Node using Axios with express, I want to wait for Promises

Question

I’m willing to expect the value of one Precedent that is inside another

const URL = 'url da api que eu quero consumir'
const AuthStr = 'meu token'

function GET (){
    axios.get(URL, { headers: { Authorization: AuthStr } })
        .then(response => {
            console.log(response.data);
            return response.data
        })
        .catch((error) => {
            console.log('error ' + error);
        });
};

app.get("/", (request, response) => {
  let data = GET();;
  
  return response.json(data);
})

the problem is that I can’t make the app.get wait for Xios to return JSON

Answer 1

You need to make some modifications to your code

You need to warn that your function is asynchronous, you need to wait for the Axios response (which is asynchronous, and .then and .error are just ways to treat asynchronity) and wait for the GET response in your app.get

So here’s how it’s gonna be:

const URL = 'url da api que eu quero consumir'
const AuthStr = 'meu token'

async function GET (){
    const resposta = await axios.get(URL, { headers: { Authorization: AuthStr } })

    return resposta.data;
};

app.get("/", async (request, response) => {
  let data = await GET();
  
  return response.json(data);
})

When you use ASYNC, you need to warn your entire call stack that you need to wait for the asynchronous call to respond, so in case you make use of await (in the call) and async (in the function itself)

NOTE: Your Return in Sponse is not good for much there, it is returning to nowhere. The server response is basically in Response, in your case Response.json(data)

Answer 2

Hello, from what I understand you could solve as follows:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/funcoes_assincronas

async function GET (){
    cons result = await axios.get(URL, { headers: { Authorization: AuthStr } });
    ...
    restante do código aqui...
};

....