Developing locally with a REST API

As you may know, during these days, at Evolve are building our own WordPress themes and plugins shop, in preparation for the launch of our very first independently sold product, Brix, a drag and drop page builder.

One of the things that we’ve implemented on top of a standard WooCoomerce install, is a purchase code validation system that relies on the well known WordPress REST API.

When developing this kind of things, it’s generally a good idea to have a local copy of both the server and the client, so that the latter can make calls, and the former can answer them.

Now, WordPress has a couple of neat little functions whose job is to make GET and POST calls to external services, namely wp_remote_get and wp_remote_post, and if you’re not using them to perform those tasks, by all means you should!

No matter how hard I try, one of the things that I keep forgetting every time I find myself in this situation, is that you’ll need to add a particular command in your code so that your local copy of the server can be called using said functions.

The command is nothing else than a specific filter that will sort of whitelist the local server address, otherwise unknown to the caller. It goes like this:

add_filter( 'http_request_host_is_external', '__return_true' );

After your development is done, remember to remove the line when going in production.