CODEWITHSUNDEEP
node.jsexpressdownloadstreaming
AlexNasonov
AlexNasonov

Reputation: 607

Node/Express: No download on stream.pipe()

Is there any way to force download when i pipe stream to response? If I look into Chrome tools, I see that response is OK, with fine headers:

HTTP/1.1 200 OK
Server: Cowboy
Connection: keep-alive
X-Powered-By: Express
Content-Type: application/pdf
Date: Mon, 10 Oct 2016 20:22:51 GMT
Transfer-Encoding: chunked
Via: 1.1 vegur
Request Headers
view source

I even see the pdf file code in detailed response, but no file download is initiated. Maybe I miss something?

My code on route looks like:

router.post('/reports/create', access.Regular, function (req, res, next) {
    ...

    pdf.create(html).toBuffer(function(err, buffer){
        res.writeHead(200, {
            'Content-Type': 'application/pdf',
            'Content-Disposition': 'attachment; filename=some_file.pdf',
            'Content-Length': buffer.length
        });
        res.end(buffer)
    });
});

Upvotes: 5

Views: 3549

Answers (2)

Cesar Llanes
Cesar Llanes

Reputation: 1

it works for me like this:

var html = '<h1>Hello World</h1>';
let options = {
   format: 'Letter',
   border: '1cm'
};
pdf.create(html, options).toBuffer(function (err, Buffer) {
        if (err) {
            res.json({
            data: 'error PDF'
            })
        } else {
            res.set({
                'Content-Disposition': 'attachment; filename=test.pdf',
                'Content-Type': 'application/pdf; charset=utf-8'
            });
            res.write(Buffer);
            res.end();
        }
    });

Upvotes: 0

peteb
peteb

Reputation: 19418

You need to add a Content-Disposition Header to signal to the browser that there is content attached that needs to be downloaded.

app.get('/:filename', (req, res) => {
  // Do whatever work to retrieve file and contents      

  // Set Content-Disposition Header on the response
  // filename is the name of the file the browser needs to download when 
  // receiving  the response to this particular request
  res.setHeader('Content-Disposition', `attachment; filename=${req.params.filename}`);

  // stream the fileContent back to the requester
  return res.end(fileContent)
});

Upvotes: 2

Related Questions