Initiating Genesys Cloud Web Messaging Virus Scans via REST API with Node.js

What You Will Build

• A Node.js integration module that programmatically triggers virus scans for files attached to web messaging sessions, enforces quarantine directives, and validates payloads against security constraints.
• This tutorial uses the Genesys Cloud Files and Webhooks REST APIs with direct HTTP requests via axios.
• The implementation covers Node.js 18+ with modern async/await patterns, strict schema validation, exponential backoff for rate limiting, and structured audit logging.

Prerequisites

• OAuth Client Type: Confidential Client (Client Credentials Grant)
• Required Scopes: files:read, files:write, webhooks:write, platform:read
• SDK/API Version: Genesys Cloud API v2 (REST), axios v1.6+
• Runtime Requirements: Node.js 18 or higher, npm or pnpm package manager
• External Dependencies: axios, dotenv, uuid, ajv (for JSON schema validation)

Authentication Setup

Genesys Cloud uses OAuth 2.0 for API authentication. The client credentials flow is the standard method for server-to-server integrations. The following code retrieves an access token, caches it in memory, and handles expiration.

const axios = require('axios');
const dotenv = require('dotenv');

dotenv.config();

const GENESYS_CLOUD_BASE_URL = process.env.GENESYS_CLOUD_BASE_URL || 'https://api.mypurecloud.com';
const CLIENT_ID = process.env.GENESYS_CLOUD_CLIENT_ID;
const CLIENT_SECRET = process.env.GENESYS_CLOUD_CLIENT_SECRET;

let tokenCache = {
  accessToken: null,
  expiryTime: 0
};

/**
 * Retrieves an OAuth access token from Genesys Cloud.
 * Implements in-memory caching to avoid unnecessary token requests.
 */
async function getAccessToken() {
  const now = Date.now();
  
  // Return cached token if still valid (subtract 60 seconds for safety margin)
  if (tokenCache.accessToken && now < tokenCache.expiryTime - 60000) {
    return tokenCache.accessToken;
  }

  const authPayload = {
    grant_type: 'client_credentials',
    client_id: CLIENT_ID,
    client_secret: CLIENT_SECRET
  };

  try {
    const response = await axios.post(`${GENESYS_CLOUD_BASE_URL}/oauth/token`, authPayload, {
      headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
    });

    const { access_token, expires_in } = response.data;
    tokenCache.accessToken = access_token;
    tokenCache.expiryTime = now + (expires_in * 1000);
    
    return access_token;
  } catch (error) {
    if (error.response) {
      throw new Error(`OAuth authentication failed with status ${error.response.status}: ${error.response.data.error_description || JSON.stringify(error.response.data)}`);
    }
    throw error;
  }
}

Implementation

Step 1: Payload Construction and Schema Validation

The scan trigger payload must contain a valid file identifier, a quarantine action directive, and configuration parameters for the scan engine matrix. Genesys Cloud manages the underlying antivirus engine internally, so the integration layer validates the engine preference against an allowed matrix before submission. The payload is validated against a JSON schema to prevent malformed requests from reaching the security gateway.

const Ajv = require('ajv');
const ajv = new Ajv({ allErrors: true });

// Allowed scan engines mapped to Genesys Cloud internal routing tags
const SCAN_ENGINE_MATRIX = {
  'standard': { engine: 'default', timeout: 30000 },
  'deep': { engine: 'enhanced', timeout: 60000 },
  'archive': { engine: 'archive_parser', timeout: 45000 }
};

// Quarantine actions supported by the platform
const ALLOWED_QUARANTINE_ACTIONS = ['auto_quarantine', 'notify_and_hold', 'allow_with_flag'];

const scanTriggerSchema = {
  type: 'object',
  required: ['fileId', 'scanEngine', 'quarantineAction'],
  properties: {
    fileId: { type: 'string', format: 'uuid' },
    scanEngine: { type: 'string', enum: Object.keys(SCAN_ENGINE_MATRIX) },
    quarantineAction: { type: 'string', enum: ALLOWED_QUARANTINE_ACTIONS },
    metadata: { type: 'object' }
  },
  additionalProperties: false
};

const validateScanPayload = ajv.compile(scanTriggerSchema);

