Script bindings

Each script type exposes a number of bindings, objects that Identity Cloud injects into the script execution context. The bindings provide a stable way of accessing Identity Cloud functionality, without the need to allowlist Java classes. Scripts are provided with all the bindings for their context at the point of execution.

Find information about context-specific bindings in the documentation for each script type.

Identity Cloud has introduced a next-generation scripting engine that offers several benefits, including enhanced script bindings.

For decision node scripts, the availability and usage of bindings depend on the script engine version of the script: legacy or next-generation. Both versions are described in this section.

The next-generation script engine is only available to the Scripted decision node API.

For information about migrating to the enhanced scripting engine, refer to Migrating to next-generation scripts.

Common bindings

The following bindings are common to many authentication and authorization scripts. Use these bindings to access data and perform script operations such as logging.

Binding Description Further information

Binding	Description	Further information
`httpClient`	Make outbound HTTP calls.	Access HTTP services
`logger`	Write a message to the Identity Cloud debug log.	Log script messages
`scriptName`	Access the name of the running script.	Output script name
`systemEnv`	Reference environment secrets and variables (ESVs) in scripts.	Reference ESVs in scripts

httpClient

Make outbound HTTP calls.

Access HTTP services

logger

Write a message to the Identity Cloud debug log.

Log script messages

scriptName

Access the name of the running script.

Output script name

systemEnv

Reference environment secrets and variables (ESVs) in scripts.

Reference ESVs in scripts

Access HTTP services

Call HTTP services with the httpClient.send method. HTTP client requests are asynchronous, unless you invoke the get() method on the returned object.

Next-generation
Legacy

The httpClient binding uses native JavaScript objects, and behaves like the Fetch API.

To invoke an HTTP request:

ResponseScriptWrapper httpClient.send(String uri, Map requestOptions).get()

Sends a synchronous request to the specified URI with request options. The Map parameter is a native JavaScript object that supports method, headers, token, and body as request options.
ResponseScriptWrapper httpClient.send(String uri).get()

Sends a synchronous GET request with no additional request options.

To access response data:

Map response.formData()
Map response.json()
String response.text()

The following fields provide response status information:

Field Type

headers

Map

ok

boolean

status

integer

statusText

String

The response is similar to Response object behavior.

Field	Type
`headers`	Map
`ok`	boolean
`status`	integer
`statusText`	String

To invoke a synchronous HTTP request:

HTTPClientResponse httpClient.send(Request request).get()

To access response data:
JSON.parse(response.getEntity().getString())

HttpClientResponse methods:

Map<String, String> getCookies()
String getEntity
Map<String, String> getHeaders()
String getReasonPhrase()
Integer getStatusCode()
Boolean hasCookies
Boolean hasHeaders

The following example uses the httpClient binding to send a synchronous authentication request and check for success.

Next-generation
Legacy

// import a library script that handles authentication
var authLib = require("authLib");
// use the library function to get authentication token
var bearerToken = authLib.generateBearer(nodeState);

var requestOptions = {
  method: "POST",
  headers: {
    "Content-Type": "application/json"
  },
  token: bearerToken, // Equivalent to Authorization header
  body: {
    username: "demo"
  }
}

var requestURL = "https://my.auth.server/authenticate";
var response = httpClient.send(requestURL, requestOptions).get();

if (response.status === 200) {
    action.goTo("true");
} else {
    action.goTo("false");
}

var fr = JavaImporter(org.forgerock.openam.auth.node.api.Action);

var requestURL = "https://my.auth.server/authenticate";
var request = new org.forgerock.http.protocol.Request();
request.setUri(requestURL);
request.setMethod("POST");
request.getHeaders().add("Content-Type", "application/json;");
request.getHeaders().add("Authorization", "Bearer abcd-1234");
request.setEntity(JSON.stringify({"username": "demo"}));

var response = httpClient.send(request).get();

var responseCode = response.getStatus().getCode();
if (responseCode === 200) {
    action = fr.Action.goTo("true").build();
} else {
    action = fr.Action.goTo("false").build();
}

The httpclient binding also supports asynchronous requests so that you can perform non-blocking operations, such as recording logging output after the script has completed.

