Custom request headers are always null

Hey there,

I try to separate the caches using a custom header field. I used:

function legals_add_cacheable_request_headers( $cacheable_headers ) {
    if ( !is_array($cacheable_headers) ) $cacheable_headers = array();
    $cacheable_headers['wp/v2/legals_text'] = 'X-Legals_Control';
    $cacheable_headers['wp/v2/legals_text'] = 'X-Legals_Control,X-Legals_Control-2';
    return $cacheable_headers;
}
add_filter('wp_rest_cache/cacheable_request_headers', '..._add_cacheable_request_headers', 10, 1);

to register the headers for the specific routes in the plugin.
Then I changed the api calls to set the http header in the requests. But the cache entries only show
Request Headers: {"X-Legals_Control":null}

A closer look into the plugin showed me, that this is not really supported, isnt it?
In class-endpoint-api.php:

	private function set_cacheable_request_headers() {
		$request = new \WP_REST_Request();
		$server  = new \WP_REST_Server();
		$request->set_headers( $server->get_headers( wp_unslash( $_SERVER ) ) );
...

Only the header fields supported by the $_SERVER variable are considered. Is it the way it should work?

Also, I should mention that im using the version 2020.1.1. The newest isnt caching at all.

I would appreciate <our help.

Thanks

• This topic was modified 5 years, 11 months ago by zzusyu.