NodeJS : Validating request type (checking for JSON or HTML)

Question

I would like to check if the type that is requested by my client is JSON or HTML, as I want my route to satisfy both human and machine needs.

I have read the Express

Answer 1

Please define "not working as they should", because they do for me.

In other words:

// server.js
console.log('Accepts JSON?', req.accepts('json') !== undefined);

// client sends 'Accept: application/json ...', result is:
Accepts JSON? true

// client sends 'Accept: something/else', result is:
Accepts JSON? false

The Content-Type header as sent by a client isn't used for content negotiation, but to declare the content type for any body data (like with a POST request). Which is the reason why req.is() isn't the correct method to call in your case, because that checks Content-Type.