Serverside javascript helpers

This article describes the server-side destination APIs.

decodeURI

Decodes any encoded characters in the provided URI. Returns a string that represents the decoded URI. Returns undefined when provided with invalid input.

Syntax

decodeUri(encoded_uri);

Example

const decodeUri = require('decodeUri');

const decodedUrl = decodeUri(data.encodedUrl);
if (decodedUrl) {
  // ...
}

Parameter	Type	Description
encoded_uri	string	A URI that has been encoded by encodeUri() or by other means.

decodeUriComponent

Decodes any encoded characters in the provided URI component. Returns a string that represents the decoded URI component. Returns undefined when given invalid input.

Syntax

decodeUriComponent(encoded_uri_component);

Example

const decodeUriComponent = require('decodeUriComponent');

const decodedQuery = decodeUriComponent(data.query);
if (decodedQuery) {
  // ...
}

Parameter	Type	Description
encoded_uri_component	string	A URI component that has been encoded by encodeUriComponent() or by other means.

encodeUri

Returns an encoded Uniform Resource Identifier (URI) by escaping special characters. Returns a string that represents the provided string encoded as a URI.

Syntax

encodeUri(uri);

Example

const encodeUri = require('encodeUri');
const sendHttpGet = require('sendHttpGet');

sendHttpGet('https://www.example.com/' + encodeUri(pathInput));

Parameter	Type	Description
uri	string	A complete URI.

encodeUriComponent

Returns an encoded Uniform Resource Identifier (URI) by escaping special characters. Returns a string that represents the provided string encoded as a URI.

Syntax

encodeUriComponent(str);

Example

const encodeUriComponent = require('encodeUriComponent');
const sendHttpGet = require('sendHttpGet');

sendHttpGet('https://www.example.com/?' + encodeUriComponent(queryInput));

Parameter	Type	Description
str	string	A component of a URI.

fromBase64

Decodes a base64-encoded string. Returns undefined if the input is invalid.

Syntax

fromBase64(base64EncodedString);

Example

const fromBase64 = require('fromBase64');

const greeting = fromBase64('aGVsbG8=');
if (greeting === 'hello') {
  // ...
}

Parameter	Type	Description
base64EncodedString	string	Base64 encoded string.

generateRandom

Returns a random number (integer) within the given range.

Syntax

generateRandom(min, max);

Example

const generateRandom = require('generateRandom');

const randomValue = generateRandom(0, 10000000);

Parameter	Type	Description
min	number	Minimum potential value of the returned integer (inclusive).
max	number	Maximum potential value of the returned integer (inclusive).

getAllEventData

Returns a copy of the event data.

Syntax

getAllEventData();

Usage Example

const getAllEventData= require('getAllEventData');
const eventModel = getAllEventData();
//build body request from event properties 
const body = {
    crm_id:eventModel.user.id,
    currency:eventModel.currency
};

Notice that the event data may contains more properties that what you sent initially because of system properties that are added automatically on web events and app sdk events.

Data example:

If you send this web event:

cact('trigger', 'search', {
  "search_term": "blue t-shirt",
  "user": {
    "id": "12345",
    "email": "[e-mail]",
    "consent_categories": ["1","3"]
  }
);

Then the getAllEventData() function will return this object:

{
   "event_name": "search",
   "search_term": "blue t-shirt",
   "user": {
      "id": "12345",
      "email": "[e-mail]",
      "consent_categories": ["1","3"]
   },
   "url": "https://www.mywebsite.com/path1/path2/", //Automatically added if missing
   "path": "/path1/path2/", //Automatically added
   "referrer": "https:///www.google.fr", //Automatically added
   "title": "My page title", //Automatically added if missing
   "context": {
      "event_id": "202110130000000000", //Automatically added
      "generatorVersion": "10.0", //Automatically added
      "containerVersion": "3.1", //Automatically added
      "event_timestamp": "1639044446636", //Automatically added
      "page": { //Automatically added
         "title": "Search page", //Automatically added
         "url": "https://shop.com/search?q=...", //Automatically added
         "lang": "en", //Automatically added
         "referrer": "https:///www.google.fr", //Automatically added
         "viewport": { //Automatically added
            "width": 320, //Automatically added
            "height": 568 //Automatically added
         }
      },
      "device": { //Automatically added
         "user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36",//Automatically added
         "ip": "102.3.4.56",//Automatically copied from the request header
         "lang": "fr",//Automatically added
         "cookie": "_fbp=123; _fbc=456; _ga=789",//Automatically added
         "timezone": "Europe/Paris"//Automatically added
      }
   }
}

getCookieValues

Returns an array containing the values of all cookies with the given name.

