Return pdf file from webservice with Node.js

Question

Context of the Problem: There is an external webservice, which is not part of the domain of my application, which, when accessed directly via browser, takes the user to a uploading web page that handles the request according to the parameters passed in the url and later, returns a file. pdf directly in the browser view.

I am working on an application that aims to call that specific webservice and return a file. pdf generated by this for the user.

In order to try to get the file generated by the webservice, I tried to use the package request of npm as follows:

    var request= Meteor.npmRequire('request');
    request.get({
              url: this_nfse.link_nfse,  timeout: 1500, jar: true, encoding: 'binary'
            }
            , Meteor.bindEnvironment(function( error, response, body ){
      if(!error && response)
      {          
        //tratar resultado de acordo com o objetivo da aplicação
      }          
    }));

But what I get in the body object is the html page that makes the file generation request. pdf to webservice, not the file or representation of that itself.

Obs.: I tried using the native HTTP package of the media, but I got the same result.

Any help or tip will be very welcome, thank you very much.