Web Services Skill

This skill guides you through implementing web service integrations in B2C Commerce using the Service Framework.

Overview

The Service Framework provides a structured way to call external services with:

Feature	Description
Configuration	Service settings managed in Business Manager
Rate Limiting	Automatic throttling to protect external systems
Circuit Breaker	Automatic failure handling to prevent cascade failures
Logging	Communication logging with sensitive data filtering
Mocking	Test services without external calls

Service Types

Type	Use Case	Protocol
HTTP	REST APIs, webhooks	HTTP/HTTPS
HTTPForm	Form submissions	HTTP/HTTPS with form encoding
FTP	File transfers (deprecated)	FTP
SFTP	Secure file transfers	SFTP
SOAP	SOAP web services	HTTP/HTTPS with SOAP
GENERIC	Custom protocols	Any

Service Framework Components

Business Manager Configuration

Services are configured in Administration > Operations > Services:

1. Service Configuration - General settings (enabled, logging, callbacks)
2. Service Profile - Rate limiting and circuit breaker settings
3. Service Credential - URL and authentication credentials

Script Components

Component	Purpose
LocalServiceRegistry	Creates service instances
ServiceCallback	Defines request/response handling
Service	Base service with common methods
Result	Response object with status and data

Basic Pattern

'use strict';

var LocalServiceRegistry = require('dw/svc/LocalServiceRegistry');

var myService = LocalServiceRegistry.createService('my.service.id', {
    /**
     * Configure the request before it is sent
     * @param {dw.svc.HTTPService} svc - The service instance
     * @param {Object} params - Parameters passed to service.call()
     * @returns {string} Request body
     */
    createRequest: function (svc, params) {
        svc.setRequestMethod('POST');
        svc.addHeader('Content-Type', 'application/json');
        return JSON.stringify(params);
    },

    /**
     * Parse the response after a successful call
     * @param {dw.svc.HTTPService} svc - The service instance
     * @param {dw.net.HTTPClient} client - The HTTP client with response
     * @returns {Object} Parsed response
     */
    parseResponse: function (svc, client) {
        return JSON.parse(client.text);
    },

    /**
     * Filter sensitive data from logs (required for production)
     * @param {string} msg - The message to filter
     * @returns {string} Filtered message
     */
    filterLogMessage: function (msg) {
        return msg.replace(/("api_key"\s*:\s*")[^"]+"/g, '$1***"');
    }
});

// Call the service
var result = myService.call({ key: 'value' });

if (result.ok) {
    var data = result.object;
} else {
    var error = result.errorMessage;
}

Service Callbacks

Callback	Required	Description
createRequest	Yes*	Configure request, return body
parseResponse	Yes*	Parse response, return result object
execute	No	Custom execution logic (replaces default)
initServiceClient	No	Create/configure underlying client
mockCall	No	Return mock response (execute phase only)
mockFull	No	Return mock response (entire call)
filterLogMessage	Recommended	Filter sensitive data from logs
getRequestLogMessage	No	Custom request log message
getResponseLogMessage	No	Custom response log message

*Required unless execute is implemented

Result Object

The call() method returns a dw.svc.Result:

Property	Type	Description
ok	Boolean	True if successful
status	String	"OK", "ERROR", or "SERVICE_UNAVAILABLE"
object	Object	Response from parseResponse
error	Number	Error code (e.g., HTTP status)
errorMessage	String	Error description
unavailableReason	String	Why service is unavailable
mockResult	Boolean	True if from mock callback

Unavailable Reasons

Reason	Description
TIMEOUT	Call timed out
RATE_LIMITED	Rate limit exceeded
CIRCUIT_BROKEN	Circuit breaker open
DISABLED	Service disabled
CONFIG_PROBLEM	Configuration error

