Diagnosing WebSocket Drops and Audio Latency in Genesys Cloud AppFoundry Cognigy Integrations

What You Will Build

• This tutorial provides a Node.js diagnostic tool that monitors WebSocket heartbeat intervals, measures round-trip latency, and logs connection drop events for Genesys Cloud AppFoundry bots integrated with NICE Cognigy.
• The code utilizes the Genesys Cloud Platform Client SDK for Node.js to retrieve bot configuration and custom HTTP requests to simulate and monitor the WebSocket lifecycle.
• The implementation uses JavaScript (Node.js 18+) with the ws library for WebSocket handling and axios for REST API calls.

Prerequisites

• OAuth Client Type: Client Credentials Grant.
• Required Scopes:
  • bot:bot:read (to inspect bot configuration)
  • analytics:events:read (to access real-time event data if needed)
  • webchat:webchat:read (if testing webchat endpoints directly)
• SDK Version: @genesyscloud/purecloud-platform-client-v2 (latest stable).
• Runtime: Node.js 18 or higher.
• Dependencies:
  • @genesyscloud/purecloud-platform-client-v2
  • ws (WebSocket client)
  • axios (HTTP client)
  • dotenv (Environment variable management)

Authentication Setup

Genesys Cloud APIs require OAuth 2.0 authentication. For background diagnostic tools, the Client Credentials flow is standard. You must cache the access token and handle expiration to prevent 401 Unauthorized errors during long-running diagnostics.

Install dependencies:

npm install @genesyscloud/purecloud-platform-client-v2 ws axios dotenv

Create a .env file with your credentials:

GENESYS_CLIENT_ID=your_client_id
GENESYS_CLIENT_SECRET=your_client_secret
GENESYS_REGION=us-east-1
COGNIGY_BOT_ID=your_cognigy_bot_id

Implement the authentication helper. This function retrieves a token and stores it with an expiration timestamp.

import axios from 'axios';
import dotenv from 'dotenv';

dotenv.config();

const GENESYS_ENVIRONMENT = process.env.GENESYS_REGION || 'us-east-1';
const API_BASE_URL = `https://${GENESYS_ENVIRONMENT}.mypurecloud.com`;
const AUTH_URL = `${API_BASE_URL}/oauth/token`;

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

/**
 * Retrieves an OAuth access token using Client Credentials.
 * Caches the token and refreshes it only if expired.
 */
async function getAccessToken() {
    const now = Date.now();
    
    // Return cached token if still valid (subtract 60s buffer for safety)
    if (tokenCache.accessToken && now < tokenCache.expiresAt - 60000) {
        return tokenCache.accessToken;
    }

    try {
        const response = await axios.post(AUTH_URL, null, {
            params: {
                grant_type: 'client_credentials',
                client_id: process.env.GENESYS_CLIENT_ID,
                client_secret: process.env.GENESYS_CLIENT_SECRET
            },
            headers: {
                'Content-Type': 'application/x-www-form-urlencoded'
            }
        });

        if (response.status === 200) {
            tokenCache.accessToken = response.data.access_token;
            tokenCache.expiresAt = now + (response.data.expires_in * 1000);
            return tokenCache.accessToken;
        } else {
            throw new Error(`Auth failed with status ${response.status}`);
        }
    } catch (error) {
        console.error('Authentication Error:', error.message);
        throw error;
    }
}

Implementation

Step 1: Inspect Bot Configuration for WebSocket Constraints

Before diagnosing runtime drops, verify the static configuration of the AppFoundry bot. Misconfigured timeout values or payload sizes often cause premature disconnections. We will use the Genesys SDK to fetch the bot definition.

import PureCloudPlatformClientV2 from "@genesyscloud/purecloud-platform-client-v2";

/**
 * Fetches bot configuration to check for timeout and size constraints.
 */
async function inspectBotConfig(botId) {
    const platformClient = new PureCloudPlatformClientV2();
    
    // Set environment
    platformClient.setEnvironment(`mypurecloud.com`, process.env.GENESYS_REGION);
    
    // Authenticate
    const token = await getAccessToken();
    platformClient.setAccessToken(token);

    try {
        // Retrieve bot definition
        const response = await platformClient.botsApi.getBot(botId);
        
        console.log('--- Bot Configuration Analysis ---');
        console.log('Bot ID:', response.data.id);
        console.log('Name:', response.data.name);
        
        // Analyze AppFoundry specific settings if present in extensions or description
        // Note: Genesys SDK does not expose raw AppFoundry config directly via botsApi.getBot
        // We must look at the bot's 'extensions' or check the AppFoundry specific API if available.
        // For Cognigy, the integration is often opaque to the standard bot API.
        // However, we can check the bot's 'enabled' status and 'version'.
        
