node.js SET HEADER ERROR ON upload to any host

Asked Nov 17 '20 at 19:24

Active Nov 17 '20 at 19:24

Viewed 71 times

I have a problem with node.js html-pdf, its give me the error SET HEADER ERROR,

when I upload a file to any host like Amazon EC2 its give me Error: Can't set headers after they are sent to the client, but it works very will on my device host http://localhost:3000

that makes me confused about how to solve this problem

const pdfTemplate = require('./documents');
var options = { orientation: "landscape",format: "A4", };

app.post('/create-pdf', (req, res) => {
  let fullUrl = req.protocol + '://' + req.get('host');

  pdf.create(pdfTemplate(req.body, fullUrl), options).toFile('result.pdf', (err) => {
      if(err) {
          res.send(Promise.reject());
      } 
      else {
        res.send(Promise.resolve());
      }
  });   
});

asked Nov 17 '20 at 19:24

rashid hacker

Does it make any sense to call `Promise.resolve()` and `Promise.reject()` if you didn't create any Promise beforehand? And what should return a route handler in these two cases? – Anatoly Nov 17 '20 at 20:38
I don't really know what they do, I just copy it from the site, – rashid hacker Nov 18 '20 at 09:46
What site? Can you get a link? – Anatoly Nov 18 '20 at 15:19
https://www.youtube.com/watch?v=bt1tOhUYxvM – rashid hacker Nov 19 '20 at 05:26
start from 17:35, he put the `Promise` values – rashid hacker Nov 19 '20 at 05:27
I watched and it still does not make sense at all for me. You can just do: `if(err) { res.status(400).send('Error creating PDF'); } else { res.status(200).send('OK'); }` – Anatoly Nov 19 '20 at 14:39
And please add a response from your request – Anatoly Nov 19 '20 at 14:39
thx i will try this code – rashid hacker Nov 19 '20 at 15:10

node.js SET HEADER ERROR ON upload to any host

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