Jenkins dynamic Extended Choice Parameter with service call (Groovy Script)

Choose Source for Default Value.groovy

// host will be passed in the groovy bindings for extended choice plugin.

def getVersion = { host, path ->
    try {
        def version = new groovy.json.JsonSlurper().parse(new URL("https://${host}${path}")).version
        return version
    } catch(Exception e) {
        return null
    }
}

String version = getVersion(host, "/version")

if(version == null) {
    version = getVersion(host, "/info")
}

return version ?: 'RELEASE'

Choose Source for Value.groovy

def version = new groovy.json.JsonSlurper().parse(new URL("https://test.xxxx.com/info")).version
return [version]

// also set Default value if this failed