        console.log('Version:', response.data.version);
        console.log('Enabled:', response.data.enabled);
        
        // Check for any custom metadata that might hint at timeout settings
        if (response.data.extensions) {
            console.log('Extensions:', JSON.stringify(response.data.extensions, null, 2));
        }

        return response.data;
    } catch (error) {
        if (error.response && error.response.status === 404) {
            throw new Error(`Bot ID ${botId} not found. Check your COGNIGY_BOT_ID.`);
        }
        throw error;
    }
}

Step 2: Establish and Monitor WebSocket Connection

The core of the diagnosis involves establishing a WebSocket connection to the Genesys Cloud Webchat or Bot endpoint and measuring the latency of ping/pong cycles. Genesys Cloud Webchat uses a specific WebSocket endpoint structure.

Important: The WebSocket URL depends on the region. For us-east-1, the endpoint is typically wss://us-east-1.mypurecloud.com/api/v2/webchat/conversations.

We will create a diagnostic client that connects, sends periodic pings, and measures the time delta.

import WebSocket from 'ws';

/**
 * Diagnostic WebSocket Client
 * Measures latency and detects drops.
 */
class DiagnosticWebSocketClient {
    constructor(wsUrl, authToken) {
        this.wsUrl = wsUrl;
        this.authToken = authToken;
        this.ws = null;
        this.pingInterval = null;
        this.latencies = [];
        this.drops = [];
        this.isConnected = false;
    }

    connect() {
        return new Promise((resolve, reject) => {
            // Genesys Webchat WS requires specific headers or query params depending on implementation.
            // Standard Genesys Webchat WS endpoint:
            // wss://{region}.mypurecloud.com/api/v2/webchat/conversations
            
            // Note: For AppFoundry/Cognigy specifically, the connection might be proxied.
            // This example targets the standard Genesys Webchat WS which routes to the bot.
            
            const ws = new WebSocket(this.wsUrl, {
                headers: {
                    'Authorization': `Bearer ${this.authToken}`,
                    'Content-Type': 'application/json'
            }
            });

            this.ws = ws;

            ws.on('open', () => {
                console.log('[WS] Connection established.');
                this.isConnected = true;
                this.startLatencyMonitoring();
                resolve();
            });

            ws.on('message', (data) => {
                this.handleMessage(data);
            });

            ws.on('close', (code, reason) => {
                console.log(`[WS] Connection closed. Code: ${code}, Reason: ${reason || 'None'}`);
                this.isConnected = false;
                this.stopLatencyMonitoring();
                this.drops.push({
                    timestamp: new Date().toISOString(),
                    code: code,
                    reason: reason ? reason.toString() : 'No reason provided'
                });
            });

            ws.on('error', (error) => {
                console.error('[WS] Error:', error.message);
                this.isConnected = false;
                this.stopLatencyMonitoring();
            });
        });
    }

    handleMessage(data) {
        // Log incoming messages for debugging payload size
        const messageStr = data.toString();
        const messageLen = messageStr.length;
        
        // If the payload is excessively large, it may cause latency or drops
        if (messageLen > 10000) {
            console.warn(`[WS] Large payload received: ${messageLen} bytes`);
        }
        
        // Echo or process as needed. For diagnosis, we just track receipt.
    }

    startLatencyMonitoring() {
        // Send a ping every 5 seconds
        this.pingInterval = setInterval(() => {
            if (!this.isConnected || !this.ws || this.ws.readyState !== WebSocket.OPEN) {
                return;
            }

            const startTime = Date.now();
            
            // Genesys Webchat WS protocol: Send a 'ping' message type
            // The payload structure depends on the specific Webchat version.
            // Standard format: { "type": "ping", "id": "unique-id" }
            const pingPayload = JSON.stringify({
                type: 'ping',
                id: `diag-${startTime}`
            });

            this.ws.send(pingPayload);

            // We expect a pong back. In a real diagnostic, we would listen for the specific pong.
            // For simplicity, we measure the round trip if we receive a message back within 2s.
            // However, standard WS 'ping' method is lower level.
            
            // Using application-level ping/pong is safer for bot logic debugging.
            // Let's assume the bot or platform responds to a specific diagnostic command.
            // If not, we rely on the WS library's built-in ping/pong for network latency.
            
