Checks where a shortened url points to

whereto

#!/usr/bin/env groovy 

def url = args[0]
def connection = url.toURL().openConnection()
connection.instanceFollowRedirects = false

if(connection.responseCode in [300, 301]) {
    def redirectsTo = connection.getHeaderField('Location')
    println "Redirects to: $redirectsTo"
} else {
    println "Url not forwarded. [url: $url]"
}