React Native fetch https Node js server - node.js

Question

i seriously need help with this:
i built my first node js server, here:
var express = require('express'),
app = express(),
https = require('https');
port = process.env.PORT || 443,
mongoose = require('mongoose'),
Task = require('./api/models/myCarModel'),
bodyParser = require('body-parser');
fs = require("fs");
const options = {
key: fs.readFileSync('./static/HttpsFile/privatekey.pem').toString(),
cert: fs.readFileSync('./static/HttpsFile/certificate.pem').toString(),
};
mongoose.Promise = global.Promise;
mongoose.connect('mongodb://localhost/Tododb');
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
var routes = require('./api/routes/myCarRoutes'); //importing route
routes(app); //register the route
https.createServer(options, app).listen(port);
console.log(options.key)
console.log('RESTful API server started on: ' + port);
and here's my simple react-native app home:
import React, { useState } from 'react';
import { useEffect } from 'react';
import { Button, StyleSheet, Text, TextInput, View } from 'react-native';
const Home = () => {
const [text, setText] = useState('');
useEffect(()=> {
debugger
fetch('https://192.168.1.8:443/cars', {
method: 'GET',
headers: {
Accept: 'application/json',
'Content-Type': 'application/json'
}})
//axios.get("https://192.168.1.8:3000/cars")
.then((res:any) => {
debugger;
}, (err:any) => {
console.log(err)
debugger;
})
}, [])
return(...etc...)
now:
when I first used postman to test the API I got an error regarding the use of self-signed certificates ( which I'm using through OpneSSL ). I kindly asked Postman to accept the idea, and everything went on fine.
This is not the case with react-native:
I'm using expo, testing my app on my android phone and when I debug the API call I get the following error in the error-then: "TypeError: Network request failed".
I don't want to dirty solve the problem by making Android accept HTTP protocol.
Ty everyone

Answer 1

So you are running the app on your phone? Your phone does not have access to the server you are running on your computer. 'https://192.168.1.8:443/cars' is only accessible if you try to connect to it on the same device (it could be a simulator running on your computer). But still this may not work if you use an internal device. In that case you can access it trough http://10.0.2.2:433 (this worked for me).
Bonus point: Https does not work on local computer. Since it cant verify the request. When testing localy use "http".