            // Alternative: Use WS library ping
            this.ws.ping((err) => {
                if (err) {
                    console.error('[WS] Ping failed:', err);
                } else {
                    const endTime = Date.now();
                    const latency = endTime - startTime;
                    this.latencies.push(latency);
                    console.log(`[WS] Latency: ${latency}ms`);
                    
                    // Alert if latency exceeds threshold (e.g., 1000ms)
                    if (latency > 1000) {
                        console.warn(`[WS] High latency detected: ${latency}ms`);
                    }
                }
            });

        }, 5000);
    }

    stopLatencyMonitoring() {
        if (this.pingInterval) {
            clearInterval(this.pingInterval);
            this.pingInterval = null;
        }
    }

    disconnect() {
        this.stopLatencyMonitoring();
        if (this.ws) {
            this.ws.close(1000, 'Diagnostic complete');
        }
    }

    getStats() {
        const avgLatency = this.latencies.length > 0 
            ? this.latencies.reduce((a, b) => a + b, 0) / this.latencies.length 
            : 0;
            
        return {
            totalLatencies: this.latencies.length,
            averageLatency: avgLatency.toFixed(2) + 'ms',
            maxLatency: this.latencies.length > 0 ? Math.max(...this.latencies) + 'ms' : 'N/A',
            drops: this.drops
        };
    }
}

Step 3: Correlate Drops with Genesys Cloud Events

WebSocket drops can be caused by Genesys Cloud internal routing, Cognigy backend timeouts, or network issues. To distinguish these, we correlate the drop timestamp with Genesys Cloud interaction events.

We will query the Interaction API for recent events associated with the conversation.

import PureCloudPlatformClientV2 from "@genesyscloud/purecloud-platform-client-v2";

/**
 * Fetches recent interaction events to correlate with WebSocket drops.
 * Requires analytics:events:read scope.
 */
async function fetchInteractionEvents(conversationId, startTime, endTime) {
    const platformClient = new PureCloudPlatformClientV2();
    platformClient.setEnvironment(`mypurecloud.com`, process.env.GENESYS_REGION);
    const token = await getAccessToken();
    platformClient.setAccessToken(token);

    try {
        // Query for events within the time window of the drop
        // We look for 'disconnect' or 'error' events
        const response = await platformClient.analyticsApi.postAnalyticsEventsQuery({
            body: {
                dateFrom: startTime,
                dateTo: endTime,
                entities: [
                    {
                        id: conversationId,
                        type: 'conversation'
                    }
                ],
                eventTypes: [
                    'interaction.disconnected',
                    'interaction.error',
                    'bot.message.received',
                    'bot.message.sent'
                ],
                pageSize: 100
            }
        });

        console.log('--- Interaction Events Analysis ---');
        if (response.data.events && response.data.events.length > 0) {
            response.data.events.forEach(event => {
                console.log(`Event: ${event.type}, Time: ${event.timestamp}, Data:`, JSON.stringify(event.data));
            });
        } else {
            console.log('No relevant events found in the specified window.');
        }
        
        return response.data.events;
    } catch (error) {
        console.error('Error fetching interaction events:', error.message);
        return [];
    }
}

Complete Working Example

This script combines authentication, configuration inspection, WebSocket monitoring, and event correlation into a single runnable diagnostic tool.

import dotenv from 'dotenv';
import { getAccessToken } from './auth.js'; // Assume auth.js contains the getAccessToken function from Step 1
import { inspectBotConfig } from './botConfig.js'; // Assume botConfig.js contains inspectBotConfig from Step 1
import { DiagnosticWebSocketClient } from './wsClient.js'; // Assume wsClient.js contains DiagnosticWebSocketClient from Step 2
import { fetchInteractionEvents } from './events.js'; // Assume events.js contains fetchInteractionEvents from Step 3

dotenv.config();

async function runDiagnostic() {
    const botId = process.env.COGNIGY_BOT_ID;
    if (!botId) {
        throw new Error('COGNIGY_BOT_ID not set in .env');
    }

    console.log('Starting Genesys Cloud Cognigy Bot Diagnostic...');

    // 1. Check Bot Configuration
    console.log('\n--- Step 1: Inspecting Bot Configuration ---');
    try {
        const botConfig = await inspectBotConfig(botId);
        console.log('Bot configuration retrieved successfully.');
    } catch (error) {
        console.error('Failed to retrieve bot configuration:', error.message);
        // Continue anyway, as config check is advisory
    }

    // 2. Establish WebSocket Connection
    console.log('\n--- Step 2: Establishing WebSocket Connection ---');
    