Syntax

getCookieValues(name[, noDecode]);

Example

const getCookieValues = require('getCookieValues');
const facebook_fbp = getCookieValues('fbp')[0];
if (facebook_fbp ) {  // ...}

---

Parameters

Parameter	Type	Description
name	string	Name of the cookie.
noDecode	boolean	If true, the cookie values will not be decoded before being returned. Defaults to false.

getEventData

Returns a copy of the value at the given path in the event data. Returns undefined if there is no event data or if there is no value at the given path.

Syntax

getEventData(keyPath);

Example

const getEventData = require('getEventData');

const campaignId = getEventData('campaign.id');
const itemId = getEventData('items.0.id');
const referrer = getEventData('page_referrer');

Parameters

Parameter	Type	Description
keyPath	any	The path of the key, where path components are separated by dots. The path components can be keys in an object or indices in an array. If keyPath is not a string, it is coerced into a string.

getRemoteAddress

Returns a string representation of the IP address where the request originated, e.g. 62.123.65.780 for IPv4 or 2001:0db8:85a3:0:0:8a2e:0370:1234 for IPv6

Syntax

getRemoteAddress();

getTimestamp

Deprecated. Prefer getTimestampMillis.

Returns a number that represents the current time in milliseconds since Unix epoch, as returned by Date.now().

Syntax

getTimestamp();

getTimestampMillis

Returns a number that represents the current time in milliseconds since Unix epoch, as returned by Date.now().

Syntax

getTimestampMillis();

getType

Returns a string describing the given value's type.

Input Type	Returned Value
string	'string'
number	'number'
boolean	'boolean'
null	'null'
undefined	'undefined'
Array	'array'
Object	'object'
Function	'function'

Syntax

getType(value);

Example

const getType = require('getType');

const type = getType(value);
if (type === 'string') {
  // Handle string input.
} else if (type === 'number') {
  // Handle numeric input.
} else {
  logToConsole('Unsupported input type: ', type);
}

Parameters

Parameter	Type	Description
value	any	Input value.

logToConsole

Logs its argument(s) to the console.

These logs are visible within Destination Builder's console.

Example

const logToConsole = require('logToConsole');

const product_color= "red";
const product_price= 10;
logToConsole('color is: ', product_color, ' and price is: ', product_price);

Syntax

logToConsole(argument1[, argument2, ...]);

Parameters

The function takes one or more arguments, each of which is converted to a string, if necessary, and logged to the console.

makeInteger

Converts the given value to a number (integer).

Syntax

makeInteger(value);

Parameters

Parameter	Type	Description
value	any type	The value to convert.

makeNumber

Converts the given value to a number.

Syntax

makeNumber(value);

Parameters

Parameter	Type	Description
value	any type	The value to convert.

makeString

Returns the given value as a string.

Syntax

makeString(value);

Parameters

Parameter	Type	Description
value	any type	The value to convert.

parseUrl

Returns an object that contains all of a given URL's component parts, similar to the URL object.

This API will return undefined for any malformed URL. For properly formatted URLs, fields not present in the URL string will have a value of an empty string, or in the case of searchParams, an empty object.

The returned object will have the following fields:

{  
    href: string,  
    origin: string, 
    protocol: string,  
    username: string,  
    password: string,  
    host: string,  
    hostname: string,  
    port: string,  
    pathname: string,  
    search: string,  
    searchParams: Object<string, (string|Array)>,  
    hash: string,
}

Syntax

parseUrl(url);

Example

const parseUrl = require('parseUrl');const urlObject = parseUrl('https://abc:[e-mail]:8080/foo?param=val%2Cue#bar');

Parameters

Parameter	Type	Description
url	string	The full url that will be parsed.

sha256

Calculates the SHA-256 digest of the input and invokes a callback with the digest encoded in base64, unless the options object specifies a different output encoding.

This API signature and behavior matches the sha256 API for web containers; however, Custom Templates in server containers should use the sha256Sync API for simpler code.

