Service de signature numérique PDF de base
Avancé
Ceci est unSales, Product, IT Opsworkflow d'automatisation du domainecontenant 32 nœuds.Utilise principalement des nœuds comme If, Set, Code, Switch, Webhook. Créer une API REST de signature numérique PDF avec prise en charge du Webhook
Prérequis
- •Point de terminaison HTTP Webhook (généré automatiquement par n8n)
Nœuds utilisés (32)
Catégorie
Aperçu du workflow
Visualisation des connexions entre les nœuds, avec support du zoom et du déplacement
Exporter le workflow
Copiez la configuration JSON suivante dans n8n pour importer et utiliser ce workflow
{
"id": "V1vbO2m79cFNH59h",
"meta": {
"instanceId": "255b605d49a6677a536746e05401de51bb4c62e65036d9acdb9908f6567f0361"
},
"name": "Basic PDF Digital Sign Service",
"tags": [],
"nodes": [
{
"id": "a3aa7495-e5a8-4b7f-882a-e642fae414b8",
"name": "Valider les paramètres de génération de clé",
"type": "n8n-nodes-base.code",
"position": [
-220,
220
],
"parameters": {
"jsCode": "// Check required parameters for key generation\nconst requiredParams = [\n 'subjectCN', 'issuerCN', 'serialNumber', \n 'validFrom', 'validTo', 'password'\n];\n\nlet missingParams = [];\nconst requestBody = $input.item.json.body || {}; // Access the body object\n\nfor (const param of requiredParams) {\n if (!requestBody[param]) {\n missingParams.push(param);\n }\n}\n\nif (missingParams.length > 0) {\n return {\n json: {\n success: false,\n message: `Missing required parameters: ${missingParams.join(', ')}`\n }\n };\n}\n\n// Set default output directory if not provided\nconst outputDir = $input.item.json.keyPath || '/tmp';\nconst timestamp = new Date().getTime();\nconst outputPfx = `${outputDir}certificate_${timestamp}.pfx`;\nconst outputPrivateKey = `${outputDir}private_${timestamp}.key`;\nconst outputCertPem = `${outputDir}certificate_${timestamp}.pem`;\n\nreturn {\n json: {\n ...requestBody,\n success: true,\n outputDir,\n outputPfx,\n outputPrivateKey,\n outputCertPem\n }\n};\n"
},
"typeVersion": 1
},
{
"id": "6a463b95-04e4-421d-b6e0-46fb98c85e20",
"name": "Valider les paramètres de signature PDF",
"type": "n8n-nodes-base.code",
"position": [
-220,
380
],
"parameters": {
"jsCode": "// Check required parameters for PDF signing\nconst requiredParams = ['inputPdf', 'pfxFile', 'pfxPassword'];\n\n// Access the body object from input\nconst requestBody = $input.item.json.body || {}; \n\nlet missingParams = [];\nfor (const param of requiredParams) {\n if (!requestBody[param]) {\n missingParams.push(param);\n }\n}\n\nif (missingParams.length > 0) {\n return {\n json: {\n success: false,\n message: `Missing required parameters: ${missingParams.join(', ')}`\n }\n };\n}\n\n// Set default output directory if not provided\nconst pdfDir = $input.item.json.pdfPath || '/tmp';\nconst keyDir = $input.item.json.keyPath || '/tmp';\nconst outputDir = $input.item.json.pdfPath || '/tmp';\n\nconst timestamp = new Date().getTime();\nconst inputPdfPath = `${pdfDir}${requestBody.inputPdf}`;\nconst pfxFilePath = `${keyDir}${requestBody.pfxFile}`;\nconst outputPdfPath = `${pdfDir}signed_${timestamp}.pdf`;\n\nreturn {\n json: {\n ...requestBody,\n success: true,\n outputDir,\n inputPdfPath,\n pfxFilePath,\n outputPdfPath\n }\n};"
},
"typeVersion": 1
},
{
"id": "cec07784-a42b-4443-ad8e-1bd7686558c3",
"name": "Valider le téléchargement PDF",
"type": "n8n-nodes-base.code",
"position": [
80,
-440
],
"parameters": {
"jsCode": "// Check required parameters for PDF upload\nconst requiredParams = ['fileData'];\n\nlet missingParams = [];\nfor (const param of requiredParams) {\n if (!$input.item.json[param]) {\n missingParams.push(param);\n }\n}\n\nif (missingParams.length > 0) {\n return {\n json: {\n success: false,\n message: `Missing required parameters: ${missingParams.join(', ')}`\n }\n };\n}\n\n// Set default output directory if not provided\nconst outputDir = $input.item.json.outputDir || '/tmp';\nconst timestamp = new Date().getTime();\nconst outputPath = $input.item.json.fileName \n ? `${outputDir}/${$input.item.json.fileName}` \n : `${outputDir}/uploaded_pdf_${timestamp}.pdf`;\n\nreturn {\n json: {\n ...$input.item.json,\n success: true,\n outputDir,\n outputPath\n }\n};"
