Fine Uploader在Facebook iframe中失败

我已经建立了一个需要一些图像上传功能的Facebook应用程序,为了实现它,我使用了Fine Uploader。

Facebook应用程序本身是用WordPress构建的,一切都很好。最终,WordPress网站(即应用程序)将以iframe的形式出现在Facebook上,事情变得越来越有趣。

当我在本地机器上测试应用程序时,它可以工作(所有浏览器)。当我在我的暂存环境中测试iframe之外的应用程序时,它也能工作(所有浏览器)。然而,当我在Facebook(iframe)的测试页面中测试该应用程序时,图像上传失败,仅在IE中失败。

为了参考,我将显示我的服务器和客户端代码:

public static function upload_receiver()
{
    $uploader = new qqFileUploader();
    $uploader->allowedExtensions = array("jpg", "jpeg");
    $uploader->sizeLimit = 2024 * 1024;

    $wp_upload_dir = wp_upload_dir();
    $wp_upload_url = $wp_upload_dir['baseurl'];
    $wp_upload_base = $wp_upload_dir['basedir'];

    $upload_dir = $wp_upload_base;
    $upload_filename = md5(mt_rand())/*.'_'.$uploader->getName()*/.".jpg";

    $result = $uploader->handleUpload( $upload_dir, $upload_filename );

    // Create the WordPress image thumbs.
    $img_target = "{$upload_dir}/{$upload_filename}";

    $wp_filetype = wp_check_filetype( $img_target );

    $attachment_data = array(
        'post_mime_type' => $wp_filetype['type'], 
        'guid' => $img_target,
        'post_title' => preg_replace('/\.[^.]+$/', '', $upload_filename ),
        'post_name' => preg_replace('/\.[^.]+$/', '', $upload_filename ),
        'post_content' => '',
        'post_status' => 'inherit',
    );

    $attachment_id = wp_insert_attachment( $attachment_data, $img_target );

    $meta = wp_generate_attachment_metadata($attachment_id, $img_target);

    wp_update_attachment_metadata($attachment_id, $meta);   

    $result['attachmentId'] = $attachment_id;
    $result['imageUrl'] = htmlspecialchars( get_image_url_from_attachment_id($attachment_id, "thumb-small") );

    header("Content-Type: text/plain");
    echo json_encode( $result );

    die();
}

客户:

var el = $('#upload');
var el_img = el.find('span');

el.fineUploader( {
    uploaderType: 'basic',
    button: el,
    multiple: false,
    request: {
        endpoint: '<?php echo site_url("/wp-admin/admin-ajax.php") ?>',
        params: {
            action: 'upload_receiver'           
        }
    },
    validation: {
        allowedExtensions: ['jpeg', 'jpg']
    },
    debug: false
} ).on('upload', function(event, id, fileName, response) {
    $('.loader').show();
    $('.upload_button_container').hide();

} ).on('complete', function(event, id, fileName, response) {

    // ONLY IN IE "RESPONSE.SUCCESS" IS FALSE IN AN FB IFRAME. ALL OTHER
    // TIMES "RESPONSE.SUCCESS" IS TRUE AND ALL PROPERTIES CREATED ON THE
    // SERVER EXIST.

    $('.loader').hide();
    $('.upload_button_container').show();

    if( response.error )
    {
        alert( response.error );
        return;
    }

    // Display image coming in from the result.
    $(".img_upload_container img").attr('src', response.imageUrl).show();

    // Store the WordPress attachment Id for form submission.
    $("form input[name=bc_attachment_id]").val( response.attachmentId );
});

在过去的几个小时里,我一直在思考这个问题,我已经没有任何可能导致这个问题的想法了。

编辑 :

IE9控制台输出:

LOG: [FineUploader] Processing 1 files or inputs... 
LOG: [FineUploader] Sending upload request for 0 
SEC7111: HTTPS security is compromised by res://ieframe.dll/forbidframing.htm 
SEC7111: HTTPS security is compromised by res://ieframe.dll/ErrorPageTemplate.css 
SEC7111: HTTPS security is compromised by res://ieframe.dll/errorPageStrings.js 
SEC7111: HTTPS security is compromised by res://ieframe.dll/httpErrorPagesScripts.js 
SEC7111: HTTPS security is compromised by res://ieframe.dll/red_x.png 
SEC7111: HTTPS security is compromised by res://ieframe.dll/bullet.png 
SEC7111: HTTPS security is compromised by res://ieframe.dll/background_gradient.jpg 
LOG: [FineUploader] Received response for 0 
[FineUploader] Error when attempting to access iframe during handling of upload response (Error: Access is denied.
) 
LOG: [FineUploader] iframe loaded 
[FineUploader] Error when attempting to parse form upload response (Error: Access is denied.
)