Regex get string between 2 words

ParseWord.groovy

   String regex = "(?<=GET ).*(?=\\ HTTP)";
        Pattern pattern = Pattern.compile(regex);
        new File("src/main/resources/access.log.2019-01-18.log").readLines().each { line ->
            def matcher = pattern.matcher(line)
            if (matcher.find()){
                matcher.group(0)
            }
        }