Syntax

sha256(input, onSuccess, options = undefined);

Example

const encodeUriComponent = require('encodeUriComponent');const sendHttpGet = require('sendHttpGet');const sha256 = require('sha256');sha256('inputString', (digest) => {  sendHttpGet('https://example.com/collect?id=' + encodeUriComponent(digest));});sha256('inputString', (digest) => {  sendHttpGet('https://example.com/collect?id=' + encodeUriComponent(digest));}, {outputEncoding: 'hex'});

Parameters

Parameter	Type	Description
input	string	The string to hash.
onSuccess	function	Called with the resulting digest, encoded in base64, unless the options object specifies a different output encoding.
options	object	Optional options object to specify the output encoding. If specified, the object should contain the key outputEncoding with value as one of base64 or hex.

sha256Sync

Calculates and returns the SHA-256 digest of the input, encoded in base64, unless the options object specifies a different output encoding.

Syntax

sha256Sync(input, options = undefined);

Example

const encodeUriComponent = require('encodeUriComponent');const sendHttpGet = require('sendHttpGet');const sha256Sync = require('sha256Sync');const digestBase64 = sha256Sync('inputString');const digestHex = sha256Sync('inputString', {outputEncoding: 'hex'});sendHttpGet('https://example.com/collect?id=' + encodeUriComponent(digestBase64));sendHttpGet('https://example.com/collect?id=' + encodeUriComponent(digestHex));

Parameters

Parameter	Type	Description
input	string	The string to hash.
options	object	Optional options object to specify the output encoding. If specified, the object should contain the key outputEncoding with value as one of base64 or hex.

toBase64

Encodes a string as base64.

Syntax

toBase64(input);

Example

const toBase64 = require('toBase64');const base64Hello = toBase64('hello');

Parameters

Parameter	Type	Description
input	string	String to encode.

JSON

Returns an object that provides JSON functions.

The parse() function parses a JSON string to construct the value or object described by the string. If the value cannot be parsed (malformed JSON), the function will return undefined. If the input value is not a string, the input will be coerced to a string.

The stringify() function converts the input into a JSON string. If the value cannot be parsed (ex. the object has a cycle), the method will return undefined.

Syntax

JSON.parse(yourString);
JSON.stringify(yourObject);

Example

const JSON = require('JSON');
// The JSON input string is converted to an object.
const object = JSON.parse('{"foo":"bar"}');
// The input object is converted to a JSON string.
const str = JSON.stringify({foo: 'bar'});

---

Math

An object providing Math functions.

Syntax

const Math = require('Math');
// Retrieve the absolute value.
const absolute = Math.abs(-5);
// Round the input down to the nearest integer.
const roundedDown = Math.floor(4.6);
// Round the input up to the nearest integer.
const roundedUp = Math.ceil(2.1);
// Round the input to the nearest integer.
const rounded = Math.round(4.2);
// Return the largest argument.
const biggest = Math.max(1, 4);
// Return the smallest argument.
const smallest = Math.min(4, 5);
// Return the first argument raised to the power of the second argument.
const powerful = Math.pow(4, 2);
// Return the square root of the argument.
const unsquared = Math.sqrt(81);

Parameters

Math function parameters are converted to numbers.

sendHttpGet

Makes an HTTP GET request to the specified URL, and invokes a callback with the response once the request completes or times out.

Syntax

sendHttpGet(url[, callback[, options]]);

Example

const sendHttpGet = require('sendHttpGet');
// Sends a GET request and nominates response// based on the response from the GET 
sendHttpGet('https://example.com/collect', function(statusCode, headers, body) {
    if (statusCode != 200) {yourCallbackFunction();}
}, {
    headers: {key: 'value'},
    timeout: 500
});

Parameters

Parameter	Type	Description
url	string	The request URL.
callback	function	An optional callback to invoke upon request completion, error, or timeout. It is invoked with the response status code, the response headers, and the response body (or undefined if there was no response body). If the request failed (e.g. invalid URL, no route to host, SSL negotiation failure, etc.), the callback will be invoked with a response status code of zero, no headers, and an undefined body. If the 'timeout' option was set and the request timed out, the callback will be invoked with a response status code of -1, no headers, and an undefined body.
options	object	Optional request options. The supported options are headers, timeout. Advanced options can be added in extraOptions

Options

• headers: Additional request headers represented as an object.

