{ "id": "nixframe-upload", "name": "NixFrame Upload Handler", "nodes": [ { "id": "upload-webhook", "name": "Upload Webhook", "type": "n8n-nodes-base.webhook", "typeVersion": 2, "position": [ 100, 300 ], "parameters": { "path": "nixframe-upload", "httpMethod": "POST", "responseMode": "responseNode", "options": {} } }, { "id": "validate-and-save", "name": "Validate and Save", "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ 300, 300 ], "parameters": { "jsCode": "const fs = require('fs');\nconst path = require('path');\nconst crypto = require('crypto');\nconst { execFileSync } = require('child_process');\n\nconst PHOTO_DIR = '/var/lib/nixframe/photos';\nconst MAX_SIZE = 20 * 1024 * 1024; // 20MB\nconst ALLOWED_MIME = ['image/jpeg', 'image/png', 'image/webp', 'image/heic', 'image/heif'];\n\ntry {\n const body = $input.first().json.body || {};\n const imageData = body.imageData;\n\n if (!imageData || typeof imageData !== 'string') {\n return [{ json: { success: false, error: 'Missing imageData field' } }];\n }\n\n // Extract base64 data and MIME type\n let mimeType = 'image/jpeg';\n let base64Data = imageData;\n\n if (imageData.startsWith('data:')) {\n const match = imageData.match(/^data:(image\\/[^;]+);base64,(.+)$/);\n if (!match) {\n return [{ json: { success: false, error: 'Invalid data URL format' } }];\n }\n mimeType = match[1];\n base64Data = match[2];\n }\n\n // Validate MIME type\n if (!ALLOWED_MIME.includes(mimeType)) {\n return [{ json: { success: false, error: 'Unsupported format: ' + mimeType + '. Use JPG, PNG, WebP, or HEIC.' } }];\n }\n\n // Decode base64\n const buffer = Buffer.from(base64Data, 'base64');\n\n // Validate size\n if (buffer.length > MAX_SIZE) {\n return [{ json: { success: false, error: 'File too large (' + Math.round(buffer.length / 1024 / 1024) + 'MB). Max 20MB.' } }];\n }\n\n // Generate unique filename with timestamp\n const hash = crypto.createHash('sha256').update(buffer).digest('hex').substring(0, 8);\n const timestamp = new Date().toISOString().replace(/[:.]/g, '-').substring(0, 19);\n const tmpId = crypto.randomUUID();\n\n // Determine input extension for ImageMagick\n const isHeic = mimeType === 'image/heic' || mimeType === 'image/heif';\n const inputExt = isHeic ? '.heic' : (mimeType === 'image/png' ? '.png' : (mimeType === 'image/webp' ? '.webp' : '.jpg'));\n const outputExt = '.jpg'; // Always output JPEG for consistency\n\n // Write raw input to temp file\n const tmpInput = path.join(PHOTO_DIR, '.tmp-input-' + tmpId + inputExt);\n const tmpOutput = path.join(PHOTO_DIR, '.tmp-output-' + tmpId + outputExt);\n const finalName = timestamp + '_' + hash + outputExt;\n const finalPath = path.join(PHOTO_DIR, finalName);\n\n fs.writeFileSync(tmpInput, buffer);\n\n try {\n // Convert: auto-orient EXIF, strip metadata, convert HEIC\u2192JPEG\n // Uses execFileSync (no shell) to avoid command injection risks\n try {\n execFileSync('convert', [tmpInput, '-auto-orient', '-strip', tmpOutput], { timeout: 30000, stdio: ['pipe', 'pipe', 'pipe'] });\n } catch (convertErr) {\n const stderr = convertErr.stderr ? convertErr.stderr.toString() : '';\n if (convertErr.killed || convertErr.signal === 'SIGTERM') {\n return [{ json: { success: false, error: 'Image conversion timed out. Try uploading a smaller image or convert HEIC to JPEG first.' } }];\n }\n if (stderr.includes('no decode delegate') || stderr.includes('unable to open')) {\n return [{ json: { success: false, error: 'Could not process this image