Invalid JSON GET Request Express.js

Question

While writing an API, I have come across a very thorny error: when I try to do a res.send(INSERT JSON) with a Content-Type header application/json

Answer 1

I believe the problem is that you want to be using Content-Type header in your servers response; not in your request Content-Type header.

When you use the Content-Type header in your request, Express will read the Content-Type and attempt to interpret the provided information as that Content-Type, in this case, as JSON. Because this is a GET request and thus has no body, Express is trying to interpret an empty string as JSON, which is giving you the error.