/**
 * Validates and constructs the scan trigger configuration.
 * Throws an error if the payload violates security gateway constraints.
 */
function buildScanConfiguration(rawPayload) {
  const valid = validateScanPayload(rawPayload);
  if (!valid) {
    const errorMessages = validateScanPayload.errors.map(e => `${e.instancePath} ${e.message}`);
    throw new Error(`Payload validation failed: ${errorMessages.join('; ')}`);
  }

  const engineConfig = SCAN_ENGINE_MATRIX[rawPayload.scanEngine];
  if (!engineConfig) {
    throw new Error(`Unsupported scan engine: ${rawPayload.scanEngine}`);
  }

  return {
    fileId: rawPayload.fileId,
    engineConfig,
    quarantineAction: rawPayload.quarantineAction,
    metadata: rawPayload.metadata || {},
    validatedAt: new Date().toISOString()
  };
}

Step 2: Atomic Scan Initiation with Retry Logic

The scan initiation uses an atomic POST request to /api/v2/files/{fileId}/scans. Genesys Cloud enforces strict rate limits on file operations. The following function implements exponential backoff with jitter to handle 429 Too Many Requests responses gracefully. It also tracks initiation latency for security efficiency monitoring.

/**
 * Initiates a virus scan with exponential backoff retry logic for 429 errors.
 * @param {string} token - Valid OAuth access token
 * @param {string} fileId - UUID of the file to scan
 * @param {object} config - Validated scan configuration
 */
async function initiateScan(token, fileId, config) {
  const maxRetries = 3;
  let attempt = 0;
  const startTime = Date.now();

  while (attempt <= maxRetries) {
    try {
      const response = await axios.post(
        `${GENESYS_CLOUD_BASE_URL}/api/v2/files/${fileId}/scans`,
        {}, // Genesys Cloud scan endpoint accepts an empty body; engine routing is handled by platform configuration
        {
          headers: {
            'Authorization': `Bearer ${token}`,
            'Content-Type': 'application/json'
          }
        }
      );

      const latency = Date.now() - startTime;
      console.log(`[AUDIT] Scan initiated for file ${fileId}. Latency: ${latency}ms. Attempt: ${attempt + 1}`);
      
      return {
        scanId: response.data.id,
        status: response.data.status,
        initiatedAt: new Date().toISOString(),
        latencyMs: latency,
        attempt: attempt + 1
      };
    } catch (error) {
      if (error.response && error.response.status === 429) {
        attempt++;
        if (attempt > maxRetries) {
          throw new Error(`Scan initiation failed after ${maxRetries} retries due to rate limiting (429).`);
        }
        const retryAfter = error.response.headers['retry-after'] || Math.pow(2, attempt) + (Math.random() * 1000);
        console.warn(`Rate limit hit (429). Retrying in ${retryAfter}ms...`);
        await new Promise(resolve => setTimeout(resolve, retryAfter));
      } else {
        throw error;
      }
    }
  }
}

Step 3: Result Polling, Webhook Synchronization, and Audit Logging

After initiation, the scan runs asynchronously. The integration must poll the scan status endpoint, synchronize results with external security information systems via webhook callbacks, and generate compliance audit logs. The following function handles the polling cycle, webhook registration, and threat detection rate tracking.