},
"typeVersion": 1
},
{
"id": "1b9304fd-f31d-45c7-8344-01c779e86f0d",
"name": "Valider le téléchargement de clé",
"type": "n8n-nodes-base.code",
"position": [
80,
-140
],
"parameters": {
"jsCode": "// Check required parameters for key upload\nconst requiredParams = ['fileData'];\n\nlet missingParams = [];\nfor (const param of requiredParams) {\n if (!$input.item.json[param]) {\n missingParams.push(param);\n }\n}\n\nif (missingParams.length > 0) {\n return {\n json: {\n success: false,\n message: `Missing required parameters: ${missingParams.join(', ')}`\n }\n };\n}\n\n// Set default output directory if not provided\nconst outputDir = $input.item.json.outputDir || '/tmp';\nconst timestamp = new Date().getTime();\nconst outputPath = $input.item.json.fileName \n ? `${outputDir}/${$input.item.json.fileName}` \n : `${outputDir}/uploaded_key_${timestamp}.pfx`;\n\nreturn {\n json: {\n ...$input.item.json,\n success: true,\n outputDir,\n outputPath\n }\n};"
},
"typeVersion": 1
},
{
"id": "efd59edb-6952-4165-ab21-745e03db74eb",
"name": "Générer les clés",
"type": "n8n-nodes-base.code",
"position": [
20,
220
],
"parameters": {
"jsCode": "console.log(\"!!!!!!!!!\" + process.env.NODE_PATH);\n\n// Key Generation Code\nconst forge = require('node-forge');\nconst fs = require('fs');\n\n// Get parameters from input\nconst subjectCN = $input.item.json.subjectCN;\nconst issuerCN = $input.item.json.issuerCN;\nconst serialNumber = $input.item.json.serialNumber;\nconst validFrom = $input.item.json.validFrom;\nconst validTo = $input.item.json.validTo;\nconst pfxPassword = $input.item.json.password;\nconst outputPfx = $input.item.json.outputPfx;\nconst outputPrivateKey = $input.item.json.outputPrivateKey;\nconst outputCertPem = $input.item.json.outputCertPem;\n\ntry {\n // Generate a key pair\n const keys = forge.pki.rsa.generateKeyPair(2048);\n const privateKey = keys.privateKey;\n const publicKey = keys.publicKey;\n\n // Create a certificate\n const cert = forge.pki.createCertificate();\n cert.publicKey = publicKey;\n cert.serialNumber = serialNumber;\n\n // Parse date strings (format: YYYYMMDDHHMMSS)\n const parseDate = (dateStr) => {\n const year = parseInt(dateStr.substring(0, 4));\n const month = parseInt(dateStr.substring(4, 6)) - 1; // JS months are 0-based\n const day = parseInt(dateStr.substring(6, 8));\n const hour = parseInt(dateStr.substring(8, 10));\n const minute = parseInt(dateStr.substring(10, 12));\n const second = parseInt(dateStr.substring(12, 14));\n \n return new Date(year, month, day, hour, minute, second);\n };\n\n cert.validity.notBefore = parseDate(validFrom);\n cert.validity.notAfter = parseDate(validTo);\n\n const attrs = [{\n name: 'commonName',\n value: subjectCN\n }, {\n name: 'countryName',\n value: 'US'\n }, {\n shortName: 'ST',\n value: 'State'\n }, {\n name: 'localityName',\n value: 'City'\n }, {\n name: 'organizationName',\n value: 'Organization'\n }, {\n shortName: 'OU',\n value: 'Test'\n }];\n\n cert.setSubject(attrs);\n cert.setIssuer(attrs); // Self-signed, so issuer = subject\n\n // Sign the certificate with the private key\n cert.sign(privateKey, forge.md.sha256.create());\n\n // Convert to PEM format\n const pemCert = forge.pki.certificateToPem(cert);\n const pemPrivateKey = forge.pki.privateKeyToPem(privateKey);\n\n // Create a PKCS#12 (PFX) file\n const p12Asn1 = forge.pkcs12.toPkcs12Asn1(\n privateKey, \n [cert], \n pfxPassword,\n { generateLocalKeyId: true, friendlyName: subjectCN }\n );\n\n const p12Der = forge.asn1.toDer(p12Asn1).getBytes();\n const p12b64 = forge.util.encode64(p12Der);\n\n // Save files\n fs.writeFileSync(outputPrivateKey, pemPrivateKey);\n fs.writeFileSync(outputCertPem, pemCert);\n fs.writeFileSync(outputPfx, forge.util.decode64(p12b64), { encoding: 'binary' });\n\n return {\n json: {\n success: true,\n message: \"Certificate and keys generated successfully\",\n fileName: outputPfx.split('/').pop(),\n filePaths: {\n pfx: outputPfx,\n privateKey: outputPrivateKey,\n certificate: outputCertPem\n },\n fileNames: {\n pfx: outputPfx.split('/').pop(),\n privateKey: outputPrivateKey.split('/').pop(),\n certificate: outputCertPem.split('/').pop()\n }\n }\n };\n} catch (error) {\n return {\n json: {\n success: false,\n message: `Error generating keys: ${error.message}`,\n error: error.stack\n }\n };\n}"
},
"typeVersion": 1
},
{
"id": "6834b314-dd66-429f-9264-6eba74c5984e",
"name": "Signer le PDF",
"type": "n8n-nodes-base.code",
"position": [
20,
380
],
"parameters": {
"jsCode": "// PDF Signing Code\nconst fs = require('fs');\nconst forge = require('node-forge');\nconst { SignPdf } = require('@signpdf/signpdf');\nconst { P12Signer } = require('@signpdf/signer-p12');\nconst { plainAddPlaceholder } = require('@signpdf/placeholder-plain');\n\n// Get parameters from input\n// const inputPdfBase64 = $input.item.json.inputPdf;\n// const pfxFileBase64 = $input.item.json.pfxFile;\nconst pfxPassword = $input.item.json.pfxPassword;\nconst inputPdfPath = $input.item.json.inputPdfPath;\nconst pfxFilePath = $input.item.json.pfxFilePath;\nconst outputPdfPath = $input.item.json.outputPdfPath;\n\ntry {\n // Read the PDF\n const pdfBuffer = fs.readFileSync(inputPdfPath);\n\n // Add a signature placeholder\n const pdfWithPlaceholder = plainAddPlaceholder({\n pdfBuffer,\n reason: 'Digital Signature',\n contactInfo: 'info@example.com',\n location: 'New York, USA',\n signatureLength: 8192 // Ensure enough space for signature\n });\n \n // Read the P12 file\n const p12Buffer = fs.readFileSync(pfxFilePath);\n\n // Create a signer instance\n const signer = new P12Signer(p12Buffer, {\n passphrase: pfxPassword\n });\n \n // Create SignPdf instance and sign the PDF\n const signPdfInstance = new SignPdf();\n const signedPdf = await signPdfInstance.sign(pdfWithPlaceholder, signer);\n \n // Write the signed PDF to file\n fs.writeFileSync(outputPdfPath, signedPdf);\n console.log(`PDF successfully signed: ${outputPdfPath}`);\n\n return {\n json: {\n success: true,\n message: \"PDF successfully signed\",\n filePath: outputPdfPath,\n fileName: outputPdfPath.split('/').pop()\n }\n };\n} catch (error) {\n return {\n json: {\n success: false,\n message: `Error signing PDF: ${error.message}`,\n error: error.stack\n }\n };\n}"
},
"typeVersion": 1
},
{
"id": "80e56344-b037-4c4f-8f18-b419e9c7516b",
"name": "Préparer la réponse de succès",
"type": "n8n-nodes-base.set",
"position": [
1380,
40
],
"parameters": {
"values": {
"string": [
{
"name": "serverFileName",
"value": "={{ $json.fileName }}"
}
],
"boolean": [
{
"name": "success",
"value": true
}
]
},
"options": {},
"keepOnlySet": true
},
"typeVersion": 1
},
{
"id": "e32d1e3e-6877-4c1f-b46a-0c3c67fba609",
"name": "Aiguillage d'opération",
"type": "n8n-nodes-base.switch",
"position": [
-520,
200
],
"parameters": {
"rules": {
"values": [
{
"outputKey": "upload",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.body.method }}",
"rightValue": "upload"
}
]
},
"renameOutput": true
},
{
"outputKey": "genKey",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "4ac6de12-4cb9-454e-a2b8-ebc879e430ba",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.body.method }}",
"rightValue": "genKey"
}
]
},
"renameOutput": true
},
{
"outputKey": "signPdf",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "d8fca3d7-e1da-486e-b6bb-01a676d888cb",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.body.method }}",
"rightValue": "signPdf"
}
]
},
"renameOutput": true
},
{
