NodeJS using request inside a loop - node.js

Question

I use NodeJS and request lib to make some request to an API.
I understand now that all requests are async and so it doesn't "wait" the result of the GET call, so the index of my Loop is always the same.
I was wondering if there was any simple way (without any lib) to wait for the response of the request call ?
For now, my code is this :
for (var i in entries) {
var entryId = entries[i]['id'];
var options = {
url: 'https://api.com/'+ entryId +'/get/status',
method: 'GET',
headers: {
'Authorization': auth
}
};
console.log(' ENTRY ID > '+ entryId);
request(options, function(error, response, body) {
var response = JSON.parse(body);
if (response.status.code == 200) {
var id = response.status.id;
var data = [];
data['id'] = id;
data = JSON.stringify(data);
// show first entryId of loop
console.log(' > MY ID : '+ id + ' - '+ entryId);
options = {
host: hostname,
port: 80,
path: '/path/function2',
method: 'PUT'
};
var post = http.request(options, function(json) {
var body = '';
json.on('data', function(d) {
body += d;
});
json.on('end', function() {
console.log('> DONE');
});
}).on('error', function(e) {
console.log(e);
});
post.write(data);
post.end();
}
});
}

Answer 1

You are looking for async/await.
Wrap your logic inside an async function, then you can await for the promise to resolve.
const request = require('request-promise')
async function foo (a) {
for (i in a)
try {
let a = await request('localhost:8080/')
// a contains your response data.
} catch (e) {
console.error(e)
}
}
foo([/*data*/])
Just use the promisified version of request module.

Answer 2

You also can use Promises to wait for your async code to finish.
function asyncCode(msg, cb){
setTimeout(function() {cb(msg);}, 1000);
}
var p1 = new Promises(function(resolve){
asyncCode("my asyncCode is running", resolve);
});
p1.then(function(msg) {
console.log(msg);
}).then(function() {
console.log("Hey I'm next");
});
console.log("SyncCode, Async code are waiting until I'm finished");