JSONP Ajax错误Jquery（数字字符串）未调用

Since moving my site to https, the mailchimp api no longer works with the standard json ajax calls. These calls now render a same origin policy error. I don't know why this is the case though, because I'm calling a url on my own server. After some investigating, I've surmised that JSONP is my only option. The following script posts correctly to mailchimp but Im unable to get a successful response.

    $.ajax({
    type:"GET",
    url:"https://mysite/book_subscription_process.php?jsonp=?",
    data:{fname: $('#fNBookId').val(), lname: $('#lNBookId').val(), email: $('#eBookId').val()},//only input
    dataType: "jsonp",
    cache: false,
    async: false,
    jsonp: false,
    success: function(data){
    console.log('success');
    if(data.message == 'failure')
    {
     alert('Error','There was an error processing your subscription. Please try again.');
    }else if(data.message == 'success')
    {
       alert('success');
    }else{
     console.log(data.message);
    } 
        },
     error: function (xhr, ajaxOptions, thrownError, data) {
    // console.log(data.message);
  console.log('failure');
    alert(xhr.status);
    alert(thrownError);
  }

    });

Server side:

     <?php
     header("content-type: text/javascript"); 
     if(isset($_GET['jsonp']))
     {
        $obj->fname = $_GET['fname'];
        $obj->lname = $_GET['lname'];
        $obj->email = $_GET['email'];
        $obj->success = 'success';
        $obj->failure = 'failure';

    }
    header("Content-type: application/json");  


   $MailChimp = new \Drewm\MailChimp($api_key);

   $book = array('id' => $group_id, 'groups' => array('Book'));

   $merge_vars = array('FNAME'=> $obj->fname, 
   'LNAME'=>$obj->lname,
   'GROUPINGS'=>array($book)
    );

    $result = $MailChimp->call('lists/subscribe', array(
    'id'                => $list_id,
    'email'             => array('email'=>$obj->email),
    'merge_vars'        => $merge_vars,
    'double_optin'      => false,
    'update_existing'   => true,
    'replace_interests' => false,
    'send_welcome'      => false,
    ));
    if ( ! empty( $result['leid'] ) ) {
   echo json_encode($obj->success);
   }
  else{
  echo json_encode($obj->failure);
   }

  ?>

As I said above the info is correctly posted to mailchimp. Each time however, the ajax call errors. I get a 200 OK but get a Jquery[bunch of numbers] not called. The json_encode success statement is executed on the server. Is there a special way that I'm supposed to handle the server side response? Or am I supposed to do something differently on the client side? Thanks in advance.

Same Origin means that the page making the request and the destination server need to have identical protocol, server, and port. For this particular situation, MailChimp isn't either of those -- the page making the request is your HTML page and the server is https://mysite/book_subscription_process.php.

Since you said this corresponds to your move to HTTPS, my guess is that you've moved one end but not the other. Since the code above looks like the front-end page is calling https://mysite, I'd triple check to make sure that the HTML and all scripts are also being served from https://mysite.

I don't think you should need JSONP in this scenario -- it sounds like you are attempting to work from the same origin, you just need to be sure you're doing that properly.