How to obtain access token from Yelp Fusion API using NodeJS - api

Question

I am trying to obtain the access token for Yelp's API.
Yelp's API documentation:
https://www.yelp.com/developers/documentation/v3/get_started
I keep running into the error below on my terminal:
problem with request: getaddrinfo ENOTFOUND api.yelp.com/oauth2/token api.yelp.com/oauth2/token:80
Here's my NodeJS code (I took a lot of it from the Node Documentation site):
var http = require("http");
var postData = JSON.stringify({
"grant_type": "client_credentials",
"client_id": "<<client id>>",
"client_secret": "<<client secret no.>>"
});
var options = {
hostname: 'api.yelp.com/oauth2/token',
port: 80,
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
'Content-Length': Buffer.byteLength(postData)
}
};
var req = http.request(options, (res) => {
console.log(`STATUS: ${res.statusCode}`);
console.log(`HEADERS: ${JSON.stringify(res.headers)}`);
res.setEncoding('utf8');
res.on('data', (chunk) => {
console.log(`BODY: ${chunk}`);
});
res.on('end', () => {
console.log('No more data in response.');
});
});
req.on('error', (e) => {
console.log(`problem with request: ${e.message}`);
});
// write data to request body
req.write(postData);
req.end();

Answer 1

Two items that caught my eye:
Separate the hostname and the path in your options variable.
The YELP Fusion API is HTTPS, not HTTP. Using HTTP may result in a 302 response (URL Redirection).
var https = require('https');
getYelpAccessCode(function(response) {
var responseData = JSON.parse(response);
if (responseData != null) {
var accessCode = responseData.token_type + " " + responseData.access_token;
}
});
function getYelpAccessCode(callback) {
const postData = querystring.stringify({
'client_id': YELP_CLIENT_ID,
'client_secret': YELP_CLIENT_SECRET
});
const options = {
hostname: 'api.yelp.com',
path: '/oauth2/token',
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
'Content-Length': Buffer.byteLength(postData)
}
};
const req = https.request(options, (res) => {
console.log(`STATUS: ${res.statusCode}`);
console.log(`HEADERS: ${JSON.stringify(res.headers)}`);
var body = '';
res.setEncoding('utf8');
res.on('data', (chunk) => {
body += chunk;
console.log(`BODY: ${chunk}`);
});
res.on('end', () => {
console.log('No more data in response.');
callback(body);
});
});
req.on('error', (e) => {
console.error(`problem with request: ${e.message}`);
});
// write data to request body
req.write(postData);
req.end();
}