I've successfully implemented the "AJax best-practices" from this article:
http://www.garyc40.com/2010/03/5-tips-for-using-ajax-in-wordpress/
One of my Ajax handlers is supposed to force the download of a file. The controller works fine if you navigate to it directly, e.g.
http://mysite.com/wp-content/plugins/my-plugin/ajax/my_controller.php
But when I request it via the WordPress API, the controller returns the correct data, but something doesn't work correctly that way. I suspect that the WP ajax handler is printing its own headers (?) and ignoring mine.
I'm using the wp_localize_script to pass the URL to my Ajax controller (as described in the above article), and that's working.
The request is triggered via Javascript like this:
jQuery(document).ready(function() {
jQuery.post(
MyObject.ajax_url,
{
action : 'download_def',
},
function( response ) { console.log(response); }
);
});The controller file prints a bunch of headers to trigger the download, and then prints the payload text. Something like this:
<?php
header("Content-Type: application/force-download");
header("Content-Disposition: attachment; filename=myfile.txt");
header("Content-length: ".(string) mb_strlen($payload, '8bit') );
header("Expires: ".gmdate("D, d M Y H:i:s", mktime(date("H")+2, date("i"), date("s"), date("m"), date("d"), date("Y")))." GMT");
header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
header("Cache-Control: no-cache, must-revalidate");
header("Pragma: no-cache");
print $payload;
?>When I check the console in firebug, the payload is entirely correct, but the download isn't triggered unless I access the controller file directly, outside of the WP Ajax API.
Anyone have any pointers here?