Error Handling

var result = myService.call(params);

if (result.ok) {
    return result.object;
}

// Handle different error types
switch (result.status) {
    case 'SERVICE_UNAVAILABLE':
        switch (result.unavailableReason) {
            case 'RATE_LIMITED':
                // Retry later
                break;
            case 'CIRCUIT_BROKEN':
                // Service is down, use fallback
                break;
            case 'TIMEOUT':
                // Request timed out
                break;
        }
        break;
    case 'ERROR':
        // Check HTTP status code
        if (result.error === 401) {
            // Authentication error
        } else if (result.error === 404) {
            // Resource not found
        }
        break;
}

throw new Error('Service error: ' + result.errorMessage);

Log Filtering

Production environments require log filtering to prevent sensitive data exposure:

var myService = LocalServiceRegistry.createService('my.service', {
    createRequest: function (svc, params) {
        // ... configure request
    },

    parseResponse: function (svc, client) {
        return JSON.parse(client.text);
    },

    /**
     * Filter sensitive data from all log messages
     */
    filterLogMessage: function (msg) {
        // Filter API keys
        msg = msg.replace(/api_key=[^&]+/g, 'api_key=***');
        // Filter authorization headers
        msg = msg.replace(/Authorization:\s*[^\r\n]+/gi, 'Authorization: ***');
        // Filter passwords in JSON
        msg = msg.replace(/("password"\s*:\s*")[^"]+"/g, '$1***"');
        return msg;
    },

    /**
     * Custom request log message (optional)
     */
    getRequestLogMessage: function (request) {
        // Return custom message or null for default
        return 'Request: ' + request.substring(0, 100) + '...';
    },

    /**
     * Custom response log message (optional)
     */
    getResponseLogMessage: function (response) {
        // Return custom message or null for default
        return 'Response received';
    }
});

Mocking Services

Use mock callbacks for testing without external calls:

var myService = LocalServiceRegistry.createService('my.service', {
    createRequest: function (svc, params) {
        svc.setRequestMethod('GET');
        svc.addParam('id', params.id);
        return null;
    },

    parseResponse: function (svc, client) {
        return JSON.parse(client.text);
    },

    /**
     * Mock the execute phase only (createRequest and parseResponse still run)
     */
    mockCall: function (svc, request) {
        return {
            statusCode: 200,
            text: JSON.stringify({ id: 1, name: 'Mock Data' })
        };
    },

    /**
     * Or mock the entire call (replaces all phases)
     */
    mockFull: function (svc, params) {
        return { id: params.id, name: 'Full Mock Data' };
    }
});

// Force mock mode
myService.setMock();
var result = myService.call({ id: 123 });

Service Configuration in Business Manager

Creating a Service

1. Go to Administration > Operations > Services
2. Click New under Service Configurations
3. Fill in:
   • Service ID: Unique identifier (e.g., my.api.service)
   • Service Type: HTTP, FTP, SOAP, etc.
   • Enabled: Check to enable
   • Profile: Select or create a profile
   • Credential: Select or create credentials
   • Communication Log: Enable for debugging

Service Profile Settings

Setting	Description
Timeout	Maximum wait time in milliseconds
Rate Limit	Maximum calls per time unit
Circuit Breaker Enabled	Enable automatic failure handling
Max Circuit Breaker Calls	Calls before circuit opens
Circuit Breaker Interval	Time window for tracking failures

Service Credential Settings

Setting	Description
ID	Credential identifier
URL	Base URL for the service
User	Username for authentication
Password	Password for authentication

Detailed References

• HTTP Services - REST API integrations
• FTP/SFTP Services - File transfer operations
• SOAP Services - SOAP web service integrations
• Services XML - Import/export service configurations

Script API Classes

Class	Description
dw.svc.LocalServiceRegistry	Create service instances
dw.svc.Service	Base service class
dw.svc.HTTPService	HTTP service methods
dw.svc.FTPService	FTP/SFTP service methods
dw.svc.SOAPService	SOAP service methods
dw.svc.Result	Service call result
dw.svc.ServiceConfig	Service configuration
dw.svc.ServiceProfile	Rate limit/circuit breaker config
dw.svc.ServiceCredential	Authentication credentials
dw.net.HTTPClient	Underlying HTTP client
dw.net.FTPClient	Underlying FTP client
dw.net.SFTPClient	Underlying SFTP client