Задержка асинхронных запросов request в Node.js

setTimeout

function scrapeArticleLinks(category) {
    for (var i = 1; i <= category.pages; i++) {
        scrapeArticles(BASE_URL + category.href + '?page=' + i);
    }
}
 
function scrapeArticles(article_url) {
    request(article_url, function(error, response, body) {
        if (!error) {
            console.log(body);
        }
    });
}

function scrapeArticleLinks(category) {
    for (var i = 1; i <= category.pages; i++) {
        //задержка scrapeArticles на 1 секунду
        setTimeout(scrapeArticles(BASE_URL + category.href + '?page=' + i),1000)
    }
}
 
 function scrapeArticles(article_url) {
    request(article_url, function(error, response, body) {
        if (!error) {
            console.log(body);
        }
    });
}

setTimeout(scrapeArticles(BASE_URL + category.href + '?page=' + i), i * 1000)

var q = async.queue(function (page, callback) {
    scrapeArticles(page);
    callback();
}, 2);
 
q.drain = function() {
   console.log('All items have been processed');
}
 
function scrapeArticleLinks(category) {
    for (var i = 1; i <= category.pages; i++) {
        var page = BASE_URL + category.href + '?page=' + i;
        q.push(page, function (err) {
            if (err) {
                console.error('Error while processing ' + page);
            }
        });
    }
}
 
var counter = 0;
 
function scrapeArticles(page) {
    counter++;
    setTimeout(function() {
        request(page, function(error, response, body) {
            if (!error) {
                    console.log(body);
            } else {
                console.error('Error while requesting ' + page);
            }
        });
    }, 1000 * counter);
}

 
scrapeArticles = function(article_url) {
   return new Promise(function(resolve, reject){
    request(article_url, function(error, response, body) {
        if(error) return reject(error)
        resolve(body)
    });
  })
}


process = function(generator){
    var next = generator.next()

    if(!next.done) next.value.then(
       function(data){console.log(data); process(generator)},
       function(error){console.log(error)}
    )
}

process(function*(){
  for(var i = 1; i <= category.pages; i++){
   yield scrapeArticles(BASE_URL + category.href + '?page=' + i)
  }
}())