To make an asynchronous request, use the same method signatures to send the request but without calling get() on the returned object:

Next-generation
Legacy

public Promise<ResponseScriptWrapper, HttpClientScriptException> send(String uri)
public Promise<ResponseScriptWrapper, HttpClientScriptException> send(String uri, Map<String, Object> requestOptions)

public Promise<Response, NeverThrowsException> send(Request request)

For example:

Next-generation
Legacy

var requestURL = "https://my.auth.server/audit";
var response = httpClient.send(requestURL).then((response) => {
  if (!response) {
    logger.error("Bad response from " + requestURL);
    return;
  }
  if (response.status != 200) {
    logger.error("Unexpected response: " + response.statusText);
    return;
  }
  logger.debug("Returned from async request");
});
action.goTo("true");

var fr = JavaImporter(
    org.forgerock.http.protocol.Request,
    org.forgerock.http.protocol.Response,
    org.forgerock.openam.auth.node.api.Action);

var request = new fr.Request();
request.setUri("https://my.auth.server/audit");
request.setMethod("GET");

var response = httpClient.send(request).then((response) => {
  if (!response) {
    logger.error("Bad response from " + requestURL);
    return;
  }
  var status = response.getStatus().getCode();

  if (status != 200) {
    logger.error("Unexpected response: " + response.getEntity().getString());
    return;
  }
  logger.message("Returned from async request");
});

action = fr.Action.goTo("true").build();

The httpClient script binding automatically adds the current transaction ID as an HTTP header, X-ForgeRock-TransactionId. This lets you correlate caller and receiver logs when you use httpClient from your journey decision node script to make requests to other ForgeRock products and services.

Log script messages

Write messages to Identity Cloud debug logs by using the logger object.

Scripts that create debug messages have their own logger which is created after the script has executed at least once.

Logger names use the format: scripts.<context>.<script UUID>.(<script name>); for example, `scripts.OIDC_CLAIMS.36863ffb-40ec-48b9-94b1-9a99f71cc3b5.(OIDC Claims Script).

For information about debug logs, refer to Get audit and debug logs.

Next-generation
Legacy

The ScriptedLoggerWrapper is based on the SLF4J logging framework. You can log messages at the following levels:

Trace
Debug (default level for development tenant environments)
Info
Warn (default level for staging and production environments)
Error

var traceEnabled = logger.isTraceEnabled();
logger.trace("Trace with arg {}", arg);
var debugEnabled = logger.isDebugEnabled();
logger.debug("Debug with arg {}", arg);
var infoEnabled = logger.isInfoEnabled();
logger.info("Info with arg {}", arg);
var warnEnabled = logger.isWarnEnabled();
logger.warn("Warn with arg {}", arg);
var errorEnabled = logger.isErrorEnabled();
logger.error("Error with arg {}", arg);

The Debug logger lets you log messages at the following levels:

Message
Warning
Error

var messageEnabled = logger.messageEnabled();
logger.message("Message with arg {}", arg);
var warnEnabled = logger.warningEnabled();
logger.warning("Warn with arg {}", arg);
var errorEnabled = logger.errorEnabled();
logger.error("Error with arg {}", arg);

Output script name

Use the scriptName binding to get the name of the running script as a string.

Next-generation
Legacy

// log current script name
logger.debug("Running script: " + scriptName);

// or use a library script to log script name
var mylib = require('loggingLibrary');
mylib.debug(logger, scriptName);

// log current script name
logger.message("Running script: " + scriptName);

Reference ESVs in scripts

The systemEnv binding, available to all script types, provides the following methods shown with their Java signatures:

String getProperty(String propertyName);
String getProperty(String propertyName, String defaultValue);
<T> T getProperty(String propertyName, String defaultValue, Class<T> returnType);

where:

propertyName refers to an ESV. For details, refer to Introduction to ESVs.

The propertyName always starts with esv.; for example, esv-my-variable.

Make sure the propertyName is specific enough to distinguish it from all other ESVs defined.
defaultValue is a default value to use when no ESV matches propertyName.

The defaultValue must not be null.
returnType is one of the following fully-qualified Java class names:
- java.lang.Boolean
- java.lang.Double
- java.lang.Integer
- java.lang.String
- java.util.List
- java.util.Map

The getProperty(String propertyName) method returns null when the propertyName is not valid.

For example:

var myProperty = systemEnv.getProperty('esv.my.variable');
var myDefault = systemEnv.getProperty('esv.nonexisting.variable', 'defaultValue');
var myDouble = systemEnv.getProperty('esv.double.variable', '0.5', java.lang.Double);
var map = systemEnv.getProperty('esv.map.variable', '{"defaultKey":"defaultValue"}', java.util.Map);