set headers in express

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1 	response.header("Access-Control-Allow-Origin", "*");
2    response.header("Access-Control-Allow-Headers", "Origin, X-Requested-With,Content-Type, Accept");
3    response.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE')

1var host = req.headers['host'];

1app.get('/', (req, res) => {
2  req.header('User-Agent')
3})
4// Use the Request.header() method to access
5//one individual request header’s value

1res.location('/customers/' + inst._id)1

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