Node.js express - Setting header to json format not working

Question

I have created a little API using node.js, express and mysql. It's returning the json as expected. Now I would like to set the header .setHeader('Content-Type', 'application/json') too.

How do I need to alter this part to do so?

Working:

...
module.exports = app;
var server = http.createServer(app);
server.listen(4001);

Attempts (Not working):

...
module.exports = app;
//var server = http.createServer(app);
var server = http.createServer(function(req,res){
      res.statusCode = 200;
      res.setHeader('Content-Type', 'application/json');
      res.send(app);
      res.end();
});
server.listen(4001);

Found my mistake. Had to use:

res.json({"status": 200, "error": error, "response": null});

instead of

res.send(JSON.stringify({"status": 200, "error": null, "response": results}));

Unfortunately didn't work. Getting 'TypeError: res.json is not a function' and nodemon says 'app crashed' — Philipp M
– Philipp M, Commented Feb 20, 2018 at 17:50
looks like you are doing using only HTTP module. app is your express object ? — Rahul Sharma
– Rahul Sharma, Commented Feb 20, 2018 at 17:52

e-info128 · Accepted Answer · 2024-04-28 19:01:07Z

0

Booth for setHeader and .json is not supported in same response. You need use only .json() for json rest api outputs.

answered Apr 28, 2024 at 19:01

e-info128

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