• timeout: The timeout, in milliseconds, before the request is aborted.

• extraOptions: Advanced options (ex: {strictSSL:true})

sendHttpRequest

Makes an HTTP request to the specified URL, and invokes a callback with the response once the request completes or times out.

Syntax

sendHttpRequest(url[, callback[, options[, body]]]);

Example

const sendHttpRequest = require('sendHttpRequest');
const body = {
    user_type:'vip',
    account:'123'
};
// Sends a POST request 
sendHttpRequest('https://example.com/collect', function(statusCode, headers, body) {
    //your callback code...
}, {
    headers: {
        token: '123456789'
    },
    method: 'POST',
    timeout: 1000
},  JSON.stringify(body));

Parameters

Parameter	Type	Description
url	string	The request URL.
callback	function	An optional callback to invoke upon request completion, error, or timeout. It is invoked with the response status code, the response headers, and the response body (or undefined if there was no response body). If the request failed (e.g. invalid URL, no route to host, SSL negotiation failure, etc.), the callback will be invoked with a response status code of zero, no headers, and an undefined body. If the 'timeout' option was set and the request timed out, the callback will be invoked with a response status code of -1, no headers, and an undefined body.
options	object	Optional request options. The supported options are: headers, method, and timeout. Unknown option keys are ignored. Advanced options can be added in extraOptions.
body	string	Optional request body.

Options

• headers: Additional request headers.

• method: The request method, defaults to 'GET'.

• timeout: The timeout, in milliseconds, before the request is aborted.

• extraOptions: Advanced options (ex: {strictSSL:true})

md5Sync

Calculates and returns the md5 digest of the input.

Syntax

md5Sync(input);

Example

const md5Sync= require('md5Sync');
const email = {};
email.md5 = md5Sync(user.user_email);
sendHttpGet('https://example.com/collect?e5=' + email.md5);

templateDataStorage

The templateDataStorage helper allows temporary storage and retrieval of data, such as API tokens, during script execution. It is particularly useful for caching reusable data to reduce redundant API calls. Data stored in templateDataStorage persists on the server running the template. Since templates execute on multiple servers, and each server may have multiple instances, stored data is not guaranteed to be accessible for all subsequent template execution.

Syntax

templateDataStorage.setItemCopy(key, value);
templateDataStorage.getItemCopy(key);
templateDataStorage.removeItemCopy(key);

Example: Managing API Tokens

const sendHttpRequest = require('sendHttpRequest');
const templateDataStorage = require('templateDataStorage');

const tokenKey = 'apiToken';

function fetchNewToken(callback) {
  sendHttpRequest('https://example.com/api/token', function (status, _, body) {
    if (status === 200) {
      const { accessToken, expiresIn } = JSON.parse(body);
      const tokenData = { token: accessToken, expiry: Date.now() + expiresIn * 1000 };
      templateDataStorage.setItemCopy(tokenKey, tokenData);
      callback(accessToken);
    } else {
      callback(null);
    }
  }, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ clientId: 'id', clientSecret: 'secret' }) });
}

function sendEvent(eventData) {
  const cachedToken = templateDataStorage.getItemCopy(tokenKey);
  const token = cachedToken && cachedToken.expiry > Date.now() ? cachedToken.token : null;

  sendHttpRequest('https://example.com/api/events', function (status) {
    if (status === 401) {
      fetchNewToken(function (newToken) {
        if (newToken) {
          sendHttpRequest('https://example.com/api/events', () => {}, { method: 'POST', headers: { Authorization: `Bearer ${newToken}` }, body: JSON.stringify(eventData) });
        }
      });
    }
  }, { method: 'POST', headers: { Authorization: `Bearer ${token}` }, body: JSON.stringify(eventData) });
}

sendEvent({ eventName: 'purchase', value: 100 });

Method	Description
setItemCopy(key, value)	Stores a value under the specified key. Overwrites the value if the key already exists.
getItemCopy(key)	Retrieves the value associated with the specified key. Returns undefined if the key does not exist.
removeItemCopy(key)	Deletes the value associated with the specified key.

Parameter	Type	Description
key	string	The unique identifier for the data to be stored/retrieved.
value	any	The data to be stored (for setItemCopy).