/**
 * Polls scan status, registers webhook for external sync, and generates audit logs.
 * @param {string} token - Valid OAuth access token
 * @param {string} fileId - UUID of the scanned file
 * @param {string} scanId - UUID of the initiated scan
 * @param {object} config - Original scan configuration
 */
async function monitorAndSyncScan(token, fileId, scanId, config) {
  const pollingInterval = 5000; // 5 seconds
  const maxPollTime = 120000; // 2 minutes max
  const startTime = Date.now();
  let threatDetected = false;

  // Register webhook for external security system synchronization
  await registerSecurityWebhook(token, config.quarantineAction);

  while (Date.now() - startTime < maxPollTime) {
    try {
      const response = await axios.get(
        `${GENESYS_CLOUD_BASE_URL}/api/v2/files/${fileId}/scans/${scanId}`,
        { headers: { 'Authorization': `Bearer ${token}` } }
      );

      const scanResult = response.data;
      console.log(`[MONITOR] File ${fileId} scan status: ${scanResult.status}`);

      if (scanResult.status === 'completed' || scanResult.status === 'failed') {
        threatDetected = scanResult.result === 'malware' || scanResult.quarantined === true;
        
        const auditLog = {
          timestamp: new Date().toISOString(),
          fileId,
          scanId,
          status: scanResult.status,
          result: scanResult.result,
          quarantined: scanResult.quarantined,
          quarantineAction: config.quarantineAction,
          threatDetected,
          totalLatencyMs: Date.now() - startTime,
          complianceHash: computeAuditHash(fileId, scanId, scanResult.result)
        };

        console.log('[AUDIT] Scan completed. Generating compliance log:', JSON.stringify(auditLog, null, 2));
        
        // Trigger external security system callback
        await notifyExternalSecuritySystem(auditLog, threatDetected);
        
        return auditLog;
      }

      await new Promise(resolve => setTimeout(resolve, pollingInterval));
    } catch (error) {
      if (error.response && error.response.status === 404) {
        throw new Error(`Scan ${scanId} not found. It may have been purged or invalidated.`);
      }
      console.error(`Polling error: ${error.message}. Retrying...`);
      await new Promise(resolve => setTimeout(resolve, pollingInterval));
    }
  }

  throw new Error(`Scan ${scanId} did not complete within the allowed timeframe.`);
}

/**
 * Registers a webhook to synchronize scan events with external security information systems.
 */
async function registerSecurityWebhook(token, quarantineAction) {
  const webhookPayload = {
    name: `SecurityScanSync_${quarantineAction}_${Date.now()}`,
    enabled: true,
    type: 'webhook',
    description: 'Synchronizes Genesys Cloud file scan results with external SIEM',
    eventFilters: [
      {
        event: 'files:scan:completed',
        filter: {
          quarantineAction: quarantineAction
        }
      }
    ],
    url: process.env.EXTERNAL_SECURITY_WEBHOOK_URL || 'https://siem.example.com/api/v1/genesys/scan-sync',
    headers: {
      'X-Security-Source': 'GenesysCloud',
      'Content-Type': 'application/json'
    }
  };

  try {
    await axios.post(`${GENESYS_CLOUD_BASE_URL}/api/v2/platform/webhooks/webhooks`, webhookPayload, {
      headers: { 'Authorization': `Bearer ${token}`, 'Content-Type': 'application/json' }
    });
    console.log('[WEBHOOK] External security synchronization endpoint registered.');
  } catch (error) {
    console.warn(`[WEBHOOK] Failed to register sync endpoint: ${error.message}. Continuing with local polling.`);
  }
}

function computeAuditHash(fileId, scanId, result) {
  // Simple deterministic hash for compliance tracking
  const str = `${fileId}-${scanId}-${result}-${Date.now()}`;
  let hash = 0;
  for (let i = 0; i < str.length; i++) {
    const char = str.charCodeAt(i);
    hash = ((hash << 5) - hash) + char;
    hash = hash & hash; // Convert to 32bit integer
  }
  return Math.abs(hash).toString(16);
}

async function notifyExternalSecuritySystem(auditLog, threatDetected) {
  // Simulates POST to external SIEM/SOAR platform
  console.log(`[EXTERNAL] Notifying security system. Threat: ${threatDetected}. Payload:`, auditLog);
  // In production: await axios.post(process.env.SIEM_ENDPOINT, auditLog);
}

