The request_headers plugin provides access to headers sent in the request in a more natural way than directly accessing the env hash.
In practise this means you don't need to uppercase, convert dashes to underscores, or add a HTTP_ prefix.
For example, to access a header called X-My-Header you would previously need to do:
But with this plugin you can now say:
The name is actually case-insensitive so x-my-header will work as well.