Servicenow HTTP get call failure

[devarakondahk]

I'm working on a ServiceNow custom operation script to fetch the serial number for CIs from an API endpoint. The script successfully makes an HTTP GET request and receives a valid JSON response. However, I encounter an issue while parsing the JSON response.

Here is the script I'm using:

this.httpCall = Packages.com.snc.sw.commands.HttpCallHandler;

var logger = Packages.com.snc.sw.log.DiscoLog.getLogger("IP Phone Get Call");

// Initialize variables

var url = "https://example.com/api/v1/Device/10.199.81.79";

var serial = "";

var phone = "10.199.81.79";

var httpClient = new httpCall();

var ciType = CTX.getAttribute('pattern_cit_id');

var ArrayList = Packages.java.util.ArrayList;

var result = "";

try {

    // Make HTTP GET request

    logger.info("Making HTTP GET request to URL: " + url);

    var response = httpClient.invoke(CTX, url, 'GET', null, null, ciType, $headers, $required_authentication);

    if (response) {

        var responseBody = response.getBody();

        logger.info("HTTP Response Body: " + responseBody);

        if (JSUtil.notNil(responseBody)) {

            try {

                var jsonResponse = JSON.parse(responseBody);

                logger.info("Parsed JSON Response: " + JSON.stringify(jsonResponse));

                // Extract serial number from JSON response

                serial = jsonResponse.serial;

                result = phone + "," + serial + "\n";

            } catch (parseEx) {

                logger.error("Error parsing JSON response for IP address " + phone + ": " + parseEx.message);

                result = phone + ",\n";

            }

        } else {

            logger.error("Response body is null or empty for IP address " + phone);

            result = phone + ",\n";

        }

    } else {

        logger.error("Response is null for IP address " + phone);

        result = phone + ",\n";

    }

} catch (ex) {

    // Handle any exceptions during HTTP request

    logger.error("Error occurred for IP address " + phone + ": " + ex.message);

    result = phone + ",\n";

}

// Set the result in the context attribute

CTX.setAttribute('response', result);

The log shows the response body correctly, but the script still throws an error when attempting to parse the JSON. Here is the log output:

HTTP response: {"name":"DM","ipAddress":"10.199.81.79","serial":"FOC2739J0U1"}

Error parsing JSON response for IP address 10.199.81.79: undefined

Can someone help me understand why the JSON parsing is failing even though the response looks correct? Any advice or suggestions would be greatly appreciated.

note:- Here i have hardcoded one ip address for testing but later i will send a array of ip address to hit url one by one with each ip and save the serial number