Jenkins Groovy function to check URL availability

check-url.groovy

#!/usr/bin/env groovy

/**
 * Checks URL availability via curl
 * @author thabet.amer@gmail.com
 * @since Jenkins 2.204.1
 * @param String url
 * @return String Zero if succeeded, error if not.
 *
 */

def curlstatus(String url) {
    assert url != null
    int status = sh(label: 'Check URL',
                    returnStdout: true,
                    script: "curl -sLI -w '%{http_code}' ${url} -o /dev/null"
                )
    if (status != 200) {
        return "Returned status code = ${status} when calling ${url}"
    }
    return 0
}