Node.js http.get against squarespace.com site has status code 403

When I do a simple http.get for a URL that goes to a SquareSpace (SS) site I'm getting a 403 message. I know the site is working and that the server can reach it. Here's a simple example against a SS site (not mine, but produces the same issue):

Show that server can access site: curl http://www.letsmoveschools.org This returns all the HTML from the site...

Node app

var http = require('http');
var url;

url = 'http://www.letsmoveschools.org/';

var req = http.get(url, function(res) {

  res.on('data', function(chunk) {
   //Handle chunk data
  });

  res.on('end', function() {
    // parse xml
    console.log(res.statusCode);
  });

  // or you can pipe the data to a parser
  //res.pipe(dest);

});

req.on('error', function(err) {
  // debug error
  console.log('error');
});

When I run the node app now node app.js it outputs the 403 status code.

I have tried this code with other sites and it works fine, just not against squarespace sites. Any idea of either configuration on SS or something else I need to do in Node?

Solution

The problem is that the remote server is expecting/requiring a User-Agent header and node does not send such headers automatically. Add that and you should get back a 200 response:

// ...

url = 'http://www.letsmoveschools.org/';

var opts = require('url').parse(url);
opts.headers = {
  'User-Agent': 'javascript'
};

var req = http.get(opts, function(res) {
// ...