"outputKey": "download",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "6ae9a589-9208-48b0-873b-2b3c4db22718",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.body.method }}",
"rightValue": "download"
}
]
},
"renameOutput": true
}
]
},
"options": {}
},
"typeVersion": 3.2
},
{
"id": "f28cb401-f180-4877-9440-aeb0c9f07791",
"name": "Aiguillage de type de téléchargement",
"type": "n8n-nodes-base.switch",
"position": [
-100,
-300
],
"parameters": {
"rules": {
"values": [
{
"outputKey": "pdfDoc",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.body.uploadType }}",
"rightValue": "pdfDoc"
}
]
},
"renameOutput": true
},
{
"outputKey": "signKey",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "4790b1de-5541-4a46-a46a-708085c4c0a1",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.body.uploadType }}",
"rightValue": "signKey"
}
]
},
"renameOutput": true
}
]
},
"options": {}
},
"typeVersion": 3.2
},
{
"id": "5aa1d5f3-66d4-4440-a953-6e453d00b757",
"name": "Préparer les paramètres d'entrée",
"type": "n8n-nodes-base.set",
"position": [
-280,
-300
],
"parameters": {
"options": {
"stripBinary": true
},
"assignments": {
"assignments": [
{
"id": "b2323096-8db7-4c5a-8f52-8902f0e18785",
"name": "fileData",
"type": "object",
"value": "={{ $('API POST Endpoint').item.binary }}"
},
{
"id": "7d2593ba-8582-42cb-8312-6c11be5fbcbf",
"name": "uniqueFileName",
"type": "string",
"value": "={{ 'file_' + $now.toMillis() + '.' + $('API POST Endpoint').item.binary.fileData.mimeType.split('/')[1].replace(/\\n/g, '').trim() }}"
}
]
},
"includeOtherFields": true
},
"typeVersion": 3.4
},
{
"id": "ae983277-f9cf-43b3-86ef-1135919f976c",
"name": "Définir le chemin du fichier",
"type": "n8n-nodes-base.set",
"position": [
-700,
220
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "7378e581-86ac-43bc-b7c4-7faeef848cd8",
"name": "pdfPath",
"type": "string",
"value": "/data/files/"
},
{
"id": "f6592b74-6238-4bb7-9b8b-bbde240f2260",
"name": "keyPath",
"type": "string",
"value": "/data/files/"
}
]
},
"includeOtherFields": true
},
"typeVersion": 3.4
},
{
"id": "2667149c-8d3b-4772-be8c-a01c1a8efa6f",
"name": "Convertir PDF en fichier",
"type": "n8n-nodes-base.convertToFile",
"position": [
260,
-440
],
"parameters": {
"options": {
"fileName": "={{ $json.body.fileName }}",
"mimeType": "={{ $json.fileData.fileData.mimeType }}"
},
"operation": "toBinary",
"sourceProperty": "fileData.fileData.data"
},
"typeVersion": 1.1
},
{
"id": "6559070f-e071-4e3a-ad3b-87911032358f",
"name": "Écrire le fichier PDF sur disque",
"type": "n8n-nodes-base.readWriteFile",
"position": [
440,
-440
],
"parameters": {
"options": {
"append": false
},
"fileName": "={{ $('set file path').item.json.pdfPath }}{{ $('Prepare input params').item.json.uniqueFileName }}",
"operation": "write"
},
"typeVersion": 1
},
{
"id": "0f6dfb44-8d83-4539-bec8-4aa4066c42bb",
"name": "Lire le fichier PDF depuis le disque",
"type": "n8n-nodes-base.readWriteFile",
"position": [
620,
-440
],
"parameters": {
"options": {},
"fileSelector": "={{ $json.fileName }}"
},
"typeVersion": 1
},
{
"id": "59e18825-dd53-4b09-aefc-0c567ada7f1a",
"name": "Convertir PFX en fichier",
"type": "n8n-nodes-base.convertToFile",
"position": [
260,
-140
],
"parameters": {
"options": {
"fileName": "={{ $json.body.fileName }}",
"mimeType": "={{ $json.fileData.fileData.mimeType }}"
},
"operation": "toBinary",
"sourceProperty": "fileData.fileData.data"
},
"typeVersion": 1.1
},
{
"id": "d079d173-5c68-4b57-9efd-29a3ec89b6c0",
"name": "Écrire le fichier PFX sur disque",
"type": "n8n-nodes-base.readWriteFile",
"position": [
440,
-140
],
"parameters": {
"options": {
"append": false
},
"fileName": "={{ $('set file path').item.json.pdfPath }}{{ $('Prepare input params').item.json.uniqueFileName }}",
"operation": "write"
},
"typeVersion": 1
},
{
"id": "a2517543-fa29-4097-8f69-0c8cea6f9e07",
"name": "Lire le fichier PFX depuis le disque",
