Copy a stream

GroovyHelperCopyStream.groovy

class GroovyHelper {

    /**
     * Copy a stream using a certain buffer size.
     */
    def static copyStream = { from, to, bufKb = 1 ->
        byte[] buf = new byte[bufKb * 1024]
        def len = 0
        while ((len = from.read(buf)) > 0) {
            to.write(buf, 0, len)
        }
        to.close()
        from.close()
    }

}