RSS Item by Date": {
"main": [
[
{
"node": "Calculate Link Hash for Duplication Check",
"type": "main",
"index": 0
}
]
]
},
"Split RSS Feed URLs into Items": {
"main": [
[
{
"node": "Fetch Latest RSS Feed Content",
"type": "main",
"index": 0
}
]
]
},
"Validate Inputs for Postiz API": {
"main": [
[
{
"node": "Create and Post Content via Postiz API",
"type": "main",
"index": 0
}
]
]
},
"Read Last Posted Hash from File": {
"main": [
[
{
"node": "Compare Hashes for Duplicate Check",
"type": "main",
"index": 0
}
]
]
},
"Extract Image URL from Post HTML": {
"main": [
[
{
"node": "Filter Latest Item for Image Processing",
"type": "main",
"index": 0
}
]
]
},
"Save Temporary Link Hash to File": {
"main": [
[
{
"node": "Validate Inputs for Postiz API",
"type": "main",
"index": 0
}
]
]
},
"Calculate Summary Character Limit": {
"main": [
[
{
"node": "Generate Summary and Hashtags with LLM",
"type": "main",
"index": 0
}
]
]
},
"Transform/Resize Image for Upload": {
"main": [
[
{
"node": "Upload Image to Postiz",
"type": "main",
"index": 0
}
]
]
},
"Compare Hashes for Duplicate Check": {
"main": [
[
{
"node": "Conditional Check for New Post",
"type": "main",
"index": 0
}
]
]
},
"Configure Local LLM Model (Ollama)": {
"ai_languageModel": [
[
{
"node": "Generate Summary and Hashtags with LLM",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Loop Over RSS Items for Processing": {
"main": [
[
{
"node": "Merge Processed Data Streams",
"type": "main",
"index": 0
}
],
[
{
"node": "Fetch Blog Post HTML Content",
"type": "main",
"index": 0
}
]
]
},
"Schedule: Check RSS Every 10 Minutes": {
"main": [
[
{
"node": "Set RSS Feed URLs",
"type": "main",
"index": 0
}
]
]
},
"Normalize RSS Fields (Content & Link)": {
"main": [
[
{
"node": "Calculate Summary Character Limit",
"type": "main",
"index": 0
}
]
]
},
"Create and Post Content via Postiz API": {
"main": [
[
{
"node": "Save Posted Hash to File",
"type": "main",
"index": 0
}
]
]
},
"Generate Summary and Hashtags with LLM": {
"main": [
[
{
"node": "Process LLM Output for Postiz (Extract Text/Hashtags/Link)",
"type": "main",
"index": 0
}
]
]
},
"Filter Latest Item for Image Processing": {
"main": [
[
{
"node": "Download Post Image",
"type": "main",
"index": 0
}
]
]
},
"Calculate Link Hash for Duplication Check": {
"main": [
[
{
"node": "Read Last Posted Hash from File",
"type": "main",
"index": 0
}
]
]
},
"Process LLM Output for Postiz (Extract Text/Hashtags/Link)": {
"main": [
[
{
"node": "Save Temporary Link Hash to File",
"type": "main",
"index": 0
}
]
]
}
}
}
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About this workflow
This workflow automates fetching the latest post from a Blogspot RSS feed, summarizes it with an LLM (e.g., Gemma via Ollama), extracts and uploads an image, generates three relevant hashtags, and posts to Facebook, LinkedIn, X (Twitter), and Instagram via the Postiz API.
Source: https://n8n.io/workflows/9316/ — original creator credit. Request a take-down →
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