amazon customer reviews apex spider

.cls

List<String> targetList = new List<String>{'B01LR7151C','B06XY77N5N','B072J83YSM','B019YHGHX8','B01K5BTJH8','B01GIIVF6K','B003F6WENW','B0027TEADK','B012PJVQ7Y','B01IG0E1F0','B0072V6MIO','B0727TW22T','B01G7UJIVI','B01AIW6KZS','B00MH78O0M','B0756T5CD4'};

for(String target: targetList){
    HttpRequest req = new HttpRequest();
    Http http = new Http();

    req.setEndpoint('https://www.amazon.com/product-reviews/'+target);
    req.setMethod('GET');
    // req.setBody('{}');

    HttpResponse res = http.send(req); 

    String result = res.getBody().substringBetween('totalReviewCount">', ' out of 5 stars');

    // System.debug(LoggingLevel.INFO, '*** : ' + result);

    System.debug(LoggingLevel.INFO, '*** ' + target + ': ' + result.replaceAll('([0-9,]+).+class="arp-rating-out-of-text">([0-9.]+)', '$1 $2'));
}