apply_filters( 'rest_request_before_callbacks', WP_REST_Response|WP_HTTP_Response|WP_Error|mixed $response, array $handler, WP_REST_Request $request )

Filters the response before executing any REST API callbacks.

Contents

Description

Allows plugins to perform additional validation after a request is initialized and matched to a registered route, but before it is executed.

Note that this filter will not be called for requests that fail to authenticate or match to a registered route.

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Parameters

$response WP_REST_Response|WP_HTTP_Response|WP_Error|mixed
Result to send to the client.
Usually a WP_REST_Response or WP_Error.
$handler array
Route handler used for the request.
$request WP_REST_Request
Request used to generate the response.

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Source

File: wp-includes/rest-api/class-wp-rest-server.php. View all references 

$response = apply_filters( 'rest_request_before_callbacks', $response, $handler, $request );

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Changelog

Changelog
Version Description
4.7.0 Introduced.

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User Contributed Notes

  1. Skip to note 1 content
    You must log in to vote on the helpfulness of this noteVote results for this note: 0You must log in to vote on the helpfulness of this note
    Contributed by pixelandgrain —

    Here is the code I have used to authenticate each request and limit route access using allowed routes set in an array

    /**
 * Callback function to authorize each api requests
 * 
 * @see \WP_REST_Request
 * 
 * @param                  $response
 * @param                  $handler
 * @param \WP_REST_Request $request
 *
 * @return mixed|\WP_Error
 */
function wpdocs_authorize_api_requests( $response, $handler, WP_REST_Request $request ) {
    // allowed routes
    $routes = array(
        '/wp/v2/posts',
        '/wp/v2/pages',
    );

    // check if authorization header is set
    if ( ! $request->get_header( 'authorization' ) ) {
        return new WP_Error( 'authorization', 'Unauthorized access.', array( 'status' => 401 ) );
    }

    // check for certain role and allowed route
    if ( !in_array( 'administrator', wp_get_current_user()->roles || ! in_array( $request->get_route(), $routes ) ) {
        return new WP_Error( 'forbidden', 'Access forbidden.', array( 'status' => 403 ) );
    }

    return $response;

}
// authorize each requests
add_filter( 'rest_request_before_callbacks', 'wpdocs_authorize_api_requests', 10, 3 );

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