WordPress/WordPress

<?php
/**
 * Server-side file upload handler from wp-plupload or other asynchronous upload methods.
 *
 * @package WordPress
 * @subpackage Administration
 */

if ( isset( $_REQUEST['action'] ) && 'upload-attachment' === $_REQUEST['action'] ) {
    define( 'DOING_AJAX', true );
}

if ( ! defined( 'WP_ADMIN' ) ) {
    define( 'WP_ADMIN', true );
}

if ( defined( 'ABSPATH' ) ) {
    require_once ABSPATH . 'wp-load.php';
} else {
    require_once dirname( __DIR__ ) . '/wp-load.php';
}

require_once ABSPATH . 'wp-admin/admin.php';

header( 'Content-Type: text/plain; charset=' . get_option( 'blog_charset' ) );

if ( isset( $_REQUEST['action'] ) && 'upload-attachment' === $_REQUEST['action'] ) {
    require ABSPATH . 'wp-admin/includes/ajax-actions.php';

    send_nosniff_header();
    nocache_headers();

    wp_ajax_upload_attachment();
    die( '0' );
}

if ( ! current_user_can( 'upload_files' ) ) {
    wp_die( __( 'Sorry, you are not allowed to upload files.' ) );
}

// Just fetch the detail form for that attachment.
if ( isset( $_REQUEST['attachment_id'] ) && (int) $_REQUEST['attachment_id'] && $_REQUEST['fetch'] ) {
    $id   = (int) $_REQUEST['attachment_id'];
    $post = get_post( $id );
    if ( 'attachment' !== $post->post_type ) {
        wp_die( __( 'Invalid post type.' ) );
    }

    switch ( $_REQUEST['fetch'] ) {
        case 3:
            ?>
            <div class="media-item-wrapper">
                <div class="attachment-details">
                    <?php
                    $thumb_url = wp_get_attachment_image_src( $id, 'thumbnail', true );
                    if ( $thumb_url ) {
                        echo '<img class="pinkynail" src="' . esc_url( $thumb_url[0] ) . '" alt="" />';
                    }

                    // Title shouldn't ever be empty, but use filename just in case.
                    $file     = get_attached_file( $post->ID );
                    $file_url = wp_get_attachment_url( $post->ID );
                    $title    = $post->post_title ? $post->post_title : wp_basename( $file );
                    ?>
                    <div class="filename new">
                        <span class="media-list-title"><strong><?php echo esc_html( wp_html_excerpt( $title, 60, '&hellip;' ) ); ?></strong></span>
                        <span class="media-list-subtitle"><?php echo esc_html( wp_basename( $file ) ); ?></span>
                        <div class="attachment-tools">
                            <?php
                            if ( current_user_can( 'edit_post', $id ) ) {
                                echo '<a class="edit-attachment" href="' . esc_url( get_edit_post_link( $id ) ) . '">' . _x( 'Edit', 'media item' ) . '</a>';
                            } else {
                                echo '<span class="edit-attachment">' . _x( 'Success', 'media item' ) . '</span>';
                            }
                            ?>
                            <span class="media-item-copy-container copy-to-clipboard-container edit-attachment">
                                <button type="button" class="button button-small copy-attachment-url" data-clipboard-text="<?php echo $file_url; ?>"><?php _e( 'Copy URL to clipboard' ); ?></button>
                                <span class="success hidden" aria-hidden="true"><?php _e( 'Copied!' ); ?></span>
                            </span>
                        </div>
                    </div>
                </div>
            </div>
            <?php
            break;
        case 2:
            add_filter( 'attachment_fields_to_edit', 'media_single_attachment_fields_to_edit', 10, 2 );
            echo get_media_item(
                $id,
                array(
                    'send'   => false,
                    'delete' => true,
                )
            );
            break;
        default:
            add_filter( 'attachment_fields_to_edit', 'media_post_single_attachment_fields_to_edit', 10, 2 );
            echo get_media_item( $id );
            break;
    }
    exit;
}

check_admin_referer( 'media-form' );

$post_id = 0;
if ( isset( $_REQUEST['post_id'] ) ) {
    $post_id = absint( $_REQUEST['post_id'] );
    if ( ! get_post( $post_id ) || ! current_user_can( 'edit_post', $post_id ) ) {
        $post_id = 0;
    }
}

$id = media_handle_upload( 'async-upload', $post_id );
if ( is_wp_error( $id ) ) {
    $message = sprintf(
        '%s <strong>%s</strong><br />%s',
        sprintf(
            '<button type="button" class="dismiss button-link" onclick="jQuery(this).parents(\'div.media-item\').slideUp(200, function(){jQuery(this).remove();});">%s</button>',
            __( 'Dismiss' )
        ),
        sprintf(
            /* translators: %s: Name of the file that failed to upload. */
            __( '&#8220;%s&#8221; has failed to upload.' ),
            esc_html( $_FILES['async-upload']['name'] )
        ),
        esc_html( $id->get_error_message() )
    );
    wp_admin_notice(
        $message,
        array(
            'additional_classes' => array( 'error-div', 'error' ),
            'paragraph_wrap'     => false,
        )
    );
    exit;
}

if ( $_REQUEST['short'] ) {
    // Short form response - attachment ID only.
    echo $id;
} else {
    // Long form response - big chunk of HTML.
    $type = $_REQUEST['type'];

    /**
     * Filters the returned ID of an uploaded attachment.
     *
     * The dynamic portion of the hook name, `$type`, refers to the attachment type.
     *
     * Possible hook names include:
     *
     *  - `async_upload_audio`
     *  - `async_upload_file`
     *  - `async_upload_image`
     *  - `async_upload_video`
     *
     * @since 2.5.0
     *
     * @param int $id Uploaded attachment ID.
     */
    echo apply_filters( "async_upload_{$type}", $id );
}