EcoCatLady

Hi there,

I haven’t actually installed this plugin – I was hoping you’d figured out how to redirect to an image if the hotlink was embedded in a page, vs. to a page if the hotlinked image was opened in a separate browser window/tab. From what I’m reading here looks like it’s an either/or solution at this point – which is sort of where I’m stuck myself.

If you do figure out how to get it to redirect to an image vs. page in those different circumstances, I’ll be installing this plugin pronto!

BTW – just thought I’d share this bit of code. This was my original code redirecting to the actual post where the image was first uploaded. Can’t take credit for it all as various chunks came from different forums, but it’s nice because if the hotlink points to a wordpress generated thumbnail of the image rather than the original, it still takes you to the original post. This, of course, only works if you uploaded the image as a child to a post – if you uploaded it directly to the library then the image won’t have a parentID and it won’t work.

This worked like a charm, but I wouldn’t recommend using it on a big site or a site with many hotlinks coming in. With my site it slowed the server down to a crawl. So… I’m currently working on a less elegant solution that won’t require loading wordpress for every hotlink request that comes in. Anyhow, if any part of this is helpful to you, please feel free to use it.

<?php

define( 'WP_USE_THEMES', false );
require('wp-blog-header.php');

function pn_get_attachment_id_from_url( $attachment_url = '' ) {

	global $wpdb;
	$attachment_id = false;

	// If there is no url, return.
	if ( '' == $attachment_url )
		return;

	// Get the upload directory paths
	$upload_dir_paths = wp_upload_dir();

	// Make sure the upload path base directory exists in the attachment URL, to verify that we're working with a media library image
	if ( false !== strpos( $attachment_url, $upload_dir_paths['baseurl'] ) ) {

		// If this is the URL of an auto-generated thumbnail, get the URL of the original image
		$attachment_url = preg_replace( '/-\d+x\d+(?=\.(jpg|jpeg|png|gif)$)/i', '', $attachment_url );

		// Remove the upload path base directory from the attachment URL
		$attachment_url = str_replace( $upload_dir_paths['baseurl'] . '/', '', $attachment_url );

		// Finally, run a custom database query to get the attachment ID from the modified attachment URL
		$attachment_id = $wpdb->get_var( $wpdb->prepare( "SELECT wposts.ID FROM $wpdb->posts wposts, $wpdb->postmeta wpostmeta WHERE wposts.ID = wpostmeta.post_id AND wpostmeta.meta_key = '_wp_attached_file' AND wpostmeta.meta_value = '%s' AND wposts.post_type = 'attachment'", $attachment_url ) );

	}

	return $attachment_id;
}

// set the image url
$inurl=$_GET['p'];
$attachment_url= "http://" . $_SERVER['HTTP_HOST'] ."/".$inurl;

// store the image ID in a var
$image_id = pn_get_attachment_id_from_url($attachment_url);

// get post where image appears
$parent = get_post_field( 'post_parent', $image_id);
$link = get_permalink($parent);

// add header
header( "Location:$link" ) ;
?>