Support » Plugin: WP REST API (WP API) » Getting JSONP to work

  • Resolved darrinb


    I’m calling the API like so:

        type: "GET",
        url: '<ID>/?_jsonp=?',
        dataType: 'jsonp',
    }).success( function(response){

    But keep getting an error message in Chrome:

    Refused to execute script from XXX because its MIME type (‘application/json’) is not executable, and strict MIME type checking is enabled.

    After testing, there were two solutions I could see. Removing the call to the “nosniff” header in JSON_API_Server::serve_request() or changing the content type if a jsonp request is detected like so:

    if ( isset( $_GET['_jsonp'] ) && $jsonp_enabled ) {
        $this->send_header( 'Content-Type', 'application/javascript; charset=' . get_option( 'blog_charset' ), true );
    } else {
        $this->send_header( 'Content-Type', 'application/json; charset=' . get_option( 'blog_charset' ), true );

    But I’m not sure this is 100% accurate

Viewing 5 replies - 1 through 5 (of 5 total)
  • Looking at the code, this should be accurate (I’d opt for sending the alternative header over removing the type checking, however).

    Plugin Author Ryan McCue


    Sorry about this! This is fixed in the current development version and will be included with version 1.2.

    I’m writing an app using the Ionic framework and I’m getting the same problem.
    I’ve got the angular.js call:

    $http.jsonp("http://localhost/matImms/wp-json/posts?callback=JSON_CALLBACK").success(function (posts) {
                    this.postsData = posts;

    The problem seems to be _jsonp is not being set at all – so the fix doesn’t work. However, even hacking the code so that ‘application/javascript’ is always return doesn’t seem to work – and I’m not sure how to fix this. Any ideas?

    Same for me like @bigfatfrog!!

    I used the $http.get method as a workround – and it seems to be working fine!

Viewing 5 replies - 1 through 5 (of 5 total)
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