Asynchronous functions within the next context

Question

Asynchronous functions within the next context

Hello there! I am trying to send the client's IP address from the frontend in a Next.js application to the backend.

To retrieve the IP, I am using the following function:

    async function getIP() {
        var clientIP = await publicIp.v4();
        return clientIP;
    }
    export default getIP;

and then sending it using axios post.

    getIP().then(ipAddress => {
       axios.post('/api/ip', {

                body: ipAddress

            }). then((res) => {}...}

The server is able to display the IP address in the console, but...

var receivedIP = req.body;
  console.log(receivedIP); // ***undefined***

javascript asynchronous axios next.js

Answer 1

Answer №1

It is important to note that when dealing with an asynchronous function, you are not receiving a string directly; instead, you are getting a promise of a string, which essentially means it's a promise for the data.

The data contained within the promise can only be accessed once the promise has been resolved.

function getIpSomehow() {
  return new Promise(res => {
      setTimeout(() => {
          res("127.0.0.1")
        },500)}
      )
  }
async function getIp() {
    //var c = await publicIp.v4();
    const c = await getIpSomehow();
    return c;
}

getIp().then(ip => {
    //all axios stuff in here
    console.log(ip)
})
//however as you may see getIp function is quite useless so we could as well do 
// getIpSomehow().then(...)

Answer 2

It is important to note that when dealing with an asynchronous function, you are not receiving a string directly; instead, you are getting a promise of a string, which essentially means it's a promise for the data.

The data contained within the promise can only be accessed once the promise has been resolved.

function getIpSomehow() {
  return new Promise(res => {
      setTimeout(() => {
          res("127.0.0.1")
        },500)}
      )
  }
async function getIp() {
    //var c = await publicIp.v4();
    const c = await getIpSomehow();
    return c;
}

getIp().then(ip => {
    //all axios stuff in here
    console.log(ip)
})
//however as you may see getIp function is quite useless so we could as well do 
// getIpSomehow().then(...)

Asynchronous functions within the next context

Answer №1

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