In NodeJs 8.* how do I apply Async / Await on http.get? - node.js

Question

The following code gets the result asyncronously from the specified url, and I would like to return parsed variable out of getData method, after I receive the data, making use of async/await in nodejs version 8.* (without callback function).
function getData(v, r) {
var path = 'http://some.url.com';
var parsed = "";
http.get({
path: path
}, function(res) {
var body = '';
res.on('data', function(chunk) {
body += chunk;
});
res.on('end', function() {
parsed = JSON.parse(body);
// now I would like to return parsed from this function without making use of callback functions, and make use of async/await;
});
}).on('error', function(e) {
console.log("Got error: " + e.message);
});
return parsed;
};
Any help is greatly appriciated.

Answer 1

First off let me say I recommend using the npm package request to deal with http gets, that said.
1.) Use a Promise (await does this in the background)
function getData(v, r) {
var path = 'http://some.url.com';
var parsed = '';
return new Promise((resolve, reject) => {
http.get({
path: path
}, function(res) {
var body = '';
res.on('data', function(chunk) {
body += chunk;
});
res.on('end', function() {
parsed = JSON.parse(body);
resolve(parsed);
});
}).on('error', function(e) {
reject(e.message);
});
});
};
Then usage would be
getData(v, r)
.then(success => console.log(success))
.catch(error => console.log(error))
2.) or callbacks You could pass in a callback as a parameter to getData (i.e. getData(v, r, callback)) then within the body of your function call it via callback(parsed) or callback(error_msg).
Then usage would be:
getData(v, r, result=>console.log(result))
or easier to read maybe:
function callback(res) {
console.log(res)
}
getData(v, r, callback)