Nuxt Axios Dynamic url - proxy

Question

I manage to learn nuxt by using following tutorial
https://scotch.io/tutorials/implementing-authentication-in-nuxtjs-app
In the tutorial, it show that
axios: {
baseURL: 'http://127.0.0.1:3000/api'
},
it is point to localhost, it is not a problem for my development,
but when come to deployment, how do I change the URL based on the browser URL,
if the system use in LAN, it will be 192.168.8.1:3000/api
if the system use at outside, it will be example.com:3000/api
On the other hand, Currently i using adonuxt (adonis + nuxt), both listen on same port (3000).
In future, I might separate it to server(3333) and client(3000)
Therefore the api links will be
localhost:3333/api
192.168.8.1:3333/api
example.com:3333/api
How do I achieve dynamic api url based on browser and switch port?

Answer 1

You don't need baseURL in nuxt.config.js.
Create a plugins/axios.js file first (Look here) and write like this.
export default function({ $axios }) {
if (process.client) {
const protocol = window.location.protocol
const hostname = window.location.hostname
const port = 8000
const url = `${protocol}//${hostname}:${port}`
$axios.defaults.baseURL = url
}

Answer 2

A late contribution, but this question and answers were helpful for getting to this more concise approach. I've tested it for localhost and deploying to a branch url at Netlify. Tested only with Windows Chrome.
In client mode, windows.location.origin contains what we need for the baseURL.
# /plugins/axios-host.js
export default function ({$axios}) {
if (process.client) {
$axios.defaults.baseURL = window.location.origin
}
}
Add the plugin to nuxt.config.js.
# /nuxt.config.js
...
plugins: [
...,
"~/plugins/axios-host.js",
],
...

Answer 3

This question is a year and a half old now, but I wanted to answer the second part for anyone that would find it helpful, which is doing it on the server-side.
I stored a reference to the server URL that I wanted to call as a Cookie so that the server can determine which URL to use as well. I use cookie-universal-nuxt and just do something simple like $cookies.set('api-server', 'some-server') and then pull the cookie value with $cookies.get('api-server') .. map that cookie value to a URL then you can do something like this using an Axios interceptor:
// plguins/axios.js
const axiosPlugin = ({ store, app: { $axios, $cookies } }) => {
$axios.onRequest ((config) => {
const server = $cookies.get('api-server')
if (server && server === 'some-server') {
config.baseURL = 'https://some-server.com'
}
return config
})
}
Of course you could also store the URL in the cookie itself, but it's probably best to have a whitelist of allowed URLs.
Don't forget to enable the plugin as well.
// nuxt.config.js
plugins: [
'~/plugins/axios',
This covers both the client-side and server-side since the cookie is "universal"