Complete Working Example

The following script combines all components into a single executable module. It retrieves an authentication token, validates the trigger payload, initiates the scan with retry logic, monitors the result, and generates compliance audit logs.

const axios = require('axios');
const dotenv = require('dotenv');
const Ajv = require('ajv');

dotenv.config();

const GENESYS_CLOUD_BASE_URL = process.env.GENESYS_CLOUD_BASE_URL || 'https://api.mypurecloud.com';
const CLIENT_ID = process.env.GENESYS_CLOUD_CLIENT_ID;
const CLIENT_SECRET = process.env.GENESYS_CLOUD_CLIENT_SECRET;

let tokenCache = { accessToken: null, expiryTime: 0 };

async function getAccessToken() {
  const now = Date.now();
  if (tokenCache.accessToken && now < tokenCache.expiryTime - 60000) {
    return tokenCache.accessToken;
  }

  const authPayload = {
    grant_type: 'client_credentials',
    client_id: CLIENT_ID,
    client_secret: CLIENT_SECRET
  };

  try {
    const response = await axios.post(`${GENESYS_CLOUD_BASE_URL}/oauth/token`, authPayload, {
      headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
    });
    const { access_token, expires_in } = response.data;
    tokenCache.accessToken = access_token;
    tokenCache.expiryTime = now + (expires_in * 1000);
    return access_token;
  } catch (error) {
    throw new Error(`OAuth failed: ${error.response?.data?.error_description || error.message}`);
  }
}

const SCAN_ENGINE_MATRIX = {
  'standard': { engine: 'default', timeout: 30000 },
  'deep': { engine: 'enhanced', timeout: 60000 }
};
const ALLOWED_QUARANTINE_ACTIONS = ['auto_quarantine', 'notify_and_hold'];

const scanTriggerSchema = {
  type: 'object',
  required: ['fileId', 'scanEngine', 'quarantineAction'],
  properties: {
    fileId: { type: 'string', format: 'uuid' },
    scanEngine: { type: 'string', enum: Object.keys(SCAN_ENGINE_MATRIX) },
    quarantineAction: { type: 'string', enum: ALLOWED_QUARANTINE_ACTIONS }
  },
  additionalProperties: false
};
const validateScanPayload = new Ajv({ allErrors: true }).compile(scanTriggerSchema);

function buildScanConfiguration(rawPayload) {
  const valid = validateScanPayload(rawPayload);
  if (!valid) {
    throw new Error(`Validation failed: ${validateScanPayload.errors.map(e => `${e.instancePath} ${e.message}`).join('; ')}`);
  }
  return {
    fileId: rawPayload.fileId,
    engineConfig: SCAN_ENGINE_MATRIX[rawPayload.scanEngine],
    quarantineAction: rawPayload.quarantineAction,
    validatedAt: new Date().toISOString()
  };
}

async function initiateScan(token, fileId) {
  const maxRetries = 3;
  let attempt = 0;
  const startTime = Date.now();

  while (attempt <= maxRetries) {
    try {
      const response = await axios.post(
        `${GENESYS_CLOUD_BASE_URL}/api/v2/files/${fileId}/scans`,
        {},
        { headers: { 'Authorization': `Bearer ${token}`, 'Content-Type': 'application/json' } }
      );
      return {
        scanId: response.data.id,
        status: response.data.status,
        initiatedAt: new Date().toISOString(),
        latencyMs: Date.now() - startTime
      };
    } catch (error) {
      if (error.response?.status === 429 && attempt < maxRetries) {
        const delay = error.response.headers['retry-after'] || Math.pow(2, attempt + 1) * 1000;
        await new Promise(resolve => setTimeout(resolve, delay));
        attempt++;
        continue;
      }
      throw error;
    }
  }
}

async function monitorAndSyncScan(token, fileId, scanId) {
  const maxPollTime = 120000;
  const startTime = Date.now();

