Axios Server Calls Using Express


I am stuck again. Starting another project that I’m probably not going to finish but I know I will get some learning out of it.

Primarily, I wont on my client’s client side of their application. I’m not required to touch a lot of server code at all. I do think all front-end developers should at least understand how to build a simple backend.

About my app

I am building a crime map with advanced details on crime statistics from any zip code. Being able retrieve data on police agencies is my first step to getting the data I need. Right now I am laying out the infrastructure for a scalable and highly interactive application that can be used by the general public and useful to large and small law enforcement agencies.

I will be using Axios and Express for this project’s backend.

Building the Server

When making API calls on the client side, I usually get slammed with a cross-origin-request errors (CORS). There are work arounds to it but I’d rather simplify things by separating the logic.

I am using the env variable to not expose my API key. Our cors() middleware handles or cross-origin-request so that we can get a response successfully from the source.

Creating the endpoint /agencies/agency allows me to retrieve a single police agency based on the ORI number provided by the documentation more safely in an environment I have more control over.

const express = require('express')
const path = require("path");
const app = express()
const axios = require('axios')
const cors = require('cors')
const agencyAPI = require('./lib/agencyApi')


app.get('/agencies/agency', async (req, res) => {
    //req.body.param needed to get the form data from the front to feed to API
    const data = await agencyAPI.getAgency(process.env.DETRTOIT_POLICE_ORI)
    if(data) res.send(