*/
define("PRIVACY_IMAGE_CACHE_DEFAULT_TIME", 86400); // 1 Day
require_once('include/security.php');
function privacy_image_cache_install() {
register_hook('bbcode', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_bbcode_hook');
register_hook('display_item', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_display_item_hook');
register_hook('ping_xmlize', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_ping_xmlize_hook');
register_hook('cron', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_cron');
}
function privacy_image_cache_uninstall() {
unregister_hook('bbcode', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_bbcode_hook');
unregister_hook('display_item', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_display_item_hook');
unregister_hook('ping_xmlize', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_ping_xmlize_hook');
unregister_hook('cron', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_cron');
}
function privacy_image_cache_module() {}
function privacy_image_cache_init() {
$urlhash = 'pic:' . sha1($_REQUEST['url']);
$r = q("SELECT * FROM `photo` WHERE `resource-id` = '%s' LIMIT 1", $urlhash );
if (count($r)) {
$img_str = $r[0]['data'];
}
else {
require_once("Photo.php");
$img_str = fetch_url($_REQUEST['url'],true);
$img = new Photo($img_str);
if($img->is_valid()) {
$img->store(0, 0, $urlhash, $_REQUEST['url'], '', 100);
$img_str = $img->imageString();
}
}
header("Content-type: image/jpeg");
header("Expires: " . gmdate("D, d M Y H:i:s", time() + (3600*24)) . " GMT");
header("Cache-Control: max-age=" . (3600*24));
echo $img_str;
killme();
}
/**
* @param $url string
* @return boolean
*/
function privacy_image_cache_is_local_image($url) {
if ($url[0] == '/') return true;
$baseurl = normalise_link(get_app()->get_baseurl());
$url = normalise_link($url);
return (substr($url, 0, strlen($baseurl)) == $baseurl);
}
/**
* @param array $matches
* @return string
*/
function privacy_image_cache_img_cb($matches) {
if (privacy_image_cache_is_local_image($matches[2])) return $matches[2];
return $matches[1] . "/privacy_image_cache/?url=" . escape_tags(addslashes($matches[2])) . $matches[3];
}
/**
* @param App $a
* @param string $o
*/
function privacy_image_cache_bbcode_hook(&$a, &$o) {
$o = preg_replace_callback("/(![]()
]*src *= *[\"'])([^\"']+)([\"'][^>]*>)/siU", "privacy_image_cache_img_cb", $o);
}
/**
* @param App $a
* @param string $o
*/
function privacy_image_cache_display_item_hook(&$a, &$o) {
if (isset($o["output"])) {
if (isset($o["output"]["thumb"]) && !privacy_image_cache_is_local_image($o["output"]["thumb"]))
$o["output"]["thumb"] = "/privacy_image_cache/?url=" . escape_tags(addslashes($o["output"]["thumb"]));
if (isset($o["output"]["author-avatar"]) && !privacy_image_cache_is_local_image($o["output"]["author-avatar"]))
$o["output"]["author-avatar"] = "/privacy_image_cache/?url=" . escape_tags(addslashes($o["output"]["author-avatar"]));
}
}
/**
* @param App $a
* @param string $o
*/
function privacy_image_cache_ping_xmlize_hook(&$a, &$o) {
if ($o["photo"] != "" && !privacy_image_cache_is_local_image($o["photo"]))
$o["photo"] = "/privacy_image_cache/?url=" . escape_tags(addslashes($o["photo"]));
}
/**
* @param App $a
* @param null|object $b
*/
function privacy_image_cache_cron(&$a = null, &$b = null) {
$cachetime = get_config('privacy_image_cache','cache_time');
if (!$cachetime) $cachetime = PRIVACY_IMAGE_CACHE_DEFAULT_TIME;
$last = get_config('pi_cache','last_delete');
$time = time();
if ($time < ($last + 3600)) return;
logger("Purging old Cache of the Privacy Image Cache", LOGGER_DEBUG);
q('DELETE FROM `photo` WHERE `uid` = 0 AND `resource-id` LIKE "pic:%%" AND `created` < NOW() - INTERVAL %d SECOND', $cachetime);
set_config('pi_cache', 'last_delete', $time);
}
/**
* @param App $a
* @param null|object $o
*/
function privacy_image_cache_plugin_admin(&$a, &$o){
$o = '';
$cachetime = get_config('privacy_image_cache','cache_time');
if (!$cachetime) $cachetime = PRIVACY_IMAGE_CACHE_DEFAULT_TIME;
$cachetime_h = Ceil($cachetime / 3600);
$o .= '
';
$o .= '';
$o .= '' . t('Cache Statistics') . '
';
$num = q('SELECT COUNT(*) num, SUM(LENGTH(data)) size FROM `photo` WHERE `uid`=0 AND `contact-id`=0 AND `resource-id` LIKE "pic:%%"');
$o .= '
';
$size = Ceil($num[0]['size'] / (1024 * 1024));
$o .= '
';
$o .= '';
}
/**
* @param App $a
* @param null|object $o
*/
function privacy_image_cache_plugin_admin_post(&$a = null, &$o = null){
check_form_security_token_redirectOnErr('/admin/plugins/privacy_image_cache', 'picsave');
if (isset($_REQUEST['save'])) {
$cachetime_h = IntVal($_REQUEST['cachetime']);
if ($cachetime_h < 1) $cachetime_h = 1;
set_config('privacy_image_cache','cache_time', $cachetime_h * 3600);
}
if (isset($_REQUEST['delete_all'])) {
q('DELETE FROM `photo` WHERE `uid` = 0 AND `resource-id` LIKE "pic:%%"');
}
}