Send result from HTTP request in Angular to NodeJS

I am currently sending a request from NodeJS to get some data, as such :

In Angular :

$http.post(API_ENDPOINT.url + '/annonce', {'link': url}).then(function (result) {
...
}

And in Node :

apiRoutes.post('/annonce', function (req, res) {
  const url = req.body.link

  request.get({
    uri: url,
    encoding: null
  }, function (error, response, html) {
    if (!error) {
      res.send(parser(url, html))
    }
  })

  return res
})

I would like to send this request from my front-end (Angular). I guess I could simply do the request like this :

$http.get(url).then(function(result)) {
    // send another post request to the back end with the result
}

but I've heard it was easier to use pipes in this case. Thing is, I really don't understand how to make it work. Can anyone help ?

via mtefi