4 * Name: Privacy Image Cache
6 * Author: Tobias Hößl <https://github.com/CatoTH/>
9 define("PRIVACY_IMAGE_CACHE_DEFAULT_TIME", 86400); // 1 Day
11 require_once('include/security.php');
13 function privacy_image_cache_install() {
14 register_hook('bbcode', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_bbcode_hook');
15 register_hook('display_item', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_display_item_hook');
16 register_hook('ping_xmlize', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_ping_xmlize_hook');
17 register_hook('cron', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_cron');
21 function privacy_image_cache_uninstall() {
22 unregister_hook('bbcode', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_bbcode_hook');
23 unregister_hook('display_item', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_display_item_hook');
24 unregister_hook('ping_xmlize', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_ping_xmlize_hook');
25 unregister_hook('cron', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_cron');
29 function privacy_image_cache_module() {}
32 function privacy_image_cache_init() {
33 $urlhash = 'pic:' . sha1($_REQUEST['url']);
34 $r = q("SELECT * FROM `photo` WHERE `resource-id` = '%s' LIMIT 1", $urlhash );
36 $img_str = $r[0]['data'];
39 require_once("Photo.php");
41 $img_str = fetch_url($_REQUEST['url'],true);
42 $img = new Photo($img_str);
43 if($img->is_valid()) {
44 $img->store(0, 0, $urlhash, $_REQUEST['url'], '', 100);
45 $img_str = $img->imageString();
50 header("Content-type: image/jpeg");
51 header("Expires: " . gmdate("D, d M Y H:i:s", time() + (3600*24)) . " GMT");
52 header("Cache-Control: max-age=" . (3600*24));
63 function privacy_image_cache_is_local_image($url) {
64 if ($url[0] == '/') return true;
65 // links normalised - bug #431
66 $baseurl = normalise_link(get_app()->get_baseurl());
67 $url = normalise_link($url);
68 return (substr($url, 0, strlen($baseurl)) == $baseurl);
72 * @param array $matches
75 function privacy_image_cache_img_cb($matches) {
76 // following line changed per bug #431
77 if (privacy_image_cache_is_local_image($matches[2])) return $matches[1] . $matches[2] . $matches[3];
78 return $matches[1] . "/privacy_image_cache/?url=" . escape_tags(addslashes($matches[2])) . $matches[3];
85 function privacy_image_cache_bbcode_hook(&$a, &$o) {
86 $o = preg_replace_callback("/(<img [^>]*src *= *[\"'])([^\"']+)([\"'][^>]*>)/siU", "privacy_image_cache_img_cb", $o);
94 function privacy_image_cache_display_item_hook(&$a, &$o) {
95 if (isset($o["output"])) {
96 if (isset($o["output"]["thumb"]) && !privacy_image_cache_is_local_image($o["output"]["thumb"]))
97 $o["output"]["thumb"] = "/privacy_image_cache/?url=" . escape_tags(addslashes($o["output"]["thumb"]));
98 if (isset($o["output"]["author-avatar"]) && !privacy_image_cache_is_local_image($o["output"]["author-avatar"]))
99 $o["output"]["author-avatar"] = "/privacy_image_cache/?url=" . escape_tags(addslashes($o["output"]["author-avatar"]));
108 function privacy_image_cache_ping_xmlize_hook(&$a, &$o) {
109 if ($o["photo"] != "" && !privacy_image_cache_is_local_image($o["photo"]))
110 $o["photo"] = "/privacy_image_cache/?url=" . escape_tags(addslashes($o["photo"]));
116 * @param null|object $b
118 function privacy_image_cache_cron(&$a = null, &$b = null) {
119 $cachetime = get_config('privacy_image_cache','cache_time');
120 if (!$cachetime) $cachetime = PRIVACY_IMAGE_CACHE_DEFAULT_TIME;
122 $last = get_config('pi_cache','last_delete');
124 if ($time < ($last + 3600)) return;
126 logger("Purging old Cache of the Privacy Image Cache", LOGGER_DEBUG);
127 q('DELETE FROM `photo` WHERE `uid` = 0 AND `resource-id` LIKE "pic:%%" AND `created` < NOW() - INTERVAL %d SECOND', $cachetime);
128 set_config('pi_cache', 'last_delete', $time);
136 * @param null|object $o
138 function privacy_image_cache_plugin_admin(&$a, &$o){
141 $o = '<input type="hidden" name="form_security_token" value="' . get_form_security_token("picsave") . '">';
143 $cachetime = get_config('privacy_image_cache','cache_time');
144 if (!$cachetime) $cachetime = PRIVACY_IMAGE_CACHE_DEFAULT_TIME;
145 $cachetime_h = Ceil($cachetime / 3600);
147 $o .= '<label for="pic_cachetime">' . t('Lifetime of the cache (in hours)') . '</label>
148 <input id="pic_cachetime" name="cachetime" type="text" value="' . escape_tags($cachetime_h) . '"><br style="clear: both;">';
150 $o .= '<input type="submit" name="save" value="' . t('Save') . '">';
152 $o .= '<h4>' . t('Cache Statistics') . '</h4>';
154 $num = q('SELECT COUNT(*) num, SUM(LENGTH(data)) size FROM `photo` WHERE `uid`=0 AND `contact-id`=0 AND `resource-id` LIKE "pic:%%"');
155 $o .= '<label for="statictics_num">' . t('Number of items') . '</label><input style="color: gray;" id="statistics_num" disabled value="' . escape_tags($num[0]['num']) . '"><br style="clear: both;">';
156 $size = Ceil($num[0]['size'] / (1024 * 1024));
157 $o .= '<label for="statictics_size">' . t('Size of the cache') . '</label><input style="color: gray;" id="statistics_size" disabled value="' . $size . ' MB"><br style="clear: both;">';
159 $o .= '<input type="submit" name="delete_all" value="' . t('Delete the whole cache') . '">';
165 * @param null|object $o
167 function privacy_image_cache_plugin_admin_post(&$a = null, &$o = null){
168 check_form_security_token_redirectOnErr('/admin/plugins/privacy_image_cache', 'picsave');
170 if (isset($_REQUEST['save'])) {
171 $cachetime_h = IntVal($_REQUEST['cachetime']);
172 if ($cachetime_h < 1) $cachetime_h = 1;
173 set_config('privacy_image_cache','cache_time', $cachetime_h * 3600);
175 if (isset($_REQUEST['delete_all'])) {
176 q('DELETE FROM `photo` WHERE `uid` = 0 AND `resource-id` LIKE "pic:%%"');