我在 Heroku 上部署了我的应用程序，但后来我遇到了 cors 问题

Question

Since several days now I'm trying to make my app work on Heroku, but I have CORS problem. I read the package cors documentation and I think I'm doing it right, but you can see my back-end here: https://github.com/Karlus44/orientation-back (I'll paste the relevant code) You can also find my front-end here: https://github.com/Karlus44/orientation-front and see that when you go to my app (here: https://orientation-front.herokuapp.com/ ) you have some CORS errors. Thanks for any help Here is the code in my server:

const express = require('express');
const bcrypt = require('bcrypt-nodejs');
const cors = require('cors');
const multer = require('multer');

//many declarations


const app = express();

app.use(express.urlencoded({extended: false}));
app.use(express.json());

var corsOptions = {
  origin: 'https://orientation-front.herokuapp.com',
  methods: 'GET,POST',
  allowedHeaders: 'Content-Type',
  optionsSuccessStatus: 200
}


app.options('*', cors(corsOptions));



app.get('/',cors(corsOptions), (req,res)=>{
  return db('utilisateurs').count('id')
  .then(data => res.json(data));
})

//example of request

app.post('/signin', cors(corsOptions), (req,res) => {signin.handleSignin(req,res, db, bcrypt)})

Answer 1

thanks for trying. The error was in fact in my requests in my front files. The link was wrong. I just needed to change all my ' https://git.heroku.com/orientation-back.git/ ' into ' https://orientation-back.herokuapp.com/ '