format. Try converting to JPEG before uploading.' } }];\n }\n return [{ json: { success: false, error: 'Image conversion failed: ' + (stderr.split('\\n')[0] || convertErr.message) } }];\n }\n\n // Atomic rename to final location (prevents watcher from seeing partial file)\n fs.renameSync(tmpOutput, finalPath);\n fs.chmodSync(finalPath, 0o664);\n\n // Signal systemd.paths watcher \u2014 atomic rename() causes systemd to lose\n // the inotify watch on the new file (systemd bug #20934), so we use a trigger file\n fs.writeFileSync(path.join(PHOTO_DIR, '.trigger'), Date.now().toString());\n } finally {\n // Clean up temp files (ENOENT is expected if conversion succeeded)\n try { fs.unlinkSync(tmpInput); } catch (e) { if (e.code !== 'ENOENT') console.error('Failed to clean temp input:', e.message); }\n try { fs.unlinkSync(tmpOutput); } catch (e) { if (e.code !== 'ENOENT') console.error('Failed to clean temp output:', e.message); }\n }\n\n // Remove placeholder if real photos now exist\n const placeholderPath = path.join(PHOTO_DIR, '000-placeholder.png');\n try {\n const files = fs.readdirSync(PHOTO_DIR).filter(f => /\\.(jpg|jpeg|png|webp)$/i.test(f) && !f.startsWith('.') && f !== '000-placeholder.png');\n if (files.length > 0 && fs.existsSync(placeholderPath)) {\n try { fs.unlinkSync(placeholderPath); } catch (unlinkErr) { console.error('Failed to remove placeholder:', unlinkErr.message); }\n }\n } catch (dirErr) {\n if (dirErr.code !== 'ENOENT') console.error('Failed to list photo directory for placeholder cleanup:', dirErr.message);\n }\n\n // Count photos for response\n const photoCount = fs.readdirSync(PHOTO_DIR).filter(f => /\\.(jpg|jpeg|png|webp)$/i.test(f) && !f.startsWith('.')).length;\n\n return [{ json: { success: true, filename: finalName, photoCount } }];\n\n} catch (err) {\n return [{ json: { success: false, error: 'Upload failed: ' + (err.message || 'Unknown error') } }];\n}\n" } }, { "id": "check-success", "name": "Check Success", "type": "n8n-nodes-base.if", "typeVersion": 2, "position": [ 500, 300 ], "parameters": { "conditions": { "options": { "caseSensitive": true, "leftValue": "", "typeValidation": "loose" }, "conditions": [ { "id": "is-success", "leftValue": "={{ $json.success }}", "rightValue": true, "operator": { "type": "boolean", "operation": "equals" } } ], "combinator": "and" }, "options": {} } }, { "id": "success-response", "name": "Success Response", "type": "n8n-nodes-base.respondToWebhook", "typeVersion": 1.1, "position": [ 700, 200 ], "parameters": { "respondWith": "json", "responseBody": "={{ JSON.stringify({ success: true, filename: $json.filename, photoCount: $json.photoCount }) }}", "options": { "responseCode": 200 } } }, { "id": "error-response", "name": "Error Response", "type": "n8n-nodes-base.respondToWebhook", "typeVersion": 1.1, "position": [ 700, 400 ], "parameters": { "respondWith": "json", "responseBody": "={{ JSON.stringify({ success: false, error: $json.error }) }}", "options": { "responseCode": 400 } } } ], "connections": { "Upload Webhook": { "main": [ [ { "node": "Validate and Save", "type": "main", "index": 0 } ] ] }, "Validate and Save": { "main": [ [ { "node": "Check Success", "type": "main", "index": 0 } ] ] }, "Check Success": { "main": [ [ { "node": "Success Response", "type": "main", "index": 0 } ], [ { "node": "Error Response", "type": "main", "index": 0 } ] ] } }, "settings": { "executionOrder": "v1" }, "active": true, "versionId": "a7a03d95-685d-4358-bdd7-1173182103b7" }