I am trying to download a PDF file using NodeJS then send its data to client to be embedded in the page. Here is how I download the PDF file:

exports.sendPdf = function(req, responce) {

    var donneRecu = req.body;

    var url = 'http://www.ieee.org/documents/ieeecopyrightform.pdf'//pdf link

    http.get(url, function(res) {

        var data = '';

        res.on('data', function(chunk) {

            console.log('downloading');

            data += chunk;

        });

        res.on(end, function() {

            console.log('downloaded');

            responce.header(Access-Control-Allow-Origin, *);

            responce.header(Access-Control-Allow-Headers, X-Requested-With);

            responce.header(200, {'content-type' : 'application/pdf'});

            responce.send(data);

        });

    }).on(error, function() {

        callback(null);

    });

}

How do I send the data received from NodeJS to the client side?

EDIT
i found the solution :

exports.sendPdf = function(req, res) {



  var donneRecu = req.body;



  console.log(donneRecu['lien']);



  var url = donneRecu['lien']; //pdf link



  http.get(url, function(response) {



      var chunks = [];



      response.on('data', function(chunk) {



          console.log('downloading');



          chunks.push(chunk);



      });



      response.on(end, function() {

          console.log('downloaded');

          var jsfile = new Buffer.concat(chunks).toString('base64');

          console.log('converted to base64');

          res.header(Access-Control-Allow-Origin, *);

          res.header(Access-Control-Allow-Headers, X-Requested-With);

          res.header('content-type', 'application/pdf');

          res.send(jsfile);

      });

  }).on(error, function() {

      callback(null);

  }); 

}

next in my angular controller:

var pdf = $scope.base64ToUint8Array(data);    

PDFJS.getDocument(pdf).then(functiongetPdfHelloWorld(_pdfDoc) {

$scope.pdfDoc = _pdfDoc;$scope.renderPage($scope.pageNum); });