nodejs 3a good way to write multiple api calls in serial

1  var request = require('request');
2
3  request('http://www.test.com/api1', function (error, response, body) {
4    if (!error && response.statusCode == 200) {
5
6      request('http://www.test.com/api1', function (error, response, body) {
7        if (!error && response.statusCode == 200) {
8
9          request('http://www.test.com/api1', function (error, response, body) {
10            if (!error && response.statusCode == 200) {
11
12              //And so on...
13
14            }
15          })
16
17        }
18      })
19
20    }
21  })
22
23
24//2 Next Solution
25Depending on which version of node you are using, promises should be native...
26
27https://nodejs.org/en/blog/release/v4.0.0/
28
29https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise
30
31var request = require('request');
32
33getRequest('http://www.test.com/api1').then(function (body1) {
34    // do something with body1
35    return getRequest('http://www.test.com/api2');
36}).then(function (body2) {
37    // do something with body2
38    return getRequest('http://www.test.com/api3');
39}).then(function (body3) {
40    // do something with body3
41    //And so on...
42});
43
44function getRequest(url) {
45    return new Promise(function (success, failure) {
46        request(url, function (error, response, body) {
47            if (!error && response.statusCode == 200) {
48                success(body);
49            } else {
50                failure(error);
51            }
52        });
53    });
54}