title: how to download pdf using NodeJS and send it to the client?
body: <p>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: </p>
  
  <pre><code>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);
      });
  }
  </code></pre>
  
  <p>How do I send the data received from NodeJS to the client side?</p>
  
  <p><strong>EDIT</strong>
  i found the solution :</p>
  
  <blockquote>
  <pre><code>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);
    }); 
  }
  </code></pre>
  </blockquote>
  
  <p>next in my angular controller:</p>
  
  <blockquote>
  <pre><code>var pdf = $scope.base64ToUint8Array(data);    
  PDFJS.getDocument(pdf).then(functiongetPdfHelloWorld(_pdfDoc) {
  $scope.pdfDoc = _pdfDoc;$scope.renderPage($scope.pageNum); });
  </code></pre>
  </blockquote>