如何进行axios获取服务器端调用然后发送给客户端

Question

I am getting cors issues when I make this request on the client side:

  componentDidMount = () => {
    console.log('app loading...');
    axios.get('some/random/api').then((res) => {
      console.log(res, 'res');
    })
  }

this is part of my server side code:

app.use('/', express.static('public'));

axios.get(url, {
        "headers": {"Authorization": "Bearer "}
      })
      .then(response => {
        console.log(response)
       //I WANT TO SEND THE RESPONSE HERE TO THE REACT CLIENT
      })
      .catch(err => {
        console.log(err)
      })

how can I then pick this data up on the client side?

thanks

Answer 1

• Install cors library: npm install --save cors
• Import it to your express project: const cors = require('cors');

• Attach cors to your express app, before routes definitions: app.use(cors())

   const express = require('express') const cors = require('cors') const app = express() app.use(cors()) app.get('/', function (req, res, next) { res.json({msg: 'This is CORS-enabled for a Single Route'}) }); 

Answer 2

As a quick fix, you can also install this chrome extension

https://chrome.google.com/webstore/detail/allow-control-allow-origi/nlfbmbojpeacfghkpbjhddihlkkiljbi?hl=en

However, the long-lasting solution is using the yarn add cors and adding it to your root file in express js. as highlighted above by @Artem Mirchenko

Answer 3

you need to wrap your server code in a route, as per artem's answer likey so:

app.get('/some/random/api', function (req, res, next) {
  // axios request to other server goes here
  axios.get(...)
    .then( other_server_response => {
      // process other server response if necessary here
      res.json({ returned_data: other_server_response });
    });
});

edit: now I look at it, I'm not sure this is what you want. Might just need to call the other service from your client and include cors info.