POST request between javascript in website and node.js server

Question

I need to send the data from an HTML form using a javascript function to a node.js server running at the same address. For the record, i have a website hosted on my Raspberry PI, using a custom domain. This is the javascript function:

$.post("http://www.website.com:2052/form", formData, function(data){
    ...
    console.log("POST SUCCESS");
    ...
});

This is the code for my node.js server:

app.post('/form', function(req, res){
    ....
    console.log('POST - body: ' + JSON.stringify(req.body));
    res.send({result:"success"});
    ....
});

When i send the form data to the server, i receive it on the server, but i get this on website-side:

Failed to load http://www.website.com:2052/form: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://www.website.com' is therefore not allowed access.

I understand that i need to add the access control header in the response, but considering they are on the same "ip", why is it needed? Or how can i make the node.js server actually appear on the same domain? Thanks

Did you try to include the port number on access control header ? — lcssanches
– lcssanches, Commented Aug 24, 2018 at 18:16

Observablerxjs · Accepted Answer · 2018-08-24 18:26:54Z

1

You should add this to your node.js server:

app.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  res.header("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
  next();
});

You can check out documentation for:

Access-Control-Allow-Origin:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Access-Control-Allow-Origin
Access-Control-Allow-Methods:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Access-Control-Allow-Methods
Access-Control-Allow-Headers:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Access-Control-Allow-Headers

edited Aug 24, 2018 at 18:26

answered Aug 24, 2018 at 18:20

Observablerxjs

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1 Comment

user3808318 Over a year ago

Thank i will try it now

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