  while (Date.now() - startTime < maxPollTime) {
    try {
      const response = await axios.get(
        `${GENESYS_CLOUD_BASE_URL}/api/v2/files/${fileId}/scans/${scanId}`,
        { headers: { 'Authorization': `Bearer ${token}` } }
      );
      const scanResult = response.data;
      
      if (['completed', 'failed'].includes(scanResult.status)) {
        const threatDetected = scanResult.result === 'malware' || scanResult.quarantined === true;
        const auditLog = {
          timestamp: new Date().toISOString(),
          fileId,
          scanId,
          status: scanResult.status,
          result: scanResult.result,
          quarantined: scanResult.quarantined,
          threatDetected,
          totalLatencyMs: Date.now() - startTime
        };
        console.log('[AUDIT] Compliance log generated:', JSON.stringify(auditLog, null, 2));
        return auditLog;
      }
      await new Promise(resolve => setTimeout(resolve, 5000));
    } catch (error) {
      if (error.response?.status === 404) throw new Error('Scan not found.');
      await new Promise(resolve => setTimeout(resolve, 5000));
    }
  }
  throw new Error('Scan timed out.');
}

async function runScanWorkflow() {
  try {
    const token = await getAccessToken();
    
    // Example payload matching web messaging file attachment
    const triggerPayload = {
      fileId: 'a1b2c3d4-e5f6-7890-abcd-ef1234567890',
      scanEngine: 'standard',
      quarantineAction: 'auto_quarantine'
    };

    const config = buildScanConfiguration(triggerPayload);
    console.log('[CONFIG] Payload validated against security gateway constraints.');

    const scanInit = await initiateScan(token, config.fileId);
    console.log(`[INIT] Scan triggered. ID: ${scanInit.scanId}. Latency: ${scanInit.latencyMs}ms`);

    const auditResult = await monitorAndSyncScan(token, config.fileId, scanInit.scanId);
    console.log('[COMPLETE] Workflow finished successfully.');
  } catch (error) {
    console.error('[FATAL] Workflow failed:', error.message);
    process.exit(1);
  }
}

runScanWorkflow();

Common Errors & Debugging

Error: 401 Unauthorized

• What causes it: The OAuth token is expired, malformed, or missing from the Authorization header.
• How to fix it: Verify the client_id and client_secret environment variables. Ensure the token retrieval function refreshes the cache before each request. Check the expires_in value from the /oauth/token response.
• Code showing the fix: The getAccessToken function implements a 60-second safety margin before cache expiration and automatically fetches a new token when the margin is breached.

Error: 403 Forbidden

• What causes it: The OAuth client lacks the required files:read or files:write scope, or the client does not have permission to access the specified file.
• How to fix it: Navigate to the Genesys Cloud admin console, locate the OAuth client, and add files:read and files:write to the scope list. Verify that the file ID belongs to a web messaging session accessible by the client.
• Code showing the fix: Scope validation is handled at the platform level. The integration should catch 403 responses and log the missing scope for administrative review.

Error: 429 Too Many Requests

• What causes it: The integration exceeds Genesys Cloud API rate limits for file operations or scan initiations.
• How to fix it: Implement exponential backoff with jitter. Read the Retry-After header from the response. The initiateScan function handles this automatically by pausing execution and retrying up to three times.
• Code showing the fix: See the while (attempt <= maxRetries) loop in initiateScan, which parses Retry-After and applies dynamic delays.

Error: 400 Bad Request

• What causes it: The payload fails schema validation, or the fileId format is invalid.
• How to fix it: Ensure the fileId matches UUID v4 format. Validate the scanEngine and quarantineAction against the allowed matrices before submission. The buildScanConfiguration function throws descriptive errors when validation fails.
• Code showing the fix: The Ajv compiler checks the payload structure and returns precise field-level errors that are thrown before any HTTP request is made.

Official References

• Genesys Cloud Files API Documentation
• File Scans Endpoint Reference
• OAuth Client Credentials Flow
• Webhooks API Documentation
• Rate Limiting and Retry Guidelines