I'm developing a simple app using Express.js and React, both applications in the development environment (local machine) are on different ports, the server (Express) on localhost: 3001 and the Frontend (React) on localhost: 3000.
The problem I have is that trying to send data from the Frontend using Fetch API Express does not receive the data sent via POST by React. I did a test doing a POST from a normal form and the server did accept the parameters I send via POST, so I think the problem is something with the call from Javascript using Fetch API.
In Express I already installed the cors module to accept requests that are not of the same domain but the problem persists.
Below is a snippet of code from both for a better understanding.
...
// handler recieves the 'e' event object
formPreventDefault(e) {
var headers = new Headers();
headers.append('Accept', 'application/json, application/xml, text/plain, text/html, *.*');
headers.append('Content-Type', 'multipart/form-data; charset=utf-8');
headers.append('Access-Control-Allow-Origin', '*');
headers.append('Access-Control-Allow-Headers', 'Content-Type');
var myForm = document.getElementById('myForm');
var formData = new FormData(myForm);
formData.append('email', 'demo@domain.com');
formData.append('password', '12345');
var options = {
headers: headers,
mode: 'no-cors', // crossdomain *
method: 'post',
body: JSON.stringify({ 'email': 'admin@domain.com', 'password': '12345' }) // formData
};
var request = new Request('http://localhost:3001/user/signin', options);
fetch(request).then(function(response) {
console.log("Success");
return response;
}).then(function(json) {
console.log(json);
}).catch(function(err) {
console.log("Error " + err);
})
// prevent submit form
e.preventDefault();
}
render() {
return (
<div className="row">
<div className="col-md-4 ">
<form id="myForm" action="http://localhost:3001/user/signin" method="post" onSubmit={this.formPreventDefault}>
<div className="form-group">
<label htmlFor ="email">Email address</label>
<input type="email" className="form-control" id="email" name="email" placeholder="Email" />
</div>
<div className="form-group">
<label htmlFor ="password">Password</label>
<input type="password" className="form-control" id="password" name="password" placeholder="*******" />
</div>
<button type="submit" className="btn btn-default">Submit</button>
</form>
</div>
</div>
);
}
}
...
Express Controller
...
// Handle User Sign In on POST
exports.user_create_post = function(req, res) {
console.log(req.body); // This always returns an empty value
//Check that the name field is not empty
req.checkBody('email', 'Email address is required').notEmpty();
req.checkBody('password', 'Password is required').notEmpty();
//Run the validators
var errors = req.validationErrors();
//Create a genre object with escaped and trimmed data.
var user = new User(
{ email: req.body.email, password: req.body.password }
);
if (errors) {
//If there are errors render the form again, passing the previously entered values and errors
// res.render('users/sign_up', { title: 'Sign Up', user: user, errors: errors });
res.json({ user: user, errors: errors });
return;
}
else {
// Data from form is valid.
//Check if User with same email already exists if not the new user is saved
User.findOne({ 'email': req.body.email })
.exec( function(err, found_user) {
if (err) { return next(err); }
if (found_user) {
//User exists, redirect to the home page
// res.render('users/home', { title: 'Home', user: found_user });
res.json({ user: found_user });
}
else {
// Save user
user.save(function (err) {
if (err) { return next(err); }
// Create session
req.session.user_id = user._id.toString();
// User saved. Display user profile page
// res.render('users/home', { title: 'Home', user: user });
res.json({ user: user });
});
}
});
}
};
...
Any help is welcome
