How to do Axios request from Firebase Cloud Function

Question

I\'ve tried the following in Firebase Cloud Function to do an Axios request but it didn\'t work.

    const functions = require(\'firebase-functions\');
    const         


        

Answer 1

I experienced the same issue. An HTTP request with axios returns the following error message : TypeError: Converting circular structure to JSON

Here is an explanation of what is going on and how to get around this

You can use the following package : https://github.com/moll/json-stringify-safe

I'm not sure about the consistency of this approach and personally went for request-promise, which is heavier than axios but allows straightforward HTTP requests.

Answer 2

I changed data.ip to response.data.ip and added return before the two res.status(... lines and the deployed cloud function works for me using Axios when I try it.

The code I have is

const functions = require('firebase-functions');
const axios = require('axios');
const cors = require('cors')({ origin: true });

exports.checkIP = functions.https.onRequest((req, res) => {
  cors(req, res, () => {
    if (req.method !== "GET") {
      return res.status(401).json({
        message: "Not allowed"
      });
    }

    return axios.get('https://api.ipify.org?format=json')
      .then(response => {
        console.log(response.data);
        return res.status(200).json({
          message: response.data.ip
        })
      })
      .catch(err => {
        return res.status(500).json({
          error: err
        })
      })

  })
});

When I invoke the function I get back a reply like { "message": "127.168.121.130" }