I have a register form with only one field (username). When I try to register a new member I got that error Error: Network Error
Here is my Register Class
constructor(props) {...}
handleChange(event) {...}
handleSubmit(event) {
const username = this.state.username;
console.log(username);
axios.post("http://localhost:1270/", { username }, { withCredentials: true }
).then(reponse => {
console.log('register', reponse)
});
event.preventDefault();
}
render() {...}
And the my server.js
app.use((req, res, next) => {
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept');
next();
});
app.post('/', (request, reponse) => {
mongo.connect(url, function (err, db) {
var dbo = db.db("mern-pool");
var username = request.body.username;
console.log(username);
var obj = {
username:username
};
dbo.collection("students").insertOne(obj, function(err, result) {
db.close();
reponse.send('inserted');
});
});
});
If I delete this part of my code, my username is inserted correctly
{ withCredentials: true }
When axios
requests don't return 200 it throw an error. You have to haddle it. Replace the axios call to this:
axios.post("http://localhost:1270/", { username }, { withCredentials: true })
.then(reponse => {
console.log('register', reponse);
})
.catch(err => {
console.log('Axios Err', err);
})
Then tell us.
This may caused by CORS... I already tried to set manualy the headers for CORS but still having issues, then I just npm install cors
then:
var cors = require('cors')
app.use(cors())
Based on your comment on Jackson's answer, it looks like you have Access-Control-Allow-Credentials
enabled as well as Access-Control-Allow-Origin
set to *
. CORS doesn't allow for * and credentials to be true, you have to specify http://localhost:1270/
as an allowed origin in your api, that will allow you to have Access-Control-Allow-Credentials: true
.
CORS can be a pain if you don't know its quirks, it basically stops requests being made to the api from a location it doesn't recognize. So when you specify *
that says it will allow every origin, every source, to be able to access the api. However, one quirk of CORS is that if your Allow-Origin is *, it will not allow Access-Control-Allow-Credentials: true
. So if you need that to be true, you need to specify your client app origin ( http://localhost:1270/
I think) as an acceptable location to receive requests from.
Hope that makes sense and helps
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