    // Construct WebSocket URL
    // Note: The actual WS URL for Webchat is region-specific.
    // For us-east-1: wss://us-east-1.mypurecloud.com/api/v2/webchat/conversations
    const wsUrl = `wss://${process.env.GENESYS_REGION}.mypurecloud.com/api/v2/webchat/conversations`;
    
    const token = await getAccessToken();
    const wsClient = new DiagnosticWebSocketClient(wsUrl, token);

    let conversationId = null;

    try {
        await wsClient.connect();
        
        // Simulate a conversation start to get a Conversation ID
        // In a real Webchat client, this is handled by the UI. 
        // We send a standard "start" message.
        const startMessage = {
            type: 'start',
            metadata: {
                userId: 'diag-user-' + Date.now(),
                email: 'diag@example.com',
                name: 'Diagnostic User'
            }
        };
        
        wsClient.ws.send(JSON.stringify(startMessage));
        
        // Wait for the response which usually contains the conversation ID
        // For this diagnostic, we will wait 10 seconds to collect latency data
        console.log('Monitoring for 10 seconds...');
        await new Promise(resolve => setTimeout(resolve, 10000));

        // Extract conversation ID if available (simplified for this example)
        // In a real scenario, you would parse the 'start' response message
        // For now, we assume we might not have a specific ID if we didn't parse the response
        // But for event correlation, we need an ID. 
        // Let's assume we captured it from the first message or use a dummy for the example structure.
        // In production, parse the 'start' response: { type: 'start', conversationId: '...' }
        
        // For this tutorial, we will skip event correlation if no ID is parsed, 
        // but the function is ready.
        
    } catch (error) {
        console.error('WebSocket connection failed:', error.message);
    } finally {
        wsClient.disconnect();
    }

    // 3. Report Results
    console.log('\n--- Step 3: Diagnostic Results ---');
    const stats = wsClient.getStats();
    console.log('Average Latency:', stats.averageLatency);
    console.log('Max Latency:', stats.maxLatency);
    console.log('Total Drops:', stats.drops.length);
    
    if (stats.drops.length > 0) {
        console.log('Drop Details:');
        stats.drops.forEach(drop => {
            console.log(`  - Time: ${drop.timestamp}, Code: ${drop.code}, Reason: ${drop.reason}`);
            
            // If we had a conversation ID, we would call fetchInteractionEvents here
            // await fetchInteractionEvents(conversationId, drop.timestamp, new Date().toISOString());
        });
    } else {
        console.log('No connection drops detected during monitoring.');
    }
}

runDiagnostic().catch(console.error);

Common Errors & Debugging

Error: WebSocket Connection Refused (ECONNREFUSED)

• What causes it: The WebSocket URL is incorrect, or the region is misconfigured. Genesys Cloud regions have distinct WebSocket endpoints.
• How to fix it: Verify the GENESYS_REGION environment variable. Ensure the URL format matches wss://{region}.mypurecloud.com/api/v2/webchat/conversations.
• Code showing the fix:

  // Incorrect
  const wsUrl = 'wss://mypurecloud.com/api/v2/webchat/conversations';
  
  // Correct
  const wsUrl = `wss://${process.env.GENESYS_REGION}.mypurecloud.com/api/v2/webchat/conversations`;
  

Error: 401 Unauthorized on WebSocket

• What causes it: The OAuth token is expired or missing in the WebSocket headers.
• How to fix it: Ensure the getAccessToken function is called immediately before connecting. Implement token refresh logic if the diagnostic runs for longer than the token validity (usually 1 hour).
• Code showing the fix:

  // Refresh token before connect
  const freshToken = await getAccessToken();
  const wsClient = new DiagnosticWebSocketClient(wsUrl, freshToken);
  

Error: High Latency (>1000ms)

• What causes it: Network congestion, Cognigy backend processing delays, or large payload sizes.
• How to fix it:
  1. Check the payload size in the handleMessage method. If payloads are large, consider compressing data in the Cognigy bot.
  2. Verify the Cognigy bot’s execution time. If the bot performs heavy computations, it delays the response, increasing perceived latency.
  3. Check Genesys Cloud status page for regional outages.

Error: WebSocket Close Code 1006 (Abnormal Closure)

• What causes it: The connection was terminated unexpectedly by the server or network. This often indicates a timeout on the Genesys Cloud side due to inactivity or a backend error in the Cognigy integration.
• How to fix it:
  1. Enable keep-alive pings in the WebSocket client.
  2. Check the Cognigy bot logs for errors during the conversation.
  3. Correlate the drop time with Genesys Cloud interaction events using the fetchInteractionEvents function.

Official References

• Genesys Cloud Webchat API Documentation
• Genesys Cloud Bot API Documentation
• Genesys Cloud Analytics Events API
• NICE Cognigy Integration Guide