Script bindings

Each script type exposes a number of bindings, objects that AM injects into the script execution context. The bindings provide a stable way of accessing AM 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.

AM 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 AM 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 substituted properties in scripts

httpClient

Make outbound HTTP calls.

Access HTTP services

logger

Write a message to the AM 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 substituted properties 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

This 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 AM 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 Debug logging.

Next-generation
Legacy

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

Trace
Debug
Info
Warn
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 substituted properties in scripts

The systemEnv binding, available to all script types, includes an instance of the ScriptPropertyResolver class. This interface exposes the following methods:

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

where:

propertyName refers to a configuration expression (without the ampersand or braces)

To reference a substituted property in a script, the property name must include a specific prefix; for example, script.my.variable. This prefix decreases the risk that random property values are resolved in scripts.

The default prefix for all script types, is script. To change the prefix, go to Configure > Global Services > Scripting > Secondary Configurations > [.var]#Script Type > Secondary Configurations > Engine Configuration > Property Name Prefix#.

Make sure propertyName is specific enough to distinguish it from other configuration expressions.
defaultValue is the default value set for that property in the configuration expression

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:

The following example assumes that the property name prefix is set to script in the script engine configuration for the script type.

The script is used in a Scripted Decision node to get the values such as the user’s email, hostname, and port. The script also shows type transformation where the type isn’t a string.

JavaScript
Groovy

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

// Properties should get resolved (set in AM)
var email = systemEnv.getProperty('script.tree.decision.node.email');
var name = systemEnv.getProperty('script.tree.decision.node.hostname', 'defaultHostname');
var port = systemEnv.getProperty('script.tree.decision.node.port', '587', java.lang.Integer);
var double = systemEnv.getProperty('script.tree.decision.node.double, '2.0', java.lang.Double);
var hasPort = systemEnv.getProperty('script.tree.decision.node.hasPort', 'false', java.lang.Boolean);
var map = systemEnv.getProperty('script.tree.decision.node.map', '{"defaultKey":"defaultValue"}', java.util.Map);
var list = systemEnv.getProperty('script.tree.decision.node.list', 'defaultValue', java.util.List);

// Properties should get resolved to their defaults (not set in AM)
var defaultName = systemEnv.getProperty('script.tree.decision.node.hostname.unresolved', 'defaultHostname');
var defaultPort = systemEnv.getProperty('script.tree.decision.node.port.unresolved', '587', java.lang.Integer);
var defaultDouble = systemEnv.getProperty('script.tree.decision.node.double.unresolved', '2.0', java.lang.Double);
var defaultHasPort = systemEnv.getProperty('script.tree.decision.node.hasPort.unresolved', 'false', java.lang.Boolean);
var defaultMap = systemEnv.getProperty('script.tree.decision.node.map.unresolved', '{"defaultKey":"defaultValue"}', java.util.Map);
var defaultList = systemEnv.getProperty('script.tree.decision.node.list.unresolved', 'defaultFirstValue,defaultSecondValue', java.util.List);

// Assert all property values - set the appropriate outcome
if (email === 'test@example.com' && name === 'testHostname' && port === 25 && double === 1.0 && hasPort === true
    && map.get('testKey') == 'testValue' && list == '[testFirstValue, testSecondValue]'
    && defaultName === 'defaultHostname' && defaultPort === 587 && defaultDouble === 2.0 && defaultHasPort === false
    && defaultMap.get('defaultKey') == 'defaultValue' && defaultList == '[defaultFirstValue, defaultSecondValue]') {
  action = fr.Action.goTo("true").build();
} else {
  action = fr.Action.goTo("false").build();
}

// Properties should get resolved (set in AM)
String email = systemEnv.getProperty('script.tree.decision.node.email');
String name = systemEnv.getProperty('script.tree.decision.node.hostname', 'defaultHostname');
Integer port = systemEnv.getProperty('script.tree.decision.node.port', '587', java.lang.Integer);
Double testDouble = systemEnv.getProperty('script.tree.decision.node.double', '2.0', java.lang.Double);
Boolean hasPort = systemEnv.getProperty('script.tree.decision.node.hasPort', 'false', java.lang.Boolean);
Map map = systemEnv.getProperty('script.tree.decision.node.map', '{\"defaultKey\":\"defaultValue\"}', java.util.Map);
List list = systemEnv.getProperty('script.tree.decision.node.list', 'defaultValue', java.util.List);

// Properties should get resolved to their defaults (not set in AM)
String defaultName = systemEnv.getProperty('script.tree.decision.node.hostname.unresolved', 'defaultHostname');
Integer defaultPort = systemEnv.getProperty('script.tree.decision.node.port.unresolved', '587', java.lang.Integer);
Double defaultDouble = systemEnv.getProperty('script.tree.decision.node.double.unresolved', '2.0', java.lang.Double);
Boolean defaultHasPort = systemEnv.getProperty('script.tree.decision.node.hasPort.unresolved', 'false', java.lang.Boolean);
Map defaultMap = systemEnv.getProperty('script.tree.decision.node.map.unresolved', '{\"defaultKey\":\"defaultValue\"}', java.util.Map);
List defaultList = systemEnv.getProperty('script.tree.decision.node.list.unresolved', 'defaultFirstValue,defaultSecondValue', java.util.List);

// Assert all property values - set the appropriate outcome
if (email.equals('test@example.com') && name.equals('testHostname') && port == 25 && testDouble == 1.0d && hasPort == true
    && defaultName.equals('defaultHostname') && defaultPort == 587 && defaultDouble == 2.0d && defaultHasPort == false
    && map.get('testKey').equals('testValue')
    && list.get(0).equals('testFirstValue') && list.get(1).equals('testSecondValue')
    && defaultMap.get('defaultKey').equals('defaultValue')
    && defaultList.get(0).equals('defaultFirstValue') && defaultList.get(1).equals('defaultSecondValue')) {

    outcome = 'true';
} else {
    outcome = 'false';
}

AM 7.4.0

Script bindings

Common bindings

Access HTTP services

Log script messages

Output script name

Reference substituted properties in scripts