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 // Default return value.
var activate = false;

// Check whether the cookie "_idp_krbspnego_enabledautologin" is set.
var cookies = custom.getCookies();
for (var i = 0; i < cookies.length; i++) {
    var cookie = cookies[i];
    if (cookie.getName() == "_idp_krbspnego_enabledautologin" && cookie.getValue != null && cookie.getValue() == "true") {
        activate = true;
    }
}

// Return the result.
activate;

<bean id="shibboleth.SPNEGO.ActivationCondition" parent="shibboleth.Conditions.Scripted" factory-method="inlineScript"
		p:customObject-ref="shibboleth.HttpServletRequest">
    <constructor-arg>
        <value>
            <![CDATA[
                // This script activates SPNEGO if the client is part
                // of the network 192.168.42.0/24, the user agent's
                // identifier string contains the term "Kerberos",
                // or the cookie "_idp_krbspnego_enabledautologin" is set to "true".

                // Create logger object. (Syntax for Java 1.8/Nashorn.)
				var logger = Java.type("org.slf4j.LoggerFactory").getLogger("shibboleth.SPNEGO.ActivationCondition");
				// For Java 1.7 do this instead:
				// importPackage(Packages.org.slf4j);
				// logger = LoggerFactory.getLogger("shibboleth.SPNEGO.ActivationCondition");

                // Default return value.
                var activate = false;

                // Make HTTPServletRequest object known as "request".
                var request = custom;

                // Check the client's IP address.
                if (request.remoteAddr.startsWith("192.168.42.")) {
                    logger.debug("Activating SPNEGO for client in network 192.168.42.0/24.");
                    activate = true;
                }

                if (!activate) {
                    // Check the user agent's identifier string.
                    var identifier = request.getHeader("User-Agent");
                    if (identifier != null && identifier.match(/Kerberos/)) {
                        logger.debug("Activating SPNEGO for client with term 'Kerberos' in user agent's identifier string.");
                        activate = true;
                    }
                }

                if (!activate) {
                    // Check whether the cookie "_idp_krbspnego_enabledautologin" is set.
                    var cookies = request.getCookies();
                    for (var i = 0; i < cookies.length; i++) {
                        var cookie = cookies[i];
                        if (cookie.getName() == "_idp_krbspnego_enabledautologin" && cookie.getValue != null && cookie.getValue() == "true") {
                            logger.debug("Activating SPNEGO for client having cookie '_idp_krbspnego_enabledautologin' set to 'true'.");
                            activate = true;
                        }
                    }
                }

                // Return the result.
                activate;
            ]]>
        </value>
    </constructor-arg>
</bean>