"type": "n8n-nodes-base.readWriteFile",
"position": [
620,
-140
],
"parameters": {
"options": {},
"fileSelector": "={{ $json.fileName }}"
},
"typeVersion": 1
},
{
"id": "2ec5c8cd-c9f5-4008-988b-ab724b9d8a0f",
"name": "Vérifier l'intégrité du fichier PDF",
"type": "n8n-nodes-base.set",
"position": [
800,
-380
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "8afd6a42-b651-4905-8339-92607d4b59cc",
"name": "success",
"type": "boolean",
"value": "={{ $json.fileName === $('Prepare input params').item.json.uniqueFileName }}"
},
{
"id": "d0125043-e398-47b2-9f9f-156b33c92cc4",
"name": "fileName",
"type": "string",
"value": "={{ $json.fileName }}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "2de3d4d5-6654-4019-b05a-2d1dc48c016f",
"name": "Vérifier l'intégrité du fichier PFX",
"type": "n8n-nodes-base.set",
"position": [
800,
-220
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "8afd6a42-b651-4905-8339-92607d4b59cc",
"name": "success",
"type": "boolean",
"value": "={{ $json.fileName === $('Prepare input params').item.json.uniqueFileName }}"
},
{
"id": "9af39faf-abf6-4d74-9001-444179abdaeb",
"name": "fileName",
"type": "string",
"value": "={{ $json.fileName }}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "5a2405a6-daef-4e57-8ab8-62dc9600cd26",
"name": "Vérifier la réussite",
"type": "n8n-nodes-base.if",
"position": [
1180,
180
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "dded9782-4619-4dc7-b264-f5e029099750",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
},
"leftValue": "={{ $json.success }}",
"rightValue": ""
}
]
}
},
"typeVersion": 2.2
},
{
"id": "e7c2412e-eba2-4092-808f-808a27c2a64f",
"name": "Définir les infos de fichier à télécharger",
"type": "n8n-nodes-base.set",
"position": [
-220,
740
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "f7affa96-85bc-4879-8ca3-aaabd985f67b",
"name": "fullFileName",
"type": "string",
"value": "={{ $json.body.fileName.endsWith('.pdf') ? $json.pdfPath + $json.body.fileName : $json.keyPath + $json.body.fileName }}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "5710c64c-5edf-4de8-bb0a-dd9379c6ba1e",
"name": "Lire le fichier à télécharger depuis le disque",
"type": "n8n-nodes-base.readWriteFile",
"position": [
0,
740
],
"parameters": {
"options": {},
"fileSelector": "={{ $json.fullFileName }}"
},
"typeVersion": 1
},
{
"id": "c6c8aea2-a770-4e32-94b5-c4b9f18ea3fe",
"name": "Endpoint POST API",
"type": "n8n-nodes-base.webhook",
"position": [
-900,
220
],
"webhookId": "0c12b17f-77a7-46b2-99a0-432b29b58dfb",
"parameters": {
"path": "docu-digi-sign",
"options": {
"binaryData": false
},
"httpMethod": "POST",
"responseMode": "responseNode"
},
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}Foire aux questions
Comment utiliser ce workflow ?
Copiez le code de configuration JSON ci-dessus, créez un nouveau workflow dans votre instance n8n et sélectionnez "Importer depuis le JSON", collez la configuration et modifiez les paramètres d'authentification selon vos besoins.
Dans quelles scénarios ce workflow est-il adapté ?
Avancé - Ventes, Produit, Opérations IT
Est-ce payant ?
Ce workflow est entièrement gratuit et peut être utilisé directement. Veuillez noter que les services tiers utilisés dans le workflow (comme l'API OpenAI) peuvent nécessiter un paiement de votre part.
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Description de la difficulté
Auteur
Ferenc Erb
@fefehunWith 30+ years in IT and 20+ years in leadership, I specialize in no-code automation with n8n, optimizing workflows and integrating systems efficiently. As an Agile Coach and Project Manager, I’ve led teams, managed R&D, and driven IT transformations. Skilled in n8n, Java, Node.js, and cloud solutions, I help businesses streamline operations. Let’s connect if you need an n8n expert for automation!
Liens externes
Voir sur n8n.io →
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