How to set headers for a React app created using 'create-react-app'

Question

I created a sample react app using "create-react-app". I need to set the request headers with X-Frame-options and Content-Security-Policy. How do I do this? I just tried to update my index.html with the below code, but I'm not sure whether this it's right or not. Can anyone help with this?

   <meta http-equiv="Content-Security-Policy" content="frame-ancestors 'none'">
   <meta http-equiv="X-Frame-Options" content="SAMEORIGIN"> 

Answer 1

Simply modifying index.html as you have is not sufficient, at least for X-Frame-Options. Per OWASP:

Common Defense Mistakes

Meta-tags that attempt to apply the X-Frame-Options directive DO NOT WORK. For example, ) will not work. You must apply the X-FRAME-OPTIONS directive as HTTP Response Header...

MDC has a similar warning.

I spent some time looking, but didn't find a way to set X-Frame-Options in React itself. There are ways to do it at the server level or in other languages (e.g. for Tomact, or in Java, or with webpack, or configure it with Spring Security), which may or may not be helpful to you.

React doesn't seem to support Content-Security-Policy either... at least not as of 2013, and I searched but did not find any more recent change in position.