Pass IDs from POST request to separate endpoint

Question

I'm teaching myself Nodejs and am trying to populate a page with a list of nearby businesses' opening and closing hours from Yelp's API. I created a POST route to my page in Express, calling the Yelp API using the Yelp Fusion client. I am able to gather an array of ids which must be used in another endpoint in order to fetch the hours of operation, however I keep receiving TOO_MANY_REQUESTS_PER_SECOND errors when do this, despite setting the limit in the request.

Server.js

var express = require("express");
var app = express();
var yelp = require("yelp-fusion");
var bodyParser = require("body-parser");

app.use(express.static(__dirname + '/public'));
app.use(bodyParser.urlencoded({extended: true}));
app.set("view engine", "ejs");
let client = yelp.client("API_HIDDEN");

app.get("/", function(req,res){
    res.render("landing");
});

///Initial request made to obtain business ids
app.post("/", function(req, res){
    client.search({
        term: 'cafe',
        location: 'Oakland',
        limit: 20
    }).then(response => {
        var ids = [];
        var businesses = response.jsonBody.businesses;
        var idName = businesses.map(el => {
            ids.push(el.id);
        });

        // request separate endpoint, passing ids from the ```ids```array
        for(var x = 0; x < businesses.length; x++){
            client.business(ids[x]).then(response => {
                console.log(response.jsonBody.hours);
            })}.

        res.render("search");
    }).catch(e => {
        console.log(e);
    });
})

app.listen(3000);

I have tried calling client.businesses[id] both inside and outside a for loop but this resulted in errors too. I am confused on the behaviour of this as I am only making 20 calls, far below the minimum, but also how to possibly pass the ids if not for an array as I have run out of ideas. Thank you in advance for your help.

Answer 1

Spread out the api calls over time.

var delay = 1.1 * 1000; // 1.1 seconds in milliseconds  
for(var x = 0; x < businesses.length; x++){
  setTimeout(function(i){
      client.business(ids[i]).then(response => {
      console.log(response.jsonBody.hours);
      });  
  },delay*x,x);
}