javascriptnode.jsexpress

How can I set response header on express.js assets

I need to set CORS to be enabled on scripts served by express. How can I set the headers in these returned responses for public/assets?

Solution

  • There is at least one middleware on npm for handling CORS in Express: cors (see mscdex's answer).

    This is how to set custom response headers, from the Express docs:

    res.set(field, [value])

    Set header field to value

    res.set('Content-Type', 'text/plain');

    or pass an object to set multiple fields at once.

    res.set({
  'Content-Type': 'text/plain',
  'Content-Length': '123',
  'ETag': '12345'
})

    Aliased as

    res.header(field, [value])